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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commitce4a32fe52ef09d8f5ff1dd22c001110902b60a2 (patch)
tree5ac38a06f3dde268dc7927dc155896926aaf7012 /khtml/rendering/font.h
downloadtdelibs-ce4a32fe52ef09d8f5ff1dd22c001110902b60a2.tar.gz
tdelibs-ce4a32fe52ef09d8f5ff1dd22c001110902b60a2.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdelibs@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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+/*
+ * This file is part of the html renderer for KDE.
+ *
+ * Copyright (C) 2000-2003 Lars Knoll (knoll@kde.org)
+ * (C) 2000 Antti Koivisto (koivisto@kde.org)
+ * (C) 2000 Dirk Mueller (mueller@kde.org)
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef KHTMLFONT_H
+#define KHTMLFONT_H
+
+#include <qfont.h>
+#include <qfontmetrics.h>
+#include <qmap.h>
+#include <qpainter.h>
+
+class QFontDatabase;
+class QPaintDeviceMetrics;
+
+namespace khtml
+{
+class RenderStyle;
+class CSSStyleSelector;
+
+class FontDef
+{
+public:
+ FontDef()
+ : size( 0 ), italic( false ), smallCaps( false ), weight( 50 ) {}
+ bool operator == ( const FontDef &other ) const {
+ return ( family == other.family &&
+ size == other.size &&
+ italic == other.italic &&
+ smallCaps == other.smallCaps &&
+ weight == other.weight );
+ }
+
+ QString family;
+ short int size;
+ bool italic : 1;
+ bool smallCaps : 1;
+ unsigned int weight : 8;
+};
+
+
+class Font
+{
+ friend class RenderStyle;
+ friend class CSSStyleSelector;
+
+public:
+ Font() : fontDef(), f(), fm( f ), scFont( 0 ), letterSpacing( 0 ), wordSpacing( 0 ) {}
+ Font( const FontDef &fd )
+ : fontDef( fd ), f(), fm( f ), scFont( 0 ), letterSpacing( 0 ), wordSpacing( 0 )
+ {}
+ Font(const Font& o)
+ : fontDef(o.fontDef), f(o.f), fm(o.fm), scFont(o.scFont), letterSpacing(o.letterSpacing), wordSpacing(o.wordSpacing) { if (o.scFont) scFont = new QFont(*o.scFont); }
+ ~Font() { delete scFont; }
+
+ bool operator == ( const Font &other ) const {
+ return (fontDef == other.fontDef &&
+ letterSpacing == other.letterSpacing &&
+ wordSpacing == other.wordSpacing );
+ }
+
+ const FontDef& getFontDef() const { return fontDef; }
+
+ void update( QPaintDeviceMetrics *devMetrics ) const;
+
+ /**
+ * Draws a piece from the given piece of text.
+ * @param p painter
+ * @param x x-coordinate to begin drawing, always denotes leftmost position
+ * @param y y-coordinate of baseline of text
+ * @param str string to draw a piece from
+ * @param slen total length of string
+ * @param pos zero-based offset of beginning of piece
+ * @param len length of piece
+ * @param width additional pixels to be distributed equally among all
+ * spaces
+ * @param d text direction
+ * @param from begin with this position relative to @p pos, -1 to start
+ * at @p pos
+ * @param to stop before this position relative to @p pos, -1 to use full
+ * length of piece
+ * @param bg if valid, fill the background of the drawn piece with this
+ * color
+ * @param uy y-coordinate of top position, used for background and text
+ * decoration painting
+ * @param h total height of line, only used for background and text
+ * decoration painting
+ * @param deco combined text decoration (see Decoration)
+ */
+ void drawText( QPainter *p, int x, int y, QChar *str, int slen, int pos, int len, int width,
+ QPainter::TextDirection d, int from=-1, int to=-1, QColor bg=QColor(),
+ int uy=-1, int h=-1, int deco=0 ) const;
+
+ /** returns the width of the given string chunk in pixels.
+ *
+ * The method also considers various styles like text-align and font-variant
+ * @param str pointer to string
+ * @param slen total length of string
+ * @param pos zero-based position in string where to start measuring
+ * @param len count of characters up to which the width should be determined
+ * @param start starting position of inline text box within str, only
+ * used when toAdd is specified.
+ * @param end ending position of inline text box within str, only
+ * used when toAdd is specified.
+ * @param toAdd amount of pixels to distribute evenly among all spaces of
+ * str. Note that toAdd applies to all spaces within str, but only those
+ * within [pos, pos+len) are counted towards the width.
+ */
+ int width( QChar *str, int slen, int pos, int len, int start = 0, int end = 0, int toAdd = 0 ) const;
+ /** return the width of the given char in pixels.
+ *
+ * The method also considers various styles like text-align and font-variant
+ * @param str pointer to string
+ * @param slen total length of string
+ * @param pos zero-based position of char in string
+ */
+ int width( QChar *str, int slen, int pos) const;
+
+ /** Text decoration constants.
+ *
+ * The enumeration constant values match those of ETextDecoration, but only
+ * a subset is supported.
+ */
+ enum Decoration { UNDERLINE = 0x1, OVERLINE = 0x2, LINE_THROUGH= 0x4 };
+ // Keep in sync with ETextDecoration
+
+ /** draws text decoration
+ * @param p painter
+ * @param x x-coordinate
+ * @param y top y-coordinate of line box
+ * @param baseline baseline
+ * @param width length of decoration in pixels
+ * @param height height of line box
+ * @param deco decoration to be drawn (see Decoration). The enumeration
+ * constants may be combined.
+ */
+ void drawDecoration(QPainter *p, int x, int y, int baseline, int width, int height, int deco) const;
+
+ /** returns letter spacing
+ */
+ int getLetterSpacing() const { return letterSpacing; }
+ /** returns word spacing
+ */
+ int getWordSpacing() const { return wordSpacing; }
+
+private:
+ mutable FontDef fontDef;
+ mutable QFont f;
+ mutable QFontMetrics fm;
+ mutable QFont *scFont;
+ short letterSpacing;
+ short wordSpacing;
+
+ struct ScalKey;
+ enum ScalInfo {
+ Unknown,
+ No,
+ Yes
+ };
+
+ static QMap<ScalKey, ScalInfo>* scalCache;
+ static QMap<ScalKey, QValueList<int> >* scalSizesCache;
+ static bool isFontScalable(QFontDatabase& db, const QFont& font);
+};
+
+} // namespace
+
+#endif