| /* |
| * Copyright (C) 2003, 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. |
| * |
| * 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. |
| */ |
| |
| #include "config.h" |
| #include "InlineFlowBox.h" |
| |
| #include "CachedImage.h" |
| #include "Document.h" |
| #include "EllipsisBox.h" |
| #include "GraphicsContext.h" |
| #include "InlineTextBox.h" |
| #include "HitTestResult.h" |
| #include "RootInlineBox.h" |
| #include "RenderBlock.h" |
| #include "RenderFlow.h" |
| #include "RenderListMarker.h" |
| #include "RenderTableCell.h" |
| #include "RootInlineBox.h" |
| #include "Text.h" |
| |
| #include <math.h> |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| #ifndef NDEBUG |
| |
| InlineFlowBox::~InlineFlowBox() |
| { |
| if (!m_hasBadChildList) |
| for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) |
| child->setHasBadParent(); |
| } |
| |
| #endif |
| |
| RenderFlow* InlineFlowBox::flowObject() |
| { |
| return static_cast<RenderFlow*>(m_object); |
| } |
| |
| int InlineFlowBox::marginLeft() |
| { |
| if (!includeLeftEdge()) |
| return 0; |
| |
| Length margin = object()->style()->marginLeft(); |
| if (margin.isAuto()) |
| return 0; |
| if (margin.isFixed()) |
| return margin.value(); |
| return object()->marginLeft(); |
| } |
| |
| int InlineFlowBox::marginRight() |
| { |
| if (!includeRightEdge()) |
| return 0; |
| |
| Length margin = object()->style()->marginRight(); |
| if (margin.isAuto()) |
| return 0; |
| if (margin.isFixed()) |
| return margin.value(); |
| return object()->marginRight(); |
| } |
| |
| int InlineFlowBox::marginBorderPaddingLeft() |
| { |
| return marginLeft() + borderLeft() + paddingLeft(); |
| } |
| |
| int InlineFlowBox::marginBorderPaddingRight() |
| { |
| return marginRight() + borderRight() + paddingRight(); |
| } |
| |
| int InlineFlowBox::getFlowSpacingWidth() |
| { |
| int totWidth = marginBorderPaddingLeft() + marginBorderPaddingRight(); |
| for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { |
| if (curr->isInlineFlowBox()) |
| totWidth += static_cast<InlineFlowBox*>(curr)->getFlowSpacingWidth(); |
| } |
| return totWidth; |
| } |
| |
| void InlineFlowBox::addToLine(InlineBox* child) |
| { |
| ASSERT(!child->parent()); |
| ASSERT(!child->nextOnLine()); |
| ASSERT(!child->prevOnLine()); |
| checkConsistency(); |
| |
| child->setParent(this); |
| if (!m_firstChild) { |
| m_firstChild = child; |
| m_lastChild = child; |
| } else { |
| m_lastChild->setNextOnLine(child); |
| child->setPrevOnLine(m_lastChild); |
| m_lastChild = child; |
| } |
| child->setFirstLineStyleBit(m_firstLine); |
| if (child->isText()) |
| m_hasTextChildren = true; |
| if (child->object()->selectionState() != RenderObject::SelectionNone) |
| root()->setHasSelectedChildren(true); |
| |
| checkConsistency(); |
| } |
| |
| void InlineFlowBox::removeChild(InlineBox* child) |
| { |
| checkConsistency(); |
| |
| if (!m_dirty) |
| dirtyLineBoxes(); |
| |
| root()->childRemoved(child); |
| |
| if (child == m_firstChild) |
| m_firstChild = child->nextOnLine(); |
| if (child == m_lastChild) |
| m_lastChild = child->prevOnLine(); |
| if (child->nextOnLine()) |
| child->nextOnLine()->setPrevOnLine(child->prevOnLine()); |
| if (child->prevOnLine()) |
| child->prevOnLine()->setNextOnLine(child->nextOnLine()); |
| |
| child->setParent(0); |
| |
| checkConsistency(); |
| } |
| |
| void InlineFlowBox::deleteLine(RenderArena* arena) |
| { |
| InlineBox* child = firstChild(); |
| InlineBox* next = 0; |
| while (child) { |
| ASSERT(this == child->parent()); |
| next = child->nextOnLine(); |
| #ifndef NDEBUG |
| child->setParent(0); |
| #endif |
| child->deleteLine(arena); |
| child = next; |
| } |
| #ifndef NDEBUG |
| m_firstChild = 0; |
| m_lastChild = 0; |
| #endif |
| |
| static_cast<RenderFlow*>(m_object)->removeLineBox(this); |
| destroy(arena); |
| } |
| |
| void InlineFlowBox::extractLine() |
| { |
| if (!m_extracted) |
| static_cast<RenderFlow*>(m_object)->extractLineBox(this); |
| for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) |
| child->extractLine(); |
| } |
| |
| void InlineFlowBox::attachLine() |
| { |
| if (m_extracted) |
| static_cast<RenderFlow*>(m_object)->attachLineBox(this); |
| for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) |
| child->attachLine(); |
| } |
| |
| void InlineFlowBox::adjustPosition(int dx, int dy) |
| { |
| InlineRunBox::adjustPosition(dx, dy); |
| for (InlineBox* child = firstChild(); child; child = child->nextOnLine()) |
| child->adjustPosition(dx, dy); |
| } |
| |
| bool InlineFlowBox::onEndChain(RenderObject* endObject) |
| { |
| if (!endObject) |
| return false; |
| |
| if (endObject == object()) |
| return true; |
| |
| RenderObject* curr = endObject; |
| RenderObject* parent = curr->parent(); |
| while (parent && !parent->isRenderBlock()) { |
| if (parent->lastChild() != curr || parent == object()) |
| return false; |
| |
| curr = parent; |
| parent = curr->parent(); |
| } |
| |
| return true; |
| } |
| |
| void InlineFlowBox::determineSpacingForFlowBoxes(bool lastLine, RenderObject* endObject) |
| { |
| // All boxes start off open. They will not apply any margins/border/padding on |
| // any side. |
| bool includeLeftEdge = false; |
| bool includeRightEdge = false; |
| |
| RenderFlow* flow = static_cast<RenderFlow*>(object()); |
| |
| if (!flow->firstChild()) |
| includeLeftEdge = includeRightEdge = true; // Empty inlines never split across lines. |
| else if (parent()) { // The root inline box never has borders/margins/padding. |
| bool ltr = flow->style()->direction() == LTR; |
| |
| // Check to see if all initial lines are unconstructed. If so, then |
| // we know the inline began on this line. |
| if (!flow->firstLineBox()->isConstructed()) { |
| if (ltr && flow->firstLineBox() == this) |
| includeLeftEdge = true; |
| else if (!ltr && flow->lastLineBox() == this) |
| includeRightEdge = true; |
| } |
| |
| // In order to determine if the inline ends on this line, we check three things: |
| // (1) If we are the last line and we don't have a continuation(), then we can |
| // close up. |
| // (2) If the last line box for the flow has an object following it on the line (ltr, |
| // reverse for rtl), then the inline has closed. |
| // (3) The line may end on the inline. If we are the last child (climbing up |
| // the end object's chain), then we just closed as well. |
| if (!flow->lastLineBox()->isConstructed()) { |
| if (ltr) { |
| if (!nextLineBox() && |
| ((lastLine && !object()->continuation()) || nextOnLineExists() || onEndChain(endObject))) |
| includeRightEdge = true; |
| } else { |
| if ((!prevLineBox() || prevLineBox()->isConstructed()) && |
| ((lastLine && !object()->continuation()) || prevOnLineExists() || onEndChain(endObject))) |
| includeLeftEdge = true; |
| } |
| } |
| } |
| |
| setEdges(includeLeftEdge, includeRightEdge); |
| |
| // Recur into our children. |
| for (InlineBox* currChild = firstChild(); currChild; currChild = currChild->nextOnLine()) { |
| if (currChild->isInlineFlowBox()) { |
| InlineFlowBox* currFlow = static_cast<InlineFlowBox*>(currChild); |
| currFlow->determineSpacingForFlowBoxes(lastLine, endObject); |
| } |
| } |
| } |
| |
| int InlineFlowBox::placeBoxesHorizontally(int x, int& leftPosition, int& rightPosition, bool& needsWordSpacing) |
| { |
| // Set our x position. |
| setXPos(x); |
| |
| int boxShadowLeft = 0; |
| int boxShadowRight = 0; |
| for (ShadowData* boxShadow = object()->style(m_firstLine)->boxShadow(); boxShadow; boxShadow = boxShadow->next) { |
| boxShadowLeft = min(boxShadow->x - boxShadow->blur, boxShadowLeft); |
| boxShadowRight = max(boxShadow->x + boxShadow->blur, boxShadowRight); |
| } |
| leftPosition = min(x + boxShadowLeft, leftPosition); |
| |
| int startX = x; |
| x += borderLeft() + paddingLeft(); |
| |
| for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { |
| if (curr->object()->isText()) { |
| InlineTextBox* text = static_cast<InlineTextBox*>(curr); |
| RenderText* rt = static_cast<RenderText*>(text->object()); |
| if (rt->textLength()) { |
| if (needsWordSpacing && isSpaceOrNewline(rt->characters()[text->start()])) |
| x += rt->style(m_firstLine)->font().wordSpacing(); |
| needsWordSpacing = !isSpaceOrNewline(rt->characters()[text->end()]); |
| } |
| text->setXPos(x); |
| |
| int strokeOverflow = static_cast<int>(ceilf(rt->style()->textStrokeWidth() / 2.0f)); |
| |
| // If letter-spacing is negative, we should factor that into right overflow. (Even in RTL, letter-spacing is |
| // applied to the right, so this is not an issue with left overflow. |
| int letterSpacing = min(0, (int)rt->style(m_firstLine)->font().letterSpacing()); |
| |
| int leftGlyphOverflow = -strokeOverflow; |
| int rightGlyphOverflow = strokeOverflow - letterSpacing; |
| |
| int visualOverflowLeft = leftGlyphOverflow; |
| int visualOverflowRight = rightGlyphOverflow; |
| for (ShadowData* shadow = rt->style()->textShadow(); shadow; shadow = shadow->next) { |
| visualOverflowLeft = min(visualOverflowLeft, shadow->x - shadow->blur + leftGlyphOverflow); |
| visualOverflowRight = max(visualOverflowRight, shadow->x + shadow->blur + rightGlyphOverflow); |
| } |
| |
| leftPosition = min(x + visualOverflowLeft, leftPosition); |
| rightPosition = max(x + text->width() + visualOverflowRight, rightPosition); |
| m_maxHorizontalVisualOverflow = max(max(visualOverflowRight, -visualOverflowLeft), m_maxHorizontalVisualOverflow); |
| x += text->width(); |
| } else { |
| if (curr->object()->isPositioned()) { |
| if (curr->object()->parent()->style()->direction() == LTR) |
| curr->setXPos(x); |
| else |
| // Our offset that we cache needs to be from the edge of the right border box and |
| // not the left border box. We have to subtract |x| from the width of the block |
| // (which can be obtained from the root line box). |
| curr->setXPos(root()->object()->width()-x); |
| continue; // The positioned object has no effect on the width. |
| } |
| if (curr->object()->isInlineFlow()) { |
| InlineFlowBox* flow = static_cast<InlineFlowBox*>(curr); |
| if (curr->object()->isCompact()) { |
| int ignoredX = x; |
| flow->placeBoxesHorizontally(ignoredX, leftPosition, rightPosition, needsWordSpacing); |
| } else { |
| x += flow->marginLeft(); |
| x = flow->placeBoxesHorizontally(x, leftPosition, rightPosition, needsWordSpacing); |
| x += flow->marginRight(); |
| } |
| } else if (!curr->object()->isCompact() && (!curr->object()->isListMarker() || static_cast<RenderListMarker*>(curr->object())->isInside())) { |
| x += curr->object()->marginLeft(); |
| curr->setXPos(x); |
| leftPosition = min(x + curr->object()->overflowLeft(false), leftPosition); |
| rightPosition = max(x + curr->object()->overflowWidth(false), rightPosition); |
| x += curr->width() + curr->object()->marginRight(); |
| } |
| } |
| } |
| |
| x += borderRight() + paddingRight(); |
| setWidth(x - startX); |
| rightPosition = max(xPos() + width() + boxShadowRight, rightPosition); |
| |
| return x; |
| } |
| |
| void InlineFlowBox::verticallyAlignBoxes(int& heightOfBlock) |
| { |
| int maxPositionTop = 0; |
| int maxPositionBottom = 0; |
| int maxAscent = 0; |
| int maxDescent = 0; |
| |
| // Figure out if we're in strict mode. Note that we can't simply use !style()->htmlHacks(), |
| // because that would match almost strict mode as well. |
| RenderObject* curr = object(); |
| while (curr && !curr->element()) |
| curr = curr->container(); |
| bool strictMode = (curr && curr->document()->inStrictMode()); |
| |
| computeLogicalBoxHeights(maxPositionTop, maxPositionBottom, maxAscent, maxDescent, strictMode); |
| |
| if (maxAscent + maxDescent < max(maxPositionTop, maxPositionBottom)) |
| adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom); |
| |
| int maxHeight = maxAscent + maxDescent; |
| int topPosition = heightOfBlock; |
| int bottomPosition = heightOfBlock; |
| int selectionTop = heightOfBlock; |
| int selectionBottom = heightOfBlock; |
| placeBoxesVertically(heightOfBlock, maxHeight, maxAscent, strictMode, topPosition, bottomPosition, selectionTop, selectionBottom); |
| |
| setVerticalOverflowPositions(topPosition, bottomPosition); |
| setVerticalSelectionPositions(selectionTop, selectionBottom); |
| |
| // Shrink boxes with no text children in quirks and almost strict mode. |
| if (!strictMode) |
| shrinkBoxesWithNoTextChildren(topPosition, bottomPosition); |
| |
| heightOfBlock += maxHeight; |
| } |
| |
| void InlineFlowBox::adjustMaxAscentAndDescent(int& maxAscent, int& maxDescent, |
| int maxPositionTop, int maxPositionBottom) |
| { |
| for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { |
| // The computed lineheight needs to be extended for the |
| // positioned elements |
| if (curr->object()->isPositioned()) |
| continue; // Positioned placeholders don't affect calculations. |
| if (curr->yPos() == PositionTop || curr->yPos() == PositionBottom) { |
| if (curr->yPos() == PositionTop) { |
| if (maxAscent + maxDescent < curr->height()) |
| maxDescent = curr->height() - maxAscent; |
| } |
| else { |
| if (maxAscent + maxDescent < curr->height()) |
| maxAscent = curr->height() - maxDescent; |
| } |
| |
| if (maxAscent + maxDescent >= max(maxPositionTop, maxPositionBottom)) |
| break; |
| } |
| |
| if (curr->isInlineFlowBox()) |
| static_cast<InlineFlowBox*>(curr)->adjustMaxAscentAndDescent(maxAscent, maxDescent, maxPositionTop, maxPositionBottom); |
| } |
| } |
| |
| void InlineFlowBox::computeLogicalBoxHeights(int& maxPositionTop, int& maxPositionBottom, |
| int& maxAscent, int& maxDescent, bool strictMode) |
| { |
| if (isRootInlineBox()) { |
| // Examine our root box. |
| setHeight(object()->lineHeight(m_firstLine, true)); |
| bool isTableCell = object()->isTableCell(); |
| if (isTableCell) { |
| RenderTableCell* tableCell = static_cast<RenderTableCell*>(object()); |
| setBaseline(tableCell->RenderBlock::baselinePosition(m_firstLine, true)); |
| } |
| else |
| setBaseline(object()->baselinePosition(m_firstLine, true)); |
| if (hasTextChildren() || strictMode) { |
| int ascent = baseline(); |
| int descent = height() - ascent; |
| if (maxAscent < ascent) |
| maxAscent = ascent; |
| if (maxDescent < descent) |
| maxDescent = descent; |
| } |
| } |
| |
| for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { |
| if (curr->object()->isPositioned()) |
| continue; // Positioned placeholders don't affect calculations. |
| |
| curr->setHeight(curr->object()->lineHeight(m_firstLine)); |
| curr->setBaseline(curr->object()->baselinePosition(m_firstLine)); |
| curr->setYPos(curr->object()->verticalPositionHint(m_firstLine)); |
| if (curr->yPos() == PositionTop) { |
| if (maxPositionTop < curr->height()) |
| maxPositionTop = curr->height(); |
| } |
| else if (curr->yPos() == PositionBottom) { |
| if (maxPositionBottom < curr->height()) |
| maxPositionBottom = curr->height(); |
| } |
| else if (curr->hasTextChildren() || curr->object()->hasHorizontalBordersOrPadding() || strictMode) { |
| int ascent = curr->baseline() - curr->yPos(); |
| int descent = curr->height() - ascent; |
| if (maxAscent < ascent) |
| maxAscent = ascent; |
| if (maxDescent < descent) |
| maxDescent = descent; |
| } |
| |
| if (curr->isInlineFlowBox()) |
| static_cast<InlineFlowBox*>(curr)->computeLogicalBoxHeights(maxPositionTop, maxPositionBottom, maxAscent, maxDescent, strictMode); |
| } |
| } |
| |
| void InlineFlowBox::placeBoxesVertically(int y, int maxHeight, int maxAscent, bool strictMode, |
| int& topPosition, int& bottomPosition, int& selectionTop, int& selectionBottom) |
| { |
| if (isRootInlineBox()) |
| setYPos(y + maxAscent - baseline());// Place our root box. |
| |
| for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { |
| if (curr->object()->isPositioned()) |
| continue; // Positioned placeholders don't affect calculations. |
| |
| // Adjust boxes to use their real box y/height and not the logical height (as dictated by |
| // line-height). |
| if (curr->isInlineFlowBox()) |
| static_cast<InlineFlowBox*>(curr)->placeBoxesVertically(y, maxHeight, maxAscent, strictMode, topPosition, bottomPosition, selectionTop, selectionBottom); |
| |
| bool childAffectsTopBottomPos = true; |
| if (curr->yPos() == PositionTop) |
| curr->setYPos(y); |
| else if (curr->yPos() == PositionBottom) |
| curr->setYPos(y + maxHeight - curr->height()); |
| else { |
| if (!curr->hasTextChildren() && !curr->object()->hasHorizontalBordersOrPadding() && !strictMode) |
| childAffectsTopBottomPos = false; |
| curr->setYPos(curr->yPos() + y + maxAscent - curr->baseline()); |
| } |
| |
| int newY = curr->yPos(); |
| int newHeight = curr->height(); |
| int newBaseline = curr->baseline(); |
| int overflowTop = 0; |
| int overflowBottom = 0; |
| if (curr->isText() || curr->isInlineFlowBox()) { |
| const Font& font = curr->object()->style(m_firstLine)->font(); |
| newBaseline = font.ascent(); |
| newY += curr->baseline() - newBaseline; |
| newHeight = newBaseline + font.descent(); |
| for (ShadowData* shadow = curr->object()->style()->textShadow(); shadow; shadow = shadow->next) { |
| overflowTop = min(overflowTop, shadow->y - shadow->blur); |
| overflowBottom = max(overflowBottom, shadow->y + shadow->blur); |
| } |
| |
| for (ShadowData* boxShadow = curr->object()->style(m_firstLine)->boxShadow(); boxShadow; boxShadow = boxShadow->next) { |
| overflowTop = min(overflowTop, boxShadow->y - boxShadow->blur); |
| overflowBottom = max(overflowBottom, boxShadow->y + boxShadow->blur); |
| } |
| |
| for (ShadowData* textShadow = curr->object()->style(m_firstLine)->textShadow(); textShadow; textShadow = textShadow->next) { |
| overflowTop = min(overflowTop, textShadow->y - textShadow->blur); |
| overflowBottom = max(overflowBottom, textShadow->y + textShadow->blur); |
| } |
| |
| if (curr->object()->hasReflection()) { |
| overflowTop = min(overflowTop, curr->object()->reflectionBox().y()); |
| overflowBottom = max(overflowBottom, curr->object()->reflectionBox().bottom()); |
| } |
| |
| if (curr->isInlineFlowBox()) { |
| newHeight += curr->object()->borderTop() + curr->object()->paddingTop() + |
| curr->object()->borderBottom() + curr->object()->paddingBottom(); |
| newY -= curr->object()->borderTop() + curr->object()->paddingTop(); |
| newBaseline += curr->object()->borderTop() + curr->object()->paddingTop(); |
| } |
| } else if (!curr->object()->isBR()) { |
| newY += curr->object()->marginTop(); |
| newHeight = curr->height() - (curr->object()->marginTop() + curr->object()->marginBottom()); |
| overflowTop = curr->object()->overflowTop(false); |
| overflowBottom = curr->object()->overflowHeight(false) - newHeight; |
| } |
| |
| curr->setYPos(newY); |
| curr->setHeight(newHeight); |
| curr->setBaseline(newBaseline); |
| |
| if (childAffectsTopBottomPos) { |
| selectionTop = min(selectionTop, newY); |
| selectionBottom = max(selectionBottom, newY + newHeight); |
| topPosition = min(topPosition, newY + overflowTop); |
| bottomPosition = max(bottomPosition, newY + newHeight + overflowBottom); |
| } |
| } |
| |
| if (isRootInlineBox()) { |
| const Font& font = object()->style(m_firstLine)->font(); |
| setHeight(font.ascent() + font.descent()); |
| setYPos(yPos() + baseline() - font.ascent()); |
| setBaseline(font.ascent()); |
| if (hasTextChildren() || strictMode) { |
| selectionTop = min(selectionTop, yPos()); |
| selectionBottom = max(selectionBottom, yPos() + height()); |
| } |
| } |
| } |
| |
| void InlineFlowBox::shrinkBoxesWithNoTextChildren(int topPos, int bottomPos) |
| { |
| // First shrink our kids. |
| for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { |
| if (curr->object()->isPositioned()) |
| continue; // Positioned placeholders don't affect calculations. |
| |
| if (curr->isInlineFlowBox()) |
| static_cast<InlineFlowBox*>(curr)->shrinkBoxesWithNoTextChildren(topPos, bottomPos); |
| } |
| |
| // See if we have text children. If not, then we need to shrink ourselves to fit on the line. |
| if (!hasTextChildren() && !object()->hasHorizontalBordersOrPadding()) { |
| if (yPos() < topPos) |
| setYPos(topPos); |
| if (yPos() + height() > bottomPos) |
| setHeight(bottomPos - yPos()); |
| if (baseline() > height()) |
| setBaseline(height()); |
| } |
| } |
| |
| bool InlineFlowBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int x, int y, int tx, int ty) |
| { |
| // Check children first. |
| for (InlineBox* curr = lastChild(); curr; curr = curr->prevOnLine()) { |
| if (!curr->object()->hasLayer() && curr->nodeAtPoint(request, result, x, y, tx, ty)) { |
| object()->updateHitTestResult(result, IntPoint(x - tx, y - ty)); |
| return true; |
| } |
| } |
| |
| // Now check ourselves. |
| IntRect rect(tx + m_x, ty + m_y, m_width, m_height); |
| if (object()->style()->visibility() == VISIBLE && rect.contains(x, y)) { |
| object()->updateHitTestResult(result, IntPoint(x - tx, y - ty)); // Don't add in m_x or m_y here, we want coords in the containing block's space. |
| return true; |
| } |
| |
| return false; |
| } |
| |
| void InlineFlowBox::paint(RenderObject::PaintInfo& paintInfo, int tx, int ty) |
| { |
| int xPos = tx + m_x - object()->maximalOutlineSize(paintInfo.phase); |
| int w = width() + 2 * object()->maximalOutlineSize(paintInfo.phase); |
| int shadowLeft = 0; |
| int shadowRight = 0; |
| for (ShadowData* boxShadow = object()->style(m_firstLine)->boxShadow(); boxShadow; boxShadow = boxShadow->next) { |
| shadowLeft = min(boxShadow->x - boxShadow->blur, shadowLeft); |
| shadowRight = max(boxShadow->x + boxShadow->blur, shadowRight); |
| } |
| for (ShadowData* textShadow = object()->style(m_firstLine)->textShadow(); textShadow; textShadow = textShadow->next) { |
| shadowLeft = min(textShadow->x - textShadow->blur, shadowLeft); |
| shadowRight = max(textShadow->x + textShadow->blur, shadowRight); |
| } |
| xPos += shadowLeft; |
| w += -shadowLeft + shadowRight; |
| bool intersectsDamageRect = xPos < paintInfo.rect.right() && xPos + w > paintInfo.rect.x(); |
| |
| if (intersectsDamageRect && paintInfo.phase != PaintPhaseChildOutlines) { |
| if (paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) { |
| // Add ourselves to the paint info struct's list of inlines that need to paint their |
| // outlines. |
| if (object()->style()->visibility() == VISIBLE && object()->hasOutline() && !isRootInlineBox()) { |
| if ((object()->continuation() || object()->isInlineContinuation()) && !object()->hasLayer()) { |
| // Add ourselves to the containing block of the entire continuation so that it can |
| // paint us atomically. |
| RenderBlock* block = object()->containingBlock()->containingBlock(); |
| block->addContinuationWithOutline(static_cast<RenderFlow*>(object()->element()->renderer())); |
| } else if (!object()->isInlineContinuation()) |
| paintInfo.outlineObjects->add(flowObject()); |
| } |
| } else if (paintInfo.phase == PaintPhaseMask) { |
| paintMask(paintInfo, tx, ty); |
| return; |
| } else { |
| // 1. Paint our background, border and box-shadow. |
| paintBoxDecorations(paintInfo, tx, ty); |
| |
| // 2. Paint our underline and overline. |
| paintTextDecorations(paintInfo, tx, ty, false); |
| } |
| } |
| |
| if (paintInfo.phase == PaintPhaseMask) |
| return; |
| |
| PaintPhase paintPhase = paintInfo.phase == PaintPhaseChildOutlines ? PaintPhaseOutline : paintInfo.phase; |
| RenderObject::PaintInfo childInfo(paintInfo); |
| childInfo.phase = paintPhase; |
| childInfo.paintingRoot = object()->paintingRootForChildren(paintInfo); |
| |
| // 3. Paint our children. |
| if (paintPhase != PaintPhaseSelfOutline) { |
| for (InlineBox* curr = firstChild(); curr; curr = curr->nextOnLine()) { |
| if (!curr->object()->hasLayer()) |
| curr->paint(childInfo, tx, ty); |
| } |
| } |
| |
| // 4. Paint our strike-through |
| if (intersectsDamageRect && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) |
| paintTextDecorations(paintInfo, tx, ty, true); |
| } |
| |
| void InlineFlowBox::paintFillLayers(const RenderObject::PaintInfo& paintInfo, const Color& c, const FillLayer* fillLayer, |
| int my, int mh, int _tx, int _ty, int w, int h, CompositeOperator op) |
| { |
| if (!fillLayer) |
| return; |
| paintFillLayers(paintInfo, c, fillLayer->next(), my, mh, _tx, _ty, w, h, op); |
| paintFillLayer(paintInfo, c, fillLayer, my, mh, _tx, _ty, w, h, op); |
| } |
| |
| void InlineFlowBox::paintFillLayer(const RenderObject::PaintInfo& paintInfo, const Color& c, const FillLayer* fillLayer, |
| int my, int mh, int tx, int ty, int w, int h, CompositeOperator op) |
| { |
| StyleImage* img = fillLayer->image(); |
| bool hasFillImage = img && img->canRender(object()->style()->effectiveZoom()); |
| if ((!hasFillImage && !object()->style()->hasBorderRadius()) || (!prevLineBox() && !nextLineBox()) || !parent()) |
| object()->paintFillLayerExtended(paintInfo, c, fillLayer, my, mh, tx, ty, w, h, this, op); |
| else { |
| // We have a fill image that spans multiple lines. |
| // We need to adjust _tx and _ty by the width of all previous lines. |
| // Think of background painting on inlines as though you had one long line, a single continuous |
| // strip. Even though that strip has been broken up across multiple lines, you still paint it |
| // as though you had one single line. This means each line has to pick up the background where |
| // the previous line left off. |
| // FIXME: What the heck do we do with RTL here? The math we're using is obviously not right, |
| // but it isn't even clear how this should work at all. |
| int xOffsetOnLine = 0; |
| for (InlineRunBox* curr = prevLineBox(); curr; curr = curr->prevLineBox()) |
| xOffsetOnLine += curr->width(); |
| int startX = tx - xOffsetOnLine; |
| int totalWidth = xOffsetOnLine; |
| for (InlineRunBox* curr = this; curr; curr = curr->nextLineBox()) |
| totalWidth += curr->width(); |
| paintInfo.context->save(); |
| paintInfo.context->clip(IntRect(tx, ty, width(), height())); |
| object()->paintFillLayerExtended(paintInfo, c, fillLayer, my, mh, startX, ty, totalWidth, h, this, op); |
| paintInfo.context->restore(); |
| } |
| } |
| |
| void InlineFlowBox::paintBoxShadow(GraphicsContext* context, RenderStyle* s, int tx, int ty, int w, int h) |
| { |
| if ((!prevLineBox() && !nextLineBox()) || !parent()) |
| object()->paintBoxShadow(context, tx, ty, w, h, s); |
| else { |
| // FIXME: We can do better here in the multi-line case. We want to push a clip so that the shadow doesn't |
| // protrude incorrectly at the edges, and we want to possibly include shadows cast from the previous/following lines |
| object()->paintBoxShadow(context, tx, ty, w, h, s, includeLeftEdge(), includeRightEdge()); |
| } |
| } |
| |
| void InlineFlowBox::paintBoxDecorations(RenderObject::PaintInfo& paintInfo, int tx, int ty) |
| { |
| if (!object()->shouldPaintWithinRoot(paintInfo) || object()->style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseForeground) |
| return; |
| |
| // Move x/y to our coordinates. |
| tx += m_x; |
| ty += m_y; |
| |
| int w = width(); |
| int h = height(); |
| |
| int my = max(ty, paintInfo.rect.y()); |
| int mh; |
| if (ty < paintInfo.rect.y()) |
| mh = max(0, h - (paintInfo.rect.y() - ty)); |
| else |
| mh = min(paintInfo.rect.height(), h); |
| |
| GraphicsContext* context = paintInfo.context; |
| |
| // You can use p::first-line to specify a background. If so, the root line boxes for |
| // a line may actually have to paint a background. |
| RenderStyle* styleToUse = object()->style(m_firstLine); |
| if ((!parent() && m_firstLine && styleToUse != object()->style()) || (parent() && object()->hasBoxDecorations())) { |
| // Shadow comes first and is behind the background and border. |
| if (styleToUse->boxShadow()) |
| paintBoxShadow(context, styleToUse, tx, ty, w, h); |
| |
| Color c = styleToUse->backgroundColor(); |
| paintFillLayers(paintInfo, c, styleToUse->backgroundLayers(), my, mh, tx, ty, w, h); |
| |
| // :first-line cannot be used to put borders on a line. Always paint borders with our |
| // non-first-line style. |
| if (parent() && object()->style()->hasBorder()) { |
| StyleImage* borderImage = object()->style()->borderImage().image(); |
| bool hasBorderImage = borderImage && borderImage->canRender(styleToUse->effectiveZoom()); |
| if (hasBorderImage && !borderImage->isLoaded()) |
| return; // Don't paint anything while we wait for the image to load. |
| |
| // The simple case is where we either have no border image or we are the only box for this object. In those |
| // cases only a single call to draw is required. |
| if (!hasBorderImage || (!prevLineBox() && !nextLineBox())) |
| object()->paintBorder(context, tx, ty, w, h, object()->style(), includeLeftEdge(), includeRightEdge()); |
| else { |
| // We have a border image that spans multiple lines. |
| // We need to adjust _tx and _ty by the width of all previous lines. |
| // Think of border image painting on inlines as though you had one long line, a single continuous |
| // strip. Even though that strip has been broken up across multiple lines, you still paint it |
| // as though you had one single line. This means each line has to pick up the image where |
| // the previous line left off. |
| // FIXME: What the heck do we do with RTL here? The math we're using is obviously not right, |
| // but it isn't even clear how this should work at all. |
| int xOffsetOnLine = 0; |
| for (InlineRunBox* curr = prevLineBox(); curr; curr = curr->prevLineBox()) |
| xOffsetOnLine += curr->width(); |
| int startX = tx - xOffsetOnLine; |
| int totalWidth = xOffsetOnLine; |
| for (InlineRunBox* curr = this; curr; curr = curr->nextLineBox()) |
| totalWidth += curr->width(); |
| context->save(); |
| context->clip(IntRect(tx, ty, width(), height())); |
| object()->paintBorder(context, startX, ty, totalWidth, h, object()->style()); |
| context->restore(); |
| } |
| } |
| } |
| } |
| |
| void InlineFlowBox::paintMask(RenderObject::PaintInfo& paintInfo, int tx, int ty) |
| { |
| if (!object()->shouldPaintWithinRoot(paintInfo) || object()->style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask) |
| return; |
| |
| // Move x/y to our coordinates. |
| tx += m_x; |
| ty += m_y; |
| |
| int w = width(); |
| int h = height(); |
| |
| int my = max(ty, paintInfo.rect.y()); |
| int mh; |
| if (ty < paintInfo.rect.y()) |
| mh = max(0, h - (paintInfo.rect.y() - ty)); |
| else |
| mh = min(paintInfo.rect.height(), h); |
| |
| |
| // Figure out if we need to push a transparency layer to render our mask. |
| bool pushTransparencyLayer = false; |
| const NinePieceImage& maskNinePieceImage = object()->style()->maskBoxImage(); |
| StyleImage* maskBoxImage = object()->style()->maskBoxImage().image(); |
| if ((maskBoxImage && object()->style()->maskLayers()->hasImage()) || object()->style()->maskLayers()->next()) |
| pushTransparencyLayer = true; |
| |
| CompositeOperator compositeOp = CompositeDestinationIn; |
| if (pushTransparencyLayer) { |
| paintInfo.context->setCompositeOperation(CompositeDestinationIn); |
| paintInfo.context->beginTransparencyLayer(1.0f); |
| compositeOp = CompositeSourceOver; |
| } |
| |
| paintFillLayers(paintInfo, Color(), object()->style()->maskLayers(), my, mh, tx, ty, w, h, compositeOp); |
| |
| bool hasBoxImage = maskBoxImage && maskBoxImage->canRender(object()->style()->effectiveZoom()); |
| if (!hasBoxImage || !maskBoxImage->isLoaded()) |
| return; // Don't paint anything while we wait for the image to load. |
| |
| // The simple case is where we are the only box for this object. In those |
| // cases only a single call to draw is required. |
| if (!prevLineBox() && !nextLineBox()) { |
| object()->paintNinePieceImage(paintInfo.context, tx, ty, w, h, object()->style(), maskNinePieceImage, compositeOp); |
| } else { |
| // We have a mask image that spans multiple lines. |
| // We need to adjust _tx and _ty by the width of all previous lines. |
| int xOffsetOnLine = 0; |
| for (InlineRunBox* curr = prevLineBox(); curr; curr = curr->prevLineBox()) |
| xOffsetOnLine += curr->width(); |
| int startX = tx - xOffsetOnLine; |
| int totalWidth = xOffsetOnLine; |
| for (InlineRunBox* curr = this; curr; curr = curr->nextLineBox()) |
| totalWidth += curr->width(); |
| paintInfo.context->save(); |
| paintInfo.context->clip(IntRect(tx, ty, width(), height())); |
| object()->paintNinePieceImage(paintInfo.context, startX, ty, totalWidth, h, object()->style(), maskNinePieceImage, compositeOp); |
| paintInfo.context->restore(); |
| } |
| |
| if (pushTransparencyLayer) |
| paintInfo.context->endTransparencyLayer(); |
| } |
| |
| static bool shouldDrawTextDecoration(RenderObject* obj) |
| { |
| for (RenderObject* curr = obj->firstChild(); curr; curr = curr->nextSibling()) { |
| if (curr->isInlineFlow()) |
| return true; |
| if (curr->isText() && !curr->isBR()) { |
| if (!curr->style()->collapseWhiteSpace()) |
| return true; |
| Node* currElement = curr->element(); |
| if (!currElement) |
| return true; |
| if (!currElement->isTextNode()) |
| return true; |
| if (!static_cast<Text*>(currElement)->containsOnlyWhitespace()) |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| void InlineFlowBox::paintTextDecorations(RenderObject::PaintInfo& paintInfo, int tx, int ty, bool paintedChildren) |
| { |
| // Paint text decorations like underlines/overlines. We only do this if we aren't in quirks mode (i.e., in |
| // almost-strict mode or strict mode). |
| if (object()->style()->htmlHacks() || !object()->shouldPaintWithinRoot(paintInfo) || |
| object()->style()->visibility() != VISIBLE) |
| return; |
| |
| // We don't want underlines or other decorations when we're trying to draw nothing but the selection as white text. |
| if (paintInfo.phase == PaintPhaseSelection && paintInfo.forceBlackText) |
| return; |
| |
| GraphicsContext* context = paintInfo.context; |
| tx += m_x; |
| ty += m_y; |
| RenderStyle* styleToUse = object()->style(m_firstLine); |
| int deco = parent() ? styleToUse->textDecoration() : styleToUse->textDecorationsInEffect(); |
| if (deco != TDNONE && |
| ((!paintedChildren && ((deco & UNDERLINE) || (deco & OVERLINE))) || (paintedChildren && (deco & LINE_THROUGH))) && |
| shouldDrawTextDecoration(object())) { |
| int x = m_x + borderLeft() + paddingLeft(); |
| int w = m_width - (borderLeft() + paddingLeft() + borderRight() + paddingRight()); |
| RootInlineBox* rootLine = root(); |
| if (rootLine->ellipsisBox()) { |
| int ellipsisX = rootLine->ellipsisBox()->xPos(); |
| int ellipsisWidth = rootLine->ellipsisBox()->width(); |
| |
| // FIXME: Will need to work with RTL |
| if (rootLine == this) { |
| if (x + w >= ellipsisX + ellipsisWidth) |
| w -= (x + w - ellipsisX - ellipsisWidth); |
| } else { |
| if (x >= ellipsisX) |
| return; |
| if (x + w >= ellipsisX) |
| w -= (x + w - ellipsisX); |
| } |
| } |
| |
| // We must have child boxes and have decorations defined. |
| tx += borderLeft() + paddingLeft(); |
| |
| Color underline, overline, linethrough; |
| underline = overline = linethrough = styleToUse->color(); |
| if (!parent()) |
| object()->getTextDecorationColors(deco, underline, overline, linethrough); |
| |
| bool isPrinting = object()->document()->printing(); |
| context->setStrokeThickness(1.0f); // FIXME: We should improve this rule and not always just assume 1. |
| |
| bool paintUnderline = deco & UNDERLINE && !paintedChildren; |
| bool paintOverline = deco & OVERLINE && !paintedChildren; |
| bool paintLineThrough = deco & LINE_THROUGH && paintedChildren; |
| |
| bool linesAreOpaque = !isPrinting && (!paintUnderline || underline.alpha() == 255) && (!paintOverline || overline.alpha() == 255) && (!paintLineThrough || linethrough.alpha() == 255); |
| |
| bool setClip = false; |
| int extraOffset = 0; |
| ShadowData* shadow = styleToUse->textShadow(); |
| if (!linesAreOpaque && shadow && shadow->next) { |
| IntRect clipRect(tx, ty, w, m_baseline + 2); |
| for (ShadowData* s = shadow; s; s = s->next) { |
| IntRect shadowRect(tx, ty, w, m_baseline + 2); |
| shadowRect.inflate(s->blur); |
| shadowRect.move(s->x, s->y); |
| clipRect.unite(shadowRect); |
| extraOffset = max(extraOffset, max(0, s->y) + s->blur); |
| } |
| context->save(); |
| context->clip(clipRect); |
| extraOffset += m_baseline + 2; |
| ty += extraOffset; |
| setClip = true; |
| } |
| |
| bool setShadow = false; |
| do { |
| if (shadow) { |
| if (!shadow->next) { |
| // The last set of lines paints normally inside the clip. |
| ty -= extraOffset; |
| extraOffset = 0; |
| } |
| context->setShadow(IntSize(shadow->x, shadow->y - extraOffset), shadow->blur, shadow->color); |
| setShadow = true; |
| shadow = shadow->next; |
| } |
| |
| if (paintUnderline) { |
| context->setStrokeColor(underline); |
| // Leave one pixel of white between the baseline and the underline. |
| context->drawLineForText(IntPoint(tx, ty + m_baseline + 1), w, isPrinting); |
| } |
| if (paintOverline) { |
| context->setStrokeColor(overline); |
| context->drawLineForText(IntPoint(tx, ty), w, isPrinting); |
| } |
| if (paintLineThrough) { |
| context->setStrokeColor(linethrough); |
| context->drawLineForText(IntPoint(tx, ty + 2 * m_baseline / 3), w, isPrinting); |
| } |
| } while (shadow); |
| |
| if (setClip) |
| context->restore(); |
| else if (setShadow) |
| context->clearShadow(); |
| } |
| } |
| |
| InlineBox* InlineFlowBox::firstLeafChild() |
| { |
| return firstLeafChildAfterBox(); |
| } |
| |
| InlineBox* InlineFlowBox::lastLeafChild() |
| { |
| return lastLeafChildBeforeBox(); |
| } |
| |
| InlineBox* InlineFlowBox::firstLeafChildAfterBox(InlineBox* start) |
| { |
| InlineBox* leaf = 0; |
| for (InlineBox* box = start ? start->nextOnLine() : firstChild(); box && !leaf; box = box->nextOnLine()) |
| leaf = box->firstLeafChild(); |
| if (start && !leaf && parent()) |
| return parent()->firstLeafChildAfterBox(this); |
| return leaf; |
| } |
| |
| InlineBox* InlineFlowBox::lastLeafChildBeforeBox(InlineBox* start) |
| { |
| InlineBox* leaf = 0; |
| for (InlineBox* box = start ? start->prevOnLine() : lastChild(); box && !leaf; box = box->prevOnLine()) |
| leaf = box->lastLeafChild(); |
| if (start && !leaf && parent()) |
| return parent()->lastLeafChildBeforeBox(this); |
| return leaf; |
| } |
| |
| RenderObject::SelectionState InlineFlowBox::selectionState() |
| { |
| return RenderObject::SelectionNone; |
| } |
| |
| bool InlineFlowBox::canAccommodateEllipsis(bool ltr, int blockEdge, int ellipsisWidth) |
| { |
| for (InlineBox *box = firstChild(); box; box = box->nextOnLine()) { |
| if (!box->canAccommodateEllipsis(ltr, blockEdge, ellipsisWidth)) |
| return false; |
| } |
| return true; |
| } |
| |
| int InlineFlowBox::placeEllipsisBox(bool ltr, int blockEdge, int ellipsisWidth, bool& foundBox) |
| { |
| int result = -1; |
| for (InlineBox *box = firstChild(); box; box = box->nextOnLine()) { |
| int currResult = box->placeEllipsisBox(ltr, blockEdge, ellipsisWidth, foundBox); |
| if (currResult != -1 && result == -1) |
| result = currResult; |
| } |
| return result; |
| } |
| |
| void InlineFlowBox::clearTruncation() |
| { |
| for (InlineBox *box = firstChild(); box; box = box->nextOnLine()) |
| box->clearTruncation(); |
| } |
| |
| #ifndef NDEBUG |
| |
| void InlineFlowBox::checkConsistency() const |
| { |
| #ifdef CHECK_CONSISTENCY |
| ASSERT(!m_hasBadChildList); |
| const InlineBox* prev = 0; |
| for (const InlineBox* child = m_firstChild; child; child = child->nextOnLine()) { |
| ASSERT(child->parent() == this); |
| ASSERT(child->prevOnLine() == prev); |
| prev = child; |
| } |
| ASSERT(prev == m_lastChild); |
| #endif |
| } |
| |
| #endif |
| |
| } // namespace WebCore |
