void RenderLineBoxList::paint(RenderBoxModelObject* renderer, PaintInfo& paintInfo, const LayoutPoint& paintOffset) const
{
// Only paint during the foreground/selection phases.
if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseOutline
&& paintInfo.phase != PaintPhaseSelfOutline && paintInfo.phase != PaintPhaseChildOutlines && paintInfo.phase != PaintPhaseTextClip
&& paintInfo.phase != PaintPhaseMask)
return;
ASSERT(renderer->isRenderBlock() || (renderer->isRenderInline() && renderer->hasLayer())); // The only way an inline could paint like this is if it has a layer.
// If we have no lines then we have no work to do.
if (!firstLineBox())
return;
if (!anyLineIntersectsRect(renderer, paintInfo.rect, paintOffset))
return;
PaintInfo info(paintInfo);
ListHashSet<RenderInline*> outlineObjects;
info.setOutlineObjects(&outlineObjects);
// See if our root lines intersect with the dirty rect. If so, then we paint
// them. Note that boxes can easily overlap, so we can't make any assumptions
// based off positions of our first line box or our last line box.
for (InlineFlowBox* curr = firstLineBox(); curr; curr = curr->nextLineBox()) {
if (lineIntersectsDirtyRect(renderer, curr, info, paintOffset)) {
RootInlineBox& root = curr->root();
curr->paint(info, paintOffset, root.lineTop(), root.lineBottom());
}
}
if (info.phase == PaintPhaseOutline || info.phase == PaintPhaseSelfOutline || info.phase == PaintPhaseChildOutlines) {
ListHashSet<RenderInline*>::iterator end = info.outlineObjects()->end();
for (ListHashSet<RenderInline*>::iterator it = info.outlineObjects()->begin(); it != end; ++it) {
RenderInline* flow = *it;
flow->paintOutline(info, paintOffset);
}
info.outlineObjects()->clear();
}
}
void RenderLineBoxList::paint(RenderBoxModelObject* renderer, PaintInfo& paintInfo, const LayoutPoint& paintOffset) const
{
ASSERT(renderer->isRenderBlock() || (renderer->isRenderInline() && renderer->hasLayer())); // The only way an inline could paint like this is if it has a layer.
// If we have no lines then we have no work to do.
if (!firstLineBox())
return;
// FIXME: Paint-time pagination is obsolete and is now only used by embedded WebViews inside AppKit
// NSViews. Do not add any more code for this.
RenderView& v = renderer->view();
bool usePrintRect = !v.printRect().isEmpty();
if (!anyLineIntersectsRect(renderer, paintInfo.rect, paintOffset, usePrintRect))
return;
PaintInfo info(paintInfo);
ListHashSet<RenderInline*> outlineObjects;
info.outlineObjects = &outlineObjects;
// See if our root lines intersect with the dirty rect. If so, then we paint
// them. Note that boxes can easily overlap, so we can't make any assumptions
// based off positions of our first line box or our last line box.
for (InlineFlowBox* curr = firstLineBox(); curr; curr = curr->nextLineBox()) {
if (usePrintRect) {
// FIXME: This is the deprecated pagination model that is still needed
// for embedded views inside AppKit. AppKit is incapable of paginating vertical
// text pages, so we don't have to deal with vertical lines at all here.
const RootInlineBox& rootBox = curr->root();
LayoutUnit topForPaginationCheck = curr->logicalTopVisualOverflow(rootBox.lineTop());
LayoutUnit bottomForPaginationCheck = curr->logicalLeftVisualOverflow();
if (!curr->parent()) {
// We're a root box. Use lineTop and lineBottom as well here.
topForPaginationCheck = std::min(topForPaginationCheck, rootBox.lineTop());
bottomForPaginationCheck = std::max(bottomForPaginationCheck, rootBox.lineBottom());
}
if (bottomForPaginationCheck - topForPaginationCheck <= v.printRect().height()) {
if (paintOffset.y() + bottomForPaginationCheck > v.printRect().maxY()) {
if (RootInlineBox* nextRootBox = rootBox.nextRootBox())
bottomForPaginationCheck = std::min(bottomForPaginationCheck, std::min<LayoutUnit>(nextRootBox->logicalTopVisualOverflow(), nextRootBox->lineTop()));
}
if (paintOffset.y() + bottomForPaginationCheck > v.printRect().maxY()) {
if (paintOffset.y() + topForPaginationCheck < v.truncatedAt())
v.setBestTruncatedAt(paintOffset.y() + topForPaginationCheck, renderer);
// If we were able to truncate, don't paint.
if (paintOffset.y() + topForPaginationCheck >= v.truncatedAt())
break;
}
}
}
if (lineIntersectsDirtyRect(renderer, curr, info, paintOffset)) {
const RootInlineBox& rootBox = curr->root();
curr->paint(info, paintOffset, rootBox.lineTop(), rootBox.lineBottom());
}
}
if (info.phase == PaintPhaseOutline || info.phase == PaintPhaseSelfOutline || info.phase == PaintPhaseChildOutlines) {
ListHashSet<RenderInline*>::iterator end = info.outlineObjects->end();
for (ListHashSet<RenderInline*>::iterator it = info.outlineObjects->begin(); it != end; ++it) {
RenderInline* flow = *it;
flow->paintOutline(info, paintOffset);
}
info.outlineObjects->clear();
}
}
void RenderLineBoxList::paint(RenderBoxModelObject* renderer, RenderObject::PaintInfo& paintInfo, int tx, int ty) const
{
// Only paint during the foreground/selection phases.(只有画前景和选择才会跑到这里)
if (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseOutline
&& paintInfo.phase != PaintPhaseSelfOutline && paintInfo.phase != PaintPhaseChildOutlines && paintInfo.phase != PaintPhaseTextClip
&& paintInfo.phase != PaintPhaseMask)
return;
ASSERT(renderer->isRenderBlock() || (renderer->isRenderInline() && renderer->hasLayer())); // The only way an inline could paint like this is if it has a layer.
// If we have no lines then we have no work to do.
if (!firstLineBox())
return;
// We can check the first box and last box and avoid painting if we don't
// intersect. This is a quick short-circuit that we can take to avoid walking any lines.
// FIXME: This check is flawed in the following extremely obscure way:
// if some line in the middle has a huge overflow, it might actually extend below the last line.
int yPos = firstLineBox()->topVisibleOverflow() - renderer->maximalOutlineSize(paintInfo.phase);
int h = renderer->maximalOutlineSize(paintInfo.phase) + lastLineBox()->bottomVisibleOverflow() - yPos; // 要画的inline块(从第一行到最后一行的)整个高度
yPos += ty; // 起始高度
if (yPos >= paintInfo.rect.bottom() || yPos + h <= paintInfo.rect.y())
return;
RenderObject::PaintInfo info(paintInfo);
ListHashSet<RenderInline*> outlineObjects;
info.outlineObjects = &outlineObjects;
// See if our root lines intersect with the dirty rect. If so, then we paint
// them. Note that boxes can easily overlap, so we can't make any assumptions
// based off positions of our first line box or our last line box.
RenderView* v = renderer->view();
bool usePrintRect = !v->printRect().isEmpty();
for (InlineFlowBox* curr = firstLineBox(); curr; curr = curr->nextLineBox()) { // 开始对每行进行绘制
if (usePrintRect) {
// FIXME: This is a feeble effort to avoid splitting a line across two pages.
// It is utterly inadequate, and this should not be done at paint time at all.
// The whole way objects break across pages needs to be redone.
// Try to avoid splitting a line vertically, but only if it's less than the height
// of the entire page.
if (curr->bottomVisibleOverflow() - curr->topVisibleOverflow() <= v->printRect().height()) {
if (ty + curr->bottomVisibleOverflow() > v->printRect().bottom()) {
if (ty + curr->topVisibleOverflow() < v->truncatedAt())
v->setBestTruncatedAt(ty + curr->root()->topVisibleOverflow(), renderer);
// If we were able to truncate, don't paint.
if (ty + curr->topVisibleOverflow() >= v->truncatedAt())
break;
}
}
}
int top = min(curr->topVisibleOverflow(), curr->root()->selectionTop()) - renderer->maximalOutlineSize(info.phase); // 高点
int bottom = curr->bottomVisibleOverflow() + renderer->maximalOutlineSize(info.phase); // 底点
h = bottom - top; // 高度
yPos = ty + top; // 开始绘制点
v->setMinimumColumnHeight(h);
if (yPos < info.rect.bottom() && yPos + h > info.rect.y())
curr->paint(info, tx, ty); // 开始绘制该行
}
if (info.phase == PaintPhaseOutline || info.phase == PaintPhaseSelfOutline || info.phase == PaintPhaseChildOutlines) {
ListHashSet<RenderInline*>::iterator end = info.outlineObjects->end();
for (ListHashSet<RenderInline*>::iterator it = info.outlineObjects->begin(); it != end; ++it) {
RenderInline* flow = *it;
flow->paintOutline(info.context, tx, ty);
}
info.outlineObjects->clear();
}
}
