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Open HTML to PDF is a CSS 2.1 renderer written in Java. This artifact contains the core rendering and layout code.
/*
* {{{ header & license
* Copyright (c) 2007 Wisconsin Court System
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This program 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
* }}}
*/
package com.openhtmltopdf.newtable;
import java.awt.Rectangle;
import java.util.*;
import java.util.logging.Level;
import com.openhtmltopdf.css.constants.CSSName;
import com.openhtmltopdf.css.constants.IdentValue;
import com.openhtmltopdf.css.style.CalculatedStyle;
import com.openhtmltopdf.css.style.CssContext;
import com.openhtmltopdf.css.style.Length;
import com.openhtmltopdf.css.style.derived.BorderPropertySet;
import com.openhtmltopdf.css.style.derived.RectPropertySet;
import com.openhtmltopdf.layout.LayoutContext;
import com.openhtmltopdf.render.BlockBox;
import com.openhtmltopdf.render.Box;
import com.openhtmltopdf.render.ContentLimit;
import com.openhtmltopdf.render.ContentLimitContainer;
import com.openhtmltopdf.render.PageBox;
import com.openhtmltopdf.render.RenderingContext;
import com.openhtmltopdf.util.ArrayUtil;
import com.openhtmltopdf.util.LogMessageId;
import com.openhtmltopdf.util.XRLog;
// Much of this code is directly inspired by (and even copied from)
// the equivalent code in KHTML (including the idea of "effective columns" to
// manage colspans and the details of the table layout algorithms). Many kudos
// to the KHTML developers for making such an amazing piece of software!
public class TableBox extends BlockBox {
private final List _columns = new ArrayList<>();
private int[] _columnPos;
private TableLayout _tableLayout;
private List _styleColumns;
private int _pageClearance;
private boolean _marginAreaRoot;
private ContentLimitContainer _contentLimitContainer;
private int _extraSpaceTop;
private int _extraSpaceBottom;
@Override
public boolean isMarginAreaRoot() {
return _marginAreaRoot;
}
public void setMarginAreaRoot(boolean marginAreaRoot) {
_marginAreaRoot = marginAreaRoot;
}
@Override
public BlockBox copyOf() {
TableBox result = new TableBox();
result.setStyle(getStyle());
result.setElement(getElement());
return result;
}
public void addStyleColumn(TableColumn col) {
if (_styleColumns == null) {
_styleColumns = new ArrayList<>();
}
_styleColumns.add(col);
}
public List getStyleColumns() {
return _styleColumns == null ? Collections.emptyList() : _styleColumns;
}
public int[] getColumnPos() {
return ArrayUtil.cloneOrEmpty(_columnPos);
}
private void setColumnPos(int[] columnPos) {
_columnPos = columnPos;
}
public int numEffCols() {
return _columns.size();
}
public int spanOfEffCol(int effCol) {
return _columns.get(effCol).getSpan();
}
public int colToEffCol(int col) {
int c = 0;
int i = 0;
while (c < col && i < numEffCols()) {
c += spanOfEffCol(i);
i++;
}
return i;
}
public int effColToCol(int effCol) {
int c = 0;
for (int i = 0; i < effCol; i++) {
c += spanOfEffCol(i);
}
return c;
}
private Iterable getTableSections() {
return () -> getChildIteratorOfType(TableSectionBox.class);
}
public void appendColumn(int span) {
ColumnData data = new ColumnData();
data.setSpan(span);
_columns.add(data);
for (TableSectionBox section : getTableSections()) {
section.extendGridToColumnCount(_columns.size());
}
}
@Override
public void setStyle(CalculatedStyle style) {
super.setStyle(style);
if (isMarginAreaRoot()) {
_tableLayout = new MarginTableLayout(this);
} else if (getStyle().isIdent(CSSName.TABLE_LAYOUT, IdentValue.AUTO) || getStyle().isAutoWidth()) {
_tableLayout = new AutoTableLayout(this);
} else {
_tableLayout = new FixedTableLayout(this);
}
}
@Override
public void calcMinMaxWidth(LayoutContext c) {
if (! isMinMaxCalculated()) {
recalcSections(c);
if (getStyle().isCollapseBorders()) {
calcBorders(c);
}
_tableLayout.calcMinMaxWidth(c);
setMinMaxCalculated(true);
}
}
public void splitColumn(int pos, int firstSpan) {
ColumnData newColumn = new ColumnData();
newColumn.setSpan(firstSpan);
_columns.add(pos, newColumn);
ColumnData leftOver = _columns.get(pos+1);
leftOver.setSpan(leftOver.getSpan() - firstSpan);
for (TableSectionBox section : getTableSections()) {
section.splitColumn(pos);
}
}
public int marginsBordersPaddingAndSpacing(CssContext c, boolean ignoreAutoMargins) {
int result = 0;
RectPropertySet margin = getMargin(c);
if (! ignoreAutoMargins || ! getStyle().isAutoLeftMargin()) {
result += (int)margin.left();
}
if (! ignoreAutoMargins || ! getStyle().isAutoRightMargin()) {
result += (int)margin.right();
}
BorderPropertySet border = getBorder(c);
result += (int)border.left() + (int)border.right();
if (! getStyle().isCollapseBorders()) {
RectPropertySet padding = getPadding(c);
int hSpacing = getStyle().getBorderHSpacing(c);
result += padding.left() + padding.right() + (numEffCols()+1) * hSpacing;
}
return result;
}
public List getColumns() {
return _columns;
}
private void recalcSections(LayoutContext c) {
ensureChildren(c);
for (TableSectionBox section : getTableSections()) {
section.recalcCells(c);
}
}
private void calcBorders(LayoutContext c) {
ensureChildren(c);
for (TableSectionBox section : getTableSections()) {
section.calcBorders(c);
}
}
@Override
protected boolean isAllowHeightToShrink() {
return false;
}
@Override
public void layout(LayoutContext c) {
boolean pushedLayer = checkPushLayer(c, getStyle());
checkPushBfc(c);
calcMinMaxWidth(c);
calcDimensions(c);
calcWidth();
calcPageClearance(c);
// Recalc to pick up auto margins now that layout has been called on
// containing block and the table has a content width
if (! isAnonymous()) {
setDimensionsCalculated(false);
calcDimensions(c, getContentWidth());
}
_tableLayout.layout(c);
setCellWidths(c);
layoutTable(c);
checkPopBfc(c);
if (pushedLayer) {
c.popLayer();
}
}
@Override
protected void resolveAutoMargins(LayoutContext c, int cssWidth, RectPropertySet padding,
BorderPropertySet border) {
// If our minimum width is greater than the calculated CSS width,
// don't try to allocate any margin space to auto margins. It
// will just confuse the issue later when we expand the effective
// table width to its minimum width.
if (getMinWidth() <= getContentWidth() + marginsBordersPaddingAndSpacing(c, true)) {
super.resolveAutoMargins(c, cssWidth, padding, border);
} else {
if (getStyle().isAutoLeftMargin()) {
setMarginLeft(c, 0);
}
if (getStyle().isAutoRightMargin()) {
setMarginRight(c, 0);
}
}
}
private void layoutTable(LayoutContext c) {
boolean running = c.isPrint() && getStyle().isPaginateTable();
int prevExtraTop = 0;
int prevExtraBottom = 0;
if (running) {
prevExtraTop = c.getExtraSpaceTop();
prevExtraBottom = c.getExtraSpaceBottom();
c.setExtraSpaceTop(c.getExtraSpaceTop() +
(int)getPadding(c).top() +
(int)getBorder(c).top() +
getStyle().getBorderVSpacing(c));
c.setExtraSpaceBottom(c.getExtraSpaceBottom() +
(int)getPadding(c).bottom() +
(int)getBorder(c).bottom() +
getStyle().getBorderVSpacing(c));
}
super.layout(c);
if (running) {
if (isNeedAnalyzePageBreaks()) {
analyzePageBreaks(c);
setExtraSpaceTop(0);
setExtraSpaceBottom(0);
} else {
setExtraSpaceTop(c.getExtraSpaceTop() - prevExtraTop);
setExtraSpaceBottom(c.getExtraSpaceBottom() - prevExtraBottom);
}
c.setExtraSpaceTop(prevExtraTop);
c.setExtraSpaceBottom(prevExtraBottom);
}
}
@Override
protected void layoutChildren(LayoutContext c, int contentStart) {
ensureChildren(c);
// If we have a running footer, we need its dimensions right away
boolean running = c.isPrint() && getStyle().isPaginateTable();
if (running) {
int headerHeight = layoutRunningHeader(c);
int footerHeight = layoutRunningFooter(c);
int spacingHeight = footerHeight == 0 ? 0 : getStyle().getBorderVSpacing(c);
PageBox first = c.getRootLayer().getFirstPage(c, this);
if (getAbsY() + getTy() + headerHeight + footerHeight + spacingHeight > first.getBottom()) {
// XXX Performance problem here. This forces the table
// to move to the next page (which we want), but the initial
// table layout run still completes (which we don't)
setNeedPageClear(true);
}
}
super.layoutChildren(c, contentStart);
}
private int layoutRunningHeader(LayoutContext c) {
int result = 0;
if (getChildCount() > 0) {
TableSectionBox section = (TableSectionBox)getChild(0);
if (section.isHeader()) {
c.setNoPageBreak(c.getNoPageBreak() + 1);
section.initContainingLayer(c);
section.layout(c);
c.setExtraSpaceTop(c.getExtraSpaceTop() + section.getHeight());
result = section.getHeight();
section.reset(c);
c.setNoPageBreak(c.getNoPageBreak() - 1);
}
}
return result;
}
private int layoutRunningFooter(LayoutContext c) {
int result = 0;
if (getChildCount() > 0) {
TableSectionBox section = (TableSectionBox)getChild(getChildCount()-1);
if (section.isFooter()) {
c.setNoPageBreak(c.getNoPageBreak() + 1);
section.initContainingLayer(c);
section.layout(c);
c.setExtraSpaceBottom(c.getExtraSpaceBottom() +
section.getHeight() +
getStyle().getBorderVSpacing(c));
result = section.getHeight();
section.reset(c);
c.setNoPageBreak(c.getNoPageBreak() - 1);
}
}
return result;
}
private boolean isNeedAnalyzePageBreaks() {
Box b = findAncestor(bx -> bx.getStyle().isTable() && bx.getStyle().isPaginateTable());
return b == null;
}
private void analyzePageBreaks(LayoutContext c) {
analyzePageBreaks(c, null);
}
@Override
public void analyzePageBreaks(LayoutContext c, ContentLimitContainer container) {
_contentLimitContainer = new ContentLimitContainer(c, getAbsY());
_contentLimitContainer.setParent(container);
if (container != null) {
container.updateTop(c, getAbsY());
container.updateBottom(c, getAbsY() + getHeight());
}
for (Box b : getChildren()) {
b.analyzePageBreaks(c, _contentLimitContainer);
}
if (container != null && _contentLimitContainer.isContainsMultiplePages() &&
(getExtraSpaceTop() > 0 || getExtraSpaceBottom() > 0)) {
propagateExtraSpace(c, container, _contentLimitContainer, getExtraSpaceTop(), getExtraSpaceBottom());
}
}
@Override
public void paintBackground(RenderingContext c) {
if (_contentLimitContainer == null) {
super.paintBackground(c);
} else if (getStyle().isVisible(c, this)) {
c.getOutputDevice().paintBackground(
c, getStyle(), getContentLimitedBorderEdge(c), getPaintingBorderEdge(c),
getStyle().getBorder(c));
}
}
@Override
public void paintBorder(RenderingContext c) {
if (_contentLimitContainer == null) {
super.paintBorder(c);
} else if (getStyle().isVisible(c, this)) {
c.getOutputDevice().paintBorder(c, getStyle(), getContentLimitedBorderEdge(c), getBorderSides());
}
}
private Rectangle getContentLimitedBorderEdge(RenderingContext c) {
Rectangle result = getPaintingBorderEdge(c);
ContentLimit limit = _contentLimitContainer.getContentLimit(c.getPageNo());
if (limit == null) {
XRLog.log(Level.WARNING, LogMessageId.LogMessageId0Param.LAYOUT_NO_CONTENT_LIMIT_FOUND);
return result;
} else {
if (limit.getTop() == ContentLimit.UNDEFINED ||
limit.getBottom() == ContentLimit.UNDEFINED) {
return result;
}
RectPropertySet padding = getPadding(c);
BorderPropertySet border = getBorder(c);
int top;
if (c.getPageNo() == _contentLimitContainer.getInitialPageNo()) {
top = result.y;
} else {
top = limit.getTop() - (int)padding.top() -
(int)border.top() - getStyle().getBorderVSpacing(c);
if (getChildCount() > 0) {
TableSectionBox section = (TableSectionBox)getChild(0);
if (section.isHeader()) {
top -= section.getHeight();
}
}
}
int bottom;
if (c.getPageNo() == _contentLimitContainer.getLastPageNo()) {
bottom = result.y + result.height;
} else {
bottom = limit.getBottom() + (int)padding.bottom() +
(int)border.bottom() + getStyle().getBorderVSpacing(c);
if (getChildCount() > 0) {
TableSectionBox section = (TableSectionBox)getChild(getChildCount()-1);
if (section.isFooter()) {
bottom += section.getHeight();
}
}
}
result.y = top;
result.height = bottom - top;
return result;
}
}
public void updateHeaderFooterPosition(RenderingContext c) {
ContentLimit limit = _contentLimitContainer.getContentLimit(c.getPageNo());
if (limit != null) {
updateHeaderPosition(c, limit);
updateFooterPosition(c, limit);
}
}
private void updateHeaderPosition(RenderingContext c, ContentLimit limit) {
if (limit.getTop() != ContentLimit.UNDEFINED ||
c.getPageNo() == _contentLimitContainer.getInitialPageNo()) {
if (getChildCount() > 0) {
TableSectionBox section = (TableSectionBox)getChild(0);
if (section.isHeader()) {
if (! section.isCapturedOriginalAbsY()) {
section.setOriginalAbsY(section.getAbsY());
section.setCapturedOriginalAbsY(true);
}
int newAbsY;
if (c.getPageNo() == _contentLimitContainer.getInitialPageNo()) {
newAbsY = section.getOriginalAbsY();
} else {
newAbsY = limit.getTop() -
getStyle().getBorderVSpacing(c) -
section.getHeight();
}
int diff = newAbsY - section.getAbsY();
if (diff != 0) {
section.setY(section.getY() + diff);
section.calcCanvasLocation();
section.calcChildLocations();
section.calcPaintingInfo(c, false);
}
}
}
}
}
private void updateFooterPosition(RenderingContext c, ContentLimit limit) {
if (limit.getBottom() != ContentLimit.UNDEFINED ||
c.getPageNo() == _contentLimitContainer.getLastPageNo()) {
if (getChildCount() > 0) {
TableSectionBox section = (TableSectionBox)getChild(getChildCount()-1);
if (section.isFooter()) {
if (! section.isCapturedOriginalAbsY()) {
section.setOriginalAbsY(section.getAbsY());
section.setCapturedOriginalAbsY(true);
}
int newAbsY;
if (c.getPageNo() == _contentLimitContainer.getLastPageNo()) {
newAbsY = section.getOriginalAbsY();
} else {
newAbsY = limit.getBottom();
}
int diff = newAbsY - section.getAbsY();
if (diff != 0) {
section.setY(section.getY() + diff);
section.calcCanvasLocation();
section.calcChildLocations();
section.calcPaintingInfo(c, false);
}
}
}
}
}
private void calcPageClearance(LayoutContext c) {
if (c.isPrint() && getStyle().isCollapseBorders()) {
PageBox page = c.getRootLayer().getFirstPage(c, this);
if (page != null) {
TableRowBox row = getFirstRow();
if (row != null) {
int spill = 0;
for (Iterator i = row.getChildIteratorOfType(TableCellBox.class); i.hasNext(); ) {
TableCellBox cell = i.next();
BorderPropertySet collapsed = cell.getCollapsedPaintingBorder();
int tmp = (int)collapsed.top() / 2;
if (tmp > spill) {
spill = tmp;
}
}
int borderTop = getAbsY() + (int)getMargin(c).top() - spill;
int delta = page.getTop() - borderTop;
if (delta > 0) {
setY(getY() + delta);
setPageClearance(delta);
calcCanvasLocation();
c.translate(0, delta);
}
}
}
}
}
private void calcWidth() {
if (getMinWidth() > getWidth()) {
setContentWidth(getContentWidth() + getMinWidth() - getWidth());
} else if (getStyle().isIdent(CSSName.WIDTH, IdentValue.AUTO) &&
getMaxWidth() < getWidth()) {
setContentWidth(getContentWidth() - (getWidth() - getMaxWidth()));
}
}
public TableRowBox getFirstRow() {
for (TableSectionBox section : getTableSections()) {
if (section.getChildCount() > 0) {
return (TableRowBox)section.getChild(0);
}
}
return null;
}
public TableRowBox getFirstBodyRow() {
for (TableSectionBox section : getTableSections()) {
if (section.isHeader() || section.isFooter()) {
continue;
}
if (section.getChildCount() > 0) {
return (TableRowBox)section.getChild(0);
}
}
return null;
}
private void setCellWidths(LayoutContext c) {
for (TableSectionBox section : getTableSections()) {
section.setCellWidths(c);
}
}
@Override
protected void calcLayoutHeight(LayoutContext c, BorderPropertySet border,
RectPropertySet margin, RectPropertySet padding) {
super.calcLayoutHeight(c, border, margin, padding);
if (getChildCount() > 0) {
setHeight(getHeight() + getStyle().getBorderVSpacing(c));
}
}
@Override
public void reset(LayoutContext c) {
super.reset(c);
_contentLimitContainer = null;
_tableLayout.reset();
}
@Override
protected int getCSSWidth(CssContext c) {
if (getStyle().isAutoWidth()) {
return -1;
} else {
// XHTML 1.0 specifies that a table width refers to the border
// width. This can be removed if/when we support the box-sizing
// property.
int result = (int)getStyle().getFloatPropertyProportionalWidth(
CSSName.WIDTH, getContainingBlock().getContentWidth(), c);
BorderPropertySet border = getBorder(c);
result -= (int)border.left() + (int)border.right();
if (! getStyle().isCollapseBorders()) {
RectPropertySet padding = getPadding(c);
result -= (int)padding.left() + (int)padding.right();
}
return result >= 0 ? result : -1;
}
}
public TableColumn colElement(int col) {
List styleColumns = getStyleColumns();
if (styleColumns.size() == 0) {
return null;
}
int cCol = 0;
for (TableColumn colElem : styleColumns) {
int span = colElem.getStyle().getColSpan();
cCol += span;
if (cCol > col) {
return colElem;
}
}
return null;
}
public Rectangle getColumnBounds(CssContext c, int col) {
int effCol = colToEffCol(col);
int hspacing = getStyle().getBorderHSpacing(c);
int vspacing = getStyle().getBorderVSpacing(c);
Rectangle result = getContentAreaEdge(getAbsX(), getAbsY(), c);
result.y += vspacing;
result.height -= vspacing*2;
result.x += _columnPos[effCol] + hspacing;
return result;
}
@Override
public BorderPropertySet getBorder(CssContext cssCtx) {
if (getStyle().isCollapseBorders()) {
return BorderPropertySet.EMPTY_BORDER;
} else {
return super.getBorder(cssCtx);
}
}
public int calcFixedHeightRowBottom(CssContext c) {
if (! isAnonymous()) {
int cssHeight = getCSSHeight(c);
if (cssHeight != -1) {
return getAbsY() + cssHeight
- (int)getBorder(c).bottom() - (int)getPadding(c).bottom()
- getStyle().getBorderVSpacing(c);
}
}
return -1;
}
@Override
protected boolean isMayCollapseMarginsWithChildren() {
return false;
}
protected TableSectionBox sectionAbove(
TableSectionBox section, boolean skipEmptySections) {
TableSectionBox prevSection = (TableSectionBox)section.getPreviousSibling();
if (prevSection == null) {
return null;
}
while (prevSection != null) {
if (prevSection.numRows() > 0 || !skipEmptySections) {
break;
}
prevSection = (TableSectionBox)prevSection.getPreviousSibling();
}
return prevSection;
}
protected TableSectionBox sectionBelow(
TableSectionBox section, boolean skipEmptySections) {
TableSectionBox nextSection = (TableSectionBox)section.getNextSibling();
if (nextSection == null) {
return null;
}
while (nextSection != null) {
if (nextSection.numRows() > 0 || !skipEmptySections) {
break;
}
nextSection = (TableSectionBox)nextSection.getNextSibling();
}
return nextSection;
}
protected TableCellBox cellAbove(TableCellBox cell) {
// Find the section and row to look in
int r = cell.getRow();
TableSectionBox section = null;
int rAbove = 0;
if (r > 0) {
// cell is not in the first row, so use the above row in its own
// section
section = cell.getSection();
rAbove = r - 1;
} else {
section = sectionAbove(cell.getSection(), true);
if (section != null) {
rAbove = section.numRows() - 1;
}
}
// Look up the cell in the section's grid, which requires effective col
// index
if (section != null) {
int effCol = colToEffCol(cell.getCol());
TableCellBox aboveCell;
// If we hit a span back up to a real cell.
do {
aboveCell = section.cellAt(rAbove, effCol);
effCol--;
} while (aboveCell == TableCellBox.SPANNING_CELL && effCol >= 0);
return (aboveCell == TableCellBox.SPANNING_CELL) ? null : aboveCell;
} else {
return null;
}
}
protected TableCellBox cellBelow(TableCellBox cell) {
// Find the section and row to look in
int r = cell.getRow() + cell.getStyle().getRowSpan() - 1;
TableSectionBox section = null;
int rBelow = 0;
if (r < cell.getSection().numRows() - 1) {
// The cell is not in the last row, so use the next row in the
// section.
section = cell.getSection();
rBelow = r + 1;
} else {
section = sectionBelow(cell.getSection(), true);
if (section != null)
rBelow = 0;
}
// Look up the cell in the section's grid, which requires effective col
// index
if (section != null) {
int effCol = colToEffCol(cell.getCol());
TableCellBox belowCell;
// If we hit a colspan back up to a real cell.
do {
belowCell = section.cellAt(rBelow, effCol);
effCol--;
} while (belowCell == TableCellBox.SPANNING_CELL && effCol >= 0);
return (belowCell == TableCellBox.SPANNING_CELL) ? null : belowCell;
} else {
return null;
}
}
protected TableCellBox cellLeft(TableCellBox cell) {
TableSectionBox section = cell.getSection();
int effCol = colToEffCol(cell.getCol());
if (effCol == 0) {
return null;
}
// If we hit a colspan back up to a real cell.
TableCellBox prevCell;
do {
prevCell = section.cellAt(cell.getRow(), effCol - 1);
effCol--;
} while (prevCell == TableCellBox.SPANNING_CELL && effCol >= 0);
return (prevCell == TableCellBox.SPANNING_CELL) ? null : prevCell;
}
protected TableCellBox cellRight(TableCellBox cell) {
int effCol = colToEffCol(cell.getCol() + cell.getStyle().getColSpan());
if (effCol >= numEffCols()) {
return null;
}
TableCellBox result = cell.getSection().cellAt(cell.getRow(), effCol);
return (result == TableCellBox.SPANNING_CELL) ? null : result;
}
@Override
public int calcInlineBaseline(CssContext c) {
int result = 0;
boolean found = false;
OUTER:
for (TableSectionBox section : getTableSections()) {
for (Iterator j = section.getChildIteratorOfType(TableRowBox.class); j.hasNext(); ) {
TableRowBox row = j.next();
found = true;
result = row.getAbsY() + row.getBaseline() - getAbsY();
break OUTER;
}
}
if (! found) {
result = getHeight();
}
return result;
}
@Override
protected int getPageClearance() {
return _pageClearance;
}
protected void setPageClearance(int pageClearance) {
_pageClearance = pageClearance;
}
public boolean hasContentLimitContainer() {
return _contentLimitContainer != null;
}
/**
* @return true if the table is rendered on its first page. false if the table is rendered after a page break
*/
public boolean isTableRenderedOnFirstPage(RenderingContext context){
return hasContentLimitContainer() && _contentLimitContainer.getInitialPageNo() == context.getPageNo();
}
public int getExtraSpaceTop() {
return _extraSpaceTop;
}
public void setExtraSpaceTop(int extraSpaceTop) {
_extraSpaceTop = extraSpaceTop;
}
public int getExtraSpaceBottom() {
return _extraSpaceBottom;
}
public void setExtraSpaceBottom(int extraSpaceBottom) {
_extraSpaceBottom = extraSpaceBottom;
}
private interface TableLayout {
public void calcMinMaxWidth(LayoutContext c);
public void layout(LayoutContext c);
public void reset();
}
/**
* A specialization of AutoTableLayout used for laying out the
* tables used to approximate the margin box layout algorithm from CSS3
* GCPM.
*/
private static class MarginTableLayout extends AutoTableLayout {
public MarginTableLayout(TableBox table) {
super(table);
}
@Override
protected int getMinColWidth() {
return 0;
}
@Override
public void calcMinMaxWidth(LayoutContext c) {
super.calcMinMaxWidth(c);
Layout[] layoutStruct = getLayoutStruct();
if (layoutStruct.length == 3) {
Layout center = layoutStruct[1];
if (! (center.width().isVariable() && center.maxWidth() == 0)) {
if (layoutStruct[0].minWidth() > layoutStruct[2].minWidth()) {
layoutStruct[2] = layoutStruct[0];
} else if (layoutStruct[2].minWidth() > layoutStruct[0].minWidth()) {
layoutStruct[0] = layoutStruct[2];
} else {
Layout l = new Layout();
l.setMinWidth(Math.max(layoutStruct[0].minWidth(), layoutStruct[2].minWidth()));
l.setEffMinWidth(l.minWidth());
l.setMaxWidth(Math.max(layoutStruct[0].maxWidth(), layoutStruct[2].maxWidth()));
l.setEffMaxWidth(l.maxWidth());
layoutStruct[0] = l;
layoutStruct[2] = l;
}
}
}
}
}
private static class FixedTableLayout implements TableLayout {
private final TableBox _table;
private List _widths;
public FixedTableLayout(TableBox table) {
_table = table;
}
public void reset() {
_widths = null;
}
private void initWidths() {
_widths = new ArrayList<>(_table.numEffCols());
for (int i = 0; i < _table.numEffCols(); i++) {
_widths.add(new Length());
}
}
private int calcWidthArray(LayoutContext c) {
initWidths();
TableBox table = _table;
int cCol = 0;
int nEffCols = table.numEffCols();
int usedWidth = 0;
for (TableColumn col : table.getStyleColumns()) {
int span = col.getStyle().getColSpan();
Length w = col.getStyle().asLength(c, CSSName.WIDTH);
if (w.isVariable() && col.getParent() != null) {
w = col.getParent().getStyle().asLength(c, CSSName.WIDTH);
}
long effWidth = 0;
if (w.isFixed() && w.value() > 0) {
effWidth = w.value();
effWidth = Math.min(effWidth, Length.MAX_WIDTH);
}
int usedSpan = 0;
int i = 0;
while (usedSpan < span) {
if (cCol + i >= nEffCols) {
table.appendColumn(span - usedSpan);
nEffCols++;
_widths.add(new Length());
}
int eSpan = table.spanOfEffCol(cCol + i);
if ((w.isFixed() || w.isPercent()) && w.value() > 0) {
_widths.set(cCol + i, new Length(w.value() * eSpan, w.type()));
usedWidth += effWidth * eSpan;
}
usedSpan += eSpan;
i++;
}
cCol += i;
}
cCol = 0;
TableRowBox firstRow = _table.getFirstRow();
if (firstRow != null) {
for (Iterator j = firstRow.getChildIteratorOfType(TableCellBox.class); j.hasNext();) {
TableCellBox cell = j.next();
Length w = cell.getOuterStyleWidth(c);
int span = cell.getStyle().getColSpan();
long effWidth = 0;
if (w.isFixed() && w.value() > 0) {
effWidth = w.value();
}
int usedSpan = 0;
int i = 0;
while (usedSpan < span) {
int eSpan = _table.spanOfEffCol(cCol + i);
Length columnWidth = _widths.get(cCol + i);
// only set if no col element has already set it.
if (columnWidth.isVariable() && !w.isVariable()) {
_widths.set(cCol + i, new Length(w.value() * eSpan, w.type()));
usedWidth += effWidth * eSpan;
}
usedSpan += eSpan;
i++;
}
cCol += i;
}
}
return usedWidth;
}
@Override
public void calcMinMaxWidth(LayoutContext c) {
int bs = _table.marginsBordersPaddingAndSpacing(c, true);
_table.calcDimensions(c);
// Reset to allow layout to have another crack at this. If we're
// participating in a nested max/min-width calculation, the values
// calculated above may be wrong and may need updating once our
// parent has a width.
_table.setDimensionsCalculated(false);
int mw = calcWidthArray(c) + bs;
_table.setMinWidth(Math.max(mw, _table.getWidth()));
_table.setMaxWidth(_table.getMinWidth());
boolean haveNonFixed = false;
for (int i = 0; i < _widths.size(); i++) {
Length w = _widths.get(i);
if (! w.isFixed()) {
haveNonFixed = true;
break;
}
}
if (haveNonFixed) {
_table.setMaxWidth(Length.MAX_WIDTH);
}
}
@Override
public void layout(LayoutContext c) {
int tableWidth = _table.getWidth() - _table.marginsBordersPaddingAndSpacing(c, false);
int available = tableWidth;
int nEffCols = _table.numEffCols();
long[] calcWidth = new long[nEffCols];
Arrays.fill(calcWidth, -1);
// first assign fixed width
for ( int i = 0; i < nEffCols; i++ ) {
Length l = _widths.get(i);
if ( l.isFixed() ) {
calcWidth[i] = l.value();
available -= l.value();
}
}
// assign percent width
if ( available > 0 ) {
int totalPercent = 0;
for ( int i = 0; i < nEffCols; i++ ) {
Length l = _widths.get(i);
if ( l.isPercent() ) {
totalPercent += l.value();
}
}
// calculate how much to distribute to percent cells.
int base = tableWidth * totalPercent / 100;
if (base > available) {
base = available;
}
for ( int i = 0; available > 0 && i < nEffCols; i++ ) {
Length l = _widths.get(i);
if ( l.isPercent() ) {
long w = base * l.value() / totalPercent;
available -= w;
calcWidth[i] = w;
}
}
}
// assign variable width
if ( available > 0 ) {
int totalVariable = 0;
for ( int i = 0; i < nEffCols; i++ ) {
Length l = _widths.get(i);
if ( l.isVariable() ) {
totalVariable++;
}
}
for ( int i = 0; available > 0 && i < nEffCols; i++ ) {
Length l = _widths.get(i);
if ( l.isVariable() ) {
int w = available / totalVariable;
available -= w;
calcWidth[i] = w;
totalVariable--;
}
}
}
for ( int i = 0; i < nEffCols; i++ ) {
if ( calcWidth[i] < 0 ) {
calcWidth[i] = 0; // IE gives min 1 px...
}
}
// spread extra space over columns
if ( available > 0 ) {
int total = nEffCols;
// still have some width to spread
int i = nEffCols;
while ( i-- > 0 ) {
int w = available / total;
available -= w;
total--;
calcWidth[i] += w;
}
}
int pos = 0;
int hspacing = _table.getStyle().getBorderHSpacing(c);
int[] columnPos = new int[nEffCols+1];
for ( int i = 0; i < nEffCols; i++ ) {
columnPos[i] = pos;
pos += calcWidth[i] + hspacing;
}
columnPos[columnPos.length-1] = pos;
_table.setColumnPos(columnPos);
}
}
private static class AutoTableLayout implements TableLayout {
private final TableBox _table;
private Layout[] _layoutStruct;
private List _spanCells;
public AutoTableLayout(TableBox table) {
_table = table;
}
@Override
public void reset() {
_layoutStruct = null;
_spanCells = null;
}
protected Layout[] getLayoutStruct() {
return _layoutStruct;
}
private void fullRecalc(LayoutContext c) {
_layoutStruct = new Layout[_table.numEffCols()];
for (int i = 0; i < _layoutStruct.length; i++) {
_layoutStruct[i] = new Layout();
_layoutStruct[i].setMinWidth(getMinColWidth());
_layoutStruct[i].setMaxWidth(getMinColWidth());
}
_spanCells = new ArrayList<>();
TableBox table = _table;
int nEffCols = table.numEffCols();
int cCol = 0;
for (TableColumn col : table.getStyleColumns()) {
int span = col.getStyle().getColSpan();
Length w = col.getStyle().asLength(c, CSSName.WIDTH);
if (w.isVariable() && col.getParent() != null) {
w = col.getParent().getStyle().asLength(c, CSSName.WIDTH);
}
if ((w.isFixed() && w.value() == 0) || (w.isPercent() && w.value() == 0)) {
w = new Length();
}
int cEffCol = table.colToEffCol(cCol);
if (!w.isVariable() && span == 1 && cEffCol < nEffCols) {
if (table.spanOfEffCol(cEffCol) == 1) {
_layoutStruct[cEffCol].setWidth(w);
if (w.isFixed() && _layoutStruct[cEffCol].maxWidth() < w.value()) {
_layoutStruct[cEffCol].setMaxWidth(w.value());
}
}
}
cCol += span;
}
for (int i = 0; i < nEffCols; i++) {
recalcColumn(c, i);
}
}
protected int getMinColWidth() {
return 1;
}
private void recalcColumn(LayoutContext c, int effCol) {
Layout l = _layoutStruct[effCol];
// first we iterate over all rows.
for (Iterator j = _table.getChildIteratorOfType(TableSectionBox.class); j.hasNext();) {
TableSectionBox section = j.next();
int numRows = section.numRows();
for (int i = 0; i < numRows; i++) {
TableCellBox cell = section.cellAt(i, effCol);
if (cell == TableCellBox.SPANNING_CELL || cell == null) {
continue;
}
if (cell.getStyle().getColSpan() == 1) {
// A cell originates in this column. Ensure we have
// a min/max width of at least 1px for this column now.
l.setMinWidth(Math.max(l.minWidth(), getMinColWidth()));
l.setMaxWidth(Math.max(l.maxWidth(), getMinColWidth()));
cell.calcMinMaxWidth(c);
if (cell.getMinWidth() > l.minWidth()) {
l.setMinWidth(cell.getMinWidth());
}
if (cell.getMaxWidth() > l.maxWidth()) {
l.setMaxWidth(cell.getMaxWidth());
}
Length w = cell.getOuterStyleOrColWidth(c);
w.setValue(Math.min(Length.MAX_WIDTH, Math.max(0, w.value())));
switch (w.type()) {
case Length.FIXED:
if (w.value() > 0 && !l.width().isPercent()) {
if (l.width().isFixed()) {
if (w.value() > l.width().value()) {
l.width().setValue(w.value());
}
} else {
l.setWidth(w);
}
if (w.value() > l.maxWidth()) {
l.setMaxWidth(w.value());
}
}
break;
case Length.PERCENT:
if (w.value() > 0
&& (!l.width().isPercent() || w.value() > l.width().value())) {
l.setWidth(w);
break;
}
}
} else {
if (effCol == 0 || section.cellAt(i, effCol - 1) != cell) {
// This spanning cell originates in this column.
// Ensure we have a min/max width of at least 1px for this column now.
l.setMinWidth(Math.max(l.minWidth(), getMinColWidth()));
l.setMaxWidth(Math.max(l.maxWidth(), getMinColWidth()));
_spanCells.add(cell);
}
}
}
}
l.setMaxWidth(Math.max(l.maxWidth(), l.minWidth()));
}
/*
* This method takes care of colspans. effWidth is the same as width for
* cells without colspans. If we have colspans, they get modified.
*/
private long calcEffectiveWidth(LayoutContext c) {
long tMaxWidth = 0;
Layout[] layoutStruct = _layoutStruct;
int nEffCols = layoutStruct.length;
int hspacing = _table.getStyle().getBorderHSpacing(c);
for (int i = 0; i < nEffCols; i++ ) {
layoutStruct[i].setEffWidth(layoutStruct[i].width());
layoutStruct[i].setEffMinWidth(layoutStruct[i].minWidth());
layoutStruct[i].setEffMaxWidth(layoutStruct[i].maxWidth());
}
Collections.sort(_spanCells, (c1, c2) -> c1.getStyle().getColSpan() - c2.getStyle().getColSpan());
for (TableCellBox cell : _spanCells) {
cell.calcMinMaxWidth(c);
int span = cell.getStyle().getColSpan();
Length w = cell.getOuterStyleOrColWidth(c);
if (w.value() == 0) {
w = new Length(); // make it Variable
}
int col = _table.colToEffCol(cell.getCol());
int lastCol = col;
int cMinWidth = cell.getMinWidth() + hspacing;
int cMaxWidth = cell.getMaxWidth() + hspacing;
int totalPercent = 0;
int minWidth = 0;
int maxWidth = 0;
boolean allColsArePercent = true;
boolean allColsAreFixed = true;
boolean haveVariable = false;
int fixedWidth = 0;
while (lastCol < nEffCols && span > 0) {
switch (layoutStruct[lastCol].width().type()) {
case Length.PERCENT:
totalPercent += layoutStruct[lastCol].width().value();
allColsAreFixed = false;
break;
case Length.FIXED:
if (layoutStruct[lastCol].width().value() > 0) {
fixedWidth += layoutStruct[lastCol].width().value();
allColsArePercent = false;
break;
}
// fall through
case Length.VARIABLE:
haveVariable = true;
// fall through
default:
// If the column is a percentage width, do not let the spanning cell overwrite the
// width value. This caused a mis-rendering on amazon.com.
// Sample snippet:
// <
// 1 2-3 1 2-3
if (!layoutStruct[lastCol].effWidth().isPercent()) {
layoutStruct[lastCol].setEffWidth(new Length());
allColsArePercent = false;
} else {
totalPercent += layoutStruct[lastCol].effWidth().value();
}
allColsAreFixed = false;
}
span -= _table.spanOfEffCol(lastCol);
minWidth += layoutStruct[lastCol].effMinWidth();
maxWidth += layoutStruct[lastCol].effMaxWidth();
lastCol++;
cMinWidth -= hspacing;
cMaxWidth -= hspacing;
}
// adjust table max width if needed
if (w.isPercent()) {
if (totalPercent > w.value() || allColsArePercent) {
// can't satify this condition, treat as variable
w = new Length();
} else {
int spanMax = Math.max(maxWidth, cMaxWidth);
tMaxWidth = Math.max(tMaxWidth, spanMax * 100 / w.value());
// all non percent columns in the span get percent
// values to sum up correctly.
long percentMissing = w.value() - totalPercent;
int totalWidth = 0;
for (int pos = col; pos < lastCol; pos++) {
if (!(layoutStruct[pos].width().isPercent())) {
totalWidth += layoutStruct[pos].effMaxWidth();
}
}
for (int pos = col; pos < lastCol && totalWidth > 0; pos++) {
if (!(layoutStruct[pos].width().isPercent())) {
long percent = percentMissing * layoutStruct[pos].effMaxWidth()
/ totalWidth;
totalWidth -= layoutStruct[pos].effMaxWidth();
percentMissing -= percent;
if (percent > 0) {
layoutStruct[pos].setEffWidth(new Length(percent,
Length.PERCENT));
} else {
layoutStruct[pos].setEffWidth(new Length());
}
}
}
}
}
// make sure minWidth and maxWidth of the spanning cell are honoured
if (cMinWidth > minWidth) {
if (allColsAreFixed) {
for (int pos = col; fixedWidth > 0 && pos < lastCol; pos++) {
long cWidth = Math.max(layoutStruct[pos].effMinWidth(), cMinWidth
* layoutStruct[pos].width().value() / fixedWidth);
fixedWidth -= layoutStruct[pos].width().value();
cMinWidth -= cWidth;
layoutStruct[pos].setEffMinWidth(cWidth);
}
} else if (allColsArePercent) {
int maxw = maxWidth;
int minw = minWidth;
int cminw = cMinWidth;
for (int pos = col; maxw > 0 && pos < lastCol; pos++) {
if (layoutStruct[pos].effWidth().isPercent()
&& layoutStruct[pos].effWidth().value() > 0
&& fixedWidth <= cMinWidth) {
long cWidth = layoutStruct[pos].effMinWidth();
cWidth = Math.max(cWidth, cminw
* layoutStruct[pos].effWidth().value() / totalPercent);
cWidth = Math.min(layoutStruct[pos].effMinWidth()
+ (cMinWidth - minw), cWidth);
maxw -= layoutStruct[pos].effMaxWidth();
minw -= layoutStruct[pos].effMinWidth();
cMinWidth -= cWidth;
layoutStruct[pos].setEffMinWidth(cWidth);
}
}
} else {
int maxw = maxWidth;
int minw = minWidth;
// Give min to variable first, to fixed second, and to
// others third.
for (int pos = col; maxw > 0 && pos < lastCol; pos++) {
if (layoutStruct[pos].width().isFixed() && haveVariable
&& fixedWidth <= cMinWidth) {
long cWidth = Math.max(layoutStruct[pos].effMinWidth(),
layoutStruct[pos].width().value());
fixedWidth -= layoutStruct[pos].width().value();
minw -= layoutStruct[pos].effMinWidth();
maxw -= layoutStruct[pos].effMaxWidth();
cMinWidth -= cWidth;
layoutStruct[pos].setEffMinWidth(cWidth);
}
}
for (int pos = col; maxw > 0 && pos < lastCol && minw < cMinWidth; pos++) {
if (!(layoutStruct[pos].width().isFixed() && haveVariable && fixedWidth <= cMinWidth)) {
long cWidth = Math.max(layoutStruct[pos].effMinWidth(), cMinWidth
* layoutStruct[pos].effMaxWidth() / maxw);
cWidth = Math.min(layoutStruct[pos].effMinWidth()
+ (cMinWidth - minw), cWidth);
maxw -= layoutStruct[pos].effMaxWidth();
minw -= layoutStruct[pos].effMinWidth();
cMinWidth -= cWidth;
layoutStruct[pos].setEffMinWidth(cWidth);
}
}
}
}
if (!w.isPercent()) {
if (cMaxWidth > maxWidth) {
for (int pos = col; maxWidth > 0 && pos < lastCol; pos++) {
long cWidth = Math.max(layoutStruct[pos].effMaxWidth(), cMaxWidth
* layoutStruct[pos].effMaxWidth() / maxWidth);
maxWidth -= layoutStruct[pos].effMaxWidth();
cMaxWidth -= cWidth;
layoutStruct[pos].setEffMaxWidth(cWidth);
}
}
} else {
for (int pos = col; pos < lastCol; pos++) {
layoutStruct[pos].setMaxWidth(Math.max(layoutStruct[pos].maxWidth(),
layoutStruct[pos].minWidth()));
}
}
}
return tMaxWidth;
}
private boolean shouldScaleColumns(TableBox table) {
return true;
}
@Override
public void calcMinMaxWidth(LayoutContext c) {
TableBox table = _table;
fullRecalc(c);
Layout[] layoutStruct = _layoutStruct;
long spanMaxWidth = calcEffectiveWidth(c);
long minWidth = 0;
long maxWidth = 0;
long maxPercent = 0;
long maxNonPercent = 0;
int remainingPercent = 100;
for (int i = 0; i < layoutStruct.length; i++) {
minWidth += layoutStruct[i].effMinWidth();
maxWidth += layoutStruct[i].effMaxWidth();
if (layoutStruct[i].effWidth().isPercent()) {
long percent = Math.min(layoutStruct[i].effWidth().value(), remainingPercent);
long pw = (layoutStruct[i].effMaxWidth() * 100) / Math.max(percent, 1);
remainingPercent -= percent;
maxPercent = Math.max(pw, maxPercent);
} else {
maxNonPercent += layoutStruct[i].effMaxWidth();
}
}
if (shouldScaleColumns(table)) {
maxNonPercent = (maxNonPercent * 100 + 50) / Math.max(remainingPercent, 1);
maxWidth = Math.max(maxNonPercent, maxWidth);
maxWidth = Math.max(maxWidth, maxPercent);
}
maxWidth = Math.max(maxWidth, spanMaxWidth);
int bs = table.marginsBordersPaddingAndSpacing(c, true);
minWidth += bs;
maxWidth += bs;
Length tw = table.getStyle().asLength(c, CSSName.WIDTH);
if (tw.isFixed() && tw.value() > 0) {
table.calcDimensions(c);
int width = table.getContentWidth() + table.marginsBordersPaddingAndSpacing(c, true);
minWidth = Math.max(minWidth, width);
maxWidth = minWidth;
}
table.setMaxWidth((int)Math.min(maxWidth, Length.MAX_WIDTH));
table.setMinWidth((int)Math.min(minWidth, Length.MAX_WIDTH));
}
@Override
public void layout(LayoutContext c) {
TableBox table = _table;
// table layout based on the values collected in the layout
// structure.
int tableWidth = table.getWidth() - table.marginsBordersPaddingAndSpacing(c, false);
int available = tableWidth;
int nEffCols = table.numEffCols();
boolean havePercent = false;
int numVariable = 0;
int numFixed = 0;
int totalVariable = 0;
int totalFixed = 0;
int totalPercent = 0;
int allocVariable = 0;
Layout[] layoutStruct = _layoutStruct;
// fill up every cell with it's minWidth
for (int i = 0; i < nEffCols; i++) {
long w = layoutStruct[i].effMinWidth();
layoutStruct[i].setCalcWidth(w);
available -= w;
Length width = layoutStruct[i].effWidth();
switch (width.type()) {
case Length.PERCENT:
havePercent = true;
totalPercent += width.value();
break;
case Length.FIXED:
numFixed++;
totalFixed += layoutStruct[i].effMaxWidth();
// fall through
break;
case Length.VARIABLE:
numVariable++;
totalVariable += layoutStruct[i].effMaxWidth();
allocVariable += w;
}
}
// allocate width to percent cols
if (available > 0 && havePercent) {
for (int i = 0; i < nEffCols; i++) {
Length width = layoutStruct[i].effWidth();
if (width.isPercent()) {
long w = Math.max(layoutStruct[i].effMinWidth(), width.minWidth(tableWidth));
available += layoutStruct[i].calcWidth() - w;
layoutStruct[i].setCalcWidth(w);
}
}
if (totalPercent > 100) {
// remove overallocated space from the last columns
int excess = tableWidth * (totalPercent - 100) / 100;
for (int i = nEffCols - 1; i >= 0; i--) {
if (layoutStruct[i].effWidth().isPercent()) {
long w = layoutStruct[i].calcWidth();
long reduction = Math.min(w, excess);
// the lines below might look inconsistent, but
// that's the way it's handled in mozilla
excess -= reduction;
long newWidth = Math.max(layoutStruct[i].effMinWidth(), w - reduction);
available += w - newWidth;
layoutStruct[i].setCalcWidth(newWidth);
// qDebug("col %d: reducing to %d px
// (reduction=%d)", i, newWidth, reduction );
}
}
}
}
// then allocate width to fixed cols
if (available > 0) {
for (int i = 0; i < nEffCols; ++i) {
Length width = layoutStruct[i].effWidth();
if (width.isFixed() && width.value() > layoutStruct[i].calcWidth()) {
available += layoutStruct[i].calcWidth() - width.value();
layoutStruct[i].setCalcWidth(width.value());
}
}
}
// now satisfy variable
if (available > 0 && numVariable > 0) {
available += allocVariable; // this gets redistributed
// qDebug("redistributing %dpx to %d variable columns.
// totalVariable=%d", available, numVariable, totalVariable );
for (int i = 0; i < nEffCols; i++) {
Length width = layoutStruct[i].effWidth();
if (width.isVariable() && totalVariable != 0) {
long w = Math.max(layoutStruct[i].calcWidth(), available
* layoutStruct[i].effMaxWidth() / totalVariable);
available -= w;
totalVariable -= layoutStruct[i].effMaxWidth();
layoutStruct[i].setCalcWidth(w);
}
}
}
// spread over fixed colums
if (available > 0 && numFixed > 0) {
// still have some width to spread, distribute to fixed columns
for (int i = 0; i < nEffCols; i++) {
Length width = layoutStruct[i].effWidth();
if (width.isFixed()) {
long w = available * layoutStruct[i].effMaxWidth() / totalFixed;
available -= w;
totalFixed -= layoutStruct[i].effMaxWidth();
layoutStruct[i].setCalcWidth(layoutStruct[i].calcWidth() + w);
}
}
}
// spread over percent colums
if (available > 0 && havePercent && totalPercent < 100) {
// still have some width to spread, distribute weighted to
// percent columns
for (int i = 0; i < nEffCols; i++) {
Length width = layoutStruct[i].effWidth();
if (width.isPercent()) {
long w = available * width.value() / totalPercent;
available -= w;
totalPercent -= width.value();
layoutStruct[i].setCalcWidth(layoutStruct[i].calcWidth() + w);
if (available == 0 || totalPercent == 0) {
break;
}
}
}
}
// spread over the rest
if (available > 0) {
int total = nEffCols;
// still have some width to spread
int i = nEffCols;
while (i-- > 0) {
int w = available / total;
available -= w;
total--;
layoutStruct[i].setCalcWidth(layoutStruct[i].calcWidth() + w);
}
}
// if we have overallocated, reduce every cell according to the
// difference between desired width and minwidth
// this seems to produce to the pixel exaxt results with IE. Wonder
// is some of this also holds for width distributing.
if (available < 0) {
// Need to reduce cells with the following prioritization:
// (1) Variable
// (2) Relative
// (3) Fixed
// (4) Percent
// This is basically the reverse of how we grew the cells.
if (available < 0) {
int mw = 0;
for (int i = nEffCols - 1; i >= 0; i--) {
Length width = layoutStruct[i].effWidth();
if (width.isVariable())
mw += layoutStruct[i].calcWidth() - layoutStruct[i].effMinWidth();
}
for (int i = nEffCols - 1; i >= 0 && mw > 0; i--) {
Length width = layoutStruct[i].effWidth();
if (width.isVariable()) {
long minMaxDiff = layoutStruct[i].calcWidth()
- layoutStruct[i].effMinWidth();
long reduce = available * minMaxDiff / mw;
layoutStruct[i].setCalcWidth(layoutStruct[i].calcWidth() + reduce);
available -= reduce;
mw -= minMaxDiff;
if (available >= 0)
break;
}
}
}
if (available < 0) {
int mw = 0;
for (int i = nEffCols - 1; i >= 0; i--) {
Length width = layoutStruct[i].effWidth();
if (width.isFixed())
mw += layoutStruct[i].calcWidth() - layoutStruct[i].effMinWidth();
}
for (int i = nEffCols - 1; i >= 0 && mw > 0; i--) {
Length width = layoutStruct[i].effWidth();
if (width.isFixed()) {
long minMaxDiff = layoutStruct[i].calcWidth()
- layoutStruct[i].effMinWidth();
long reduce = available * minMaxDiff / mw;
layoutStruct[i].setCalcWidth(layoutStruct[i].calcWidth() + reduce);
available -= reduce;
mw -= minMaxDiff;
if (available >= 0)
break;
}
}
}
if (available < 0) {
int mw = 0;
for (int i = nEffCols - 1; i >= 0; i--) {
Length width = layoutStruct[i].effWidth();
if (width.isPercent())
mw += layoutStruct[i].calcWidth() - layoutStruct[i].effMinWidth();
}
for (int i = nEffCols - 1; i >= 0 && mw > 0; i--) {
Length width = layoutStruct[i].effWidth();
if (width.isPercent()) {
long minMaxDiff = layoutStruct[i].calcWidth()
- layoutStruct[i].effMinWidth();
long reduce = available * minMaxDiff / mw;
layoutStruct[i].setCalcWidth(layoutStruct[i].calcWidth() + reduce);
available -= reduce;
mw -= minMaxDiff;
if (available >= 0)
break;
}
}
}
}
int pos = 0;
int hspacing = _table.getStyle().getBorderHSpacing(c);
int[] columnPos = new int[nEffCols + 1];
for (int i = 0; i < nEffCols; i++) {
columnPos[i] = pos;
pos += layoutStruct[i].calcWidth() + hspacing;
}
columnPos[columnPos.length - 1] = pos;
_table.setColumnPos(columnPos);
}
protected static class Layout {
private Length _width = new Length();
private Length _effWidth = new Length();
private long _minWidth = 1;
private long _maxWidth = 1;
private long _effMinWidth = 0;
private long _effMaxWidth = 0;
private long _calcWidth = 0;
public Layout() {
}
public Length width() {
return _width;
}
public void setWidth(Length l) {
_width = l;
}
public Length effWidth() {
return _effWidth;
}
public void setEffWidth(Length l) {
_effWidth = l;
}
public long minWidth() {
return _minWidth;
}
public void setMinWidth(long i) {
_minWidth = i;
}
public long maxWidth() {
return _maxWidth;
}
public void setMaxWidth(long i) {
_maxWidth = i;
}
public long effMinWidth() {
return _effMinWidth;
}
public void setEffMinWidth(long i) {
_effMinWidth = i;
}
public long effMaxWidth() {
return _effMaxWidth;
}
public void setEffMaxWidth(long i) {
_effMaxWidth = i;
}
public long calcWidth() {
return _calcWidth;
}
public void setCalcWidth(long i) {
_calcWidth = i;
}
}
}
}