qtextdocumentfragment.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

               )
               block.setIndent(indent);

            block.merge(node->blockFormat());
            charFmt.merge(node->charFormat());

            // ####################
//                block.setFloatPosition(node->cssFloat);

            if (node->wsm == QTextHtmlParserNode::WhiteSpacePre)
                block.setNonBreakableLines(true);

            if (node->bgColor.isValid() && !node->isTableCell)
                block.setBackground(QBrush(node->bgColor));

            if (hasBlock && (!node->isEmptyParagraph || forceBlockMerging)) {
                if (cursor.position() == 0) {
                    containsCompleteDoc = true;
                }
                cursor.setBlockFormat(block);
                cursor.setBlockCharFormat(charFmt);
            } else {
                if (i == 1 && cursor.position() == 0 && node->isEmptyParagraph) {
                    containsCompleteDoc = true;
                    cursor.setBlockFormat(block);
                    cursor.setBlockCharFormat(charFmt);
                } else {
                    block.clearProperty(QTextFormat::ObjectIndex);
                    charFmt.clearProperty(QTextFormat::ObjectIndex);
                    appendBlock(block, charFmt);
                }
            }

            if (node->isListItem && !lists.isEmpty()) {
                List &l = lists.last();
                if (l.list) {
                    l.list->add(cursor.block());
                } else {
                    l.list = cursor.createList(l.format);
                }
            }

            forceBlockMerging = false;
            if (node->id == Html_body || node->id == Html_html)
                forceBlockMerging = true;

            if (node->isEmptyParagraph) {
                hasBlock = false;
                continue;
            }

            hasBlock = true;
        }

        if (node->isAnchor && !node->anchorName.isEmpty()) {
            setNamedAnchorInNextOutput = true;
            namedAnchor = node->anchorName;
        }
        if (node->text.isEmpty())
            continue;
        hasBlock = false;

        QTextCharFormat format = node->charFormat();
        QString text = node->text;
        if (setNamedAnchorInNextOutput) {
            QTextCharFormat fmt = format;
            fmt.setAnchor(true);
            fmt.setAnchorName(namedAnchor);
            cursor.insertText(QString(text.at(0)), fmt);

            text.remove(0, 1);
            format.setAnchor(false);
            format.setAnchorName(QString());

            setNamedAnchorInNextOutput = false;
        }

        if (!text.isEmpty())
            cursor.insertText(text, format);
    }

    cursor.endEditBlock();
}

// returns true if a block tag was closed
bool QTextHtmlImporter::closeTag(int i)
{
    const QTextHtmlParserNode *closedNode = &at(i - 1);
    const int endDepth = depth(i) - 1;
    int depth = this->depth(i - 1);
    bool blockTagClosed = false;

    while (depth > endDepth) {
        if (closedNode->id == Html_tr && !tables.isEmpty()) {
            Table &t = tables.last();

            if (!t.isTextFrame) {
                ++t.currentRow;
                
                // for broken html with rowspans but missing tr tags
                while (!t.currentCell.atEnd() && t.currentCell.row < t.currentRow)
                    ++t.currentCell;
            }

            blockTagClosed = true;
        } else if (closedNode->id == Html_table && !tables.isEmpty()) {
            tables.resize(tables.size() - 1);

            if (tables.isEmpty()) {
                cursor = doc->rootFrame()->lastCursorPosition();
            } else {
                Table &t = tables.last();
                if (t.isTextFrame)
                    cursor = t.frame->lastCursorPosition();
                else
                    cursor = t.currentCell.cell().lastCursorPosition();
            }

            // we don't need an extra block after tables, so we don't
            // claim to have closed one for the creation of a new one
            // in import()
            blockTagClosed = false;
        } else if (closedNode->isTableCell && !tables.isEmpty()) {
            Table &t = tables.last();
            if (!t.isTextFrame)
                ++tables.last().currentCell;
            blockTagClosed = true;
        } else if (closedNode->isListStart) {

            Q_ASSERT(!lists.isEmpty());

            lists.resize(lists.size() - 1);
            --indent;
            blockTagClosed = true;
        } else if (closedNode->id == Html_hr
                   || closedNode->id == Html_center
                   || closedNode->id == Html_h1
                   || closedNode->id == Html_h2
                   || closedNode->id == Html_h3
                   || closedNode->id == Html_h4
                   || closedNode->id == Html_h5
                   || closedNode->id == Html_h6
                  ) {
            blockTagClosed = true;
        } else if (closedNode->id == Html_p) {
            // blockTagClosed may result in the creation of a
            // new block
            if (!closedNode->text.isEmpty())
                blockTagClosed = true;
        }

        closedNode = &at(closedNode->parent);
        --depth;
    }

    return blockTagClosed;
}

QTextHtmlImporter::Table QTextHtmlImporter::scanTable(int tableNodeIdx)
{
    Table table;
    table.columns = 0;

    QVector<QTextLength> columnWidths;
    QVector<int> rowSpanCellsPerRow;

    QVector<int> rowNodes;
    rowNodes.reserve(at(tableNodeIdx).children.count());
    foreach (int row, at(tableNodeIdx).children)
        switch (at(row).id) {
            case Html_tr:
                rowNodes += row;
                break;
            case Html_thead:
            case Html_tbody:
            case Html_tfoot:
                foreach (int potentialRow, at(row).children)
                    if (at(potentialRow).id == Html_tr)
                        rowNodes += potentialRow;
                break;
            default: break;
        }

    int effectiveRow = 0;
    foreach (int row, rowNodes) {
        int colsInRow = 0;

        foreach (int cell, at(row).children)
            if (at(cell).isTableCell) {

                const QTextHtmlParserNode &c = at(cell);
                const int currentColumn = colsInRow;
                colsInRow += c.tableCellColSpan;

                if (c.tableCellRowSpan > 1) {
                    rowSpanCellsPerRow.resize(effectiveRow + c.tableCellRowSpan + 1);

                    for (int r = effectiveRow + 1; r < effectiveRow + c.tableCellRowSpan; ++r)
                        rowSpanCellsPerRow[r]++;
                }

                columnWidths.resize(qMax(columnWidths.count(), colsInRow));
                for (int i = currentColumn; i < currentColumn + c.tableCellColSpan; ++i)
                    if (columnWidths.at(i).type() == QTextLength::VariableLength)
                        columnWidths[i] = c.width;
            }

        table.columns = qMax(table.columns, colsInRow + rowSpanCellsPerRow.value(effectiveRow, 0));

        ++effectiveRow;
        rowSpanCellsPerRow.append(0);
    }
    table.rows = effectiveRow;

    if (table.rows == 0 || table.columns == 0)
        return table;

    QTextFrameFormat fmt;
    const QTextHtmlParserNode &node = at(tableNodeIdx);
    if (node.isTextFrame) {
        // for plain text frames we set the frame margin
        // for all of top/bottom/left/right, so in the import 
        // here it doesn't matter which one we pick
        fmt.setMargin(node.uncollapsedMargin(QTextHtmlParser::MarginTop));
    } else {
        QTextTableFormat tableFmt;
        tableFmt.setCellSpacing(node.tableCellSpacing);
        tableFmt.setCellPadding(node.tableCellPadding);
        if (node.alignment)
            tableFmt.setAlignment(node.alignment);
        tableFmt.setColumns(table.columns);
        tableFmt.setColumnWidthConstraints(columnWidths);
        fmt = tableFmt;
    }

    fmt.setBorder(node.tableBorder);
    fmt.setWidth(node.width);
    fmt.setHeight(node.height);

    if (node.direction < 2)
        fmt.setLayoutDirection(Qt::LayoutDirection(node.direction));
    if (node.bgColor.isValid())
        fmt.setBackground(QBrush(node.bgColor));
    else
        fmt.clearBackground();
    fmt.setPosition(QTextFrameFormat::Position(node.cssFloat));

    if (node.isTextFrame) {
        table.frame = cursor.insertFrame(fmt);
        table.isTextFrame = true;
    } else {
        QTextTable *textTable = cursor.insertTable(table.rows, table.columns, fmt.toTableFormat());
        table.frame = textTable;

        TableCellIterator it(textTable);
        foreach (int row, rowNodes)
            foreach (int cell, at(row).children)
            if (at(cell).isTableCell) {
                const QTextHtmlParserNode &c = at(cell);

                if (c.tableCellColSpan > 1 || c.tableCellRowSpan > 1)
                    textTable->mergeCells(it.row, it.column, c.tableCellRowSpan, c.tableCellColSpan);

                ++it;
            }

        table.currentCell = TableCellIterator(textTable);
    }
    return table;
}

void QTextHtmlImporter::appendBlock(const QTextBlockFormat &format, QTextCharFormat charFmt)
{
    if (setNamedAnchorInNextOutput) {
        charFmt.setAnchor(true);
        charFmt.setAnchorName(namedAnchor);
        setNamedAnchorInNextOutput = false;
    }

    cursor.insertBlock(format, charFmt);
}

/*!
    \fn QTextDocumentFragment QTextDocumentFragment::fromHtml(const QString &text)

    Returns a QTextDocumentFragment based on the arbitrary piece of
    HTML in the given \a text. The formatting is preserved as much as
    possible; for example, "<b>bold</b>" will become a document
    fragment with the text "bold" with a bold character format.
*/
QTextDocumentFragment QTextDocumentFragment::fromHtml(const QString &html)
{
    QTextDocumentFragment res;
    res.d = new QTextDocumentFragmentPrivate;

    QTextHtmlImporter importer(res.d->doc, html);
    importer.import();
    res.d->containsCompleteDocument = importer.containsCompleteDocument();
    return res;
}