Source/core/rendering/RenderText.cpp - Issue 940373003: Rename RenderText to LayoutText

Unified Diff: Source/core/rendering/RenderText.cpp

Issue 940373003: Rename RenderText to LayoutText (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: Created 5 years, 10 months ago

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Index: Source/core/rendering/RenderText.cpp

diff --git a/Source/core/rendering/RenderText.cpp b/Source/core/rendering/RenderText.cpp

deleted file mode 100644

index a959e3983fd81a5979aa4c051ee7298880a1d736..0000000000000000000000000000000000000000

--- a/Source/core/rendering/RenderText.cpp

+++ /dev/null

@@ -1,1899 +0,0 @@

-/*

- *

- * 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 "core/rendering/RenderText.h"

-#include "core/dom/AXObjectCache.h"

-#include "core/dom/Text.h"

-#include "core/editing/VisiblePosition.h"

-#include "core/editing/iterators/TextIterator.h"

-#include "core/frame/FrameView.h"

-#include "core/frame/Settings.h"

-#include "core/html/parser/TextResourceDecoder.h"

-#include "core/layout/Layer.h"

-#include "core/layout/LayoutBlock.h"

-#include "core/layout/LayoutView.h"

-#include "core/layout/TextRunConstructor.h"

-#include "core/layout/line/AbstractInlineTextBox.h"

-#include "core/layout/line/EllipsisBox.h"

-#include "core/layout/line/InlineTextBox.h"

-#include "core/rendering/RenderCombineText.h"

-#include "platform/fonts/Character.h"

-#include "platform/fonts/FontCache.h"

-#include "platform/geometry/FloatQuad.h"

-#include "platform/graphics/paint/DisplayItemList.h"

-#include "platform/text/BidiResolver.h"

-#include "platform/text/TextBreakIterator.h"

-#include "platform/text/TextRunIterator.h"

-#include "wtf/text/StringBuffer.h"

-#include "wtf/text/StringBuilder.h"

-#include "wtf/unicode/CharacterNames.h"

-using namespace WTF;

-using namespace Unicode;

-namespace blink {

-struct SameSizeAsRenderText : public LayoutObject {

- uint32_t bitfields : 16;

- float widths[4];

- String text;

- void* pointers[2];

-};

-static_assert(sizeof(RenderText) == sizeof(SameSizeAsRenderText), "RenderText should stay small");

-class SecureTextTimer;

-typedef HashMap<RenderText*, SecureTextTimer*> SecureTextTimerMap;

-static SecureTextTimerMap* gSecureTextTimers = 0;

-class SecureTextTimer final : public TimerBase {

-public:

- SecureTextTimer(RenderText* renderText)

- : m_renderText(renderText)

- , m_lastTypedCharacterOffset(-1)

- {

- }

- void restartWithNewText(unsigned lastTypedCharacterOffset)

- {

- m_lastTypedCharacterOffset = lastTypedCharacterOffset;

- if (Settings* settings = m_renderText->document().settings())

- startOneShot(settings->passwordEchoDurationInSeconds(), FROM_HERE);

- }

- void invalidate() { m_lastTypedCharacterOffset = -1; }

- unsigned lastTypedCharacterOffset() { return m_lastTypedCharacterOffset; }

-private:

- virtual void fired() override

- {

- ASSERT(gSecureTextTimers->contains(m_renderText));

- m_renderText->setText(m_renderText->text().impl(), true /* forcing setting text as it may be masked later */);

- }

- RenderText* m_renderText;

- int m_lastTypedCharacterOffset;

-};

-static void makeCapitalized(String* string, UChar previous)

- if (string->isNull())

- return;

- unsigned length = string->length();

- const StringImpl& input = *string->impl();

- if (length >= std::numeric_limits<unsigned>::max())

- CRASH();

- StringBuffer<UChar> stringWithPrevious(length + 1);

- stringWithPrevious[0] = previous == noBreakSpace ? space : previous;

- for (unsigned i = 1; i < length + 1; i++) {

- // Replace &nbsp with a real space since ICU no longer treats &nbsp as a word separator.

- if (input[i - 1] == noBreakSpace)

- stringWithPrevious[i] = space;

- else

- stringWithPrevious[i] = input[i - 1];

- }

- TextBreakIterator* boundary = wordBreakIterator(stringWithPrevious.characters(), length + 1);

- if (!boundary)

- return;

- StringBuilder result;

- result.reserveCapacity(length);

- int32_t endOfWord;

- int32_t startOfWord = boundary->first();

- for (endOfWord = boundary->next(); endOfWord != TextBreakDone; startOfWord = endOfWord, endOfWord = boundary->next()) {

- if (startOfWord) // Ignore first char of previous string

- result.append(input[startOfWord - 1] == noBreakSpace ? noBreakSpace : toTitleCase(stringWithPrevious[startOfWord]));

- for (int i = startOfWord + 1; i < endOfWord; i++)

- result.append(input[i - 1]);

- }

- *string = result.toString();

-RenderText::RenderText(Node* node, PassRefPtr<StringImpl> str)

- : LayoutObject(!node || node->isDocumentNode() ? 0 : node)

- , m_hasTab(false)

- , m_linesDirty(false)

- , m_containsReversedText(false)

- , m_knownToHaveNoOverflowAndNoFallbackFonts(false)

- , m_minWidth(-1)

- , m_maxWidth(-1)

- , m_firstLineMinWidth(0)

- , m_lastLineLineMinWidth(0)

- , m_text(str)

- , m_firstTextBox(0)

- , m_lastTextBox(0)

- ASSERT(m_text);

- // FIXME: Some clients of RenderText (and subclasses) pass Document as node to create anonymous renderer.

- // They should be switched to passing null and using setDocumentForAnonymous.

- if (node && node->isDocumentNode())

- setDocumentForAnonymous(toDocument(node));

- m_isAllASCII = m_text.containsOnlyASCII();

- m_canUseSimpleFontCodePath = computeCanUseSimpleFontCodePath();

- setIsText();

- view()->frameView()->incrementVisuallyNonEmptyCharacterCount(m_text.length());

-#if ENABLE(ASSERT)

-RenderText::~RenderText()

- ASSERT(!m_firstTextBox);

- ASSERT(!m_lastTextBox);

-#endif

-const char* RenderText::renderName() const

- return "RenderText";

-bool RenderText::isTextFragment() const

- return false;

-bool RenderText::isWordBreak() const

- return false;

-void RenderText::styleDidChange(StyleDifference diff, const LayoutStyle* oldStyle)

- // There is no need to ever schedule paint invalidations from a style change of a text run, since

- // we already did this for the parent of the text run.

- // We do have to schedule layouts, though, since a style change can force us to

- // need to relayout.

- if (diff.needsFullLayout()) {

- setNeedsLayoutAndPrefWidthsRecalc();

- m_knownToHaveNoOverflowAndNoFallbackFonts = false;

- }

- const LayoutStyle& newStyle = styleRef();

- ETextTransform oldTransform = oldStyle ? oldStyle->textTransform() : TTNONE;

- ETextSecurity oldSecurity = oldStyle ? oldStyle->textSecurity() : TSNONE;

- if (oldTransform != newStyle.textTransform() || oldSecurity != newStyle.textSecurity())

- transformText();

- // This is an optimization that kicks off font load before layout.

- // In order to make it fast, we only check if the first character of the

- // text is included in the unicode ranges of the fonts.

- if (!text().containsOnlyWhitespace())

- newStyle.font().willUseFontData(text().characterStartingAt(0));

-void RenderText::removeAndDestroyTextBoxes()

- if (!documentBeingDestroyed()) {

- if (firstTextBox()) {

- if (isBR()) {

- RootInlineBox* next = firstTextBox()->root().nextRootBox();

- if (next)

- next->markDirty();

- }

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())

- box->remove();

- } else if (parent())

- parent()->dirtyLinesFromChangedChild(this);

- }

- deleteTextBoxes();

-void RenderText::willBeDestroyed()

- if (SecureTextTimer* secureTextTimer = gSecureTextTimers ? gSecureTextTimers->take(this) : 0)

- delete secureTextTimer;

- removeAndDestroyTextBoxes();

- LayoutObject::willBeDestroyed();

-void RenderText::extractTextBox(InlineTextBox* box)

- checkConsistency();

- m_lastTextBox = box->prevTextBox();

- if (box == m_firstTextBox)

- m_firstTextBox = 0;

- if (box->prevTextBox())

- box->prevTextBox()->setNextTextBox(0);

- box->setPreviousTextBox(0);

- for (InlineTextBox* curr = box; curr; curr = curr->nextTextBox())

- curr->setExtracted();

- checkConsistency();

-void RenderText::attachTextBox(InlineTextBox* box)

- checkConsistency();

- if (m_lastTextBox) {

- m_lastTextBox->setNextTextBox(box);

- box->setPreviousTextBox(m_lastTextBox);

- } else

- m_firstTextBox = box;

- InlineTextBox* last = box;

- for (InlineTextBox* curr = box; curr; curr = curr->nextTextBox()) {

- curr->setExtracted(false);

- last = curr;

- }

- m_lastTextBox = last;

- checkConsistency();

-void RenderText::removeTextBox(InlineTextBox* box)

- checkConsistency();

- if (box == m_firstTextBox)

- m_firstTextBox = box->nextTextBox();

- if (box == m_lastTextBox)

- m_lastTextBox = box->prevTextBox();

- if (box->nextTextBox())

- box->nextTextBox()->setPreviousTextBox(box->prevTextBox());

- if (box->prevTextBox())

- box->prevTextBox()->setNextTextBox(box->nextTextBox());

- checkConsistency();

-void RenderText::deleteTextBoxes()

- if (firstTextBox()) {

- InlineTextBox* next;

- for (InlineTextBox* curr = firstTextBox(); curr; curr = next) {

- next = curr->nextTextBox();

- curr->destroy();

- }

- m_firstTextBox = m_lastTextBox = 0;

- }

-PassRefPtr<StringImpl> RenderText::originalText() const

- Node* e = node();

- return (e && e->isTextNode()) ? toText(e)->dataImpl() : 0;

-String RenderText::plainText() const

- if (node())

- return blink::plainText(rangeOfContents(node()).get());

- // FIXME: this is just a stopgap until TextIterator is adapted to support generated text.

- StringBuilder plainTextBuilder;

- for (InlineTextBox* textBox = firstTextBox(); textBox; textBox = textBox->nextTextBox()) {

- String text = m_text.substring(textBox->start(), textBox->len()).simplifyWhiteSpace(WTF::DoNotStripWhiteSpace);

- plainTextBuilder.append(text);

- if (textBox->nextTextBox() && textBox->nextTextBox()->start() > textBox->end() && text.length() && !text.right(1).containsOnlyWhitespace())

- plainTextBuilder.append(space);

- }

- return plainTextBuilder.toString();

-void RenderText::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())

- rects.append(enclosingIntRect(FloatRect(FloatPoint(accumulatedOffset) + box->topLeft().toFloatPoint(), box->size().toFloatSize())));

-static FloatRect localQuadForTextBox(InlineTextBox* box, unsigned start, unsigned end, bool useSelectionHeight)

- unsigned realEnd = std::min(box->end() + 1, end);

- LayoutRect r = box->localSelectionRect(start, realEnd);

- if (r.height()) {

- if (!useSelectionHeight) {

- // Change the height and y position (or width and x for vertical text)

- // because selectionRect uses selection-specific values.

- if (box->isHorizontal()) {

- r.setHeight(box->height());

- r.setY(box->y());

- } else {

- r.setWidth(box->width());

- r.setX(box->x());

- }

- return FloatRect(r);

- }

- return FloatRect();

-void RenderText::absoluteRectsForRange(Vector<IntRect>& rects, unsigned start, unsigned end, bool useSelectionHeight, bool* wasFixed)

- // Work around signed/unsigned issues. This function takes unsigneds, and is often passed UINT_MAX

- // to mean "all the way to the end". InlineTextBox coordinates are unsigneds, so changing this

- // function to take ints causes various internal mismatches. But selectionRect takes ints, and

- // passing UINT_MAX to it causes trouble. Ideally we'd change selectionRect to take unsigneds, but

- // that would cause many ripple effects, so for now we'll just clamp our unsigned parameters to INT_MAX.

- ASSERT(end == UINT_MAX || end <= INT_MAX);

- ASSERT(start <= INT_MAX);

- start = std::min(start, static_cast<unsigned>(INT_MAX));

- end = std::min(end, static_cast<unsigned>(INT_MAX));

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {

- // Note: box->end() returns the index of the last character, not the index past it

- if (start <= box->start() && box->end() < end) {

- FloatRect r = box->calculateBoundaries().toFloatRect();

- if (useSelectionHeight) {

- LayoutRect selectionRect = box->localSelectionRect(start, end);

- if (box->isHorizontal()) {

- r.setHeight(selectionRect.height().toFloat());

- r.setY(selectionRect.y().toFloat());

- } else {

- r.setWidth(selectionRect.width().toFloat());

- r.setX(selectionRect.x().toFloat());

- }

- rects.append(localToAbsoluteQuad(r, 0, wasFixed).enclosingBoundingBox());

- } else {

- // FIXME: This code is wrong. It's converting local to absolute twice. http://webkit.org/b/65722

- FloatRect rect = localQuadForTextBox(box, start, end, useSelectionHeight);

- if (!rect.isZero())

- rects.append(localToAbsoluteQuad(rect, 0, wasFixed).enclosingBoundingBox());

- }

-static IntRect ellipsisRectForBox(InlineTextBox* box, unsigned startPos, unsigned endPos)

- if (!box)

- return IntRect();

- unsigned short truncation = box->truncation();

- if (truncation == cNoTruncation)

- return IntRect();

- IntRect rect;

- if (EllipsisBox* ellipsis = box->root().ellipsisBox()) {

- int ellipsisStartPosition = std::max<int>(startPos - box->start(), 0);

- int ellipsisEndPosition = std::min<int>(endPos - box->start(), box->len());

- // The ellipsis should be considered to be selected if the end of

- // the selection is past the beginning of the truncation and the

- // beginning of the selection is before or at the beginning of the truncation.

- if (ellipsisEndPosition >= truncation && ellipsisStartPosition <= truncation)

- return ellipsis->selectionRect();

- }

- return IntRect();

-void RenderText::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed, ClippingOption option) const

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {

- FloatRect boundaries = box->calculateBoundaries().toFloatRect();

- // Shorten the width of this text box if it ends in an ellipsis.

- // FIXME: ellipsisRectForBox should switch to return FloatRect soon with the subpixellayout branch.

- IntRect ellipsisRect = (option == ClipToEllipsis) ? ellipsisRectForBox(box, 0, textLength()) : IntRect();

- if (!ellipsisRect.isEmpty()) {

- if (style()->isHorizontalWritingMode())

- boundaries.setWidth(ellipsisRect.maxX() - boundaries.x());

- else

- boundaries.setHeight(ellipsisRect.maxY() - boundaries.y());

- }

- quads.append(localToAbsoluteQuad(boundaries, 0, wasFixed));

- }

-void RenderText::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const

- absoluteQuads(quads, wasFixed, NoClipping);

-void RenderText::absoluteQuadsForRange(Vector<FloatQuad>& quads, unsigned start, unsigned end, bool useSelectionHeight, bool* wasFixed)

- // Work around signed/unsigned issues. This function takes unsigneds, and is often passed UINT_MAX

- // to mean "all the way to the end". InlineTextBox coordinates are unsigneds, so changing this

- // function to take ints causes various internal mismatches. But selectionRect takes ints, and

- // passing UINT_MAX to it causes trouble. Ideally we'd change selectionRect to take unsigneds, but

- // that would cause many ripple effects, so for now we'll just clamp our unsigned parameters to INT_MAX.

- ASSERT(end == UINT_MAX || end <= INT_MAX);

- ASSERT(start <= INT_MAX);

- start = std::min(start, static_cast<unsigned>(INT_MAX));

- end = std::min(end, static_cast<unsigned>(INT_MAX));

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {

- // Note: box->end() returns the index of the last character, not the index past it

- if (start <= box->start() && box->end() < end) {

- FloatRect r = box->calculateBoundaries().toFloatRect();

- if (useSelectionHeight) {

- LayoutRect selectionRect = box->localSelectionRect(start, end);

- if (box->isHorizontal()) {

- r.setHeight(selectionRect.height().toFloat());

- r.setY(selectionRect.y().toFloat());

- } else {

- r.setWidth(selectionRect.width().toFloat());

- r.setX(selectionRect.x().toFloat());

- }

- quads.append(localToAbsoluteQuad(r, 0, wasFixed));

- } else {

- FloatRect rect = localQuadForTextBox(box, start, end, useSelectionHeight);

- if (!rect.isZero())

- quads.append(localToAbsoluteQuad(rect, 0, wasFixed));

- }

-enum ShouldAffinityBeDownstream { AlwaysDownstream, AlwaysUpstream, UpstreamIfPositionIsNotAtStart };

-static bool lineDirectionPointFitsInBox(int pointLineDirection, InlineTextBox* box, ShouldAffinityBeDownstream& shouldAffinityBeDownstream)

- shouldAffinityBeDownstream = AlwaysDownstream;

- // the x coordinate is equal to the left edge of this box

- // the affinity must be downstream so the position doesn't jump back to the previous line

- // except when box is the first box in the line

- if (pointLineDirection <= box->logicalLeft()) {

- shouldAffinityBeDownstream = !box->prevLeafChild() ? UpstreamIfPositionIsNotAtStart : AlwaysDownstream;

- return true;

- }

- // and the x coordinate is to the left of the right edge of this box

- // check to see if position goes in this box

- if (pointLineDirection < box->logicalRight()) {

- shouldAffinityBeDownstream = UpstreamIfPositionIsNotAtStart;

- return true;

- }

- // box is first on line

- // and the x coordinate is to the left of the first text box left edge

- if (!box->prevLeafChildIgnoringLineBreak() && pointLineDirection < box->logicalLeft())

- return true;

- if (!box->nextLeafChildIgnoringLineBreak()) {

- // box is last on line

- // and the x coordinate is to the right of the last text box right edge

- // generate VisiblePosition, use UPSTREAM affinity if possible

- shouldAffinityBeDownstream = UpstreamIfPositionIsNotAtStart;

- return true;

- }

- return false;

-static PositionWithAffinity createPositionWithAffinityForBox(const InlineBox* box, int offset, ShouldAffinityBeDownstream shouldAffinityBeDownstream)

- EAffinity affinity = VP_DEFAULT_AFFINITY;

- switch (shouldAffinityBeDownstream) {

- case AlwaysDownstream:

- affinity = DOWNSTREAM;

- break;

- case AlwaysUpstream:

- affinity = VP_UPSTREAM_IF_POSSIBLE;

- break;

- case UpstreamIfPositionIsNotAtStart:

- affinity = offset > box->caretMinOffset() ? VP_UPSTREAM_IF_POSSIBLE : DOWNSTREAM;

- break;

- }

- int textStartOffset = box->renderer().isText() ? toRenderText(box->renderer()).textStartOffset() : 0;

- return box->renderer().createPositionWithAffinity(offset + textStartOffset, affinity);

-static PositionWithAffinity createPositionWithAffinityForBoxAfterAdjustingOffsetForBiDi(const InlineTextBox* box, int offset, ShouldAffinityBeDownstream shouldAffinityBeDownstream)

- ASSERT(box);

- ASSERT(offset >= 0);

- if (offset && static_cast<unsigned>(offset) < box->len())

- return createPositionWithAffinityForBox(box, box->start() + offset, shouldAffinityBeDownstream);

- bool positionIsAtStartOfBox = !offset;

- if (positionIsAtStartOfBox == box->isLeftToRightDirection()) {

- // offset is on the left edge

- const InlineBox* prevBox = box->prevLeafChildIgnoringLineBreak();

- if ((prevBox && prevBox->bidiLevel() == box->bidiLevel())

- || box->renderer().containingBlock()->style()->direction() == box->direction()) // FIXME: left on 12CBA

- return createPositionWithAffinityForBox(box, box->caretLeftmostOffset(), shouldAffinityBeDownstream);

- if (prevBox && prevBox->bidiLevel() > box->bidiLevel()) {

- // e.g. left of B in aDC12BAb

- const InlineBox* leftmostBox;

- do {

- leftmostBox = prevBox;

- prevBox = leftmostBox->prevLeafChildIgnoringLineBreak();

- } while (prevBox && prevBox->bidiLevel() > box->bidiLevel());

- return createPositionWithAffinityForBox(leftmostBox, leftmostBox->caretRightmostOffset(), shouldAffinityBeDownstream);

- }

- if (!prevBox || prevBox->bidiLevel() < box->bidiLevel()) {

- // e.g. left of D in aDC12BAb

- const InlineBox* rightmostBox;

- const InlineBox* nextBox = box;

- do {

- rightmostBox = nextBox;

- nextBox = rightmostBox->nextLeafChildIgnoringLineBreak();

- } while (nextBox && nextBox->bidiLevel() >= box->bidiLevel());

- return createPositionWithAffinityForBox(rightmostBox,

- box->isLeftToRightDirection() ? rightmostBox->caretMaxOffset() : rightmostBox->caretMinOffset(), shouldAffinityBeDownstream);

- }

- return createPositionWithAffinityForBox(box, box->caretRightmostOffset(), shouldAffinityBeDownstream);

- }

- const InlineBox* nextBox = box->nextLeafChildIgnoringLineBreak();

- if ((nextBox && nextBox->bidiLevel() == box->bidiLevel())

- || box->renderer().containingBlock()->style()->direction() == box->direction())

- return createPositionWithAffinityForBox(box, box->caretRightmostOffset(), shouldAffinityBeDownstream);

- // offset is on the right edge

- if (nextBox && nextBox->bidiLevel() > box->bidiLevel()) {

- // e.g. right of C in aDC12BAb

- const InlineBox* rightmostBox;

- do {

- rightmostBox = nextBox;

- nextBox = rightmostBox->nextLeafChildIgnoringLineBreak();

- } while (nextBox && nextBox->bidiLevel() > box->bidiLevel());

- return createPositionWithAffinityForBox(rightmostBox, rightmostBox->caretLeftmostOffset(), shouldAffinityBeDownstream);

- }

- if (!nextBox || nextBox->bidiLevel() < box->bidiLevel()) {

- // e.g. right of A in aDC12BAb

- const InlineBox* leftmostBox;

- const InlineBox* prevBox = box;

- do {

- leftmostBox = prevBox;

- prevBox = leftmostBox->prevLeafChildIgnoringLineBreak();

- } while (prevBox && prevBox->bidiLevel() >= box->bidiLevel());

- return createPositionWithAffinityForBox(leftmostBox,

- box->isLeftToRightDirection() ? leftmostBox->caretMinOffset() : leftmostBox->caretMaxOffset(), shouldAffinityBeDownstream);

- }

- return createPositionWithAffinityForBox(box, box->caretLeftmostOffset(), shouldAffinityBeDownstream);

-PositionWithAffinity RenderText::positionForPoint(const LayoutPoint& point)

- if (!firstTextBox() || textLength() == 0)

- return createPositionWithAffinity(0, DOWNSTREAM);

- LayoutUnit pointLineDirection = firstTextBox()->isHorizontal() ? point.x() : point.y();

- LayoutUnit pointBlockDirection = firstTextBox()->isHorizontal() ? point.y() : point.x();

- bool blocksAreFlipped = style()->isFlippedBlocksWritingMode();

- InlineTextBox* lastBox = 0;

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {

- if (box->isLineBreak() && !box->prevLeafChild() && box->nextLeafChild() && !box->nextLeafChild()->isLineBreak())

- box = box->nextTextBox();

- RootInlineBox& rootBox = box->root();

- LayoutUnit top = std::min(rootBox.selectionTop(), rootBox.lineTop());

- if (pointBlockDirection > top || (!blocksAreFlipped && pointBlockDirection == top)) {

- LayoutUnit bottom = rootBox.selectionBottom();

- if (rootBox.nextRootBox())

- bottom = std::min(bottom, rootBox.nextRootBox()->lineTop());

- if (pointBlockDirection < bottom || (blocksAreFlipped && pointBlockDirection == bottom)) {

- ShouldAffinityBeDownstream shouldAffinityBeDownstream;

- if (lineDirectionPointFitsInBox(pointLineDirection, box, shouldAffinityBeDownstream))

- return createPositionWithAffinityForBoxAfterAdjustingOffsetForBiDi(box, box->offsetForPosition(pointLineDirection.toFloat()), shouldAffinityBeDownstream);

- }

- lastBox = box;

- }

- if (lastBox) {

- ShouldAffinityBeDownstream shouldAffinityBeDownstream;

- lineDirectionPointFitsInBox(pointLineDirection, lastBox, shouldAffinityBeDownstream);

- return createPositionWithAffinityForBoxAfterAdjustingOffsetForBiDi(lastBox, lastBox->offsetForPosition(pointLineDirection.toFloat()) + lastBox->start(), shouldAffinityBeDownstream);

- }

- return createPositionWithAffinity(0, DOWNSTREAM);

-LayoutRect RenderText::localCaretRect(InlineBox* inlineBox, int caretOffset, LayoutUnit* extraWidthToEndOfLine)

- if (!inlineBox)

- return LayoutRect();

- ASSERT(inlineBox->isInlineTextBox());

- if (!inlineBox->isInlineTextBox())

- return LayoutRect();

- InlineTextBox* box = toInlineTextBox(inlineBox);

- int height = box->root().selectionHeight();

- int top = box->root().selectionTop();

- // Go ahead and round left to snap it to the nearest pixel.

- float left = box->positionForOffset(caretOffset);

- // Distribute the caret's width to either side of the offset.

- int caretWidthLeftOfOffset = caretWidth / 2;

- left -= caretWidthLeftOfOffset;

- int caretWidthRightOfOffset = caretWidth - caretWidthLeftOfOffset;

- left = roundf(left);

- float rootLeft = box->root().logicalLeft();

- float rootRight = box->root().logicalRight();

- // FIXME: should we use the width of the root inline box or the

- // width of the containing block for this?

- if (extraWidthToEndOfLine)

- *extraWidthToEndOfLine = (box->root().logicalWidth() + rootLeft) - (left + 1);

- LayoutBlock* cb = containingBlock();

- const LayoutStyle& cbStyle = cb->styleRef();

- float leftEdge;

- float rightEdge;

- leftEdge = std::min<float>(0, rootLeft);

- rightEdge = std::max<float>(cb->logicalWidth().toFloat(), rootRight);

- bool rightAligned = false;

- switch (cbStyle.textAlign()) {

- case RIGHT:

- case WEBKIT_RIGHT:

- rightAligned = true;

- break;

- case LEFT:

- case WEBKIT_LEFT:

- case CENTER:

- case WEBKIT_CENTER:

- break;

- case JUSTIFY:

- case TASTART:

- rightAligned = !cbStyle.isLeftToRightDirection();

- break;

- case TAEND:

- rightAligned = cbStyle.isLeftToRightDirection();

- break;

- }

- // for dir=auto, use inlineBoxBidiLevel() to test the correct direction for the cursor.

- if (rightAligned && (node() && node()->selfOrAncestorHasDirAutoAttribute())) {

- if (inlineBox->bidiLevel()%2 != 1)

- rightAligned = false;

- }

- if (rightAligned) {

- left = std::max(left, leftEdge);

- left = std::min(left, rootRight - caretWidth);

- } else {

- left = std::min(left, rightEdge - caretWidthRightOfOffset);

- left = std::max(left, rootLeft);

- }

- return LayoutRect(style()->isHorizontalWritingMode() ? IntRect(left, top, caretWidth, height) : IntRect(top, left, height, caretWidth));

-ALWAYS_INLINE float RenderText::widthFromCache(const Font& f, int start, int len, float xPos, TextDirection textDirection, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow* glyphOverflow) const

- if (style()->hasTextCombine() && isCombineText()) {

- const RenderCombineText* combineText = toRenderCombineText(this);

- if (combineText->isCombined())

- return combineText->combinedTextWidth(f);

- }

- if (f.isFixedPitch() && f.fontDescription().variant() == FontVariantNormal && m_isAllASCII && (!glyphOverflow || !glyphOverflow->computeBounds)) {

- bool missingGlyph = false;

- float monospaceCharacterWidth = f.spaceWidth();

- float w = 0;

- bool isSpace;

- ASSERT(m_text);

- StringImpl& text = *m_text.impl();

- const LayoutStyle& layoutStyle = styleRef();

- for (int i = start; i < start + len; i++) {

- char c = text[i];

- // If glyph is not present in primary font then we cannot calculate width based on primary

- // font property, we need to call "width" method of Font Object.

- if (!f.primaryFontHasGlyphForCharacter(text[i])) {

- missingGlyph = true;

- break;

- }

- if (c <= space) {

- if (c == space || c == newlineCharacter) {

- w += monospaceCharacterWidth;

- isSpace = true;

- } else if (c == characterTabulation) {

- if (layoutStyle.collapseWhiteSpace()) {

- w += monospaceCharacterWidth;

- isSpace = true;

- } else {

- w += f.tabWidth(layoutStyle.tabSize(), xPos + w);

- isSpace = false;

- }

- } else

- isSpace = false;

- } else {

- w += monospaceCharacterWidth;

- isSpace = false;

- }

- if (isSpace && i > start)

- w += f.fontDescription().wordSpacing();

- }

- if (!missingGlyph)

- return w;

- }

- TextRun run = constructTextRun(const_cast<RenderText*>(this), f, this, start, len, styleRef(), textDirection);

- run.setCharactersLength(textLength() - start);

- ASSERT(run.charactersLength() >= run.length());

- run.setCodePath(canUseSimpleFontCodePath() ? TextRun::ForceSimple : TextRun::ForceComplex);

- run.setTabSize(!style()->collapseWhiteSpace(), style()->tabSize());

- run.setXPos(xPos);

- return f.width(run, fallbackFonts, glyphOverflow);

-void RenderText::trimmedPrefWidths(FloatWillBeLayoutUnit leadWidth,

- FloatWillBeLayoutUnit& firstLineMinWidth, bool& hasBreakableStart,

- FloatWillBeLayoutUnit& lastLineMinWidth, bool& hasBreakableEnd,

- bool& hasBreakableChar, bool& hasBreak,

- FloatWillBeLayoutUnit& firstLineMaxWidth, FloatWillBeLayoutUnit& lastLineMaxWidth,

- FloatWillBeLayoutUnit& minWidth, FloatWillBeLayoutUnit& maxWidth, bool& stripFrontSpaces,

- TextDirection direction)

- bool collapseWhiteSpace = style()->collapseWhiteSpace();

- if (!collapseWhiteSpace)

- stripFrontSpaces = false;

- if (m_hasTab || preferredLogicalWidthsDirty())

- computePreferredLogicalWidths(leadWidth);

- hasBreakableStart = !stripFrontSpaces && m_hasBreakableStart;

- hasBreakableEnd = m_hasBreakableEnd;

- int len = textLength();

- if (!len || (stripFrontSpaces && text().impl()->containsOnlyWhitespace())) {

- firstLineMinWidth = FloatWillBeLayoutUnit();

- lastLineMinWidth = FloatWillBeLayoutUnit();

- firstLineMaxWidth = FloatWillBeLayoutUnit();

- lastLineMaxWidth = FloatWillBeLayoutUnit();

- minWidth = FloatWillBeLayoutUnit();

- maxWidth = FloatWillBeLayoutUnit();

- hasBreak = false;

- return;

- }

- minWidth = m_minWidth;

- maxWidth = m_maxWidth;

- firstLineMinWidth = m_firstLineMinWidth;

- lastLineMinWidth = m_lastLineLineMinWidth;

- hasBreakableChar = m_hasBreakableChar;

- hasBreak = m_hasBreak;

- ASSERT(m_text);

- StringImpl& text = *m_text.impl();

- if (text[0] == space || (text[0] == newlineCharacter && !style()->preserveNewline()) || text[0] == characterTabulation) {

- const Font& font = style()->font(); // FIXME: This ignores first-line.

- if (stripFrontSpaces) {

- const UChar spaceChar = space;

- TextRun run = constructTextRun(this, font, &spaceChar, 1, styleRef(), direction);

- run.setCodePath(canUseSimpleFontCodePath() ? TextRun::ForceSimple : TextRun::ForceComplex);

- float spaceWidth = font.width(run);

- maxWidth -= spaceWidth;

- } else {

- maxWidth += font.fontDescription().wordSpacing();

- }

- stripFrontSpaces = collapseWhiteSpace && m_hasEndWhiteSpace;

- if (!style()->autoWrap() || minWidth > maxWidth)

- minWidth = maxWidth;

- // Compute our max widths by scanning the string for newlines.

- if (hasBreak) {

- const Font& f = style()->font(); // FIXME: This ignores first-line.

- bool firstLine = true;

- firstLineMaxWidth = maxWidth;

- lastLineMaxWidth = maxWidth;

- for (int i = 0; i < len; i++) {

- int linelen = 0;

- while (i + linelen < len && text[i + linelen] != newlineCharacter)

- linelen++;

- if (linelen) {

- lastLineMaxWidth = widthFromCache(f, i, linelen, leadWidth + lastLineMaxWidth, direction, 0, 0);

- if (firstLine) {

- firstLine = false;

- leadWidth = FloatWillBeLayoutUnit();

- firstLineMaxWidth = lastLineMaxWidth;

- }

- i += linelen;

- } else if (firstLine) {

- firstLineMaxWidth = FloatWillBeLayoutUnit();

- firstLine = false;

- leadWidth = FloatWillBeLayoutUnit();

- }

- if (i == len - 1) {

- // A <pre> run that ends with a newline, as in, e.g.,

- // <pre>Some text\n\n<span>More text</pre>

- lastLineMaxWidth = FloatWillBeLayoutUnit();

- }

-float RenderText::minLogicalWidth() const

- if (preferredLogicalWidthsDirty())

- const_cast<RenderText*>(this)->computePreferredLogicalWidths(0);

- return m_minWidth;

-float RenderText::maxLogicalWidth() const

- if (preferredLogicalWidthsDirty())

- const_cast<RenderText*>(this)->computePreferredLogicalWidths(0);

- return m_maxWidth;

-void RenderText::computePreferredLogicalWidths(float leadWidth)

- HashSet<const SimpleFontData*> fallbackFonts;

- GlyphOverflow glyphOverflow;

- computePreferredLogicalWidths(leadWidth, fallbackFonts, glyphOverflow);

- // We shouldn't change our mind once we "know".

- ASSERT(!m_knownToHaveNoOverflowAndNoFallbackFonts || (fallbackFonts.isEmpty() && glyphOverflow.isZero()));

- m_knownToHaveNoOverflowAndNoFallbackFonts = fallbackFonts.isEmpty() && glyphOverflow.isZero();

-static inline float hyphenWidth(RenderText* renderer, const Font& font, TextDirection direction)

- const LayoutStyle& style = renderer->styleRef();

- return font.width(constructTextRun(renderer, font, style.hyphenString().string(), style, direction));

-void RenderText::computePreferredLogicalWidths(float leadWidth, HashSet<const SimpleFontData*>& fallbackFonts, GlyphOverflow& glyphOverflow)

- ASSERT(m_hasTab || preferredLogicalWidthsDirty() || !m_knownToHaveNoOverflowAndNoFallbackFonts);

- m_minWidth = 0;

- m_maxWidth = 0;

- m_firstLineMinWidth = 0;

- m_lastLineLineMinWidth = 0;

- if (isBR())

- return;

- float currMinWidth = 0;

- float currMaxWidth = 0;

- m_hasBreakableChar = false;

- m_hasBreak = false;

- m_hasTab = false;

- m_hasBreakableStart = false;

- m_hasBreakableEnd = false;

- m_hasEndWhiteSpace = false;

- const LayoutStyle& styleToUse = styleRef();

- const Font& f = styleToUse.font(); // FIXME: This ignores first-line.

- float wordSpacing = styleToUse.wordSpacing();

- int len = textLength();

- LazyLineBreakIterator breakIterator(m_text, styleToUse.locale());

- bool needsWordSpacing = false;

- bool ignoringSpaces = false;

- bool isSpace = false;

- bool firstWord = true;

- bool firstLine = true;

- int nextBreakable = -1;

- int lastWordBoundary = 0;

- float cachedWordTrailingSpaceWidth[2] = { 0, 0 }; // LTR, RTL

- int firstGlyphLeftOverflow = -1;

- bool breakAll = (styleToUse.wordBreak() == BreakAllWordBreak || styleToUse.wordBreak() == BreakWordBreak) && styleToUse.autoWrap();

- TextRun textRun(text());

- BidiResolver<TextRunIterator, BidiCharacterRun> bidiResolver;

- BidiCharacterRun* run;

- TextDirection textDirection = styleToUse.direction();

- if (isOverride(styleToUse.unicodeBidi())) {

- run = 0;

- } else {

- BidiStatus status(textDirection, false);

- bidiResolver.setStatus(status);

- bidiResolver.setPositionIgnoringNestedIsolates(TextRunIterator(&textRun, 0));

- bool hardLineBreak = false;

- bool reorderRuns = false;

- bidiResolver.createBidiRunsForLine(TextRunIterator(&textRun, textRun.length()), NoVisualOverride, hardLineBreak, reorderRuns);

- BidiRunList<BidiCharacterRun>& bidiRuns = bidiResolver.runs();

- run = bidiRuns.firstRun();

- }

- for (int i = 0; i < len; i++) {

- UChar c = uncheckedCharacterAt(i);

- if (run) {

- // Treat adjacent runs with the same resolved directionality

- // (TextDirection as opposed to WTF::Unicode::Direction) as belonging

- // to the same run to avoid breaking unnecessarily.

- while (i >= run->stop() || (run->next() && run->next()->direction() == run->direction()))

- run = run->next();

- ASSERT(run);

- ASSERT(i <= run->stop());

- textDirection = run->direction();

- }

- bool previousCharacterIsSpace = isSpace;

- bool isNewline = false;

- if (c == newlineCharacter) {

- if (styleToUse.preserveNewline()) {

- m_hasBreak = true;

- isNewline = true;

- isSpace = false;

- } else

- isSpace = true;

- } else if (c == characterTabulation) {

- if (!styleToUse.collapseWhiteSpace()) {

- m_hasTab = true;

- isSpace = false;

- } else

- isSpace = true;

- } else {

- isSpace = c == space;

- }

- bool isBreakableLocation = isNewline || (isSpace && styleToUse.autoWrap());

- if (!i)

- m_hasBreakableStart = isBreakableLocation;

- if (i == len - 1) {

- m_hasBreakableEnd = isBreakableLocation;

- m_hasEndWhiteSpace = isNewline || isSpace;

- }

- if (!ignoringSpaces && styleToUse.collapseWhiteSpace() && previousCharacterIsSpace && isSpace)

- ignoringSpaces = true;

- if (ignoringSpaces && !isSpace)

- ignoringSpaces = false;

- // Ignore spaces and soft hyphens

- if (ignoringSpaces) {

- ASSERT(lastWordBoundary == i);

- lastWordBoundary++;

- continue;

- } else if (c == softHyphen) {

- currMaxWidth += widthFromCache(f, lastWordBoundary, i - lastWordBoundary, leadWidth + currMaxWidth, textDirection, &fallbackFonts, &glyphOverflow);

- if (firstGlyphLeftOverflow < 0)

- firstGlyphLeftOverflow = glyphOverflow.left;

- lastWordBoundary = i + 1;

- continue;

- }

- bool hasBreak = breakIterator.isBreakable(i, nextBreakable, breakAll ? LineBreakType::BreakAll : LineBreakType::Normal);

- bool betweenWords = true;

- int j = i;

- while (c != newlineCharacter && c != space && c != characterTabulation && (c != softHyphen)) {

- j++;

- if (j == len)

- break;

- c = uncheckedCharacterAt(j);

- if (breakIterator.isBreakable(j, nextBreakable) && characterAt(j - 1) != softHyphen)

- break;

- if (breakAll) {

- betweenWords = false;

- break;

- }

- // Terminate word boundary at bidi run boundary.

- if (run)

- j = std::min(j, run->stop() + 1);

- int wordLen = j - i;

- if (wordLen) {

- bool isSpace = (j < len) && c == space;

- // Non-zero only when kerning is enabled, in which case we measure words with their trailing

- // space, then subtract its width.

- float wordTrailingSpaceWidth = 0;

- if (isSpace && (f.fontDescription().typesettingFeatures() & Kerning)) {

- ASSERT(textDirection >=0 && textDirection <= 1);

- if (!cachedWordTrailingSpaceWidth[textDirection])

- cachedWordTrailingSpaceWidth[textDirection] = f.width(constructTextRun(this, f, &space, 1, styleToUse, textDirection)) + wordSpacing;

- wordTrailingSpaceWidth = cachedWordTrailingSpaceWidth[textDirection];

- }

- float w;

- if (wordTrailingSpaceWidth && isSpace)

- w = widthFromCache(f, i, wordLen + 1, leadWidth + currMaxWidth, textDirection, &fallbackFonts, &glyphOverflow) - wordTrailingSpaceWidth;

- else {

- w = widthFromCache(f, i, wordLen, leadWidth + currMaxWidth, textDirection, &fallbackFonts, &glyphOverflow);

- if (c == softHyphen)

- currMinWidth += hyphenWidth(this, f, textDirection);

- }

- if (firstGlyphLeftOverflow < 0)

- firstGlyphLeftOverflow = glyphOverflow.left;

- currMinWidth += w;

- if (betweenWords) {

- if (lastWordBoundary == i)

- currMaxWidth += w;

- else

- currMaxWidth += widthFromCache(f, lastWordBoundary, j - lastWordBoundary, leadWidth + currMaxWidth, textDirection, &fallbackFonts, &glyphOverflow);

- lastWordBoundary = j;

- }

- bool isCollapsibleWhiteSpace = (j < len) && styleToUse.isCollapsibleWhiteSpace(c);

- if (j < len && styleToUse.autoWrap())

- m_hasBreakableChar = true;

- // Add in wordSpacing to our currMaxWidth, but not if this is the last word on a line or the

- // last word in the run.

- if (wordSpacing && (isSpace || isCollapsibleWhiteSpace) && !containsOnlyWhitespace(j, len-j))

- currMaxWidth += wordSpacing;

- if (firstWord) {

- firstWord = false;

- // If the first character in the run is breakable, then we consider ourselves to have a beginning

- // minimum width of 0, since a break could occur right before our run starts, preventing us from ever

- // being appended to a previous text run when considering the total minimum width of the containing block.

- if (hasBreak)

- m_hasBreakableChar = true;

- m_firstLineMinWidth = hasBreak ? 0 : currMinWidth;

- }

- m_lastLineLineMinWidth = currMinWidth;

- if (currMinWidth > m_minWidth)

- m_minWidth = currMinWidth;

- currMinWidth = 0;

- i += wordLen - 1;

- } else {

- // Nowrap can never be broken, so don't bother setting the

- // breakable character boolean. Pre can only be broken if we encounter a newline.

- if (style()->autoWrap() || isNewline)

- m_hasBreakableChar = true;

- if (currMinWidth > m_minWidth)

- m_minWidth = currMinWidth;

- currMinWidth = 0;

- if (isNewline) { // Only set if preserveNewline was true and we saw a newline.

- if (firstLine) {

- firstLine = false;

- leadWidth = 0;

- if (!styleToUse.autoWrap())

- m_firstLineMinWidth = currMaxWidth;

- }

- if (currMaxWidth > m_maxWidth)

- m_maxWidth = currMaxWidth;

- currMaxWidth = 0;

- } else {

- TextRun run = constructTextRun(this, f, this, i, 1, styleToUse, textDirection);

- run.setCharactersLength(len - i);

- run.setCodePath(canUseSimpleFontCodePath() ? TextRun::ForceSimple : TextRun::ForceComplex);

- ASSERT(run.charactersLength() >= run.length());

- run.setTabSize(!style()->collapseWhiteSpace(), style()->tabSize());

- run.setXPos(leadWidth + currMaxWidth);

- currMaxWidth += f.width(run);

- glyphOverflow.right = 0;

- needsWordSpacing = isSpace && !previousCharacterIsSpace && i == len - 1;

- }

- ASSERT(lastWordBoundary == i);

- lastWordBoundary++;

- }

- if (run)

- bidiResolver.runs().deleteRuns();

- if (firstGlyphLeftOverflow > 0)

- glyphOverflow.left = firstGlyphLeftOverflow;

- if ((needsWordSpacing && len > 1) || (ignoringSpaces && !firstWord))

- currMaxWidth += wordSpacing;

- m_minWidth = std::max(currMinWidth, m_minWidth);

- m_maxWidth = std::max(currMaxWidth, m_maxWidth);

- if (!styleToUse.autoWrap())

- m_minWidth = m_maxWidth;

- if (styleToUse.whiteSpace() == PRE) {

- if (firstLine)

- m_firstLineMinWidth = m_maxWidth;

- m_lastLineLineMinWidth = currMaxWidth;

- }

- clearPreferredLogicalWidthsDirty();

-bool RenderText::isAllCollapsibleWhitespace() const

- unsigned length = textLength();

- if (is8Bit()) {

- for (unsigned i = 0; i < length; ++i) {

- if (!style()->isCollapsibleWhiteSpace(characters8()[i]))

- return false;

- }

- return true;

- }

- for (unsigned i = 0; i < length; ++i) {

- if (!style()->isCollapsibleWhiteSpace(characters16()[i]))

- return false;

- }

- return true;

-bool RenderText::containsOnlyWhitespace(unsigned from, unsigned len) const

- ASSERT(m_text);

- StringImpl& text = *m_text.impl();

- unsigned currPos;

- for (currPos = from;

- currPos < from + len && (text[currPos] == newlineCharacter || text[currPos] == space || text[currPos] == characterTabulation);

- currPos++) { }

- return currPos >= (from + len);

-FloatPoint RenderText::firstRunOrigin() const

- return IntPoint(firstRunX(), firstRunY());

-float RenderText::firstRunX() const

- return m_firstTextBox ? m_firstTextBox->x().toFloat() : 0;

-float RenderText::firstRunY() const

- return m_firstTextBox ? m_firstTextBox->y().toFloat() : 0;

-void RenderText::setSelectionState(SelectionState state)

- LayoutObject::setSelectionState(state);

- if (canUpdateSelectionOnRootLineBoxes()) {

- if (state == SelectionStart || state == SelectionEnd || state == SelectionBoth) {

- int startPos, endPos;

- selectionStartEnd(startPos, endPos);

- if (selectionState() == SelectionStart) {

- endPos = textLength();

- // to handle selection from end of text to end of line

- if (startPos && startPos == endPos)

- startPos = endPos - 1;

- } else if (selectionState() == SelectionEnd)

- startPos = 0;

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {

- if (box->isSelected(startPos, endPos)) {

- box->root().setHasSelectedChildren(true);

- }

- } else {

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {

- box->root().setHasSelectedChildren(state == SelectionInside);

- }

- // The containing block can be null in case of an orphaned tree.

- LayoutBlock* containingBlock = this->containingBlock();

- if (containingBlock && !containingBlock->isLayoutView())

- containingBlock->setSelectionState(state);

-void RenderText::setTextWithOffset(PassRefPtr<StringImpl> text, unsigned offset, unsigned len, bool force)

- if (!force && equal(m_text.impl(), text.get()))

- return;

- unsigned oldLen = textLength();

- unsigned newLen = text->length();

- int delta = newLen - oldLen;

- unsigned end = len ? offset + len - 1 : offset;

- RootInlineBox* firstRootBox = 0;

- RootInlineBox* lastRootBox = 0;

- bool dirtiedLines = false;

- // Dirty all text boxes that include characters in between offset and offset+len.

- for (InlineTextBox* curr = firstTextBox(); curr; curr = curr->nextTextBox()) {

- // FIXME: This shouldn't rely on the end of a dirty line box. See https://bugs.webkit.org/show_bug.cgi?id=97264

- // Text run is entirely before the affected range.

- if (curr->end() < offset)

- continue;

- // Text run is entirely after the affected range.

- if (curr->start() > end) {

- curr->offsetRun(delta);

- RootInlineBox* root = &curr->root();

- if (!firstRootBox) {

- firstRootBox = root;

- // The affected area was in between two runs. Go ahead and mark the root box of

- // the run after the affected area as dirty.

- firstRootBox->markDirty();

- dirtiedLines = true;

- }

- lastRootBox = root;

- } else if (curr->end() >= offset && curr->end() <= end) {

- // Text run overlaps with the left end of the affected range.

- curr->dirtyLineBoxes();

- dirtiedLines = true;

- } else if (curr->start() <= offset && curr->end() >= end) {

- // Text run subsumes the affected range.

- curr->dirtyLineBoxes();

- dirtiedLines = true;

- } else if (curr->start() <= end && curr->end() >= end) {

- // Text run overlaps with right end of the affected range.

- curr->dirtyLineBoxes();

- dirtiedLines = true;

- }

- // Now we have to walk all of the clean lines and adjust their cached line break information

- // to reflect our updated offsets.

- if (lastRootBox)

- lastRootBox = lastRootBox->nextRootBox();

- if (firstRootBox) {

- RootInlineBox* prev = firstRootBox->prevRootBox();

- if (prev)

- firstRootBox = prev;

- } else if (lastTextBox()) {

- ASSERT(!lastRootBox);

- firstRootBox = &lastTextBox()->root();

- firstRootBox->markDirty();

- dirtiedLines = true;

- }

- for (RootInlineBox* curr = firstRootBox; curr && curr != lastRootBox; curr = curr->nextRootBox()) {

- if (curr->lineBreakObj() == this && curr->lineBreakPos() > end)

- curr->setLineBreakPos(clampTo<int>(curr->lineBreakPos() + delta));

- }

- // If the text node is empty, dirty the line where new text will be inserted.

- if (!firstTextBox() && parent()) {

- parent()->dirtyLinesFromChangedChild(this);

- dirtiedLines = true;

- }

- m_linesDirty = dirtiedLines;

- setText(text, force || dirtiedLines);

-void RenderText::transformText()

- if (RefPtr<StringImpl> textToTransform = originalText())

- setText(textToTransform.release(), true);

-static inline bool isInlineFlowOrEmptyText(const LayoutObject* o)

- if (o->isLayoutInline())

- return true;

- if (!o->isText())

- return false;

- return toRenderText(o)->text().isEmpty();

-UChar RenderText::previousCharacter() const

- // find previous text renderer if one exists

- const LayoutObject* previousText = previousInPreOrder();

- for (; previousText; previousText = previousText->previousInPreOrder())

- if (!isInlineFlowOrEmptyText(previousText))

- break;

- UChar prev = space;

- if (previousText && previousText->isText())

- if (StringImpl* previousString = toRenderText(previousText)->text().impl())

- prev = (*previousString)[previousString->length() - 1];

- return prev;

-void RenderText::addLayerHitTestRects(LayerHitTestRects&, const Layer* currentLayer, const LayoutPoint& layerOffset, const LayoutRect& containerRect) const

- // Text nodes aren't event targets, so don't descend any further.

-void applyTextTransform(const LayoutStyle* style, String& text, UChar previousCharacter)

- if (!style)

- return;

- switch (style->textTransform()) {

- case TTNONE:

- break;

- case CAPITALIZE:

- makeCapitalized(&text, previousCharacter);

- break;

- case UPPERCASE:

- text = text.upper(style->locale());

- break;

- case LOWERCASE:

- text = text.lower(style->locale());

- break;

- }

-void RenderText::setTextInternal(PassRefPtr<StringImpl> text)

- ASSERT(text);

- m_text = text;

- if (style()) {

- applyTextTransform(style(), m_text, previousCharacter());

- // We use the same characters here as for list markers.

- // See the listMarkerText function in LayoutListMarker.cpp.

- switch (style()->textSecurity()) {

- case TSNONE:

- break;

- case TSCIRCLE:

- secureText(whiteBullet);

- break;

- case TSDISC:

- secureText(bullet);

- break;

- case TSSQUARE:

- secureText(blackSquare);

- }

- ASSERT(m_text);

- ASSERT(!isBR() || (textLength() == 1 && m_text[0] == newlineCharacter));

- m_isAllASCII = m_text.containsOnlyASCII();

- m_canUseSimpleFontCodePath = computeCanUseSimpleFontCodePath();

-void RenderText::secureText(UChar mask)

- if (!m_text.length())

- return;

- int lastTypedCharacterOffsetToReveal = -1;

- UChar revealedText;

- SecureTextTimer* secureTextTimer = gSecureTextTimers ? gSecureTextTimers->get(this) : 0;

- if (secureTextTimer && secureTextTimer->isActive()) {

- lastTypedCharacterOffsetToReveal = secureTextTimer->lastTypedCharacterOffset();

- if (lastTypedCharacterOffsetToReveal >= 0)

- revealedText = m_text[lastTypedCharacterOffsetToReveal];

- }

- m_text.fill(mask);

- if (lastTypedCharacterOffsetToReveal >= 0) {

- m_text.replace(lastTypedCharacterOffsetToReveal, 1, String(&revealedText, 1));

- // m_text may be updated later before timer fires. We invalidate the lastTypedCharacterOffset to avoid inconsistency.

- secureTextTimer->invalidate();

- }

-void RenderText::setText(PassRefPtr<StringImpl> text, bool force)

- ASSERT(text);

- if (!force && equal(m_text.impl(), text.get()))

- return;

- setTextInternal(text);

- // If preferredLogicalWidthsDirty() of an orphan child is true, LayoutObjectChildList::

- // insertChildNode() fails to set true to owner. To avoid that, we call

- // setNeedsLayoutAndPrefWidthsRecalc() only if this RenderText has parent.

- if (parent())

- setNeedsLayoutAndPrefWidthsRecalc();

- m_knownToHaveNoOverflowAndNoFallbackFonts = false;

- if (AXObjectCache* cache = document().existingAXObjectCache())

- cache->textChanged(this);

-void RenderText::dirtyOrDeleteLineBoxesIfNeeded(bool fullLayout)

- if (fullLayout)

- deleteTextBoxes();

- else if (!m_linesDirty)

- dirtyLineBoxes();

- m_linesDirty = false;

-void RenderText::dirtyLineBoxes()

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())

- box->dirtyLineBoxes();

- m_linesDirty = false;

-InlineTextBox* RenderText::createTextBox(int start, unsigned short length)

- return new InlineTextBox(*this, start, length);

-InlineTextBox* RenderText::createInlineTextBox(int start, unsigned short length)

- InlineTextBox* textBox = createTextBox(start, length);

- if (!m_firstTextBox)

- m_firstTextBox = m_lastTextBox = textBox;

- else {

- m_lastTextBox->setNextTextBox(textBox);

- textBox->setPreviousTextBox(m_lastTextBox);

- m_lastTextBox = textBox;

- }

- return textBox;

-void RenderText::positionLineBox(InlineBox* box)

- InlineTextBox* s = toInlineTextBox(box);

- // FIXME: should not be needed!!!

- if (!s->len()) {

- // We want the box to be destroyed.

- s->remove(DontMarkLineBoxes);

- if (m_firstTextBox == s)

- m_firstTextBox = s->nextTextBox();

- else

- s->prevTextBox()->setNextTextBox(s->nextTextBox());

- if (m_lastTextBox == s)

- m_lastTextBox = s->prevTextBox();

- else

- s->nextTextBox()->setPreviousTextBox(s->prevTextBox());

- s->destroy();

- return;

- }

- m_containsReversedText |= !s->isLeftToRightDirection();

-float RenderText::width(unsigned from, unsigned len, float xPos, TextDirection textDirection, bool firstLine, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow* glyphOverflow) const

- if (from >= textLength())

- return 0;

- if (from + len > textLength())

- len = textLength() - from;

- return width(from, len, style(firstLine)->font(), xPos, textDirection, fallbackFonts, glyphOverflow);

-float RenderText::width(unsigned from, unsigned len, const Font& f, float xPos, TextDirection textDirection, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow* glyphOverflow) const

- ASSERT(from + len <= textLength());

- if (!textLength())

- return 0;

- float w;

- if (&f == &style()->font()) {

- if (!style()->preserveNewline() && !from && len == textLength() && (!glyphOverflow || !glyphOverflow->computeBounds)) {

- if (fallbackFonts) {

- ASSERT(glyphOverflow);

- if (preferredLogicalWidthsDirty() || !m_knownToHaveNoOverflowAndNoFallbackFonts) {

- const_cast<RenderText*>(this)->computePreferredLogicalWidths(0, *fallbackFonts, *glyphOverflow);

- // We shouldn't change our mind once we "know".

- ASSERT(!m_knownToHaveNoOverflowAndNoFallbackFonts

- || (fallbackFonts->isEmpty() && glyphOverflow->isZero()));

- m_knownToHaveNoOverflowAndNoFallbackFonts = fallbackFonts->isEmpty() && glyphOverflow->isZero();

- }

- w = m_maxWidth;

- } else {

- w = maxLogicalWidth();

- }

- } else {

- w = widthFromCache(f, from, len, xPos, textDirection, fallbackFonts, glyphOverflow);

- }

- } else {

- TextRun run = constructTextRun(const_cast<RenderText*>(this), f, this, from, len, styleRef(), textDirection);

- run.setCharactersLength(textLength() - from);

- ASSERT(run.charactersLength() >= run.length());

- run.setCodePath(canUseSimpleFontCodePath() ? TextRun::ForceSimple : TextRun::ForceComplex);

- run.setTabSize(!style()->collapseWhiteSpace(), style()->tabSize());

- run.setXPos(xPos);

- w = f.width(run, fallbackFonts, glyphOverflow);

- }

- return w;

-IntRect RenderText::linesBoundingBox() const

- IntRect result;

- ASSERT(!firstTextBox() == !lastTextBox()); // Either both are null or both exist.

- if (firstTextBox() && lastTextBox()) {

- // Return the width of the minimal left side and the maximal right side.

- float logicalLeftSide = 0;

- float logicalRightSide = 0;

- for (InlineTextBox* curr = firstTextBox(); curr; curr = curr->nextTextBox()) {

- if (curr == firstTextBox() || curr->logicalLeft() < logicalLeftSide)

- logicalLeftSide = curr->logicalLeft();

- if (curr == firstTextBox() || curr->logicalRight() > logicalRightSide)

- logicalRightSide = curr->logicalRight();

- }

- bool isHorizontal = style()->isHorizontalWritingMode();

- float x = isHorizontal ? logicalLeftSide : firstTextBox()->x().toFloat();

- float y = isHorizontal ? firstTextBox()->y().toFloat() : logicalLeftSide;

- float width = isHorizontal ? logicalRightSide - logicalLeftSide : lastTextBox()->logicalBottom() - x;

- float height = isHorizontal ? lastTextBox()->logicalBottom() - y : logicalRightSide - logicalLeftSide;

- result = enclosingIntRect(FloatRect(x, y, width, height));

- }

- return result;

-LayoutRect RenderText::linesVisualOverflowBoundingBox() const

- if (!firstTextBox())

- return LayoutRect();

- // Return the width of the minimal left side and the maximal right side.

- LayoutUnit logicalLeftSide = LayoutUnit::max();

- LayoutUnit logicalRightSide = LayoutUnit::min();

- for (InlineTextBox* curr = firstTextBox(); curr; curr = curr->nextTextBox()) {

- LayoutRect logicalVisualOverflow = curr->logicalOverflowRect();

- logicalLeftSide = std::min(logicalLeftSide, logicalVisualOverflow.x());

- logicalRightSide = std::max(logicalRightSide, logicalVisualOverflow.maxX());

- }

- LayoutUnit logicalTop = firstTextBox()->logicalTopVisualOverflow();

- LayoutUnit logicalWidth = logicalRightSide - logicalLeftSide;

- LayoutUnit logicalHeight = lastTextBox()->logicalBottomVisualOverflow() - logicalTop;

- LayoutRect rect(logicalLeftSide, logicalTop, logicalWidth, logicalHeight);

- if (!style()->isHorizontalWritingMode())

- rect = rect.transposedRect();

- return rect;

-LayoutRect RenderText::clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const

- if (style()->visibility() != VISIBLE)

- return LayoutRect();

- LayoutRect paintInvalidationRect(linesVisualOverflowBoundingBox());

- mapRectToPaintInvalidationBacking(paintInvalidationContainer, paintInvalidationRect, paintInvalidationState);

- return paintInvalidationRect;

-LayoutRect RenderText::selectionRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer) const

- ASSERT(!needsLayout());

- if (selectionState() == SelectionNone)

- return LayoutRect();

- LayoutBlock* cb = containingBlock();

- if (!cb)

- return LayoutRect();

- // Now calculate startPos and endPos for painting selection.

- // We include a selection while endPos > 0

- int startPos, endPos;

- if (selectionState() == SelectionInside) {

- // We are fully selected.

- startPos = 0;

- endPos = textLength();

- } else {

- selectionStartEnd(startPos, endPos);

- if (selectionState() == SelectionStart)

- endPos = textLength();

- else if (selectionState() == SelectionEnd)

- startPos = 0;

- }

- LayoutRect rect;

- if (startPos == endPos)

- return rect;

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) {

- rect.unite(box->localSelectionRect(startPos, endPos));

- rect.unite(LayoutRect(ellipsisRectForBox(box, startPos, endPos)));

- }

- mapRectToPaintInvalidationBacking(paintInvalidationContainer, rect, 0);

- // FIXME: groupedMapping() leaks the squashing abstraction.

- if (paintInvalidationContainer->layer()->groupedMapping())

- Layer::mapRectToPaintBackingCoordinates(paintInvalidationContainer, rect);

- return rect;

-int RenderText::caretMinOffset() const

- InlineTextBox* box = firstTextBox();

- if (!box)

- return 0;

- int minOffset = box->start();

- for (box = box->nextTextBox(); box; box = box->nextTextBox())

- minOffset = std::min<int>(minOffset, box->start());

- return minOffset;

-int RenderText::caretMaxOffset() const

- InlineTextBox* box = lastTextBox();

- if (!lastTextBox())

- return textLength();

- int maxOffset = box->start() + box->len();

- for (box = box->prevTextBox(); box; box = box->prevTextBox())

- maxOffset = std::max<int>(maxOffset, box->start() + box->len());

- return maxOffset;

-unsigned RenderText::renderedTextLength() const

- int l = 0;

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())

- l += box->len();

- return l;

-int RenderText::previousOffset(int current) const

- if (isAllASCII() || m_text.is8Bit())

- return current - 1;

- StringImpl* textImpl = m_text.impl();

- TextBreakIterator* iterator = cursorMovementIterator(textImpl->characters16(), textImpl->length());

- if (!iterator)

- return current - 1;

- long result = iterator->preceding(current);

- if (result == TextBreakDone)

- result = current - 1;

- return result;

-#if OS(POSIX)

-#define HANGUL_CHOSEONG_START (0x1100)

-#define HANGUL_CHOSEONG_END (0x115F)

-#define HANGUL_JUNGSEONG_START (0x1160)

-#define HANGUL_JUNGSEONG_END (0x11A2)

-#define HANGUL_JONGSEONG_START (0x11A8)

-#define HANGUL_JONGSEONG_END (0x11F9)

-#define HANGUL_SYLLABLE_START (0xAC00)

-#define HANGUL_SYLLABLE_END (0xD7AF)

-#define HANGUL_JONGSEONG_COUNT (28)

-enum HangulState {

- HangulStateL,

- HangulStateV,

- HangulStateT,

- HangulStateLV,

- HangulStateLVT,

- HangulStateBreak

-};

-inline bool isHangulLVT(UChar32 character)

- return (character - HANGUL_SYLLABLE_START) % HANGUL_JONGSEONG_COUNT;

-inline bool isMark(UChar32 c)

- int8_t charType = u_charType(c);

- return charType == U_NON_SPACING_MARK || charType == U_ENCLOSING_MARK || charType == U_COMBINING_SPACING_MARK;

-inline bool isRegionalIndicator(UChar32 c)

- // National flag emoji each consists of a pair of regional indicator symbols.

- return 0x1F1E6 <= c && c <= 0x1F1FF;

-#endif

-int RenderText::previousOffsetForBackwardDeletion(int current) const

-#if OS(POSIX)

- ASSERT(m_text);

- StringImpl& text = *m_text.impl();

- UChar32 character;

- bool sawRegionalIndicator = false;

- while (current > 0) {

- if (U16_IS_TRAIL(text[--current]))

- --current;

- if (current < 0)

- break;

- UChar32 character = text.characterStartingAt(current);

- if (sawRegionalIndicator) {

- // We don't check if the pair of regional indicator symbols before current position can actually be combined

- // into a flag, and just delete it. This may not agree with how the pair is rendered in edge cases,

- // but is good enough in practice.

- if (isRegionalIndicator(character))

- break;

- // Don't delete a preceding character that isn't a regional indicator symbol.

- U16_FWD_1_UNSAFE(text, current);

- }

- // We don't combine characters in Armenian ... Limbu range for backward deletion.

- if ((character >= 0x0530) && (character < 0x1950))

- break;

- if (isRegionalIndicator(character)) {

- sawRegionalIndicator = true;

- continue;

- }

- if (!isMark(character) && (character != 0xFF9E) && (character != 0xFF9F))

- break;

- }

- if (current <= 0)

- return current;

- // Hangul

- character = text.characterStartingAt(current);

- if (((character >= HANGUL_CHOSEONG_START) && (character <= HANGUL_JONGSEONG_END)) || ((character >= HANGUL_SYLLABLE_START) && (character <= HANGUL_SYLLABLE_END))) {

- HangulState state;

- if (character < HANGUL_JUNGSEONG_START)

- state = HangulStateL;

- else if (character < HANGUL_JONGSEONG_START)

- state = HangulStateV;

- else if (character < HANGUL_SYLLABLE_START)

- state = HangulStateT;

- else

- state = isHangulLVT(character) ? HangulStateLVT : HangulStateLV;

- while (current > 0 && ((character = text.characterStartingAt(current - 1)) >= HANGUL_CHOSEONG_START) && (character <= HANGUL_SYLLABLE_END) && ((character <= HANGUL_JONGSEONG_END) || (character >= HANGUL_SYLLABLE_START))) {

- switch (state) {

- case HangulStateV:

- if (character <= HANGUL_CHOSEONG_END)

- state = HangulStateL;

- else if ((character >= HANGUL_SYLLABLE_START) && (character <= HANGUL_SYLLABLE_END) && !isHangulLVT(character))

- state = HangulStateLV;

- else if (character > HANGUL_JUNGSEONG_END)

- state = HangulStateBreak;

- break;

- case HangulStateT:

- if ((character >= HANGUL_JUNGSEONG_START) && (character <= HANGUL_JUNGSEONG_END))

- state = HangulStateV;

- else if ((character >= HANGUL_SYLLABLE_START) && (character <= HANGUL_SYLLABLE_END))

- state = (isHangulLVT(character) ? HangulStateLVT : HangulStateLV);

- else if (character < HANGUL_JUNGSEONG_START)

- state = HangulStateBreak;

- break;

- default:

- state = (character < HANGUL_JUNGSEONG_START) ? HangulStateL : HangulStateBreak;

- break;

- }

- if (state == HangulStateBreak)

- break;

- --current;

- }

- return current;

-#else

- // Platforms other than Unix-like delete by one code point.

- if (U16_IS_TRAIL(m_text[--current]))

- --current;

- if (current < 0)

- current = 0;

- return current;

-#endif

-int RenderText::nextOffset(int current) const

- if (isAllASCII() || m_text.is8Bit())

- return current + 1;

- StringImpl* textImpl = m_text.impl();

- TextBreakIterator* iterator = cursorMovementIterator(textImpl->characters16(), textImpl->length());

- if (!iterator)

- return current + 1;

- long result = iterator->following(current);

- if (result == TextBreakDone)

- result = current + 1;

- return result;

-bool RenderText::computeCanUseSimpleFontCodePath() const

- if (isAllASCII() || m_text.is8Bit())

- return true;

- return Character::characterRangeCodePath(characters16(), length()) == SimplePath;

-#if ENABLE(ASSERT)

-void RenderText::checkConsistency() const

-#ifdef CHECK_CONSISTENCY

- const InlineTextBox* prev = 0;

- for (const InlineTextBox* child = m_firstTextBox; child != 0; child = child->nextTextBox()) {

- ASSERT(child->renderer() == this);

- ASSERT(child->prevTextBox() == prev);

- prev = child;

- }

- ASSERT(prev == m_lastTextBox);

-#endif

-void RenderText::momentarilyRevealLastTypedCharacter(unsigned lastTypedCharacterOffset)

- if (!gSecureTextTimers)

- gSecureTextTimers = new SecureTextTimerMap;

- SecureTextTimer* secureTextTimer = gSecureTextTimers->get(this);

- if (!secureTextTimer) {

- secureTextTimer = new SecureTextTimer(this);

- gSecureTextTimers->add(this, secureTextTimer);

- }

- secureTextTimer->restartWithNewText(lastTypedCharacterOffset);

-PassRefPtr<AbstractInlineTextBox> RenderText::firstAbstractInlineTextBox()

- return AbstractInlineTextBox::getOrCreate(this, m_firstTextBox);

-void RenderText::invalidateDisplayItemClients(DisplayItemList* displayItemList) const

- LayoutObject::invalidateDisplayItemClients(displayItemList);

- for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox())

- displayItemList->invalidate(box->displayItemClient());

-} // namespace blink

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