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Diffstat (limited to 'kpdf/xpdf/xpdf/TextOutputDev.cpp')
| -rw-r--r-- | kpdf/xpdf/xpdf/TextOutputDev.cpp | 4090 |
1 files changed, 4090 insertions, 0 deletions
diff --git a/kpdf/xpdf/xpdf/TextOutputDev.cpp b/kpdf/xpdf/xpdf/TextOutputDev.cpp new file mode 100644 index 00000000..3387a31a --- /dev/null +++ b/kpdf/xpdf/xpdf/TextOutputDev.cpp @@ -0,0 +1,4090 @@ +//======================================================================== +// +// TextOutputDev.cpp +// +// Copyright 1997-2003 Glyph & Cog, LLC +// +//======================================================================== + +#include <aconf.h> + +#ifdef USE_GCC_PRAGMAS +#pragma implementation +#endif + +#include <stdio.h> +#include <stdlib.h> +#include <stddef.h> +#include <math.h> +#include <ctype.h> +#ifdef WIN32 +#include <fcntl.h> // for O_BINARY +#include <io.h> // for setmode +#endif +#include "gmem.h" +#include "GString.h" +#include "GList.h" +#include "config.h" +#include "Error.h" +#include "GlobalParams.h" +#include "UnicodeMap.h" +#include "UnicodeTypeTable.h" +#include "GfxState.h" +#include "Link.h" +#include "TextOutputDev.h" + +#ifdef MACOS +// needed for setting type/creator of MacOS files +#include "ICSupport.h" +#endif + +//------------------------------------------------------------------------ +// parameters +//------------------------------------------------------------------------ + +// Each bucket in a text pool includes baselines within a range of +// this many points. +#define textPoolStep 4 + +// Inter-character space width which will cause addChar to start a new +// word. +#define minWordBreakSpace 0.1 + +// Negative inter-character space width, i.e., overlap, which will +// cause addChar to start a new word. +#define minDupBreakOverlap 0.2 + +// Max distance between baselines of two lines within a block, as a +// fraction of the font size. +#define maxLineSpacingDelta 1.5 + +// Max difference in primary font sizes on two lines in the same +// block. Delta1 is used when examining new lines above and below the +// current block; delta2 is used when examining text that overlaps the +// current block; delta3 is used when examining text to the left and +// right of the current block. +#define maxBlockFontSizeDelta1 0.05 +#define maxBlockFontSizeDelta2 0.6 +#define maxBlockFontSizeDelta3 0.2 + +// Max difference in font sizes inside a word. +#define maxWordFontSizeDelta 0.05 + +// Maximum distance between baselines of two words on the same line, +// e.g., distance between subscript or superscript and the primary +// baseline, as a fraction of the font size. +#define maxIntraLineDelta 0.5 + +// Minimum inter-word spacing, as a fraction of the font size. (Only +// used for raw ordering.) +#define minWordSpacing 0.15 + +// Maximum inter-word spacing, as a fraction of the font size. +#define maxWordSpacing 1.5 + +// Maximum horizontal spacing which will allow a word to be pulled +// into a block. +#define minColSpacing1 0.3 + +// Minimum spacing between columns, as a fraction of the font size. +#define minColSpacing2 1.0 + +// Maximum vertical spacing between blocks within a flow, as a +// multiple of the font size. +#define maxBlockSpacing 2.5 + +// Minimum spacing between characters within a word, as a fraction of +// the font size. +#define minCharSpacing -0.2 + +// Maximum spacing between characters within a word, as a fraction of +// the font size, when there is no obvious extra-wide character +// spacing. +#define maxCharSpacing 0.03 + +// When extra-wide character spacing is detected, the inter-character +// space threshold is set to the minimum inter-character space +// multiplied by this constant. +#define maxWideCharSpacingMul 1.3 + +// Upper limit on spacing between characters in a word. +#define maxWideCharSpacing 0.4 + +// Max difference in primary,secondary coordinates (as a fraction of +// the font size) allowed for duplicated text (fake boldface, drop +// shadows) which is to be discarded. +#define dupMaxPriDelta 0.1 +#define dupMaxSecDelta 0.2 + +// Max width of underlines (in points). +#define maxUnderlineWidth 3 + +// Min distance between baseline and underline (in points). +//~ this should be font-size-dependent +#define minUnderlineGap -2 + +// Max distance between baseline and underline (in points). +//~ this should be font-size-dependent +#define maxUnderlineGap 4 + +// Max horizontal distance between edge of word and start of underline +// (in points). +//~ this should be font-size-dependent +#define underlineSlack 1 + +// Max distance between edge of text and edge of link border +#define hyperlinkSlack 2 + +//------------------------------------------------------------------------ +// TextUnderline +//------------------------------------------------------------------------ + +class TextUnderline { +public: + + TextUnderline(double x0A, double y0A, double x1A, double y1A) + { x0 = x0A; y0 = y0A; x1 = x1A; y1 = y1A; horiz = y0 == y1; } + ~TextUnderline() {} + + double x0, y0, x1, y1; + GBool horiz; +}; + +//------------------------------------------------------------------------ +// TextLink +//------------------------------------------------------------------------ + +class TextLink { +public: + + TextLink(int xMinA, int yMinA, int xMaxA, int yMaxA, Link *linkA) + { xMin = xMinA; yMin = yMinA; xMax = xMaxA; yMax = yMaxA; link = linkA; } + ~TextLink() {} + + int xMin, yMin, xMax, yMax; + Link *link; +}; + +//------------------------------------------------------------------------ +// TextFontInfo +//------------------------------------------------------------------------ + +TextFontInfo::TextFontInfo(GfxState *state) { + gfxFont = state->getFont(); +#if TEXTOUT_WORD_LIST + fontName = (gfxFont && gfxFont->getOrigName()) + ? gfxFont->getOrigName()->copy() + : (GString *)NULL; + flags = gfxFont ? gfxFont->getFlags() : 0; +#endif +} + +TextFontInfo::~TextFontInfo() { +#if TEXTOUT_WORD_LIST + if (fontName) { + delete fontName; + } +#endif +} + +GBool TextFontInfo::matches(GfxState *state) { + return state->getFont() == gfxFont; +} + +//------------------------------------------------------------------------ +// TextWord +//------------------------------------------------------------------------ + +TextWord::TextWord(GfxState *state, int rotA, double x0, double y0, + int charPosA, TextFontInfo *fontA, double fontSizeA) { + GfxFont *gfxFont; + double x, y, ascent, descent; + + rot = rotA; + charPos = charPosA; + charLen = 0; + font = fontA; + fontSize = fontSizeA; + state->transform(x0, y0, &x, &y); + if ((gfxFont = font->gfxFont)) { + ascent = gfxFont->getAscent() * fontSize; + descent = gfxFont->getDescent() * fontSize; + } else { + // this means that the PDF file draws text without a current font, + // which should never happen + ascent = 0.95 * fontSize; + descent = -0.35 * fontSize; + } + switch (rot) { + case 0: + yMin = y - ascent; + yMax = y - descent; + if (yMin == yMax) { + // this is a sanity check for a case that shouldn't happen -- but + // if it does happen, we want to avoid dividing by zero later + yMin = y; + yMax = y + 1; + } + base = y; + break; + case 1: + xMin = x + descent; + xMax = x + ascent; + if (xMin == xMax) { + // this is a sanity check for a case that shouldn't happen -- but + // if it does happen, we want to avoid dividing by zero later + xMin = x; + xMax = x + 1; + } + base = x; + break; + case 2: + yMin = y + descent; + yMax = y + ascent; + if (yMin == yMax) { + // this is a sanity check for a case that shouldn't happen -- but + // if it does happen, we want to avoid dividing by zero later + yMin = y; + yMax = y + 1; + } + base = y; + break; + case 3: + xMin = x - ascent; + xMax = x - descent; + if (xMin == xMax) { + // this is a sanity check for a case that shouldn't happen -- but + // if it does happen, we want to avoid dividing by zero later + xMin = x; + xMax = x + 1; + } + base = x; + break; + } + text = NULL; + edge = NULL; + len = size = 0; + spaceAfter = gFalse; + next = NULL; + +#if TEXTOUT_WORD_LIST + GfxRGB rgb; + + if ((state->getRender() & 3) == 1) { + state->getStrokeRGB(&rgb); + } else { + state->getFillRGB(&rgb); + } + colorR = colToDbl(rgb.r); + colorG = colToDbl(rgb.g); + colorB = colToDbl(rgb.b); +#endif + + underlined = gFalse; + link = NULL; +} + +TextWord::~TextWord() { + gfree(text); + gfree(edge); +} + +void TextWord::addChar(GfxState * /*state*/, double x, double y, + double dx, double dy, Unicode u) { + if (len == size) { + size += 16; + text = (Unicode *)greallocn(text, size, sizeof(Unicode)); + edge = (double *)greallocn(edge, size + 1, sizeof(double)); + } + text[len] = u; + switch (rot) { + case 0: + if (len == 0) { + xMin = x; + } + edge[len] = x; + xMax = edge[len+1] = x + dx; + break; + case 1: + if (len == 0) { + yMin = y; + } + edge[len] = y; + yMax = edge[len+1] = y + dy; + break; + case 2: + if (len == 0) { + xMax = x; + } + edge[len] = x; + xMin = edge[len+1] = x + dx; + break; + case 3: + if (len == 0) { + yMax = y; + } + edge[len] = y; + yMin = edge[len+1] = y + dy; + break; + } + ++len; +} + +void TextWord::merge(TextWord *word) { + int i; + + if (word->xMin < xMin) { + xMin = word->xMin; + } + if (word->yMin < yMin) { + yMin = word->yMin; + } + if (word->xMax > xMax) { + xMax = word->xMax; + } + if (word->yMax > yMax) { + yMax = word->yMax; + } + if (len + word->len > size) { + size = len + word->len; + text = (Unicode *)greallocn(text, size, sizeof(Unicode)); + edge = (double *)greallocn(edge, size + 1, sizeof(double)); + } + for (i = 0; i < word->len; ++i) { + text[len + i] = word->text[i]; + edge[len + i] = word->edge[i]; + } + edge[len + word->len] = word->edge[word->len]; + len += word->len; + charLen += word->charLen; +} + +inline int TextWord::primaryCmp(TextWord *word) { + double cmp; + + cmp = 0; // make gcc happy + switch (rot) { + case 0: + cmp = xMin - word->xMin; + break; + case 1: + cmp = yMin - word->yMin; + break; + case 2: + cmp = word->xMax - xMax; + break; + case 3: + cmp = word->yMax - yMax; + break; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; +} + +double TextWord::primaryDelta(TextWord *word) { + double delta; + + delta = 0; // make gcc happy + switch (rot) { + case 0: + delta = word->xMin - xMax; + break; + case 1: + delta = word->yMin - yMax; + break; + case 2: + delta = xMin - word->xMax; + break; + case 3: + delta = yMin - word->yMax; + break; + } + return delta; +} + +int TextWord::cmpYX(const void *p1, const void *p2) { + TextWord *word1 = *(TextWord **)p1; + TextWord *word2 = *(TextWord **)p2; + double cmp; + + cmp = word1->yMin - word2->yMin; + if (cmp == 0) { + cmp = word1->xMin - word2->xMin; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; +} + +#if TEXTOUT_WORD_LIST + +GString *TextWord::getText() { + GString *s; + UnicodeMap *uMap; + char buf[8]; + int n, i; + + s = new GString(); + if (!(uMap = globalParams->getTextEncoding())) { + return s; + } + for (i = 0; i < len; ++i) { + n = uMap->mapUnicode(text[i], buf, sizeof(buf)); + s->append(buf, n); + } + uMap->decRefCnt(); + return s; +} + +void TextWord::getCharBBox(int charIdx, double *xMinA, double *yMinA, + double *xMaxA, double *yMaxA) { + if (charIdx < 0 || charIdx >= len) { + return; + } + switch (rot) { + case 0: + *xMinA = edge[charIdx]; + *xMaxA = edge[charIdx + 1]; + *yMinA = yMin; + *yMaxA = yMax; + break; + case 1: + *xMinA = xMin; + *xMaxA = xMax; + *yMinA = edge[charIdx]; + *yMaxA = edge[charIdx + 1]; + break; + case 2: + *xMinA = edge[charIdx + 1]; + *xMaxA = edge[charIdx]; + *yMinA = yMin; + *yMaxA = yMax; + break; + case 3: + *xMinA = xMin; + *xMaxA = xMax; + *yMinA = edge[charIdx + 1]; + *yMaxA = edge[charIdx]; + break; + } +} + +#endif // TEXTOUT_WORD_LIST + +//------------------------------------------------------------------------ +// TextPool +//------------------------------------------------------------------------ + +TextPool::TextPool() { + minBaseIdx = 0; + maxBaseIdx = -1; + pool = NULL; + cursor = NULL; + cursorBaseIdx = -1; +} + +TextPool::~TextPool() { + int baseIdx; + TextWord *word, *word2; + + for (baseIdx = minBaseIdx; baseIdx <= maxBaseIdx; ++baseIdx) { + for (word = pool[baseIdx - minBaseIdx]; word; word = word2) { + word2 = word->next; + delete word; + } + } + gfree(pool); +} + +int TextPool::getBaseIdx(double base) { + int baseIdx; + + baseIdx = (int)(base / textPoolStep); + if (baseIdx < minBaseIdx) { + return minBaseIdx; + } + if (baseIdx > maxBaseIdx) { + return maxBaseIdx; + } + return baseIdx; +} + +void TextPool::addWord(TextWord *word) { + TextWord **newPool; + int wordBaseIdx, newMinBaseIdx, newMaxBaseIdx, baseIdx; + TextWord *w0, *w1; + + // expand the array if needed + wordBaseIdx = (int)(word->base / textPoolStep); + if (minBaseIdx > maxBaseIdx) { + minBaseIdx = wordBaseIdx - 128; + maxBaseIdx = wordBaseIdx + 128; + pool = (TextWord **)gmallocn(maxBaseIdx - minBaseIdx + 1, + sizeof(TextWord *)); + for (baseIdx = minBaseIdx; baseIdx <= maxBaseIdx; ++baseIdx) { + pool[baseIdx - minBaseIdx] = NULL; + } + } else if (wordBaseIdx < minBaseIdx) { + newMinBaseIdx = wordBaseIdx - 128; + newPool = (TextWord **)gmallocn(maxBaseIdx - newMinBaseIdx + 1, + sizeof(TextWord *)); + for (baseIdx = newMinBaseIdx; baseIdx < minBaseIdx; ++baseIdx) { + newPool[baseIdx - newMinBaseIdx] = NULL; + } + memcpy(&newPool[minBaseIdx - newMinBaseIdx], pool, + (maxBaseIdx - minBaseIdx + 1) * sizeof(TextWord *)); + gfree(pool); + pool = newPool; + minBaseIdx = newMinBaseIdx; + } else if (wordBaseIdx > maxBaseIdx) { + newMaxBaseIdx = wordBaseIdx + 128; + pool = (TextWord **)greallocn(pool, newMaxBaseIdx - minBaseIdx + 1, + sizeof(TextWord *)); + for (baseIdx = maxBaseIdx + 1; baseIdx <= newMaxBaseIdx; ++baseIdx) { + pool[baseIdx - minBaseIdx] = NULL; + } + maxBaseIdx = newMaxBaseIdx; + } + + // insert the new word + if (cursor && wordBaseIdx == cursorBaseIdx && + word->primaryCmp(cursor) > 0) { + w0 = cursor; + w1 = cursor->next; + } else { + w0 = NULL; + w1 = pool[wordBaseIdx - minBaseIdx]; + } + for (; w1 && word->primaryCmp(w1) > 0; w0 = w1, w1 = w1->next) ; + word->next = w1; + if (w0) { + w0->next = word; + } else { + pool[wordBaseIdx - minBaseIdx] = word; + } + cursor = word; + cursorBaseIdx = wordBaseIdx; +} + +//------------------------------------------------------------------------ +// TextLine +//------------------------------------------------------------------------ + +TextLine::TextLine(TextBlock *blkA, int rotA, double baseA) { + blk = blkA; + rot = rotA; + xMin = yMin = 0; + xMax = yMax = -1; + base = baseA; + words = lastWord = NULL; + text = NULL; + edge = NULL; + col = NULL; + len = 0; + convertedLen = 0; + hyphenated = gFalse; + next = NULL; +} + +TextLine::~TextLine() { + TextWord *word; + + while (words) { + word = words; + words = words->next; + delete word; + } + gfree(text); + gfree(edge); + gfree(col); +} + +void TextLine::addWord(TextWord *word) { + if (lastWord) { + lastWord->next = word; + } else { + words = word; + } + lastWord = word; + + if (xMin > xMax) { + xMin = word->xMin; + xMax = word->xMax; + yMin = word->yMin; + yMax = word->yMax; + } else { + if (word->xMin < xMin) { + xMin = word->xMin; + } + if (word->xMax > xMax) { + xMax = word->xMax; + } + if (word->yMin < yMin) { + yMin = word->yMin; + } + if (word->yMax > yMax) { + yMax = word->yMax; + } + } +} + +double TextLine::primaryDelta(TextLine *line) { + double delta; + + delta = 0; // make gcc happy + switch (rot) { + case 0: + delta = line->xMin - xMax; + break; + case 1: + delta = line->yMin - yMax; + break; + case 2: + delta = xMin - line->xMax; + break; + case 3: + delta = yMin - line->yMax; + break; + } + return delta; +} + +int TextLine::primaryCmp(TextLine *line) { + double cmp; + + cmp = 0; // make gcc happy + switch (rot) { + case 0: + cmp = xMin - line->xMin; + break; + case 1: + cmp = yMin - line->yMin; + break; + case 2: + cmp = line->xMax - xMax; + break; + case 3: + cmp = line->yMax - yMax; + break; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; +} + +int TextLine::secondaryCmp(TextLine *line) { + double cmp; + + cmp = (rot == 0 || rot == 3) ? base - line->base : line->base - base; + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; +} + +int TextLine::cmpYX(TextLine *line) { + int cmp; + + if ((cmp = secondaryCmp(line))) { + return cmp; + } + return primaryCmp(line); +} + +int TextLine::cmpXY(const void *p1, const void *p2) { + TextLine *line1 = *(TextLine **)p1; + TextLine *line2 = *(TextLine **)p2; + int cmp; + + if ((cmp = line1->primaryCmp(line2))) { + return cmp; + } + return line1->secondaryCmp(line2); +} + +void TextLine::coalesce(UnicodeMap *uMap) { + TextWord *word0, *word1; + double space, delta, minSpace; + GBool isUnicode; + char buf[8]; + int i, j; + + if (words->next) { + + // compute the inter-word space threshold + if (words->len > 1 || words->next->len > 1) { + minSpace = 0; + } else { + minSpace = words->primaryDelta(words->next); + for (word0 = words->next, word1 = word0->next; + word1 && minSpace > 0; + word0 = word1, word1 = word0->next) { + if (word1->len > 1) { + minSpace = 0; + } + delta = word0->primaryDelta(word1); + if (delta < minSpace) { + minSpace = delta; + } + } + } + if (minSpace <= 0) { + space = maxCharSpacing * words->fontSize; + } else { + space = maxWideCharSpacingMul * minSpace; + if (space > maxWideCharSpacing * words->fontSize) { + space = maxWideCharSpacing * words->fontSize; + } + } + + // merge words + word0 = words; + word1 = words->next; + while (word1) { + if (word0->primaryDelta(word1) >= space) { + word0->spaceAfter = gTrue; + word0 = word1; + word1 = word1->next; + } else if (word0->font == word1->font && + word0->underlined == word1->underlined && + fabs(word0->fontSize - word1->fontSize) < + maxWordFontSizeDelta * words->fontSize && + word1->charPos == word0->charPos + word0->charLen) { + word0->merge(word1); + word0->next = word1->next; + delete word1; + word1 = word0->next; + } else { + word0 = word1; + word1 = word1->next; + } + } + } + + // build the line text + isUnicode = uMap ? uMap->isUnicode() : gFalse; + len = 0; + for (word1 = words; word1; word1 = word1->next) { + len += word1->len; + if (word1->spaceAfter) { + ++len; + } + } + text = (Unicode *)gmallocn(len, sizeof(Unicode)); + edge = (double *)gmallocn(len + 1, sizeof(double)); + i = 0; + for (word1 = words; word1; word1 = word1->next) { + for (j = 0; j < word1->len; ++j) { + text[i] = word1->text[j]; + edge[i] = word1->edge[j]; + ++i; + } + edge[i] = word1->edge[word1->len]; + if (word1->spaceAfter) { + text[i] = (Unicode)0x0020; + ++i; + } + } + + // compute convertedLen and set up the col array + col = (int *)gmallocn(len + 1, sizeof(int)); + convertedLen = 0; + for (i = 0; i < len; ++i) { + col[i] = convertedLen; + if (isUnicode) { + ++convertedLen; + } else if (uMap) { + convertedLen += uMap->mapUnicode(text[i], buf, sizeof(buf)); + } + } + col[len] = convertedLen; + + // check for hyphen at end of line + //~ need to check for other chars used as hyphens + hyphenated = text[len - 1] == (Unicode)'-'; +} + +//------------------------------------------------------------------------ +// TextLineFrag +//------------------------------------------------------------------------ + +class TextLineFrag { +public: + + TextLine *line; // the line object + int start, len; // offset and length of this fragment + // (in Unicode chars) + double xMin, xMax; // bounding box coordinates + double yMin, yMax; + double base; // baseline virtual coordinate + int col; // first column + + void init(TextLine *lineA, int startA, int lenA); + void computeCoords(GBool oneRot); + + static int cmpYXPrimaryRot(const void *p1, const void *p2); + static int cmpYXLineRot(const void *p1, const void *p2); + static int cmpXYLineRot(const void *p1, const void *p2); + static int cmpXYColumnPrimaryRot(const void *p1, const void *p2); + static int cmpXYColumnLineRot(const void *p1, const void *p2); +}; + +void TextLineFrag::init(TextLine *lineA, int startA, int lenA) { + line = lineA; + start = startA; + len = lenA; + col = line->col[start]; +} + +void TextLineFrag::computeCoords(GBool oneRot) { + TextBlock *blk; + double d0, d1, d2, d3, d4; + + if (oneRot) { + + switch (line->rot) { + case 0: + xMin = line->edge[start]; + xMax = line->edge[start + len]; + yMin = line->yMin; + yMax = line->yMax; + break; + case 1: + xMin = line->xMin; + xMax = line->xMax; + yMin = line->edge[start]; + yMax = line->edge[start + len]; + break; + case 2: + xMin = line->edge[start + len]; + xMax = line->edge[start]; + yMin = line->yMin; + yMax = line->yMax; + break; + case 3: + xMin = line->xMin; + xMax = line->xMax; + yMin = line->edge[start + len]; + yMax = line->edge[start]; + break; + } + base = line->base; + + } else { + + if (line->rot == 0 && line->blk->page->primaryRot == 0) { + + xMin = line->edge[start]; + xMax = line->edge[start + len]; + yMin = line->yMin; + yMax = line->yMax; + base = line->base; + + } else { + + blk = line->blk; + d0 = line->edge[start]; + d1 = line->edge[start + len]; + d2 = d3 = d4 = 0; // make gcc happy + + switch (line->rot) { + case 0: + d2 = line->yMin; + d3 = line->yMax; + d4 = line->base; + d0 = (d0 - blk->xMin) / (blk->xMax - blk->xMin); + d1 = (d1 - blk->xMin) / (blk->xMax - blk->xMin); + d2 = (d2 - blk->yMin) / (blk->yMax - blk->yMin); + d3 = (d3 - blk->yMin) / (blk->yMax - blk->yMin); + d4 = (d4 - blk->yMin) / (blk->yMax - blk->yMin); + break; + case 1: + d2 = line->xMax; + d3 = line->xMin; + d4 = line->base; + d0 = (d0 - blk->yMin) / (blk->yMax - blk->yMin); + d1 = (d1 - blk->yMin) / (blk->yMax - blk->yMin); + d2 = (blk->xMax - d2) / (blk->xMax - blk->xMin); + d3 = (blk->xMax - d3) / (blk->xMax - blk->xMin); + d4 = (blk->xMax - d4) / (blk->xMax - blk->xMin); + break; + case 2: + d2 = line->yMax; + d3 = line->yMin; + d4 = line->base; + d0 = (blk->xMax - d0) / (blk->xMax - blk->xMin); + d1 = (blk->xMax - d1) / (blk->xMax - blk->xMin); + d2 = (blk->yMax - d2) / (blk->yMax - blk->yMin); + d3 = (blk->yMax - d3) / (blk->yMax - blk->yMin); + d4 = (blk->yMax - d4) / (blk->yMax - blk->yMin); + break; + case 3: + d2 = line->xMin; + d3 = line->xMax; + d4 = line->base; + d0 = (blk->yMax - d0) / (blk->yMax - blk->yMin); + d1 = (blk->yMax - d1) / (blk->yMax - blk->yMin); + d2 = (d2 - blk->xMin) / (blk->xMax - blk->xMin); + d3 = (d3 - blk->xMin) / (blk->xMax - blk->xMin); + d4 = (d4 - blk->xMin) / (blk->xMax - blk->xMin); + break; + } + + switch (line->blk->page->primaryRot) { + case 0: + xMin = blk->xMin + d0 * (blk->xMax - blk->xMin); + xMax = blk->xMin + d1 * (blk->xMax - blk->xMin); + yMin = blk->yMin + d2 * (blk->yMax - blk->yMin); + yMax = blk->yMin + d3 * (blk->yMax - blk->yMin); + base = blk->yMin + base * (blk->yMax - blk->yMin); + break; + case 1: + xMin = blk->xMax - d3 * (blk->xMax - blk->xMin); + xMax = blk->xMax - d2 * (blk->xMax - blk->xMin); + yMin = blk->yMin + d0 * (blk->yMax - blk->yMin); + yMax = blk->yMin + d1 * (blk->yMax - blk->yMin); + base = blk->xMax - d4 * (blk->xMax - blk->xMin); + break; + case 2: + xMin = blk->xMax - d1 * (blk->xMax - blk->xMin); + xMax = blk->xMax - d0 * (blk->xMax - blk->xMin); + yMin = blk->yMax - d3 * (blk->yMax - blk->yMin); + yMax = blk->yMax - d2 * (blk->yMax - blk->yMin); + base = blk->yMax - d4 * (blk->yMax - blk->yMin); + break; + case 3: + xMin = blk->xMin + d2 * (blk->xMax - blk->xMin); + xMax = blk->xMin + d3 * (blk->xMax - blk->xMin); + yMin = blk->yMax - d1 * (blk->yMax - blk->yMin); + yMax = blk->yMax - d0 * (blk->yMax - blk->yMin); + base = blk->xMin + d4 * (blk->xMax - blk->xMin); + break; + } + + } + } +} + +int TextLineFrag::cmpYXPrimaryRot(const void *p1, const void *p2) { + TextLineFrag *frag1 = (TextLineFrag *)p1; + TextLineFrag *frag2 = (TextLineFrag *)p2; + double cmp; + + cmp = 0; // make gcc happy + switch (frag1->line->blk->page->primaryRot) { + case 0: + if (fabs(cmp = frag1->yMin - frag2->yMin) < 0.01) { + cmp = frag1->xMin - frag2->xMin; + } + break; + case 1: + if (fabs(cmp = frag2->xMax - frag1->xMax) < 0.01) { + cmp = frag1->yMin - frag2->yMin; + } + break; + case 2: + if (fabs(cmp = frag2->yMin - frag1->yMin) < 0.01) { + cmp = frag2->xMax - frag1->xMax; + } + break; + case 3: + if (fabs(cmp = frag1->xMax - frag2->xMax) < 0.01) { + cmp = frag2->yMax - frag1->yMax; + } + break; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; +} + +int TextLineFrag::cmpYXLineRot(const void *p1, const void *p2) { + TextLineFrag *frag1 = (TextLineFrag *)p1; + TextLineFrag *frag2 = (TextLineFrag *)p2; + double cmp; + + cmp = 0; // make gcc happy + switch (frag1->line->rot) { + case 0: + if ((cmp = frag1->yMin - frag2->yMin) == 0) { + cmp = frag1->xMin - frag2->xMin; + } + break; + case 1: + if ((cmp = frag2->xMax - frag1->xMax) == 0) { + cmp = frag1->yMin - frag2->yMin; + } + break; + case 2: + if ((cmp = frag2->yMin - frag1->yMin) == 0) { + cmp = frag2->xMax - frag1->xMax; + } + break; + case 3: + if ((cmp = frag1->xMax - frag2->xMax) == 0) { + cmp = frag2->yMax - frag1->yMax; + } + break; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; +} + +int TextLineFrag::cmpXYLineRot(const void *p1, const void *p2) { + TextLineFrag *frag1 = (TextLineFrag *)p1; + TextLineFrag *frag2 = (TextLineFrag *)p2; + double cmp; + + cmp = 0; // make gcc happy + switch (frag1->line->rot) { + case 0: + if ((cmp = frag1->xMin - frag2->xMin) == 0) { + cmp = frag1->yMin - frag2->yMin; + } + break; + case 1: + if ((cmp = frag1->yMin - frag2->yMin) == 0) { + cmp = frag2->xMax - frag1->xMax; + } + break; + case 2: + if ((cmp = frag2->xMax - frag1->xMax) == 0) { + cmp = frag2->yMin - frag1->yMin; + } + break; + case 3: + if ((cmp = frag2->yMax - frag1->yMax) == 0) { + cmp = frag1->xMax - frag2->xMax; + } + break; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; +} + +int TextLineFrag::cmpXYColumnPrimaryRot(const void *p1, const void *p2) { + TextLineFrag *frag1 = (TextLineFrag *)p1; + TextLineFrag *frag2 = (TextLineFrag *)p2; + double cmp; + + // if columns overlap, compare y values + if (frag1->col < frag2->col + (frag2->line->col[frag2->start + frag2->len] - + frag2->line->col[frag2->start]) && + frag2->col < frag1->col + (frag1->line->col[frag1->start + frag1->len] - + frag1->line->col[frag1->start])) { + cmp = 0; // make gcc happy + switch (frag1->line->blk->page->primaryRot) { + case 0: cmp = frag1->yMin - frag2->yMin; break; + case 1: cmp = frag2->xMax - frag1->xMax; break; + case 2: cmp = frag2->yMin - frag1->yMin; break; + case 3: cmp = frag1->xMax - frag2->xMax; break; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; + } + + // otherwise, compare starting column + return frag1->col - frag2->col; +} + +int TextLineFrag::cmpXYColumnLineRot(const void *p1, const void *p2) { + TextLineFrag *frag1 = (TextLineFrag *)p1; + TextLineFrag *frag2 = (TextLineFrag *)p2; + double cmp; + + // if columns overlap, compare y values + if (frag1->col < frag2->col + (frag2->line->col[frag2->start + frag2->len] - + frag2->line->col[frag2->start]) && + frag2->col < frag1->col + (frag1->line->col[frag1->start + frag1->len] - + frag1->line->col[frag1->start])) { + cmp = 0; // make gcc happy + switch (frag1->line->rot) { + case 0: cmp = frag1->yMin - frag2->yMin; break; + case 1: cmp = frag2->xMax - frag1->xMax; break; + case 2: cmp = frag2->yMin - frag1->yMin; break; + case 3: cmp = frag1->xMax - frag2->xMax; break; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; + } + + // otherwise, compare starting column + return frag1->col - frag2->col; +} + +//------------------------------------------------------------------------ +// TextBlock +//------------------------------------------------------------------------ + +TextBlock::TextBlock(TextPage *pageA, int rotA) { + page = pageA; + rot = rotA; + xMin = yMin = 0; + xMax = yMax = -1; + priMin = 0; + priMax = page->pageWidth; + pool = new TextPool(); + lines = NULL; + curLine = NULL; + next = NULL; + stackNext = NULL; +} + +TextBlock::~TextBlock() { + TextLine *line; + + delete pool; + while (lines) { + line = lines; + lines = lines->next; + delete line; + } +} + +void TextBlock::addWord(TextWord *word) { + pool->addWord(word); + if (xMin > xMax) { + xMin = word->xMin; + xMax = word->xMax; + yMin = word->yMin; + yMax = word->yMax; + } else { + if (word->xMin < xMin) { + xMin = word->xMin; + } + if (word->xMax > xMax) { + xMax = word->xMax; + } + if (word->yMin < yMin) { + yMin = word->yMin; + } + if (word->yMax > yMax) { + yMax = word->yMax; + } + } +} + +void TextBlock::coalesce(UnicodeMap *uMap) { + TextWord *word0, *word1, *word2, *bestWord0, *bestWord1, *lastWord; + TextLine *line, *line0, *line1; + int poolMinBaseIdx, startBaseIdx, minBaseIdx, maxBaseIdx; + int baseIdx, bestWordBaseIdx, idx0, idx1; + double minBase, maxBase; + double fontSize, delta, priDelta, secDelta; + TextLine **lineArray; + GBool found; + int col1, col2; + int i, j, k; + + // discard duplicated text (fake boldface, drop shadows) + for (idx0 = pool->minBaseIdx; idx0 <= pool->maxBaseIdx; ++idx0) { + word0 = pool->getPool(idx0); + while (word0) { + priDelta = dupMaxPriDelta * word0->fontSize; + secDelta = dupMaxSecDelta * word0->fontSize; + if (rot == 0 || rot == 3) { + maxBaseIdx = pool->getBaseIdx(word0->base + secDelta); + } else { + maxBaseIdx = pool->getBaseIdx(word0->base - secDelta); + } + found = gFalse; + word1 = word2 = NULL; // make gcc happy + for (idx1 = idx0; idx1 <= maxBaseIdx; ++idx1) { + if (idx1 == idx0) { + word1 = word0; + word2 = word0->next; + } else { + word1 = NULL; + word2 = pool->getPool(idx1); + } + for (; word2; word1 = word2, word2 = word2->next) { + if (word2->len == word0->len && + !memcmp(word2->text, word0->text, + word0->len * sizeof(Unicode))) { + switch (rot) { + case 0: + case 2: + found = fabs(word0->xMin - word2->xMin) < priDelta && + fabs(word0->xMax - word2->xMax) < priDelta && + fabs(word0->yMin - word2->yMin) < secDelta && + fabs(word0->yMax - word2->yMax) < secDelta; + break; + case 1: + case 3: + found = fabs(word0->xMin - word2->xMin) < secDelta && + fabs(word0->xMax - word2->xMax) < secDelta && + fabs(word0->yMin - word2->yMin) < priDelta && + fabs(word0->yMax - word2->yMax) < priDelta; + break; + } + } + if (found) { + break; + } + } + if (found) { + break; + } + } + if (found) { + if (word1) { + word1->next = word2->next; + } else { + pool->setPool(idx1, word2->next); + } + delete word2; + } else { + word0 = word0->next; + } + } + } + + // build the lines + curLine = NULL; + poolMinBaseIdx = pool->minBaseIdx; + charCount = 0; + nLines = 0; + while (1) { + + // find the first non-empty line in the pool + for (; + poolMinBaseIdx <= pool->maxBaseIdx && !pool->getPool(poolMinBaseIdx); + ++poolMinBaseIdx) ; + if (poolMinBaseIdx > pool->maxBaseIdx) { + break; + } + + // look for the left-most word in the first four lines of the + // pool -- this avoids starting with a superscript word + startBaseIdx = poolMinBaseIdx; + for (baseIdx = poolMinBaseIdx + 1; + baseIdx < poolMinBaseIdx + 4 && baseIdx <= pool->maxBaseIdx; + ++baseIdx) { + if (!pool->getPool(baseIdx)) { + continue; + } + if (pool->getPool(baseIdx)->primaryCmp(pool->getPool(startBaseIdx)) + < 0) { + startBaseIdx = baseIdx; + } + } + + // create a new line + word0 = pool->getPool(startBaseIdx); + pool->setPool(startBaseIdx, word0->next); + word0->next = NULL; + line = new TextLine(this, word0->rot, word0->base); + line->addWord(word0); + lastWord = word0; + + // compute the search range + fontSize = word0->fontSize; + minBase = word0->base - maxIntraLineDelta * fontSize; + maxBase = word0->base + maxIntraLineDelta * fontSize; + minBaseIdx = pool->getBaseIdx(minBase); + maxBaseIdx = pool->getBaseIdx(maxBase); + + // find the rest of the words in this line + while (1) { + + // find the left-most word whose baseline is in the range for + // this line + bestWordBaseIdx = 0; + bestWord0 = bestWord1 = NULL; + for (baseIdx = minBaseIdx; baseIdx <= maxBaseIdx; ++baseIdx) { + for (word0 = NULL, word1 = pool->getPool(baseIdx); + word1; + word0 = word1, word1 = word1->next) { + if (word1->base >= minBase && + word1->base <= maxBase && + (delta = lastWord->primaryDelta(word1)) >= + minCharSpacing * fontSize) { + if (delta < maxWordSpacing * fontSize && + (!bestWord1 || word1->primaryCmp(bestWord1) < 0)) { + bestWordBaseIdx = baseIdx; + bestWord0 = word0; + bestWord1 = word1; + } + break; + } + } + } + if (!bestWord1) { + break; + } + + // remove it from the pool, and add it to the line + if (bestWord0) { + bestWord0->next = bestWord1->next; + } else { + pool->setPool(bestWordBaseIdx, bestWord1->next); + } + bestWord1->next = NULL; + line->addWord(bestWord1); + lastWord = bestWord1; + } + + // add the line + if (curLine && line->cmpYX(curLine) > 0) { + line0 = curLine; + line1 = curLine->next; + } else { + line0 = NULL; + line1 = lines; + } + for (; + line1 && line->cmpYX(line1) > 0; + line0 = line1, line1 = line1->next) ; + if (line0) { + line0->next = line; + } else { + lines = line; + } + line->next = line1; + curLine = line; + line->coalesce(uMap); + charCount += line->len; + ++nLines; + } + + // sort lines into xy order for column assignment + lineArray = (TextLine **)gmallocn(nLines, sizeof(TextLine *)); + for (line = lines, i = 0; line; line = line->next, ++i) { + lineArray[i] = line; + } + qsort(lineArray, nLines, sizeof(TextLine *), &TextLine::cmpXY); + + // column assignment + nColumns = 0; + for (i = 0; i < nLines; ++i) { + line0 = lineArray[i]; + col1 = 0; + for (j = 0; j < i; ++j) { + line1 = lineArray[j]; + if (line1->primaryDelta(line0) >= 0) { + col2 = line1->col[line1->len] + 1; + } else { + k = 0; // make gcc happy + switch (rot) { + case 0: + for (k = 0; + k < line1->len && + line0->xMin >= 0.5 * (line1->edge[k] + line1->edge[k+1]); + ++k) ; + break; + case 1: + for (k = 0; + k < line1->len && + line0->yMin >= 0.5 * (line1->edge[k] + line1->edge[k+1]); + ++k) ; + break; + case 2: + for (k = 0; + k < line1->len && + line0->xMax <= 0.5 * (line1->edge[k] + line1->edge[k+1]); + ++k) ; + break; + case 3: + for (k = 0; + k < line1->len && + line0->yMax <= 0.5 * (line1->edge[k] + line1->edge[k+1]); + ++k) ; + break; + } + col2 = line1->col[k]; + } + if (col2 > col1) { + col1 = col2; + } + } + for (k = 0; k <= line0->len; ++k) { + line0->col[k] += col1; + } + if (line0->col[line0->len] > nColumns) { + nColumns = line0->col[line0->len]; + } + } + gfree(lineArray); +} + +void TextBlock::updatePriMinMax(TextBlock *blk) { + double newPriMin, newPriMax; + GBool gotPriMin, gotPriMax; + + gotPriMin = gotPriMax = gFalse; + newPriMin = newPriMax = 0; // make gcc happy + switch (page->primaryRot) { + case 0: + case 2: + if (blk->yMin < yMax && blk->yMax > yMin) { + if (blk->xMin < xMin) { + newPriMin = blk->xMax; + gotPriMin = gTrue; + } + if (blk->xMax > xMax) { + newPriMax = blk->xMin; + gotPriMax = gTrue; + } + } + break; + case 1: + case 3: + if (blk->xMin < xMax && blk->xMax > xMin) { + if (blk->yMin < yMin) { + newPriMin = blk->yMax; + gotPriMin = gTrue; + } + if (blk->yMax > yMax) { + newPriMax = blk->yMin; + gotPriMax = gTrue; + } + } + break; + } + if (gotPriMin) { + if (newPriMin > xMin) { + newPriMin = xMin; + } + if (newPriMin > priMin) { + priMin = newPriMin; + } + } + if (gotPriMax) { + if (newPriMax < xMax) { + newPriMax = xMax; + } + if (newPriMax < priMax) { + priMax = newPriMax; + } + } +} + +int TextBlock::cmpXYPrimaryRot(const void *p1, const void *p2) { + TextBlock *blk1 = *(TextBlock **)p1; + TextBlock *blk2 = *(TextBlock **)p2; + double cmp; + + cmp = 0; // make gcc happy + switch (blk1->page->primaryRot) { + case 0: + if ((cmp = blk1->xMin - blk2->xMin) == 0) { + cmp = blk1->yMin - blk2->yMin; + } + break; + case 1: + if ((cmp = blk1->yMin - blk2->yMin) == 0) { + cmp = blk2->xMax - blk1->xMax; + } + break; + case 2: + if ((cmp = blk2->xMax - blk1->xMax) == 0) { + cmp = blk2->yMin - blk1->yMin; + } + break; + case 3: + if ((cmp = blk2->yMax - blk1->yMax) == 0) { + cmp = blk1->xMax - blk2->xMax; + } + break; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; +} + +int TextBlock::cmpYXPrimaryRot(const void *p1, const void *p2) { + TextBlock *blk1 = *(TextBlock **)p1; + TextBlock *blk2 = *(TextBlock **)p2; + double cmp; + + cmp = 0; // make gcc happy + switch (blk1->page->primaryRot) { + case 0: + if ((cmp = blk1->yMin - blk2->yMin) == 0) { + cmp = blk1->xMin - blk2->xMin; + } + break; + case 1: + if ((cmp = blk2->xMax - blk1->xMax) == 0) { + cmp = blk1->yMin - blk2->yMin; + } + break; + case 2: + if ((cmp = blk2->yMin - blk1->yMin) == 0) { + cmp = blk2->xMax - blk1->xMax; + } + break; + case 3: + if ((cmp = blk1->xMax - blk2->xMax) == 0) { + cmp = blk2->yMax - blk1->yMax; + } + break; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; +} + +int TextBlock::primaryCmp(TextBlock *blk) { + double cmp; + + cmp = 0; // make gcc happy + switch (rot) { + case 0: + cmp = xMin - blk->xMin; + break; + case 1: + cmp = yMin - blk->yMin; + break; + case 2: + cmp = blk->xMax - xMax; + break; + case 3: + cmp = blk->yMax - yMax; + break; + } + return cmp < 0 ? -1 : cmp > 0 ? 1 : 0; +} + +double TextBlock::secondaryDelta(TextBlock *blk) { + double delta; + + delta = 0; // make gcc happy + switch (rot) { + case 0: + delta = blk->yMin - yMax; + break; + case 1: + delta = xMin - blk->xMax; + break; + case 2: + delta = yMin - blk->yMax; + break; + case 3: + delta = blk->xMin - xMax; + break; + } + return delta; +} + +GBool TextBlock::isBelow(TextBlock *blk) { + GBool below; + + below = gFalse; // make gcc happy + switch (page->primaryRot) { + case 0: + below = xMin >= blk->priMin && xMax <= blk->priMax && + yMin > blk->yMin; + break; + case 1: + below = yMin >= blk->priMin && yMax <= blk->priMax && + xMax < blk->xMax; + break; + case 2: + below = xMin >= blk->priMin && xMax <= blk->priMax && + yMax < blk->yMax; + break; + case 3: + below = yMin >= blk->priMin && yMax <= blk->priMax && + xMin > blk->xMin; + break; + } + + return below; +} + +//------------------------------------------------------------------------ +// TextFlow +//------------------------------------------------------------------------ + +TextFlow::TextFlow(TextPage *pageA, TextBlock *blk) { + page = pageA; + xMin = blk->xMin; + xMax = blk->xMax; + yMin = blk->yMin; + yMax = blk->yMax; + priMin = blk->priMin; + priMax = blk->priMax; + blocks = lastBlk = blk; + next = NULL; +} + +TextFlow::~TextFlow() { + TextBlock *blk; + + while (blocks) { + blk = blocks; + blocks = blocks->next; + delete blk; + } +} + +void TextFlow::addBlock(TextBlock *blk) { + if (lastBlk) { + lastBlk->next = blk; + } else { + blocks = blk; + } + lastBlk = blk; + if (blk->xMin < xMin) { + xMin = blk->xMin; + } + if (blk->xMax > xMax) { + xMax = blk->xMax; + } + if (blk->yMin < yMin) { + yMin = blk->yMin; + } + if (blk->yMax > yMax) { + yMax = blk->yMax; + } +} + +GBool TextFlow::blockFits(TextBlock *blk, TextBlock * /*prevBlk*/) { + GBool fits; + + // lower blocks must use smaller fonts + if (blk->lines->words->fontSize > lastBlk->lines->words->fontSize) { + return gFalse; + } + + fits = gFalse; // make gcc happy + switch (page->primaryRot) { + case 0: + fits = blk->xMin >= priMin && blk->xMax <= priMax; + break; + case 1: + fits = blk->yMin >= priMin && blk->yMax <= priMax; + break; + case 2: + fits = blk->xMin >= priMin && blk->xMax <= priMax; + break; + case 3: + fits = blk->yMin >= priMin && blk->yMax <= priMax; + break; + } + return fits; +} + +#if TEXTOUT_WORD_LIST + +//------------------------------------------------------------------------ +// TextWordList +//------------------------------------------------------------------------ + +TextWordList::TextWordList(TextPage *text, GBool physLayout) { + TextFlow *flow; + TextBlock *blk; + TextLine *line; + TextWord *word; + TextWord **wordArray; + int nWords, i; + + words = new GList(); + + if (text->rawOrder) { + for (word = text->rawWords; word; word = word->next) { + words->append(word); + } + + } else if (physLayout) { + // this is inefficient, but it's also the least useful of these + // three cases + nWords = 0; + for (flow = text->flows; flow; flow = flow->next) { + for (blk = flow->blocks; blk; blk = blk->next) { + for (line = blk->lines; line; line = line->next) { + for (word = line->words; word; word = word->next) { + ++nWords; + } + } + } + } + wordArray = (TextWord **)gmallocn(nWords, sizeof(TextWord *)); + i = 0; + for (flow = text->flows; flow; flow = flow->next) { + for (blk = flow->blocks; blk; blk = blk->next) { + for (line = blk->lines; line; line = line->next) { + for (word = line->words; word; word = word->next) { + wordArray[i++] = word; + } + } + } + } + qsort(wordArray, nWords, sizeof(TextWord *), &TextWord::cmpYX); + for (i = 0; i < nWords; ++i) { + words->append(wordArray[i]); + } + gfree(wordArray); + + } else { + for (flow = text->flows; flow; flow = flow->next) { + for (blk = flow->blocks; blk; blk = blk->next) { + for (line = blk->lines; line; line = line->next) { + for (word = line->words; word; word = word->next) { + words->append(word); + } + } + } + } + } +} + +TextWordList::~TextWordList() { + delete words; +} + +int TextWordList::getLength() { + return words->getLength(); +} + +TextWord *TextWordList::get(int idx) { + if (idx < 0 || idx >= words->getLength()) { + return NULL; + } + return (TextWord *)words->get(idx); +} + +#endif // TEXTOUT_WORD_LIST + +//------------------------------------------------------------------------ +// TextPage +//------------------------------------------------------------------------ + +TextPage::TextPage(GBool rawOrderA) { + int rot; + + rawOrder = rawOrderA; + curWord = NULL; + charPos = 0; + curFont = NULL; + curFontSize = 0; + nest = 0; + nTinyChars = 0; + lastCharOverlap = gFalse; + if (!rawOrder) { + for (rot = 0; rot < 4; ++rot) { + pools[rot] = new TextPool(); + } + } + flows = NULL; + blocks = NULL; + rawWords = NULL; + rawLastWord = NULL; + fonts = new GList(); + lastFindXMin = lastFindYMin = 0; + haveLastFind = gFalse; + underlines = new GList(); + links = new GList(); +} + +TextPage::~TextPage() { + int rot; + + clear(); + if (!rawOrder) { + for (rot = 0; rot < 4; ++rot) { + delete pools[rot]; + } + } + delete fonts; + deleteGList(underlines, TextUnderline); + deleteGList(links, TextLink); +} + +void TextPage::startPage(GfxState *state) { + clear(); + if (state) { + pageWidth = state->getPageWidth(); + pageHeight = state->getPageHeight(); + } else { + pageWidth = pageHeight = 0; + } +} + +void TextPage::endPage() { + if (curWord) { + endWord(); + } +} + +void TextPage::clear() { + int rot; + TextFlow *flow; + TextWord *word; + + if (curWord) { + delete curWord; + curWord = NULL; + } + if (rawOrder) { + while (rawWords) { + word = rawWords; + rawWords = rawWords->next; + delete word; + } + } else { + for (rot = 0; rot < 4; ++rot) { + delete pools[rot]; + } + while (flows) { + flow = flows; + flows = flows->next; + delete flow; + } + gfree(blocks); + } + deleteGList(fonts, TextFontInfo); + + curWord = NULL; + charPos = 0; + curFont = NULL; + curFontSize = 0; + nest = 0; + nTinyChars = 0; + if (!rawOrder) { + for (rot = 0; rot < 4; ++rot) { + pools[rot] = new TextPool(); + } + } + flows = NULL; + blocks = NULL; + rawWords = NULL; + rawLastWord = NULL; + fonts = new GList(); +} + +void TextPage::updateFont(GfxState *state) { + GfxFont *gfxFont; + double *fm; + char *name; + int code, mCode, letterCode, anyCode; + double w; + int i; + + // get the font info object + curFont = NULL; + for (i = 0; i < fonts->getLength(); ++i) { + curFont = (TextFontInfo *)fonts->get(i); + if (curFont->matches(state)) { + break; + } + curFont = NULL; + } + if (!curFont) { + curFont = new TextFontInfo(state); + fonts->append(curFont); + } + + // adjust the font size + gfxFont = state->getFont(); + curFontSize = state->getTransformedFontSize(); + if (gfxFont && gfxFont->getType() == fontType3) { + // This is a hack which makes it possible to deal with some Type 3 + // fonts. The problem is that it's impossible to know what the + // base coordinate system used in the font is without actually + // rendering the font. This code tries to guess by looking at the + // width of the character 'm' (which breaks if the font is a + // subset that doesn't contain 'm'). + mCode = letterCode = anyCode = -1; + for (code = 0; code < 256; ++code) { + name = ((Gfx8BitFont *)gfxFont)->getCharName(code); + if (name && name[0] == 'm' && name[1] == '\0') { + mCode = code; + } + if (letterCode < 0 && name && name[1] == '\0' && + ((name[0] >= 'A' && name[0] <= 'Z') || + (name[0] >= 'a' && name[0] <= 'z'))) { + letterCode = code; + } + if (anyCode < 0 && name && + ((Gfx8BitFont *)gfxFont)->getWidth(code) > 0) { + anyCode = code; + } + } + if (mCode >= 0 && + (w = ((Gfx8BitFont *)gfxFont)->getWidth(mCode)) > 0) { + // 0.6 is a generic average 'm' width -- yes, this is a hack + curFontSize *= w / 0.6; + } else if (letterCode >= 0 && + (w = ((Gfx8BitFont *)gfxFont)->getWidth(letterCode)) > 0) { + // even more of a hack: 0.5 is a generic letter width + curFontSize *= w / 0.5; + } else if (anyCode >= 0 && + (w = ((Gfx8BitFont *)gfxFont)->getWidth(anyCode)) > 0) { + // better than nothing: 0.5 is a generic character width + curFontSize *= w / 0.5; + } + fm = gfxFont->getFontMatrix(); + if (fm[0] != 0) { + curFontSize *= fabs(fm[3] / fm[0]); + } + } +} + +void TextPage::beginWord(GfxState *state, double x0, double y0) { + double *fontm; + double m[4], m2[4]; + int rot; + + // This check is needed because Type 3 characters can contain + // text-drawing operations (when TextPage is being used via + // {X,Win}SplashOutputDev rather than TextOutputDev). + if (curWord) { + ++nest; + return; + } + + // compute the rotation + state->getFontTransMat(&m[0], &m[1], &m[2], &m[3]); + if (state->getFont()->getType() == fontType3) { + fontm = state->getFont()->getFontMatrix(); + m2[0] = fontm[0] * m[0] + fontm[1] * m[2]; + m2[1] = fontm[0] * m[1] + fontm[1] * m[3]; + m2[2] = fontm[2] * m[0] + fontm[3] * m[2]; + m2[3] = fontm[2] * m[1] + fontm[3] * m[3]; + m[0] = m2[0]; + m[1] = m2[1]; + m[2] = m2[2]; + m[3] = m2[3]; + } + if (fabs(m[0] * m[3]) > fabs(m[1] * m[2])) { + rot = (m[3] < 0) ? 0 : 2; + } else { + rot = (m[2] > 0) ? 1 : 3; + } + + curWord = new TextWord(state, rot, x0, y0, charPos, curFont, curFontSize); +} + +void TextPage::addChar(GfxState *state, double x, double y, + double dx, double dy, + CharCode c, int nBytes, Unicode *u, int uLen) { + double x1, y1, w1, h1, dx2, dy2, base, sp, delta; + GBool overlap; + int i; + + // subtract char and word spacing from the dx,dy values + sp = state->getCharSpace(); + if (c == (CharCode)0x20) { + sp += state->getWordSpace(); + } + state->textTransformDelta(sp * state->getHorizScaling(), 0, &dx2, &dy2); + dx -= dx2; + dy -= dy2; + state->transformDelta(dx, dy, &w1, &h1); + + // throw away chars that aren't inside the page bounds + // (and also do a sanity check on the character size) + state->transform(x, y, &x1, &y1); + if (x1 + w1 < 0 || x1 > pageWidth || + y1 + h1 < 0 || y1 > pageHeight || + w1 > pageWidth || h1 > pageHeight) { + charPos += nBytes; + return; + } + + // check the tiny chars limit + if (!globalParams->getTextKeepTinyChars() && + fabs(w1) < 3 && fabs(h1) < 3) { + if (++nTinyChars > 50000) { + charPos += nBytes; + return; + } + } + + // break words at space character + if (uLen == 1 && u[0] == (Unicode)0x20) { + if (curWord) { + ++curWord->charLen; + } + charPos += nBytes; + endWord(); + return; + } + + // start a new word if: + // (1) this character doesn't fall in the right place relative to + // the end of the previous word (this places upper and lower + // constraints on the position deltas along both the primary + // and secondary axes), or + // (2) this character overlaps the previous one (duplicated text), or + // (3) the previous character was an overlap (we want each duplicated + // character to be in a word by itself at this stage), + // (4) the font size has changed + if (curWord && curWord->len > 0) { + base = sp = delta = 0; // make gcc happy + switch (curWord->rot) { + case 0: + base = y1; + sp = x1 - curWord->xMax; + delta = x1 - curWord->edge[curWord->len - 1]; + break; + case 1: + base = x1; + sp = y1 - curWord->yMax; + delta = y1 - curWord->edge[curWord->len - 1]; + break; + case 2: + base = y1; + sp = curWord->xMin - x1; + delta = curWord->edge[curWord->len - 1] - x1; + break; + case 3: + base = x1; + sp = curWord->yMin - y1; + delta = curWord->edge[curWord->len - 1] - y1; + break; + } + overlap = fabs(delta) < dupMaxPriDelta * curWord->fontSize && + fabs(base - curWord->base) < dupMaxSecDelta * curWord->fontSize; + if (overlap || lastCharOverlap || + sp < -minDupBreakOverlap * curWord->fontSize || + sp > minWordBreakSpace * curWord->fontSize || + fabs(base - curWord->base) > 0.5 || + curFontSize != curWord->fontSize) { + endWord(); + } + lastCharOverlap = overlap; + } else { + lastCharOverlap = gFalse; + } + + if (uLen != 0) { + // start a new word if needed + if (!curWord) { + beginWord(state, x, y); + } + + // page rotation and/or transform matrices can cause text to be + // drawn in reverse order -- in this case, swap the begin/end + // coordinates and break text into individual chars + if ((curWord->rot == 0 && w1 < 0) || + (curWord->rot == 1 && h1 < 0) || + (curWord->rot == 2 && w1 > 0) || + (curWord->rot == 3 && h1 > 0)) { + endWord(); + beginWord(state, x + dx, y + dy); + x1 += w1; + y1 += h1; + w1 = -w1; + h1 = -h1; + } + + // add the characters to the current word + w1 /= uLen; + h1 /= uLen; + for (i = 0; i < uLen; ++i) { + curWord->addChar(state, x1 + i*w1, y1 + i*h1, w1, h1, u[i]); + } + } + if (curWord) { + curWord->charLen += nBytes; + } + charPos += nBytes; +} + +void TextPage::endWord() { + // This check is needed because Type 3 characters can contain + // text-drawing operations (when TextPage is being used via + // {X,Win}SplashOutputDev rather than TextOutputDev). + if (nest > 0) { + --nest; + return; + } + + if (curWord) { + addWord(curWord); + curWord = NULL; + } +} + +void TextPage::addWord(TextWord *word) { + // throw away zero-length words -- they don't have valid xMin/xMax + // values, and they're useless anyway + if (word->len == 0) { + delete word; + return; + } + + if (rawOrder) { + if (rawLastWord) { + rawLastWord->next = word; + } else { + rawWords = word; + } + rawLastWord = word; + } else { + pools[word->rot]->addWord(word); + } +} + +void TextPage::addUnderline(double x0, double y0, double x1, double y1) { + underlines->append(new TextUnderline(x0, y0, x1, y1)); +} + +void TextPage::addLink(int xMin, int yMin, int xMax, int yMax, Link *link) { + links->append(new TextLink(xMin, yMin, xMax, yMax, link)); +} + +void TextPage::coalesce(GBool /*physLayout*/, GBool doHTML) { + UnicodeMap *uMap; + TextPool *pool; + TextWord *word0, *word1, *word2; + TextLine *line; + TextBlock *blkList, *blkStack, *blk, *lastBlk, *blk0, *blk1; + TextBlock **blkArray; + TextFlow *flow, *lastFlow; + TextUnderline *underline; + TextLink *link; + int rot, poolMinBaseIdx, baseIdx, startBaseIdx, endBaseIdx; + double minBase, maxBase, newMinBase, newMaxBase; + double fontSize, colSpace1, colSpace2, lineSpace, intraLineSpace, blkSpace; + GBool found; + int count[4]; + int lrCount; + int firstBlkIdx, nBlocksLeft; + int col1, col2; + int i, j, n; + + if (rawOrder) { + primaryRot = 0; + primaryLR = gTrue; + return; + } + + uMap = globalParams->getTextEncoding(); + blkList = NULL; + lastBlk = NULL; + nBlocks = 0; + primaryRot = -1; + +#if 0 // for debugging + printf("*** initial words ***\n"); + for (rot = 0; rot < 4; ++rot) { + pool = pools[rot]; + for (baseIdx = pool->minBaseIdx; baseIdx <= pool->maxBaseIdx; ++baseIdx) { + for (word0 = pool->getPool(baseIdx); word0; word0 = word0->next) { + printf(" word: x=%.2f..%.2f y=%.2f..%.2f base=%.2f fontSize=%.2f rot=%d link=%p '", + word0->xMin, word0->xMax, word0->yMin, word0->yMax, + word0->base, word0->fontSize, rot*90, word0->link); + for (i = 0; i < word0->len; ++i) { + fputc(word0->text[i] & 0xff, stdout); + } + printf("'\n"); + } + } + } + printf("\n"); +#endif + +#if 0 //~ for debugging + for (i = 0; i < underlines->getLength(); ++i) { + underline = (TextUnderline *)underlines->get(i); + printf("underline: x=%g..%g y=%g..%g horiz=%d\n", + underline->x0, underline->x1, underline->y0, underline->y1, + underline->horiz); + } +#endif + + if (doHTML) { + + //----- handle underlining + for (i = 0; i < underlines->getLength(); ++i) { + underline = (TextUnderline *)underlines->get(i); + if (underline->horiz) { + // rot = 0 + if (pools[0]->minBaseIdx <= pools[0]->maxBaseIdx) { + startBaseIdx = pools[0]->getBaseIdx(underline->y0 + minUnderlineGap); + endBaseIdx = pools[0]->getBaseIdx(underline->y0 + maxUnderlineGap); + for (j = startBaseIdx; j <= endBaseIdx; ++j) { + for (word0 = pools[0]->getPool(j); word0; word0 = word0->next) { + //~ need to check the y value against the word baseline + if (underline->x0 < word0->xMin + underlineSlack && + word0->xMax - underlineSlack < underline->x1) { + word0->underlined = gTrue; + } + } + } + } + + // rot = 2 + if (pools[2]->minBaseIdx <= pools[2]->maxBaseIdx) { + startBaseIdx = pools[2]->getBaseIdx(underline->y0 - maxUnderlineGap); + endBaseIdx = pools[2]->getBaseIdx(underline->y0 - minUnderlineGap); + for (j = startBaseIdx; j <= endBaseIdx; ++j) { + for (word0 = pools[2]->getPool(j); word0; word0 = word0->next) { + if (underline->x0 < word0->xMin + underlineSlack && + word0->xMax - underlineSlack < underline->x1) { + word0->underlined = gTrue; + } + } + } + } + } else { + // rot = 1 + if (pools[1]->minBaseIdx <= pools[1]->maxBaseIdx) { + startBaseIdx = pools[1]->getBaseIdx(underline->x0 - maxUnderlineGap); + endBaseIdx = pools[1]->getBaseIdx(underline->x0 - minUnderlineGap); + for (j = startBaseIdx; j <= endBaseIdx; ++j) { + for (word0 = pools[1]->getPool(j); word0; word0 = word0->next) { + if (underline->y0 < word0->yMin + underlineSlack && + word0->yMax - underlineSlack < underline->y1) { + word0->underlined = gTrue; + } + } + } + } + + // rot = 3 + if (pools[3]->minBaseIdx <= pools[3]->maxBaseIdx) { + startBaseIdx = pools[3]->getBaseIdx(underline->x0 + minUnderlineGap); + endBaseIdx = pools[3]->getBaseIdx(underline->x0 + maxUnderlineGap); + for (j = startBaseIdx; j <= endBaseIdx; ++j) { + for (word0 = pools[3]->getPool(j); word0; word0 = word0->next) { + if (underline->y0 < word0->yMin + underlineSlack && + word0->yMax - underlineSlack < underline->y1) { + word0->underlined = gTrue; + } + } + } + } + } + } + + //----- handle links + for (i = 0; i < links->getLength(); ++i) { + link = (TextLink *)links->get(i); + + // rot = 0 + if (pools[0]->minBaseIdx <= pools[0]->maxBaseIdx) { + startBaseIdx = pools[0]->getBaseIdx(link->yMin); + endBaseIdx = pools[0]->getBaseIdx(link->yMax); + for (j = startBaseIdx; j <= endBaseIdx; ++j) { + for (word0 = pools[0]->getPool(j); word0; word0 = word0->next) { + if (link->xMin < word0->xMin + hyperlinkSlack && + word0->xMax - hyperlinkSlack < link->xMax && + link->yMin < word0->yMin + hyperlinkSlack && + word0->yMax - hyperlinkSlack < link->yMax) { + word0->link = link->link; + } + } + } + } + + // rot = 2 + if (pools[2]->minBaseIdx <= pools[2]->maxBaseIdx) { + startBaseIdx = pools[2]->getBaseIdx(link->yMin); + endBaseIdx = pools[2]->getBaseIdx(link->yMax); + for (j = startBaseIdx; j <= endBaseIdx; ++j) { + for (word0 = pools[2]->getPool(j); word0; word0 = word0->next) { + if (link->xMin < word0->xMin + hyperlinkSlack && + word0->xMax - hyperlinkSlack < link->xMax && + link->yMin < word0->yMin + hyperlinkSlack && + word0->yMax - hyperlinkSlack < link->yMax) { + word0->link = link->link; + } + } + } + } + + // rot = 1 + if (pools[1]->minBaseIdx <= pools[1]->maxBaseIdx) { + startBaseIdx = pools[1]->getBaseIdx(link->xMin); + endBaseIdx = pools[1]->getBaseIdx(link->xMax); + for (j = startBaseIdx; j <= endBaseIdx; ++j) { + for (word0 = pools[1]->getPool(j); word0; word0 = word0->next) { + if (link->yMin < word0->yMin + hyperlinkSlack && + word0->yMax - hyperlinkSlack < link->yMax && + link->xMin < word0->xMin + hyperlinkSlack && + word0->xMax - hyperlinkSlack < link->xMax) { + word0->link = link->link; + } + } + } + } + + // rot = 3 + if (pools[3]->minBaseIdx <= pools[3]->maxBaseIdx) { + startBaseIdx = pools[3]->getBaseIdx(link->xMin); + endBaseIdx = pools[3]->getBaseIdx(link->xMax); + for (j = startBaseIdx; j <= endBaseIdx; ++j) { + for (word0 = pools[3]->getPool(j); word0; word0 = word0->next) { + if (link->yMin < word0->yMin + hyperlinkSlack && + word0->yMax - hyperlinkSlack < link->yMax && + link->xMin < word0->xMin + hyperlinkSlack && + word0->xMax - hyperlinkSlack < link->xMax) { + word0->link = link->link; + } + } + } + } + } + } + + //----- assemble the blocks + + //~ add an outer loop for writing mode (vertical text) + + // build blocks for each rotation value + for (rot = 0; rot < 4; ++rot) { + pool = pools[rot]; + poolMinBaseIdx = pool->minBaseIdx; + count[rot] = 0; + + // add blocks until no more words are left + while (1) { + + // find the first non-empty line in the pool + for (; + poolMinBaseIdx <= pool->maxBaseIdx && + !pool->getPool(poolMinBaseIdx); + ++poolMinBaseIdx) ; + if (poolMinBaseIdx > pool->maxBaseIdx) { + break; + } + + // look for the left-most word in the first four lines of the + // pool -- this avoids starting with a superscript word + startBaseIdx = poolMinBaseIdx; + for (baseIdx = poolMinBaseIdx + 1; + baseIdx < poolMinBaseIdx + 4 && baseIdx <= pool->maxBaseIdx; + ++baseIdx) { + if (!pool->getPool(baseIdx)) { + continue; + } + if (pool->getPool(baseIdx)->primaryCmp(pool->getPool(startBaseIdx)) + < 0) { + startBaseIdx = baseIdx; + } + } + + // create a new block + word0 = pool->getPool(startBaseIdx); + pool->setPool(startBaseIdx, word0->next); + word0->next = NULL; + blk = new TextBlock(this, rot); + blk->addWord(word0); + + fontSize = word0->fontSize; + minBase = maxBase = word0->base; + colSpace1 = minColSpacing1 * fontSize; + colSpace2 = minColSpacing2 * fontSize; + lineSpace = maxLineSpacingDelta * fontSize; + intraLineSpace = maxIntraLineDelta * fontSize; + + // add words to the block + do { + found = gFalse; + + // look for words on the line above the current top edge of + // the block + newMinBase = minBase; + for (baseIdx = pool->getBaseIdx(minBase); + baseIdx >= pool->getBaseIdx(minBase - lineSpace); + --baseIdx) { + word0 = NULL; + word1 = pool->getPool(baseIdx); + while (word1) { + if (word1->base < minBase && + word1->base >= minBase - lineSpace && + ((rot == 0 || rot == 2) + ? (word1->xMin < blk->xMax && word1->xMax > blk->xMin) + : (word1->yMin < blk->yMax && word1->yMax > blk->yMin)) && + fabs(word1->fontSize - fontSize) < + maxBlockFontSizeDelta1 * fontSize) { + word2 = word1; + if (word0) { + word0->next = word1->next; + } else { + pool->setPool(baseIdx, word1->next); + } + word1 = word1->next; + word2->next = NULL; + blk->addWord(word2); + found = gTrue; + newMinBase = word2->base; + } else { + word0 = word1; + word1 = word1->next; + } + } + } + minBase = newMinBase; + + // look for words on the line below the current bottom edge of + // the block + newMaxBase = maxBase; + for (baseIdx = pool->getBaseIdx(maxBase); + baseIdx <= pool->getBaseIdx(maxBase + lineSpace); + ++baseIdx) { + word0 = NULL; + word1 = pool->getPool(baseIdx); + while (word1) { + if (word1->base > maxBase && + word1->base <= maxBase + lineSpace && + ((rot == 0 || rot == 2) + ? (word1->xMin < blk->xMax && word1->xMax > blk->xMin) + : (word1->yMin < blk->yMax && word1->yMax > blk->yMin)) && + fabs(word1->fontSize - fontSize) < + maxBlockFontSizeDelta1 * fontSize) { + word2 = word1; + if (word0) { + word0->next = word1->next; + } else { + pool->setPool(baseIdx, word1->next); + } + word1 = word1->next; + word2->next = NULL; + blk->addWord(word2); + found = gTrue; + newMaxBase = word2->base; + } else { + word0 = word1; + word1 = word1->next; + } + } + } + maxBase = newMaxBase; + + // look for words that are on lines already in the block, and + // that overlap the block horizontally + for (baseIdx = pool->getBaseIdx(minBase - intraLineSpace); + baseIdx <= pool->getBaseIdx(maxBase + intraLineSpace); + ++baseIdx) { + word0 = NULL; + word1 = pool->getPool(baseIdx); + while (word1) { + if (word1->base >= minBase - intraLineSpace && + word1->base <= maxBase + intraLineSpace && + ((rot == 0 || rot == 2) + ? (word1->xMin < blk->xMax + colSpace1 && + word1->xMax > blk->xMin - colSpace1) + : (word1->yMin < blk->yMax + colSpace1 && + word1->yMax > blk->yMin - colSpace1)) && + fabs(word1->fontSize - fontSize) < + maxBlockFontSizeDelta2 * fontSize) { + word2 = word1; + if (word0) { + word0->next = word1->next; + } else { + pool->setPool(baseIdx, word1->next); + } + word1 = word1->next; + word2->next = NULL; + blk->addWord(word2); + found = gTrue; + } else { + word0 = word1; + word1 = word1->next; + } + } + } + + // only check for outlying words (the next two chunks of code) + // if we didn't find anything else + if (found) { + continue; + } + + // scan down the left side of the block, looking for words + // that are near (but not overlapping) the block; if there are + // three or fewer, add them to the block + n = 0; + for (baseIdx = pool->getBaseIdx(minBase - intraLineSpace); + baseIdx <= pool->getBaseIdx(maxBase + intraLineSpace); + ++baseIdx) { + word1 = pool->getPool(baseIdx); + while (word1) { + if (word1->base >= minBase - intraLineSpace && + word1->base <= maxBase + intraLineSpace && + ((rot == 0 || rot == 2) + ? (word1->xMax <= blk->xMin && + word1->xMax > blk->xMin - colSpace2) + : (word1->yMax <= blk->yMin && + word1->yMax > blk->yMin - colSpace2)) && + fabs(word1->fontSize - fontSize) < + maxBlockFontSizeDelta3 * fontSize) { + ++n; + break; + } + word1 = word1->next; + } + } + if (n > 0 && n <= 3) { + for (baseIdx = pool->getBaseIdx(minBase - intraLineSpace); + baseIdx <= pool->getBaseIdx(maxBase + intraLineSpace); + ++baseIdx) { + word0 = NULL; + word1 = pool->getPool(baseIdx); + while (word1) { + if (word1->base >= minBase - intraLineSpace && + word1->base <= maxBase + intraLineSpace && + ((rot == 0 || rot == 2) + ? (word1->xMax <= blk->xMin && + word1->xMax > blk->xMin - colSpace2) + : (word1->yMax <= blk->yMin && + word1->yMax > blk->yMin - colSpace2)) && + fabs(word1->fontSize - fontSize) < + maxBlockFontSizeDelta3 * fontSize) { + word2 = word1; + if (word0) { + word0->next = word1->next; + } else { + pool->setPool(baseIdx, word1->next); + } + word1 = word1->next; + word2->next = NULL; + blk->addWord(word2); + if (word2->base < minBase) { + minBase = word2->base; + } else if (word2->base > maxBase) { + maxBase = word2->base; + } + found = gTrue; + break; + } else { + word0 = word1; + word1 = word1->next; + } + } + } + } + + // scan down the right side of the block, looking for words + // that are near (but not overlapping) the block; if there are + // three or fewer, add them to the block + n = 0; + for (baseIdx = pool->getBaseIdx(minBase - intraLineSpace); + baseIdx <= pool->getBaseIdx(maxBase + intraLineSpace); + ++baseIdx) { + word1 = pool->getPool(baseIdx); + while (word1) { + if (word1->base >= minBase - intraLineSpace && + word1->base <= maxBase + intraLineSpace && + ((rot == 0 || rot == 2) + ? (word1->xMin >= blk->xMax && + word1->xMin < blk->xMax + colSpace2) + : (word1->yMin >= blk->yMax && + word1->yMin < blk->yMax + colSpace2)) && + fabs(word1->fontSize - fontSize) < + maxBlockFontSizeDelta3 * fontSize) { + ++n; + break; + } + word1 = word1->next; + } + } + if (n > 0 && n <= 3) { + for (baseIdx = pool->getBaseIdx(minBase - intraLineSpace); + baseIdx <= pool->getBaseIdx(maxBase + intraLineSpace); + ++baseIdx) { + word0 = NULL; + word1 = pool->getPool(baseIdx); + while (word1) { + if (word1->base >= minBase - intraLineSpace && + word1->base <= maxBase + intraLineSpace && + ((rot == 0 || rot == 2) + ? (word1->xMin >= blk->xMax && + word1->xMin < blk->xMax + colSpace2) + : (word1->yMin >= blk->yMax && + word1->yMin < blk->yMax + colSpace2)) && + fabs(word1->fontSize - fontSize) < + maxBlockFontSizeDelta3 * fontSize) { + word2 = word1; + if (word0) { + word0->next = word1->next; + } else { + pool->setPool(baseIdx, word1->next); + } + word1 = word1->next; + word2->next = NULL; + blk->addWord(word2); + if (word2->base < minBase) { + minBase = word2->base; + } else if (word2->base > maxBase) { + maxBase = word2->base; + } + found = gTrue; + break; + } else { + word0 = word1; + word1 = word1->next; + } + } + } + } + + } while (found); + + //~ need to compute the primary writing mode (horiz/vert) in + //~ addition to primary rotation + + // coalesce the block, and add it to the list + blk->coalesce(uMap); + if (lastBlk) { + lastBlk->next = blk; + } else { + blkList = blk; + } + lastBlk = blk; + count[rot] += blk->charCount; + if (primaryRot < 0 || count[rot] > count[primaryRot]) { + primaryRot = rot; + } + ++nBlocks; + } + } + +#if 0 // for debugging + printf("*** rotation ***\n"); + for (rot = 0; rot < 4; ++rot) { + printf(" %d: %6d\n", rot, count[rot]); + } + printf(" primary rot = %d\n", primaryRot); + printf("\n"); +#endif + +#if 0 // for debugging + printf("*** blocks ***\n"); + for (blk = blkList; blk; blk = blk->next) { + printf("block: rot=%d x=%.2f..%.2f y=%.2f..%.2f\n", + blk->rot, blk->xMin, blk->xMax, blk->yMin, blk->yMax); + for (line = blk->lines; line; line = line->next) { + printf(" line: x=%.2f..%.2f y=%.2f..%.2f base=%.2f\n", + line->xMin, line->xMax, line->yMin, line->yMax, line->base); + for (word0 = line->words; word0; word0 = word0->next) { + printf(" word: x=%.2f..%.2f y=%.2f..%.2f base=%.2f fontSize=%.2f space=%d: '", + word0->xMin, word0->xMax, word0->yMin, word0->yMax, + word0->base, word0->fontSize, word0->spaceAfter); + for (i = 0; i < word0->len; ++i) { + fputc(word0->text[i] & 0xff, stdout); + } + printf("'\n"); + } + } + } + printf("\n"); +#endif + + // determine the primary direction + lrCount = 0; + for (blk = blkList; blk; blk = blk->next) { + for (line = blk->lines; line; line = line->next) { + for (word0 = line->words; word0; word0 = word0->next) { + for (i = 0; i < word0->len; ++i) { + if (unicodeTypeL(word0->text[i])) { + ++lrCount; + } else if (unicodeTypeR(word0->text[i])) { + --lrCount; + } + } + } + } + } + primaryLR = lrCount >= 0; + +#if 0 // for debugging + printf("*** direction ***\n"); + printf("lrCount = %d\n", lrCount); + printf("primaryLR = %d\n", primaryLR); +#endif + + //----- column assignment + + // sort blocks into xy order for column assignment + blocks = (TextBlock **)gmallocn(nBlocks, sizeof(TextBlock *)); + for (blk = blkList, i = 0; blk; blk = blk->next, ++i) { + blocks[i] = blk; + } + qsort(blocks, nBlocks, sizeof(TextBlock *), &TextBlock::cmpXYPrimaryRot); + + // column assignment + for (i = 0; i < nBlocks; ++i) { + blk0 = blocks[i]; + col1 = 0; + for (j = 0; j < i; ++j) { + blk1 = blocks[j]; + col2 = 0; // make gcc happy + switch (primaryRot) { + case 0: + if (blk0->xMin > blk1->xMax) { + col2 = blk1->col + blk1->nColumns + 3; + } else if (blk1->xMax == blk1->xMin) { + col2 = blk1->col; + } else { + col2 = blk1->col + (int)(((blk0->xMin - blk1->xMin) / + (blk1->xMax - blk1->xMin)) * + blk1->nColumns); + } + break; + case 1: + if (blk0->yMin > blk1->yMax) { + col2 = blk1->col + blk1->nColumns + 3; + } else if (blk1->yMax == blk1->yMin) { + col2 = blk1->col; + } else { + col2 = blk1->col + (int)(((blk0->yMin - blk1->yMin) / + (blk1->yMax - blk1->yMin)) * + blk1->nColumns); + } + break; + case 2: + if (blk0->xMax < blk1->xMin) { + col2 = blk1->col + blk1->nColumns + 3; + } else if (blk1->xMin == blk1->xMax) { + col2 = blk1->col; + } else { + col2 = blk1->col + (int)(((blk0->xMax - blk1->xMax) / + (blk1->xMin - blk1->xMax)) * + blk1->nColumns); + } + break; + case 3: + if (blk0->yMax < blk1->yMin) { + col2 = blk1->col + blk1->nColumns + 3; + } else if (blk1->yMin == blk1->yMax) { + col2 = blk1->col; + } else { + col2 = blk1->col + (int)(((blk0->yMax - blk1->yMax) / + (blk1->yMin - blk1->yMax)) * + blk1->nColumns); + } + break; + } + if (col2 > col1) { + col1 = col2; + } + } + blk0->col = col1; + for (line = blk0->lines; line; line = line->next) { + for (j = 0; j <= line->len; ++j) { + line->col[j] += col1; + } + } + } + +#if 0 // for debugging + printf("*** blocks, after column assignment ***\n"); + for (blk = blkList; blk; blk = blk->next) { + printf("block: rot=%d x=%.2f..%.2f y=%.2f..%.2f col=%d nCols=%d\n", + blk->rot, blk->xMin, blk->xMax, blk->yMin, blk->yMax, blk->col, + blk->nColumns); + for (line = blk->lines; line; line = line->next) { + printf(" line:\n"); + for (word0 = line->words; word0; word0 = word0->next) { + printf(" word: x=%.2f..%.2f y=%.2f..%.2f base=%.2f fontSize=%.2f space=%d: '", + word0->xMin, word0->xMax, word0->yMin, word0->yMax, + word0->base, word0->fontSize, word0->spaceAfter); + for (i = 0; i < word0->len; ++i) { + fputc(word0->text[i] & 0xff, stdout); + } + printf("'\n"); + } + } + } + printf("\n"); +#endif + + //----- reading order sort + + // sort blocks into yx order (in preparation for reading order sort) + qsort(blocks, nBlocks, sizeof(TextBlock *), &TextBlock::cmpYXPrimaryRot); + + // compute space on left and right sides of each block + for (i = 0; i < nBlocks; ++i) { + blk0 = blocks[i]; + for (j = 0; j < nBlocks; ++j) { + blk1 = blocks[j]; + if (blk1 != blk0) { + blk0->updatePriMinMax(blk1); + } + } + } + +#if 0 // for debugging + printf("*** blocks, after yx sort ***\n"); + for (i = 0; i < nBlocks; ++i) { + blk = blocks[i]; + printf("block: rot=%d x=%.2f..%.2f y=%.2f..%.2f space=%.2f..%.2f\n", + blk->rot, blk->xMin, blk->xMax, blk->yMin, blk->yMax, + blk->priMin, blk->priMax); + for (line = blk->lines; line; line = line->next) { + printf(" line:\n"); + for (word0 = line->words; word0; word0 = word0->next) { + printf(" word: x=%.2f..%.2f y=%.2f..%.2f base=%.2f fontSize=%.2f space=%d: '", + word0->xMin, word0->xMax, word0->yMin, word0->yMax, + word0->base, word0->fontSize, word0->spaceAfter); + for (j = 0; j < word0->len; ++j) { + fputc(word0->text[j] & 0xff, stdout); + } + printf("'\n"); + } + } + } + printf("\n"); +#endif + + // build the flows + //~ this needs to be adjusted for writing mode (vertical text) + //~ this also needs to account for right-to-left column ordering + blkArray = (TextBlock **)gmallocn(nBlocks, sizeof(TextBlock *)); + memcpy(blkArray, blocks, nBlocks * sizeof(TextBlock *)); + flows = lastFlow = NULL; + firstBlkIdx = 0; + nBlocksLeft = nBlocks; + while (nBlocksLeft > 0) { + + // find the upper-left-most block + for (; !blkArray[firstBlkIdx]; ++firstBlkIdx) ; + i = firstBlkIdx; + blk = blkArray[i]; + for (j = firstBlkIdx + 1; j < nBlocks; ++j) { + blk1 = blkArray[j]; + if (blk1) { + if (blk && blk->secondaryDelta(blk1) > 0) { + break; + } + if (blk1->primaryCmp(blk) < 0) { + i = j; + blk = blk1; + } + } + } + blkArray[i] = NULL; + --nBlocksLeft; + blk->next = NULL; + + // create a new flow, starting with the upper-left-most block + flow = new TextFlow(this, blk); + if (lastFlow) { + lastFlow->next = flow; + } else { + flows = flow; + } + lastFlow = flow; + fontSize = blk->lines->words->fontSize; + + // push the upper-left-most block on the stack + blk->stackNext = NULL; + blkStack = blk; + + // find the other blocks in this flow + while (blkStack) { + + // find the upper-left-most block under (but within + // maxBlockSpacing of) the top block on the stack + blkSpace = maxBlockSpacing * blkStack->lines->words->fontSize; + blk = NULL; + i = -1; + for (j = firstBlkIdx; j < nBlocks; ++j) { + blk1 = blkArray[j]; + if (blk1) { + if (blkStack->secondaryDelta(blk1) > blkSpace) { + break; + } + if (blk && blk->secondaryDelta(blk1) > 0) { + break; + } + if (blk1->isBelow(blkStack) && + (!blk || blk1->primaryCmp(blk) < 0)) { + i = j; + blk = blk1; + } + } + } + + // if a suitable block was found, add it to the flow and push it + // onto the stack + if (blk && flow->blockFits(blk, blkStack)) { + blkArray[i] = NULL; + --nBlocksLeft; + blk->next = NULL; + flow->addBlock(blk); + fontSize = blk->lines->words->fontSize; + blk->stackNext = blkStack; + blkStack = blk; + + // otherwise (if there is no block under the top block or the + // block is not suitable), pop the stack + } else { + blkStack = blkStack->stackNext; + } + } + } + gfree(blkArray); + +#if 0 // for debugging + printf("*** flows ***\n"); + for (flow = flows; flow; flow = flow->next) { + printf("flow: x=%.2f..%.2f y=%.2f..%.2f pri:%.2f..%.2f\n", + flow->xMin, flow->xMax, flow->yMin, flow->yMax, + flow->priMin, flow->priMax); + for (blk = flow->blocks; blk; blk = blk->next) { + printf(" block: rot=%d x=%.2f..%.2f y=%.2f..%.2f pri=%.2f..%.2f\n", + blk->rot, blk->xMin, blk->xMax, blk->yMin, blk->yMax, + blk->priMin, blk->priMax); + for (line = blk->lines; line; line = line->next) { + printf(" line:\n"); + for (word0 = line->words; word0; word0 = word0->next) { + printf(" word: x=%.2f..%.2f y=%.2f..%.2f base=%.2f fontSize=%.2f space=%d: '", + word0->xMin, word0->xMax, word0->yMin, word0->yMax, + word0->base, word0->fontSize, word0->spaceAfter); + for (i = 0; i < word0->len; ++i) { + fputc(word0->text[i] & 0xff, stdout); + } + printf("'\n"); + } + } + } + } + printf("\n"); +#endif + + if (uMap) { + uMap->decRefCnt(); + } +} + +GBool TextPage::findText(Unicode *s, int len, + GBool startAtTop, GBool stopAtBottom, + GBool startAtLast, GBool stopAtLast, + GBool caseSensitive, GBool backward, + double *xMin, double *yMin, + double *xMax, double *yMax) { + TextBlock *blk; + TextLine *line; + Unicode *s2, *txt; + Unicode *p; + int txtSize, m, i, j, k; + double xStart, yStart, xStop, yStop; + double xMin0, yMin0, xMax0, yMax0; + double xMin1, yMin1, xMax1, yMax1; + GBool found; + + //~ needs to handle right-to-left text + + if (rawOrder) { + return gFalse; + } + + // convert the search string to uppercase + if (!caseSensitive) { + s2 = (Unicode *)gmallocn(len, sizeof(Unicode)); + for (i = 0; i < len; ++i) { + s2[i] = unicodeToUpper(s[i]); + } + } else { + s2 = s; + } + + txt = NULL; + txtSize = 0; + + xStart = yStart = xStop = yStop = 0; + if (startAtLast && haveLastFind) { + xStart = lastFindXMin; + yStart = lastFindYMin; + } else if (!startAtTop) { + xStart = *xMin; + yStart = *yMin; + } + if (stopAtLast && haveLastFind) { + xStop = lastFindXMin; + yStop = lastFindYMin; + } else if (!stopAtBottom) { + xStop = *xMax; + yStop = *yMax; + } + + found = gFalse; + xMin0 = xMax0 = yMin0 = yMax0 = 0; // make gcc happy + xMin1 = xMax1 = yMin1 = yMax1 = 0; // make gcc happy + + for (i = backward ? nBlocks - 1 : 0; + backward ? i >= 0 : i < nBlocks; + i += backward ? -1 : 1) { + blk = blocks[i]; + + // check: is the block above the top limit? + if (!startAtTop && (backward ? blk->yMin > yStart : blk->yMax < yStart)) { + continue; + } + + // check: is the block below the bottom limit? + if (!stopAtBottom && (backward ? blk->yMax < yStop : blk->yMin > yStop)) { + break; + } + + for (line = blk->lines; line; line = line->next) { + + // check: is the line above the top limit? + if (!startAtTop && + (backward ? line->yMin > yStart : line->yMin < yStart)) { + continue; + } + + // check: is the line below the bottom limit? + if (!stopAtBottom && + (backward ? line->yMin < yStop : line->yMin > yStop)) { + continue; + } + + // convert the line to uppercase + m = line->len; + if (!caseSensitive) { + if (m > txtSize) { + txt = (Unicode *)greallocn(txt, m, sizeof(Unicode)); + txtSize = m; + } + for (k = 0; k < m; ++k) { + txt[k] = unicodeToUpper(line->text[k]); + } + } else { + txt = line->text; + } + + // search each position in this line + j = backward ? m - len : 0; + p = txt + j; + while (backward ? j >= 0 : j <= m - len) { + + // compare the strings + for (k = 0; k < len; ++k) { + if (p[k] != s2[k]) { + break; + } + } + + // found it + if (k == len) { + switch (line->rot) { + case 0: + xMin1 = line->edge[j]; + xMax1 = line->edge[j + len]; + yMin1 = line->yMin; + yMax1 = line->yMax; + break; + case 1: + xMin1 = line->xMin; + xMax1 = line->xMax; + yMin1 = line->edge[j]; + yMax1 = line->edge[j + len]; + break; + case 2: + xMin1 = line->edge[j + len]; + xMax1 = line->edge[j]; + yMin1 = line->yMin; + yMax1 = line->yMax; + break; + case 3: + xMin1 = line->xMin; + xMax1 = line->xMax; + yMin1 = line->edge[j + len]; + yMax1 = line->edge[j]; + break; + } + if (backward) { + if ((startAtTop || + yMin1 < yStart || (yMin1 == yStart && xMin1 < xStart)) && + (stopAtBottom || + yMin1 > yStop || (yMin1 == yStop && xMin1 > xStop))) { + if (!found || + yMin1 > yMin0 || (yMin1 == yMin0 && xMin1 > xMin0)) { + xMin0 = xMin1; + xMax0 = xMax1; + yMin0 = yMin1; + yMax0 = yMax1; + found = gTrue; + } + } + } else { + if ((startAtTop || + yMin1 > yStart || (yMin1 == yStart && xMin1 > xStart)) && + (stopAtBottom || + yMin1 < yStop || (yMin1 == yStop && xMin1 < xStop))) { + if (!found || + yMin1 < yMin0 || (yMin1 == yMin0 && xMin1 < xMin0)) { + xMin0 = xMin1; + xMax0 = xMax1; + yMin0 = yMin1; + yMax0 = yMax1; + found = gTrue; + } + } + } + } + if (backward) { + --j; + --p; + } else { + ++j; + ++p; + } + } + } + } + + if (!caseSensitive) { + gfree(s2); + gfree(txt); + } + + if (found) { + *xMin = xMin0; + *xMax = xMax0; + *yMin = yMin0; + *yMax = yMax0; + lastFindXMin = xMin0; + lastFindYMin = yMin0; + haveLastFind = gTrue; + return gTrue; + } + + return gFalse; +} + +GString *TextPage::getText(double xMin, double yMin, + double xMax, double yMax) { + GString *s; + UnicodeMap *uMap; + GBool isUnicode; + TextBlock *blk; + TextLine *line; + TextLineFrag *frags; + int nFrags, fragsSize; + TextLineFrag *frag; + char space[8], eol[16]; + int spaceLen, eolLen; + int lastRot; + double x, y, delta; + int col, idx0, idx1, i, j; + GBool multiLine, oneRot; + + s = new GString(); + + if (rawOrder) { + return s; + } + + // get the output encoding + if (!(uMap = globalParams->getTextEncoding())) { + return s; + } + isUnicode = uMap->isUnicode(); + spaceLen = uMap->mapUnicode(0x20, space, sizeof(space)); + eolLen = 0; // make gcc happy + switch (globalParams->getTextEOL()) { + case eolUnix: + eolLen = uMap->mapUnicode(0x0a, eol, sizeof(eol)); + break; + case eolDOS: + eolLen = uMap->mapUnicode(0x0d, eol, sizeof(eol)); + eolLen += uMap->mapUnicode(0x0a, eol + eolLen, sizeof(eol) - eolLen); + break; + case eolMac: + eolLen = uMap->mapUnicode(0x0d, eol, sizeof(eol)); + break; + } + + //~ writing mode (horiz/vert) + + // collect the line fragments that are in the rectangle + fragsSize = 256; + frags = (TextLineFrag *)gmallocn(fragsSize, sizeof(TextLineFrag)); + nFrags = 0; + lastRot = -1; + oneRot = gTrue; + for (i = 0; i < nBlocks; ++i) { + blk = blocks[i]; + if (xMin < blk->xMax && blk->xMin < xMax && + yMin < blk->yMax && blk->yMin < yMax) { + for (line = blk->lines; line; line = line->next) { + if (xMin < line->xMax && line->xMin < xMax && + yMin < line->yMax && line->yMin < yMax) { + idx0 = idx1 = -1; + switch (line->rot) { + case 0: + y = 0.5 * (line->yMin + line->yMax); + if (yMin < y && y < yMax) { + j = 0; + while (j < line->len) { + if (0.5 * (line->edge[j] + line->edge[j+1]) > xMin) { + idx0 = j; + break; + } + ++j; + } + j = line->len - 1; + while (j >= 0) { + if (0.5 * (line->edge[j] + line->edge[j+1]) < xMax) { + idx1 = j; + break; + } + --j; + } + } + break; + case 1: + x = 0.5 * (line->xMin + line->xMax); + if (xMin < x && x < xMax) { + j = 0; + while (j < line->len) { + if (0.5 * (line->edge[j] + line->edge[j+1]) > yMin) { + idx0 = j; + break; + } + ++j; + } + j = line->len - 1; + while (j >= 0) { + if (0.5 * (line->edge[j] + line->edge[j+1]) < yMax) { + idx1 = j; + break; + } + --j; + } + } + break; + case 2: + y = 0.5 * (line->yMin + line->yMax); + if (yMin < y && y < yMax) { + j = 0; + while (j < line->len) { + if (0.5 * (line->edge[j] + line->edge[j+1]) < xMax) { + idx0 = j; + break; + } + ++j; + } + j = line->len - 1; + while (j >= 0) { + if (0.5 * (line->edge[j] + line->edge[j+1]) > xMin) { + idx1 = j; + break; + } + --j; + } + } + break; + case 3: + x = 0.5 * (line->xMin + line->xMax); + if (xMin < x && x < xMax) { + j = 0; + while (j < line->len) { + if (0.5 * (line->edge[j] + line->edge[j+1]) < yMax) { + idx0 = j; + break; + } + ++j; + } + j = line->len - 1; + while (j >= 0) { + if (0.5 * (line->edge[j] + line->edge[j+1]) > yMin) { + idx1 = j; + break; + } + --j; + } + } + break; + } + if (idx0 >= 0 && idx1 >= 0) { + if (nFrags == fragsSize) { + fragsSize *= 2; + frags = (TextLineFrag *) + greallocn(frags, fragsSize, sizeof(TextLineFrag)); + } + frags[nFrags].init(line, idx0, idx1 - idx0 + 1); + ++nFrags; + if (lastRot >= 0 && line->rot != lastRot) { + oneRot = gFalse; + } + lastRot = line->rot; + } + } + } + } + } + + // sort the fragments and generate the string + if (nFrags > 0) { + + for (i = 0; i < nFrags; ++i) { + frags[i].computeCoords(oneRot); + } + assignColumns(frags, nFrags, oneRot); + + // if all lines in the region have the same rotation, use it; + // otherwise, use the page's primary rotation + if (oneRot) { + qsort(frags, nFrags, sizeof(TextLineFrag), + &TextLineFrag::cmpYXLineRot); + } else { + qsort(frags, nFrags, sizeof(TextLineFrag), + &TextLineFrag::cmpYXPrimaryRot); + } + i = 0; + while (i < nFrags) { + delta = maxIntraLineDelta * frags[i].line->words->fontSize; + for (j = i+1; + j < nFrags && fabs(frags[j].base - frags[i].base) < delta; + ++j) ; + qsort(frags + i, j - i, sizeof(TextLineFrag), + oneRot ? &TextLineFrag::cmpXYColumnLineRot + : &TextLineFrag::cmpXYColumnPrimaryRot); + i = j; + } + + col = 0; + multiLine = gFalse; + for (i = 0; i < nFrags; ++i) { + frag = &frags[i]; + + // insert a return + if (frag->col < col || + (i > 0 && fabs(frag->base - frags[i-1].base) > + maxIntraLineDelta * frags[i-1].line->words->fontSize)) { + s->append(eol, eolLen); + col = 0; + multiLine = gTrue; + } + + // column alignment + for (; col < frag->col; ++col) { + s->append(space, spaceLen); + } + + // get the fragment text + col += dumpFragment(frag->line->text + frag->start, frag->len, uMap, s); + } + + if (multiLine) { + s->append(eol, eolLen); + } + } + + gfree(frags); + uMap->decRefCnt(); + + return s; +} + +GBool TextPage::findCharRange(int pos, int length, + double *xMin, double *yMin, + double *xMax, double *yMax) { + TextBlock *blk; + TextLine *line; + TextWord *word; + double xMin0, xMax0, yMin0, yMax0; + double xMin1, xMax1, yMin1, yMax1; + GBool first; + int i, j0, j1; + + if (rawOrder) { + return gFalse; + } + + //~ this doesn't correctly handle: + //~ - ranges split across multiple lines (the highlighted region + //~ is the bounding box of all the parts of the range) + //~ - cases where characters don't convert one-to-one into Unicode + first = gTrue; + xMin0 = xMax0 = yMin0 = yMax0 = 0; // make gcc happy + xMin1 = xMax1 = yMin1 = yMax1 = 0; // make gcc happy + for (i = 0; i < nBlocks; ++i) { + blk = blocks[i]; + for (line = blk->lines; line; line = line->next) { + for (word = line->words; word; word = word->next) { + if (pos < word->charPos + word->charLen && + word->charPos < pos + length) { + j0 = pos - word->charPos; + if (j0 < 0) { + j0 = 0; + } + j1 = pos + length - 1 - word->charPos; + if (j1 >= word->len) { + j1 = word->len - 1; + } + switch (line->rot) { + case 0: + xMin1 = word->edge[j0]; + xMax1 = word->edge[j1 + 1]; + yMin1 = word->yMin; + yMax1 = word->yMax; + break; + case 1: + xMin1 = word->xMin; + xMax1 = word->xMax; + yMin1 = word->edge[j0]; + yMax1 = word->edge[j1 + 1]; + break; + case 2: + xMin1 = word->edge[j1 + 1]; + xMax1 = word->edge[j0]; + yMin1 = word->yMin; + yMax1 = word->yMax; + break; + case 3: + xMin1 = word->xMin; + xMax1 = word->xMax; + yMin1 = word->edge[j1 + 1]; + yMax1 = word->edge[j0]; + break; + } + if (first || xMin1 < xMin0) { + xMin0 = xMin1; + } + if (first || xMax1 > xMax0) { + xMax0 = xMax1; + } + if (first || yMin1 < yMin0) { + yMin0 = yMin1; + } + if (first || yMax1 > yMax0) { + yMax0 = yMax1; + } + first = gFalse; + } + } + } + } + if (!first) { + *xMin = xMin0; + *xMax = xMax0; + *yMin = yMin0; + *yMax = yMax0; + return gTrue; + } + return gFalse; +} + +void TextPage::dump(void *outputStream, TextOutputFunc outputFunc, + GBool physLayout) { + UnicodeMap *uMap; + TextFlow *flow; + TextBlock *blk; + TextLine *line; + TextLineFrag *frags; + TextWord *word; + int nFrags, fragsSize; + TextLineFrag *frag; + char space[8], eol[16], eop[8]; + int spaceLen, eolLen, eopLen; + GBool pageBreaks; + GString *s; + double delta; + int col, i, j, d, n; + + // get the output encoding + if (!(uMap = globalParams->getTextEncoding())) { + return; + } + spaceLen = uMap->mapUnicode(0x20, space, sizeof(space)); + eolLen = 0; // make gcc happy + switch (globalParams->getTextEOL()) { + case eolUnix: + eolLen = uMap->mapUnicode(0x0a, eol, sizeof(eol)); + break; + case eolDOS: + eolLen = uMap->mapUnicode(0x0d, eol, sizeof(eol)); + eolLen += uMap->mapUnicode(0x0a, eol + eolLen, sizeof(eol) - eolLen); + break; + case eolMac: + eolLen = uMap->mapUnicode(0x0d, eol, sizeof(eol)); + break; + } + eopLen = uMap->mapUnicode(0x0c, eop, sizeof(eop)); + pageBreaks = globalParams->getTextPageBreaks(); + + //~ writing mode (horiz/vert) + + // output the page in raw (content stream) order + if (rawOrder) { + + for (word = rawWords; word; word = word->next) { + s = new GString(); + dumpFragment(word->text, word->len, uMap, s); + (*outputFunc)(outputStream, s->getCString(), s->getLength()); + delete s; + if (word->next && + fabs(word->next->base - word->base) < + maxIntraLineDelta * word->fontSize) { + if (word->next->xMin > word->xMax + minWordSpacing * word->fontSize) { + (*outputFunc)(outputStream, space, spaceLen); + } + } else { + (*outputFunc)(outputStream, eol, eolLen); + } + } + + // output the page, maintaining the original physical layout + } else if (physLayout) { + + // collect the line fragments for the page and sort them + fragsSize = 256; + frags = (TextLineFrag *)gmallocn(fragsSize, sizeof(TextLineFrag)); + nFrags = 0; + for (i = 0; i < nBlocks; ++i) { + blk = blocks[i]; + for (line = blk->lines; line; line = line->next) { + if (nFrags == fragsSize) { + fragsSize *= 2; + frags = (TextLineFrag *)greallocn(frags, + fragsSize, sizeof(TextLineFrag)); + } + frags[nFrags].init(line, 0, line->len); + frags[nFrags].computeCoords(gTrue); + ++nFrags; + } + } + qsort(frags, nFrags, sizeof(TextLineFrag), &TextLineFrag::cmpYXPrimaryRot); + i = 0; + while (i < nFrags) { + delta = maxIntraLineDelta * frags[i].line->words->fontSize; + for (j = i+1; + j < nFrags && fabs(frags[j].base - frags[i].base) < delta; + ++j) ; + qsort(frags + i, j - i, sizeof(TextLineFrag), + &TextLineFrag::cmpXYColumnPrimaryRot); + i = j; + } + +#if 0 // for debugging + printf("*** line fragments ***\n"); + for (i = 0; i < nFrags; ++i) { + frag = &frags[i]; + printf("frag: x=%.2f..%.2f y=%.2f..%.2f base=%.2f '", + frag->xMin, frag->xMax, frag->yMin, frag->yMax, frag->base); + for (n = 0; n < frag->len; ++n) { + fputc(frag->line->text[frag->start + n] & 0xff, stdout); + } + printf("'\n"); + } + printf("\n"); +#endif + + // generate output + col = 0; + for (i = 0; i < nFrags; ++i) { + frag = &frags[i]; + + // column alignment + for (; col < frag->col; ++col) { + (*outputFunc)(outputStream, space, spaceLen); + } + + // print the line + s = new GString(); + col += dumpFragment(frag->line->text + frag->start, frag->len, uMap, s); + (*outputFunc)(outputStream, s->getCString(), s->getLength()); + delete s; + + // print one or more returns if necessary + if (i == nFrags - 1 || + frags[i+1].col < col || + fabs(frags[i+1].base - frag->base) > + maxIntraLineDelta * frag->line->words->fontSize) { + if (i < nFrags - 1) { + d = (int)((frags[i+1].base - frag->base) / + frag->line->words->fontSize); + if (d < 1) { + d = 1; + } else if (d > 5) { + d = 5; + } + } else { + d = 1; + } + for (; d > 0; --d) { + (*outputFunc)(outputStream, eol, eolLen); + } + col = 0; + } + } + + gfree(frags); + + // output the page, "undoing" the layout + } else { + for (flow = flows; flow; flow = flow->next) { + for (blk = flow->blocks; blk; blk = blk->next) { + for (line = blk->lines; line; line = line->next) { + n = line->len; + if (line->hyphenated && (line->next || blk->next)) { + --n; + } + s = new GString(); + dumpFragment(line->text, n, uMap, s); + (*outputFunc)(outputStream, s->getCString(), s->getLength()); + delete s; + if (!line->hyphenated) { + if (line->next) { + (*outputFunc)(outputStream, space, spaceLen); + } else if (blk->next) { + //~ this is a bit of a kludge - we should really do a more + //~ intelligent determination of paragraphs + if (blk->next->lines->words->fontSize == + blk->lines->words->fontSize) { + (*outputFunc)(outputStream, space, spaceLen); + } else { + (*outputFunc)(outputStream, eol, eolLen); + } + } + } + } + } + (*outputFunc)(outputStream, eol, eolLen); + (*outputFunc)(outputStream, eol, eolLen); + } + } + + // end of page + if (pageBreaks) { + (*outputFunc)(outputStream, eop, eopLen); + } + + uMap->decRefCnt(); +} + +void TextPage::assignColumns(TextLineFrag *frags, int nFrags, GBool oneRot) { + TextLineFrag *frag0, *frag1; + int rot, col1, col2, i, j, k; + + // all text in the region has the same rotation -- recompute the + // column numbers based only on the text in the region + if (oneRot) { + qsort(frags, nFrags, sizeof(TextLineFrag), &TextLineFrag::cmpXYLineRot); + rot = frags[0].line->rot; + for (i = 0; i < nFrags; ++i) { + frag0 = &frags[i]; + col1 = 0; + for (j = 0; j < i; ++j) { + frag1 = &frags[j]; + col2 = 0; // make gcc happy + switch (rot) { + case 0: + if (frag0->xMin >= frag1->xMax) { + col2 = frag1->col + (frag1->line->col[frag1->start + frag1->len] - + frag1->line->col[frag1->start]) + 1; + } else { + for (k = frag1->start; + k < frag1->start + frag1->len && + frag0->xMin >= 0.5 * (frag1->line->edge[k] + + frag1->line->edge[k+1]); + ++k) ; + col2 = frag1->col + + frag1->line->col[k] - frag1->line->col[frag1->start]; + } + break; + case 1: + if (frag0->yMin >= frag1->yMax) { + col2 = frag1->col + (frag1->line->col[frag1->start + frag1->len] - + frag1->line->col[frag1->start]) + 1; + } else { + for (k = frag1->start; + k < frag1->start + frag1->len && + frag0->yMin >= 0.5 * (frag1->line->edge[k] + + frag1->line->edge[k+1]); + ++k) ; + col2 = frag1->col + + frag1->line->col[k] - frag1->line->col[frag1->start]; + } + break; + case 2: + if (frag0->xMax <= frag1->xMin) { + col2 = frag1->col + (frag1->line->col[frag1->start + frag1->len] - + frag1->line->col[frag1->start]) + 1; + } else { + for (k = frag1->start; + k < frag1->start + frag1->len && + frag0->xMax <= 0.5 * (frag1->line->edge[k] + + frag1->line->edge[k+1]); + ++k) ; + col2 = frag1->col + + frag1->line->col[k] - frag1->line->col[frag1->start]; + } + break; + case 3: + if (frag0->yMax <= frag1->yMin) { + col2 = frag1->col + (frag1->line->col[frag1->start + frag1->len] - + frag1->line->col[frag1->start]) + 1; + } else { + for (k = frag1->start; + k < frag1->start + frag1->len && + frag0->yMax <= 0.5 * (frag1->line->edge[k] + + frag1->line->edge[k+1]); + ++k) ; + col2 = frag1->col + + frag1->line->col[k] - frag1->line->col[frag1->start]; + } + break; + } + if (col2 > col1) { + col1 = col2; + } + } + frag0->col = col1; + } + + // the region includes text at different rotations -- use the + // globally assigned column numbers, offset by the minimum column + // number (i.e., shift everything over to column 0) + } else { + col1 = frags[0].col; + for (i = 1; i < nFrags; ++i) { + if (frags[i].col < col1) { + col1 = frags[i].col; + } + } + for (i = 0; i < nFrags; ++i) { + frags[i].col -= col1; + } + } +} + +int TextPage::dumpFragment(Unicode *text, int len, UnicodeMap *uMap, + GString *s) { + char lre[8], rle[8], popdf[8], buf[8]; + int lreLen, rleLen, popdfLen, n; + int nCols, i, j, k; + + nCols = 0; + + if (uMap->isUnicode()) { + + lreLen = uMap->mapUnicode(0x202a, lre, sizeof(lre)); + rleLen = uMap->mapUnicode(0x202b, rle, sizeof(rle)); + popdfLen = uMap->mapUnicode(0x202c, popdf, sizeof(popdf)); + + if (primaryLR) { + + i = 0; + while (i < len) { + // output a left-to-right section + for (j = i; j < len && !unicodeTypeR(text[j]); ++j) ; + for (k = i; k < j; ++k) { + n = uMap->mapUnicode(text[k], buf, sizeof(buf)); + s->append(buf, n); + ++nCols; + } + i = j; + // output a right-to-left section + for (j = i; j < len && !unicodeTypeL(text[j]); ++j) ; + if (j > i) { + s->append(rle, rleLen); + for (k = j - 1; k >= i; --k) { + n = uMap->mapUnicode(text[k], buf, sizeof(buf)); + s->append(buf, n); + ++nCols; + } + s->append(popdf, popdfLen); + i = j; + } + } + + } else { + + s->append(rle, rleLen); + i = len - 1; + while (i >= 0) { + // output a right-to-left section + for (j = i; j >= 0 && !unicodeTypeL(text[j]); --j) ; + for (k = i; k > j; --k) { + n = uMap->mapUnicode(text[k], buf, sizeof(buf)); + s->append(buf, n); + ++nCols; + } + i = j; + // output a left-to-right section + for (j = i; j >= 0 && !unicodeTypeR(text[j]); --j) ; + if (j < i) { + s->append(lre, lreLen); + for (k = j + 1; k <= i; ++k) { + n = uMap->mapUnicode(text[k], buf, sizeof(buf)); + s->append(buf, n); + ++nCols; + } + s->append(popdf, popdfLen); + i = j; + } + } + s->append(popdf, popdfLen); + + } + + } else { + for (i = 0; i < len; ++i) { + n = uMap->mapUnicode(text[i], buf, sizeof(buf)); + s->append(buf, n); + nCols += n; + } + } + + return nCols; +} + +#if TEXTOUT_WORD_LIST +TextWordList *TextPage::makeWordList(GBool physLayout) { + return new TextWordList(this, physLayout); +} +#endif + +//------------------------------------------------------------------------ +// TextOutputDev +//------------------------------------------------------------------------ + +static void TextOutputDev_outputToFile(void *stream, char *text, int len) { + fwrite(text, 1, len, (FILE *)stream); +} + +TextOutputDev::TextOutputDev(char *fileName, GBool physLayoutA, + GBool rawOrderA, GBool append) { + text = NULL; + physLayout = physLayoutA; + rawOrder = rawOrderA; + doHTML = gFalse; + ok = gTrue; + + // open file + needClose = gFalse; + if (fileName) { + if (!strcmp(fileName, "-")) { + outputStream = stdout; +#ifdef WIN32 + // keep DOS from munging the end-of-line characters + setmode(fileno(stdout), O_BINARY); +#endif + } else if ((outputStream = fopen(fileName, append ? "ab" : "wb"))) { + needClose = gTrue; + } else { + error(-1, "Couldn't open text file '%s'", fileName); + ok = gFalse; + return; + } + outputFunc = &TextOutputDev_outputToFile; + } else { + outputStream = NULL; + } + + // set up text object + text = new TextPage(rawOrderA); +} + +TextOutputDev::TextOutputDev(TextOutputFunc func, void *stream, + GBool physLayoutA, GBool rawOrderA) { + outputFunc = func; + outputStream = stream; + needClose = gFalse; + physLayout = physLayoutA; + rawOrder = rawOrderA; + doHTML = gFalse; + text = new TextPage(rawOrderA); + ok = gTrue; +} + +TextOutputDev::~TextOutputDev() { + if (needClose) { +#ifdef MACOS + ICS_MapRefNumAndAssign((short)((FILE *)outputStream)->handle); +#endif + fclose((FILE *)outputStream); + } + if (text) { + delete text; + } +} + +void TextOutputDev::startPage(int /*pageNum*/, GfxState *state) { + text->startPage(state); +} + +void TextOutputDev::endPage() { + text->endPage(); + text->coalesce(physLayout, doHTML); + if (outputStream) { + text->dump(outputStream, outputFunc, physLayout); + } +} + +void TextOutputDev::updateFont(GfxState *state) { + text->updateFont(state); +} + +void TextOutputDev::beginString(GfxState * /*state*/, GString * /*s*/) { +} + +void TextOutputDev::endString(GfxState * /*state*/) { +} + +void TextOutputDev::drawChar(GfxState *state, double x, double y, + double dx, double dy, + double /*originX*/, double /*originY*/, + CharCode c, int nBytes, Unicode *u, int uLen) { + text->addChar(state, x, y, dx, dy, c, nBytes, u, uLen); +} + +void TextOutputDev::stroke(GfxState *state) { + GfxPath *path; + GfxSubpath *subpath; + double x[2], y[2]; + + if (!doHTML) { + return; + } + path = state->getPath(); + if (path->getNumSubpaths() != 1) { + return; + } + subpath = path->getSubpath(0); + if (subpath->getNumPoints() != 2) { + return; + } + state->transform(subpath->getX(0), subpath->getY(0), &x[0], &y[0]); + state->transform(subpath->getX(1), subpath->getY(1), &x[1], &y[1]); + + // look for a vertical or horizontal line + if (x[0] == x[1] || y[0] == y[1]) { + text->addUnderline(x[0], y[0], x[1], y[1]); + } +} + +void TextOutputDev::fill(GfxState *state) { + GfxPath *path; + GfxSubpath *subpath; + double x[5], y[5]; + double rx0, ry0, rx1, ry1, t; + int i; + + if (!doHTML) { + return; + } + path = state->getPath(); + if (path->getNumSubpaths() != 1) { + return; + } + subpath = path->getSubpath(0); + if (subpath->getNumPoints() != 5) { + return; + } + for (i = 0; i < 5; ++i) { + if (subpath->getCurve(i)) { + return; + } + state->transform(subpath->getX(i), subpath->getY(i), &x[i], &y[i]); + } + + // look for a rectangle + if (x[0] == x[1] && y[1] == y[2] && x[2] == x[3] && y[3] == y[4] && + x[0] == x[4] && y[0] == y[4]) { + rx0 = x[0]; + ry0 = y[0]; + rx1 = x[2]; + ry1 = y[1]; + } else if (y[0] == y[1] && x[1] == x[2] && y[2] == y[3] && x[3] == x[4] && + x[0] == x[4] && y[0] == y[4]) { + rx0 = x[0]; + ry0 = y[0]; + rx1 = x[1]; + ry1 = y[2]; + } else { + return; + } + if (rx1 < rx0) { + t = rx0; + rx0 = rx1; + rx1 = t; + } + if (ry1 < ry0) { + t = ry0; + ry0 = ry1; + ry1 = t; + } + + // skinny horizontal rectangle + if (ry1 - ry0 < rx1 - rx0) { + if (ry1 - ry0 < maxUnderlineWidth) { + ry0 = 0.5 * (ry0 + ry1); + text->addUnderline(rx0, ry0, rx1, ry0); + } + + // skinny vertical rectangle + } else { + if (rx1 - rx0 < maxUnderlineWidth) { + rx0 = 0.5 * (rx0 + rx1); + text->addUnderline(rx0, ry0, rx0, ry1); + } + } +} + +void TextOutputDev::eoFill(GfxState *state) { + if (!doHTML) { + return; + } + fill(state); +} + +void TextOutputDev::processLink(Link *link, Catalog * /*catalog*/) { + double x1, y1, x2, y2; + int xMin, yMin, xMax, yMax, x, y; + + if (!doHTML) { + return; + } + link->getRect(&x1, &y1, &x2, &y2); + cvtUserToDev(x1, y1, &x, &y); + xMin = xMax = x; + yMin = yMax = y; + cvtUserToDev(x1, y2, &x, &y); + if (x < xMin) { + xMin = x; + } else if (x > xMax) { + xMax = x; + } + if (y < yMin) { + yMin = y; + } else if (y > yMax) { + yMax = y; + } + cvtUserToDev(x2, y1, &x, &y); + if (x < xMin) { + xMin = x; + } else if (x > xMax) { + xMax = x; + } + if (y < yMin) { + yMin = y; + } else if (y > yMax) { + yMax = y; + } + cvtUserToDev(x2, y2, &x, &y); + if (x < xMin) { + xMin = x; + } else if (x > xMax) { + xMax = x; + } + if (y < yMin) { + yMin = y; + } else if (y > yMax) { + yMax = y; + } + text->addLink(xMin, yMin, xMax, yMax, link); +} + +GBool TextOutputDev::findText(Unicode *s, int len, + GBool startAtTop, GBool stopAtBottom, + GBool startAtLast, GBool stopAtLast, + GBool caseSensitive, GBool backward, + double *xMin, double *yMin, + double *xMax, double *yMax) { + return text->findText(s, len, startAtTop, stopAtBottom, + startAtLast, stopAtLast, caseSensitive, backward, + xMin, yMin, xMax, yMax); +} + +GString *TextOutputDev::getText(double xMin, double yMin, + double xMax, double yMax) { + return text->getText(xMin, yMin, xMax, yMax); +} + +GBool TextOutputDev::findCharRange(int pos, int length, + double *xMin, double *yMin, + double *xMax, double *yMax) { + return text->findCharRange(pos, length, xMin, yMin, xMax, yMax); +} + +#if TEXTOUT_WORD_LIST +TextWordList *TextOutputDev::makeWordList() { + return text->makeWordList(physLayout); +} +#endif + +TextPage *TextOutputDev::takeText() { + TextPage *ret; + + ret = text; + text = new TextPage(rawOrder); + return ret; +} |