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|
The design of this filter is a bit complicated due to the use of XPDF (which
is not done for use as a library).
PDFImport implements the KoFilter class and is the starting point in the
process:
PDFImport::convert
|
|- Dialog: ask for import options
|
|- Document::paperSize/pageQt::Orientation: extract paper size/orientation
|
|- for each page
| |
| |- Document::treatPage -> [XPDF]PDFDoc::displayPage
| which calls the following methods as appropriate
| * Device::startPage -> new Page
| * Device::endPage -> FilterPage::endPage
| |
| |- [XPDF]TextPage::coalesce
| |
| |- Page::createParagraphs
| |
| |- Page::checkHeader
| |
| |- Page::checkFooter
| * Device::updateFont/... -> TextPage::updateFont
| * Device::beginString -> new String -> new TextString
| * Device::drawChar -> TextPage::addChar -> String::addChar
| |
| |- checkLigature
| |
| |- TextString:addChar
| |
| |- checkCombination
| * Device::endString -> Page::endString -> TextPage::endString
| -> Page::addString
| |
| |- checkCombination
| |
| |- TextPage::addString
| * Device::drawLink -> Page::addLink
| * Device::drawImage(Mask) -> Device::initImage -> Device::addImage
| * Device::stroke/fill/... (ignore at the moment)
|
|- Document::init -> FilterDevice::init: compute and set body, header, and
| footer rectangles for all pages
|
|- for each page
| |
| |- Document::dumpPage -> FilterDevice::dumpPage
| |
| |- Data::initPage
| |
| |- Page::dump
| |
| |- Page::prepare
| | |
| | |- associate links
| | |
| | |- Page::initParagraph: compute tabs, indents and alignments
| | |
| | |- Page::fillParagrap: remove hyphen/eol, add tabs, add text
| | |
| | |- Page::checkSpecialChars -> Page::checkSpecial
| | |
| | |- Page::coalesce(par)
| |
| |- Page::dump(par)
| |
| |- add tab, indents, offsets, flows, text and format
| |
| |- Data::createParagraph
|
|- Data::endDump
|
|- write XML to KoStoreDevice
|
