| /* |
| * (C) 1999 Lars Knoll (knoll@kde.org) |
| * (C) 2000 Dirk Mueller (mueller@kde.org) |
| * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved. |
| * Copyright (C) 2006 Andrew Wellington (proton@wiretapped.net) |
| * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com) |
| * |
| * 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 "core/layout/LayoutText.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/layout/LayoutBlock.h" |
| #include "core/layout/LayoutTableCell.h" |
| #include "core/layout/LayoutTextCombine.h" |
| #include "core/layout/LayoutView.h" |
| #include "core/layout/api/LineLayoutBox.h" |
| #include "core/layout/line/AbstractInlineTextBox.h" |
| #include "core/layout/line/EllipsisBox.h" |
| #include "core/layout/line/GlyphOverflow.h" |
| #include "core/layout/line/InlineTextBox.h" |
| #include "platform/fonts/CharacterRange.h" |
| #include "platform/geometry/FloatQuad.h" |
| #include "platform/text/BidiResolver.h" |
| #include "platform/text/Character.h" |
| #include "platform/text/Hyphenation.h" |
| #include "platform/text/TextBreakIterator.h" |
| #include "platform/text/TextRunIterator.h" |
| #include "public/platform/Platform.h" |
| #include "public/platform/WebScheduler.h" |
| #include "public/platform/WebThread.h" |
| #include "wtf/text/StringBuffer.h" |
| #include "wtf/text/StringBuilder.h" |
| |
| using namespace WTF; |
| using namespace Unicode; |
| |
| namespace blink { |
| |
| struct SameSizeAsLayoutText : public LayoutObject { |
| uint32_t bitfields : 16; |
| float widths[4]; |
| String text; |
| void* pointers[2]; |
| }; |
| |
| static_assert(sizeof(LayoutText) == sizeof(SameSizeAsLayoutText), |
| "LayoutText should stay small"); |
| |
| class SecureTextTimer; |
| typedef HashMap<LayoutText*, SecureTextTimer*> SecureTextTimerMap; |
| static SecureTextTimerMap* gSecureTextTimers = nullptr; |
| |
| class SecureTextTimer final : public TimerBase { |
| public: |
| SecureTextTimer(LayoutText* layoutText) |
| : TimerBase(Platform::current() |
| ->currentThread() |
| ->scheduler() |
| ->timerTaskRunner()), |
| m_layoutText(layoutText), |
| m_lastTypedCharacterOffset(-1) {} |
| |
| void restartWithNewText(unsigned lastTypedCharacterOffset) { |
| m_lastTypedCharacterOffset = lastTypedCharacterOffset; |
| if (Settings* settings = m_layoutText->document().settings()) |
| startOneShot(settings->passwordEchoDurationInSeconds(), BLINK_FROM_HERE); |
| } |
| void invalidate() { m_lastTypedCharacterOffset = -1; } |
| unsigned lastTypedCharacterOffset() { return m_lastTypedCharacterOffset; } |
| |
| private: |
| void fired() override { |
| ASSERT(gSecureTextTimers->contains(m_layoutText)); |
| m_layoutText->setText( |
| m_layoutText->text().impl(), |
| true /* forcing setting text as it may be masked later */); |
| } |
| |
| LayoutText* m_layoutText; |
| 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 == noBreakSpaceCharacter ? spaceCharacter : previous; |
| for (unsigned i = 1; i < length + 1; i++) { |
| // Replace   with a real space since ICU no longer treats   as a |
| // word separator. |
| if (input[i - 1] == noBreakSpaceCharacter) |
| stringWithPrevious[i] = spaceCharacter; |
| 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] == noBreakSpaceCharacter |
| ? noBreakSpaceCharacter |
| : toTitleCase(stringWithPrevious[startOfWord])); |
| for (int i = startOfWord + 1; i < endOfWord; i++) |
| result.append(input[i - 1]); |
| } |
| |
| *string = result.toString(); |
| } |
| |
| LayoutText::LayoutText(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(std::move(str)), |
| m_firstTextBox(nullptr), |
| m_lastTextBox(nullptr) { |
| ASSERT(m_text); |
| // FIXME: Some clients of LayoutText (and subclasses) pass Document as node to |
| // create anonymous layoutObject. |
| // They should be switched to passing null and using setDocumentForAnonymous. |
| if (node && node->isDocumentNode()) |
| setDocumentForAnonymous(toDocument(node)); |
| |
| setIsText(); |
| |
| view()->frameView()->incrementVisuallyNonEmptyCharacterCount(m_text.length()); |
| } |
| |
| #if ENABLE(ASSERT) |
| |
| LayoutText::~LayoutText() { |
| ASSERT(!m_firstTextBox); |
| ASSERT(!m_lastTextBox); |
| } |
| |
| #endif |
| |
| bool LayoutText::isTextFragment() const { |
| return false; |
| } |
| |
| bool LayoutText::isWordBreak() const { |
| return false; |
| } |
| |
| void LayoutText::styleDidChange(StyleDifference diff, |
| const ComputedStyle* 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(LayoutInvalidationReason::StyleChange); |
| m_knownToHaveNoOverflowAndNoFallbackFonts = false; |
| } |
| |
| const ComputedStyle& newStyle = styleRef(); |
| ETextTransform oldTransform = |
| oldStyle ? oldStyle->textTransform() : ETextTransform::None; |
| 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. |
| if (!text().containsOnlyWhitespace()) |
| newStyle.font().willUseFontData(text()); |
| } |
| |
| void LayoutText::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 LayoutText::willBeDestroyed() { |
| if (SecureTextTimer* secureTextTimer = |
| gSecureTextTimers ? gSecureTextTimers->take(this) : 0) |
| delete secureTextTimer; |
| |
| removeAndDestroyTextBoxes(); |
| LayoutObject::willBeDestroyed(); |
| } |
| |
| void LayoutText::extractTextBox(InlineTextBox* box) { |
| checkConsistency(); |
| |
| m_lastTextBox = box->prevTextBox(); |
| if (box == m_firstTextBox) |
| m_firstTextBox = nullptr; |
| if (box->prevTextBox()) |
| box->prevTextBox()->setNextTextBox(nullptr); |
| box->setPreviousTextBox(nullptr); |
| for (InlineTextBox* curr = box; curr; curr = curr->nextTextBox()) |
| curr->setExtracted(); |
| |
| checkConsistency(); |
| } |
| |
| void LayoutText::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 LayoutText::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 LayoutText::deleteTextBoxes() { |
| if (firstTextBox()) { |
| InlineTextBox* next; |
| for (InlineTextBox* curr = firstTextBox(); curr; curr = next) { |
| next = curr->nextTextBox(); |
| curr->destroy(); |
| } |
| m_firstTextBox = m_lastTextBox = nullptr; |
| } |
| } |
| |
| PassRefPtr<StringImpl> LayoutText::originalText() const { |
| Node* e = node(); |
| return (e && e->isTextNode()) ? toText(e)->dataImpl() : 0; |
| } |
| |
| String LayoutText::plainText() const { |
| if (node()) |
| return blink::plainText(EphemeralRange::rangeOfContents(*node())); |
| |
| // 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(spaceCharacter); |
| } |
| return plainTextBuilder.toString(); |
| } |
| |
| void LayoutText::absoluteRects(Vector<IntRect>& rects, |
| const LayoutPoint& accumulatedOffset) const { |
| for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) |
| rects.append(enclosingIntRect(LayoutRect( |
| LayoutPoint(accumulatedOffset) + box->topLeft(), box->size()))); |
| } |
| |
| 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 LayoutText::absoluteRectsForRange(Vector<IntRect>& rects, |
| unsigned start, |
| unsigned end, |
| bool useSelectionHeight) { |
| // 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()); |
| 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).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).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 LayoutText::quads(Vector<FloatQuad>& quads, |
| ClippingOption option, |
| LocalOrAbsoluteOption localOrAbsolute) const { |
| for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) { |
| FloatRect boundaries(box->calculateBoundaries()); |
| |
| // 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()); |
| } |
| if (localOrAbsolute == AbsoluteQuads) |
| quads.append(localToAbsoluteQuad(boundaries)); |
| else |
| quads.append(boundaries); |
| } |
| } |
| |
| void LayoutText::absoluteQuads(Vector<FloatQuad>& quads) const { |
| this->quads(quads, NoClipping, AbsoluteQuads); |
| } |
| |
| void LayoutText::absoluteQuadsForRange(Vector<FloatQuad>& quads, |
| unsigned start, |
| unsigned end, |
| bool useSelectionHeight) { |
| // 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)); |
| |
| const unsigned caretMinOffset = static_cast<unsigned>(this->caretMinOffset()); |
| const unsigned caretMaxOffset = static_cast<unsigned>(this->caretMaxOffset()); |
| |
| // Narrows |start| and |end| into |caretMinOffset| and |careMaxOffset| |
| // to ignore unrendered leading and trailing whitespaces. |
| start = std::min(std::max(caretMinOffset, start), caretMaxOffset); |
| end = std::min(std::max(caretMinOffset, end), caretMaxOffset); |
| |
| 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) { |
| LayoutRect r(box->calculateBoundaries()); |
| if (useSelectionHeight) { |
| LayoutRect selectionRect = box->localSelectionRect(start, end); |
| if (box->isHorizontal()) { |
| r.setHeight(selectionRect.height()); |
| r.setY(selectionRect.y()); |
| } else { |
| r.setWidth(selectionRect.width()); |
| r.setX(selectionRect.x()); |
| } |
| } |
| quads.append(localToAbsoluteQuad(FloatRect(r))); |
| } else { |
| FloatRect rect = localQuadForTextBox(box, start, end, useSelectionHeight); |
| if (!rect.isZero()) |
| quads.append(localToAbsoluteQuad(rect)); |
| } |
| } |
| } |
| |
| FloatRect LayoutText::localBoundingBoxRectForAccessibility() const { |
| FloatRect result; |
| Vector<FloatQuad> quads; |
| this->quads(quads, LayoutText::ClipToEllipsis, LayoutText::LocalQuads); |
| for (const FloatQuad& quad : quads) |
| result.unite(quad.boundingBox()); |
| return result; |
| } |
| |
| 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 TextAffinity::Upstream |
| // affinity if possible |
| shouldAffinityBeDownstream = UpstreamIfPositionIsNotAtStart; |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static PositionWithAffinity createPositionWithAffinityForBox( |
| const InlineBox* box, |
| int offset, |
| ShouldAffinityBeDownstream shouldAffinityBeDownstream) { |
| TextAffinity affinity = VP_DEFAULT_AFFINITY; |
| switch (shouldAffinityBeDownstream) { |
| case AlwaysDownstream: |
| affinity = TextAffinity::Downstream; |
| break; |
| case AlwaysUpstream: |
| affinity = VP_UPSTREAM_IF_POSSIBLE; |
| break; |
| case UpstreamIfPositionIsNotAtStart: |
| affinity = offset > box->caretMinOffset() ? VP_UPSTREAM_IF_POSSIBLE |
| : TextAffinity::Downstream; |
| break; |
| } |
| int textStartOffset = |
| box->getLineLayoutItem().isText() |
| ? LineLayoutText(box->getLineLayoutItem()).textStartOffset() |
| : 0; |
| return box->getLineLayoutItem().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->getLineLayoutItem().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->getLineLayoutItem().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 LayoutText::positionForPoint(const LayoutPoint& point) { |
| if (!firstTextBox() || textLength() == 0) |
| return createPositionWithAffinity(0); |
| |
| LayoutUnit pointLineDirection = |
| firstTextBox()->isHorizontal() ? point.x() : point.y(); |
| LayoutUnit pointBlockDirection = |
| firstTextBox()->isHorizontal() ? point.y() : point.x(); |
| bool blocksAreFlipped = style()->isFlippedBlocksWritingMode(); |
| |
| InlineTextBox* lastBox = nullptr; |
| 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.toInt(), box, |
| shouldAffinityBeDownstream)) |
| return createPositionWithAffinityForBoxAfterAdjustingOffsetForBiDi( |
| box, box->offsetForPosition(pointLineDirection), |
| shouldAffinityBeDownstream); |
| } |
| } |
| lastBox = box; |
| } |
| |
| if (lastBox) { |
| ShouldAffinityBeDownstream shouldAffinityBeDownstream; |
| lineDirectionPointFitsInBox(pointLineDirection.toInt(), lastBox, |
| shouldAffinityBeDownstream); |
| return createPositionWithAffinityForBoxAfterAdjustingOffsetForBiDi( |
| lastBox, |
| lastBox->offsetForPosition(pointLineDirection) + lastBox->start(), |
| shouldAffinityBeDownstream); |
| } |
| return createPositionWithAffinity(0); |
| } |
| |
| LayoutRect LayoutText::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().toInt(); |
| int top = box->root().selectionTop().toInt(); |
| |
| // Go ahead and round left to snap it to the nearest pixel. |
| LayoutUnit left = box->positionForOffset(caretOffset); |
| |
| // Distribute the caret's width to either side of the offset. |
| LayoutUnit caretWidthLeftOfOffset = caretWidth() / 2; |
| left -= caretWidthLeftOfOffset; |
| LayoutUnit caretWidthRightOfOffset = caretWidth() - caretWidthLeftOfOffset; |
| |
| left = LayoutUnit(left.round()); |
| |
| LayoutUnit rootLeft = box->root().logicalLeft(); |
| LayoutUnit 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 ComputedStyle& cbStyle = cb->styleRef(); |
| |
| LayoutUnit leftEdge; |
| LayoutUnit rightEdge; |
| leftEdge = std::min(LayoutUnit(), rootLeft); |
| rightEdge = std::max(cb->logicalWidth(), rootRight); |
| |
| bool rightAligned = false; |
| switch (cbStyle.textAlign()) { |
| case ETextAlign::Right: |
| case ETextAlign::WebkitRight: |
| rightAligned = true; |
| break; |
| case ETextAlign::Left: |
| case ETextAlign::WebkitLeft: |
| case ETextAlign::Center: |
| case ETextAlign::WebkitCenter: |
| break; |
| case ETextAlign::Justify: |
| case ETextAlign::Start: |
| rightAligned = !cbStyle.isLeftToRightDirection(); |
| break; |
| case ETextAlign::End: |
| rightAligned = cbStyle.isLeftToRightDirection(); |
| break; |
| } |
| |
| // for unicode-bidi: plaintext, use inlineBoxBidiLevel() to test the correct |
| // direction for the cursor. |
| if (rightAligned && style()->unicodeBidi() == Plaintext) { |
| 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.toInt(), top, caretWidth().toInt(), height) |
| : IntRect(top, left.toInt(), height, caretWidth().toInt())); |
| } |
| |
| ALWAYS_INLINE float LayoutText::widthFromFont( |
| const Font& f, |
| int start, |
| int len, |
| float leadWidth, |
| float textWidthSoFar, |
| TextDirection textDirection, |
| HashSet<const SimpleFontData*>* fallbackFonts, |
| FloatRect* glyphBoundsAccumulation) const { |
| if (style()->hasTextCombine() && isCombineText()) { |
| const LayoutTextCombine* combineText = toLayoutTextCombine(this); |
| if (combineText->isCombined()) |
| return combineText->combinedTextWidth(f); |
| } |
| |
| TextRun run = |
| constructTextRun(f, this, start, len, styleRef(), textDirection); |
| run.setCharactersLength(textLength() - start); |
| ASSERT(run.charactersLength() >= run.length()); |
| run.setTabSize(!style()->collapseWhiteSpace(), style()->getTabSize()); |
| run.setXPos(leadWidth + textWidthSoFar); |
| |
| FloatRect newGlyphBounds; |
| float result = f.width(run, fallbackFonts, |
| glyphBoundsAccumulation ? &newGlyphBounds : nullptr); |
| if (glyphBoundsAccumulation) { |
| newGlyphBounds.move(textWidthSoFar, 0); |
| glyphBoundsAccumulation->unite(newGlyphBounds); |
| } |
| return result; |
| } |
| |
| void LayoutText::trimmedPrefWidths(LayoutUnit leadWidthLayoutUnit, |
| LayoutUnit& firstLineMinWidth, |
| bool& hasBreakableStart, |
| LayoutUnit& lastLineMinWidth, |
| bool& hasBreakableEnd, |
| bool& hasBreakableChar, |
| bool& hasBreak, |
| LayoutUnit& firstLineMaxWidth, |
| LayoutUnit& lastLineMaxWidth, |
| LayoutUnit& minWidth, |
| LayoutUnit& maxWidth, |
| bool& stripFrontSpaces, |
| TextDirection direction) { |
| float floatMinWidth = 0.0f, floatMaxWidth = 0.0f; |
| |
| // Convert leadWidth to a float here, to avoid multiple implict conversions |
| // below. |
| float leadWidth = leadWidthLayoutUnit.toFloat(); |
| |
| 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 = LayoutUnit(); |
| lastLineMinWidth = LayoutUnit(); |
| firstLineMaxWidth = LayoutUnit(); |
| lastLineMaxWidth = LayoutUnit(); |
| minWidth = LayoutUnit(); |
| maxWidth = LayoutUnit(); |
| hasBreak = false; |
| return; |
| } |
| |
| floatMinWidth = m_minWidth; |
| floatMaxWidth = m_maxWidth; |
| |
| firstLineMinWidth = LayoutUnit(m_firstLineMinWidth); |
| lastLineMinWidth = LayoutUnit(m_lastLineLineMinWidth); |
| |
| hasBreakableChar = m_hasBreakableChar; |
| hasBreak = m_hasBreak; |
| |
| ASSERT(m_text); |
| StringImpl& text = *m_text.impl(); |
| if (text[0] == spaceCharacter || |
| (text[0] == newlineCharacter && !style()->preserveNewline()) || |
| text[0] == tabulationCharacter) { |
| const Font& font = style()->font(); // FIXME: This ignores first-line. |
| if (stripFrontSpaces) { |
| const UChar spaceChar = spaceCharacter; |
| TextRun run = |
| constructTextRun(font, &spaceChar, 1, styleRef(), direction); |
| float spaceWidth = font.width(run); |
| floatMaxWidth -= spaceWidth; |
| } else { |
| floatMaxWidth += font.getFontDescription().wordSpacing(); |
| } |
| } |
| |
| stripFrontSpaces = collapseWhiteSpace && m_hasEndWhiteSpace; |
| |
| if (!style()->autoWrap() || floatMinWidth > floatMaxWidth) |
| floatMinWidth = floatMaxWidth; |
| |
| // 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 = LayoutUnit(floatMaxWidth); |
| lastLineMaxWidth = LayoutUnit(floatMaxWidth); |
| for (int i = 0; i < len; i++) { |
| int linelen = 0; |
| while (i + linelen < len && text[i + linelen] != newlineCharacter) |
| linelen++; |
| |
| if (linelen) { |
| lastLineMaxWidth = LayoutUnit( |
| widthFromFont(f, i, linelen, leadWidth, lastLineMaxWidth.toFloat(), |
| direction, nullptr, nullptr)); |
| if (firstLine) { |
| firstLine = false; |
| leadWidth = 0.f; |
| firstLineMaxWidth = lastLineMaxWidth; |
| } |
| i += linelen; |
| } else if (firstLine) { |
| firstLineMaxWidth = LayoutUnit(); |
| firstLine = false; |
| leadWidth = 0.f; |
| } |
| |
| 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 = LayoutUnit(); |
| } |
| } |
| } |
| |
| minWidth = LayoutUnit::fromFloatCeil(floatMinWidth); |
| maxWidth = LayoutUnit::fromFloatCeil(floatMaxWidth); |
| } |
| |
| float LayoutText::minLogicalWidth() const { |
| if (preferredLogicalWidthsDirty()) |
| const_cast<LayoutText*>(this)->computePreferredLogicalWidths(0); |
| |
| return m_minWidth; |
| } |
| |
| float LayoutText::maxLogicalWidth() const { |
| if (preferredLogicalWidthsDirty()) |
| const_cast<LayoutText*>(this)->computePreferredLogicalWidths(0); |
| |
| return m_maxWidth; |
| } |
| |
| void LayoutText::computePreferredLogicalWidths(float leadWidth) { |
| HashSet<const SimpleFontData*> fallbackFonts; |
| FloatRect glyphBounds; |
| computePreferredLogicalWidths(leadWidth, fallbackFonts, glyphBounds); |
| } |
| |
| static float minWordFragmentWidthForBreakAll(LayoutText* layoutText, |
| const ComputedStyle& style, |
| const Font& font, |
| TextDirection textDirection, |
| int start, |
| int length) { |
| DCHECK_GT(length, 0); |
| LazyLineBreakIterator breakIterator(layoutText->text(), style.locale()); |
| int nextBreakable = -1; |
| float min = std::numeric_limits<float>::max(); |
| int end = start + length; |
| for (int i = start; i < end;) { |
| breakIterator.isBreakable(i + 1, nextBreakable, LineBreakType::BreakAll); |
| int fragmentLength = (nextBreakable > i ? nextBreakable : length) - i; |
| // The correct behavior is to measure width without re-shaping, but we |
| // reshape each fragment here because a) the current line breaker does not |
| // support it, b) getCharacterRange() can reshape if the text is too long |
| // to fit in the cache, and c) each fragment here is almost 1 char and thus |
| // reshape is fast. |
| TextRun run = constructTextRun(font, layoutText, i, fragmentLength, style, |
| textDirection); |
| float fragmentWidth = font.width(run); |
| min = std::min(min, fragmentWidth); |
| i += fragmentLength; |
| } |
| return min; |
| } |
| |
| static float maxWordFragmentWidth(LayoutText* layoutText, |
| const ComputedStyle& style, |
| const Font& font, |
| TextDirection textDirection, |
| Hyphenation& hyphenation, |
| unsigned wordOffset, |
| unsigned wordLength, |
| int& suffixStart) { |
| suffixStart = 0; |
| if (wordLength <= Hyphenation::minimumSuffixLength) |
| return 0; |
| |
| Vector<size_t, 8> hyphenLocations = hyphenation.hyphenLocations( |
| StringView(layoutText->text(), wordOffset, wordLength)); |
| if (hyphenLocations.isEmpty()) |
| return 0; |
| |
| float minimumFragmentWidthToConsider = Hyphenation::minimumPrefixWidth(font); |
| float maxFragmentWidth = 0; |
| TextRun run = constructTextRun(font, layoutText, wordOffset, wordLength, |
| style, textDirection); |
| size_t end = wordLength; |
| for (size_t start : hyphenLocations) { |
| float fragmentWidth = font.getCharacterRange(run, start, end).width(); |
| |
| if (fragmentWidth <= minimumFragmentWidthToConsider) |
| continue; |
| |
| maxFragmentWidth = std::max(maxFragmentWidth, fragmentWidth); |
| end = start; |
| } |
| suffixStart = hyphenLocations.first(); |
| return maxFragmentWidth + layoutText->hyphenWidth(font, textDirection); |
| } |
| |
| void LayoutText::computePreferredLogicalWidths( |
| float leadWidth, |
| HashSet<const SimpleFontData*>& fallbackFonts, |
| FloatRect& glyphBounds) { |
| 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 ComputedStyle& 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 |
| |
| bool breakAll = (styleToUse.wordBreak() == BreakAllWordBreak || |
| styleToUse.wordBreak() == BreakWordBreak) && |
| styleToUse.autoWrap(); |
| bool keepAll = |
| styleToUse.wordBreak() == KeepAllWordBreak && styleToUse.autoWrap(); |
| |
| Hyphenation* hyphenation = styleToUse.getHyphenation(); |
| bool disableSoftHyphen = styleToUse.getHyphens() == HyphensNone; |
| float maxWordWidth = 0; |
| if (!hyphenation) |
| maxWordWidth = std::numeric_limits<float>::infinity(); |
| |
| BidiResolver<TextRunIterator, BidiCharacterRun> bidiResolver; |
| BidiCharacterRun* run; |
| TextDirection textDirection = styleToUse.direction(); |
| if ((is8Bit() && textDirection == LTR) || |
| isOverride(styleToUse.unicodeBidi())) { |
| run = 0; |
| } else { |
| TextRun textRun(text()); |
| 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 == tabulationCharacter) { |
| if (!styleToUse.collapseWhiteSpace()) { |
| m_hasTab = true; |
| isSpace = false; |
| } else { |
| isSpace = true; |
| } |
| } else { |
| isSpace = c == spaceCharacter; |
| } |
| |
| 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; |
| } |
| if (c == softHyphenCharacter && !disableSoftHyphen) { |
| currMaxWidth += widthFromFont(f, lastWordBoundary, i - lastWordBoundary, |
| leadWidth, currMaxWidth, textDirection, |
| &fallbackFonts, &glyphBounds); |
| lastWordBoundary = i + 1; |
| continue; |
| } |
| |
| bool hasBreak = breakIterator.isBreakable( |
| i, nextBreakable, |
| keepAll ? LineBreakType::KeepAll : LineBreakType::Normal); |
| bool betweenWords = true; |
| int j = i; |
| while (c != newlineCharacter && c != spaceCharacter && |
| c != tabulationCharacter && |
| (c != softHyphenCharacter || disableSoftHyphen)) { |
| j++; |
| if (j == len) |
| break; |
| c = uncheckedCharacterAt(j); |
| if (breakIterator.isBreakable(j, nextBreakable) && |
| characterAt(j - 1) != softHyphenCharacter) |
| 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 == spaceCharacter; |
| |
| // 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.getFontDescription().getTypesettingFeatures() & Kerning)) { |
| ASSERT(textDirection >= 0 && textDirection <= 1); |
| if (!cachedWordTrailingSpaceWidth[textDirection]) |
| cachedWordTrailingSpaceWidth[textDirection] = |
| f.width(constructTextRun(f, &spaceCharacter, 1, styleToUse, |
| textDirection)) + |
| wordSpacing; |
| wordTrailingSpaceWidth = cachedWordTrailingSpaceWidth[textDirection]; |
| } |
| |
| float w; |
| if (wordTrailingSpaceWidth && isSpace) { |
| w = widthFromFont(f, i, wordLen + 1, leadWidth, currMaxWidth, |
| textDirection, &fallbackFonts, &glyphBounds) - |
| wordTrailingSpaceWidth; |
| } else { |
| w = widthFromFont(f, i, wordLen, leadWidth, currMaxWidth, textDirection, |
| &fallbackFonts, &glyphBounds); |
| if (c == softHyphenCharacter && !disableSoftHyphen) |
| currMinWidth += hyphenWidth(f, textDirection); |
| } |
| |
| if (w > maxWordWidth) { |
| DCHECK(hyphenation); |
| int suffixStart; |
| float maxFragmentWidth = |
| maxWordFragmentWidth(this, styleToUse, f, textDirection, |
| *hyphenation, i, wordLen, suffixStart); |
| if (suffixStart) { |
| float suffixWidth; |
| if (wordTrailingSpaceWidth && isSpace) |
| suffixWidth = |
| widthFromFont(f, i + suffixStart, wordLen - suffixStart + 1, |
| leadWidth, currMaxWidth, textDirection, |
| &fallbackFonts, &glyphBounds) - |
| wordTrailingSpaceWidth; |
| else |
| suffixWidth = widthFromFont( |
| f, i + suffixStart, wordLen - suffixStart, leadWidth, |
| currMaxWidth, textDirection, &fallbackFonts, &glyphBounds); |
| maxFragmentWidth = std::max(maxFragmentWidth, suffixWidth); |
| currMinWidth += maxFragmentWidth - w; |
| maxWordWidth = std::max(maxWordWidth, maxFragmentWidth); |
| } else { |
| maxWordWidth = w; |
| } |
| } |
| |
| if (breakAll) { |
| // Because sum of character widths may not be equal to the word width, |
| // we need to measure twice; once with normal break for max width, |
| // another with break-all for min width. |
| currMinWidth = minWordFragmentWidthForBreakAll( |
| this, styleToUse, f, textDirection, i, wordLen); |
| } else { |
| currMinWidth += w; |
| } |
| if (betweenWords) { |
| if (lastWordBoundary == i) |
| currMaxWidth += w; |
| else |
| currMaxWidth += widthFromFont( |
| f, lastWordBoundary, j - lastWordBoundary, leadWidth, |
| currMaxWidth, textDirection, &fallbackFonts, &glyphBounds); |
| 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; |
| |
| // Only set if preserveNewline was true and we saw a newline. |
| if (isNewline) { |
| 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(f, this, i, 1, styleToUse, textDirection); |
| run.setCharactersLength(len - i); |
| ASSERT(run.charactersLength() >= run.length()); |
| run.setTabSize(!style()->collapseWhiteSpace(), style()->getTabSize()); |
| run.setXPos(leadWidth + currMaxWidth); |
| |
| currMaxWidth += f.width(run); |
| needsWordSpacing = isSpace && !previousCharacterIsSpace && i == len - 1; |
| } |
| ASSERT(lastWordBoundary == i); |
| lastWordBoundary++; |
| } |
| } |
| if (run) |
| bidiResolver.runs().deleteRuns(); |
| |
| 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() == EWhiteSpace::Pre) { |
| if (firstLine) |
| m_firstLineMinWidth = m_maxWidth; |
| m_lastLineLineMinWidth = currMaxWidth; |
| } |
| |
| const SimpleFontData* fontData = f.primaryFont(); |
| DCHECK(fontData); |
| |
| GlyphOverflow glyphOverflow; |
| if (fontData) { |
| glyphOverflow.setFromBounds( |
| glyphBounds, fontData->getFontMetrics().floatAscent(), |
| fontData->getFontMetrics().floatDescent(), m_maxWidth); |
| } |
| // We shouldn't change our mind once we "know". |
| ASSERT(!m_knownToHaveNoOverflowAndNoFallbackFonts || |
| (fallbackFonts.isEmpty() && glyphOverflow.isApproximatelyZero())); |
| m_knownToHaveNoOverflowAndNoFallbackFonts = |
| fallbackFonts.isEmpty() && glyphOverflow.isApproximatelyZero(); |
| |
| clearPreferredLogicalWidthsDirty(); |
| } |
| |
| bool LayoutText::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 LayoutText::isRenderedCharacter(int offsetInNode) const { |
| for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) { |
| if (offsetInNode < static_cast<int>(box->start()) && |
| !containsReversedText()) { |
| // The offset we're looking for is before this node this means the offset |
| // must be in content that is not laid out. Return false. |
| return false; |
| } |
| if (offsetInNode >= static_cast<int>(box->start()) && |
| offsetInNode < static_cast<int>(box->start() + box->len())) |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool LayoutText::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] == spaceCharacter || |
| text[currPos] == tabulationCharacter); |
| currPos++) { |
| } |
| return currPos >= (from + len); |
| } |
| |
| FloatPoint LayoutText::firstRunOrigin() const { |
| return IntPoint(firstRunX(), firstRunY()); |
| } |
| |
| float LayoutText::firstRunX() const { |
| return m_firstTextBox ? m_firstTextBox->x().toFloat() : 0; |
| } |
| |
| float LayoutText::firstRunY() const { |
| return m_firstTextBox ? m_firstTextBox->y().toFloat() : 0; |
| } |
| |
| void LayoutText::setSelectionState(SelectionState state) { |
| LayoutObject::setSelectionState(state); |
| |
| if (canUpdateSelectionOnRootLineBoxes()) { |
| if (state == SelectionStart || state == SelectionEnd || |
| state == SelectionBoth) { |
| int startPos, endPos; |
| selectionStartEnd(startPos, endPos); |
| if (getSelectionState() == SelectionStart) { |
| endPos = textLength(); |
| |
| // to handle selection from end of text to end of line |
| if (startPos && startPos == endPos) |
| startPos = endPos - 1; |
| } else if (getSelectionState() == 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 LayoutText::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 = nullptr; |
| RootInlineBox* lastRootBox = nullptr; |
| |
| 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().isEqual(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(std::move(text), force || dirtiedLines); |
| } |
| |
| void LayoutText::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 toLayoutText(o)->text().isEmpty(); |
| } |
| |
| UChar LayoutText::previousCharacter() const { |
| // find previous text layoutObject if one exists |
| const LayoutObject* previousText = previousInPreOrder(); |
| for (; previousText; previousText = previousText->previousInPreOrder()) { |
| if (!isInlineFlowOrEmptyText(previousText)) |
| break; |
| } |
| UChar prev = spaceCharacter; |
| if (previousText && previousText->isText()) { |
| if (StringImpl* previousString = toLayoutText(previousText)->text().impl()) |
| prev = (*previousString)[previousString->length() - 1]; |
| } |
| return prev; |
| } |
| |
| void LayoutText::addLayerHitTestRects(LayerHitTestRects&, |
| const PaintLayer* currentLayer, |
| const LayoutPoint& layerOffset, |
| const LayoutRect& containerRect) const { |
| // Text nodes aren't event targets, so don't descend any further. |
| } |
| |
| void applyTextTransform(const ComputedStyle* style, |
| String& text, |
| UChar previousCharacter) { |
| if (!style) |
| return; |
| |
| switch (style->textTransform()) { |
| case ETextTransform::None: |
| break; |
| case ETextTransform::Capitalize: |
| makeCapitalized(&text, previousCharacter); |
| break; |
| case ETextTransform::Uppercase: |
| text = text.upper(style->locale()); |
| break; |
| case ETextTransform::Lowercase: |
| text = text.lower(style->locale()); |
| break; |
| } |
| } |
| |
| void LayoutText::setTextInternal(PassRefPtr<StringImpl> text) { |
| ASSERT(text); |
| m_text = std::move(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(whiteBulletCharacter); |
| break; |
| case TSDISC: |
| secureText(bulletCharacter); |
| break; |
| case TSSQUARE: |
| secureText(blackSquareCharacter); |
| } |
| } |
| |
| ASSERT(m_text); |
| ASSERT(!isBR() || (textLength() == 1 && m_text[0] == newlineCharacter)); |
| } |
| |
| void LayoutText::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 LayoutText::setText(PassRefPtr<StringImpl> text, bool force) { |
| ASSERT(text); |
| |
| if (!force && equal(m_text.impl(), text.get())) |
| return; |
| |
| setTextInternal(std::move(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 |
| // LayoutText has parent. |
| if (parent()) |
| setNeedsLayoutAndPrefWidthsRecalcAndFullPaintInvalidation( |
| LayoutInvalidationReason::TextChanged); |
| m_knownToHaveNoOverflowAndNoFallbackFonts = false; |
| |
| if (AXObjectCache* cache = document().existingAXObjectCache()) |
| cache->textChanged(this); |
| } |
| |
| void LayoutText::dirtyOrDeleteLineBoxesIfNeeded(bool fullLayout) { |
| if (fullLayout) |
| deleteTextBoxes(); |
| else if (!m_linesDirty) |
| dirtyLineBoxes(); |
| m_linesDirty = false; |
| } |
| |
| void LayoutText::dirtyLineBoxes() { |
| for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) |
| box->dirtyLineBoxes(); |
| m_linesDirty = false; |
| } |
| |
| InlineTextBox* LayoutText::createTextBox(int start, unsigned short length) { |
| return new InlineTextBox(LineLayoutItem(this), start, length); |
| } |
| |
| InlineTextBox* LayoutText::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 LayoutText::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 LayoutText::width(unsigned from, |
| unsigned len, |
| LayoutUnit xPos, |
| TextDirection textDirection, |
| bool firstLine, |
| HashSet<const SimpleFontData*>* fallbackFonts, |
| FloatRect* glyphBounds) const { |
| if (from >= textLength()) |
| return 0; |
| |
| if (len > textLength() || from + len > textLength()) |
| len = textLength() - from; |
| |
| return width(from, len, style(firstLine)->font(), xPos, textDirection, |
| fallbackFonts, glyphBounds); |
| } |
| |
| float LayoutText::width(unsigned from, |
| unsigned len, |
| const Font& f, |
| LayoutUnit xPos, |
| TextDirection textDirection, |
| HashSet<const SimpleFontData*>* fallbackFonts, |
| FloatRect* glyphBounds) const { |
| ASSERT(from + len <= textLength()); |
| if (!textLength()) |
| return 0; |
| |
| const SimpleFontData* fontData = f.primaryFont(); |
| DCHECK(fontData); |
| if (!fontData) |
| return 0; |
| |
| float w; |
| if (&f == &style()->font()) { |
| if (!style()->preserveNewline() && !from && len == textLength()) { |
| if (fallbackFonts) { |
| ASSERT(glyphBounds); |
| if (preferredLogicalWidthsDirty() || |
| !m_knownToHaveNoOverflowAndNoFallbackFonts) |
| const_cast<LayoutText*>(this)->computePreferredLogicalWidths( |
| 0, *fallbackFonts, *glyphBounds); |
| else |
| *glyphBounds = |
| FloatRect(0, -fontData->getFontMetrics().floatAscent(), |
| m_maxWidth, fontData->getFontMetrics().floatHeight()); |
| w = m_maxWidth; |
| } else { |
| w = maxLogicalWidth(); |
| } |
| } else { |
| w = widthFromFont(f, from, len, xPos.toFloat(), 0, textDirection, |
| fallbackFonts, glyphBounds); |
| } |
| } else { |
| TextRun run = |
| constructTextRun(f, this, from, len, styleRef(), textDirection); |
| run.setCharactersLength(textLength() - from); |
| ASSERT(run.charactersLength() >= run.length()); |
| |
| run.setTabSize(!style()->collapseWhiteSpace(), style()->getTabSize()); |
| run.setXPos(xPos.toFloat()); |
| w = f.width(run, fallbackFonts, glyphBounds); |
| } |
| |
| return w; |
| } |
| |
| LayoutRect LayoutText::linesBoundingBox() const { |
| LayoutRect 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().toFloat(); |
| if (curr == firstTextBox() || curr->logicalRight() > logicalRightSide) |
| logicalRightSide = curr->logicalRight().toFloat(); |
| } |
| |
| 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 = enclosingLayoutRect(FloatRect(x, y, width, height)); |
| } |
| |
| return result; |
| } |
| |
| LayoutRect LayoutText::visualOverflowRect() 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 LayoutText::localVisualRect() const { |
| if (style()->visibility() != EVisibility::Visible) |
| return LayoutRect(); |
| |
| return unionRect(visualOverflowRect(), localSelectionRect()); |
| } |
| |
| LayoutRect LayoutText::localSelectionRect() const { |
| ASSERT(!needsLayout()); |
| |
| if (getSelectionState() == 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 (getSelectionState() == SelectionInside) { |
| // We are fully selected. |
| startPos = 0; |
| endPos = textLength(); |
| } else { |
| selectionStartEnd(startPos, endPos); |
| if (getSelectionState() == SelectionStart) |
| endPos = textLength(); |
| else if (getSelectionState() == 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))); |
| } |
| |
| return rect; |
| } |
| |
| int LayoutText::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 LayoutText::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 LayoutText::resolvedTextLength() const { |
| int len = 0; |
| for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) |
| len += box->len(); |
| return len; |
| } |
| |
| #if ENABLE(ASSERT) |
| |
| void LayoutText::checkConsistency() const { |
| #ifdef CHECK_CONSISTENCY |
| const InlineTextBox* prev = nullptr; |
| for (const InlineTextBox* child = m_firstTextBox; child; |
| child = child->nextTextBox()) { |
| ASSERT(child->getLineLayoutItem().isEqual(this)); |
| ASSERT(child->prevTextBox() == prev); |
| prev = child; |
| } |
| ASSERT(prev == m_lastTextBox); |
| #endif |
| } |
| |
| #endif |
| |
| void LayoutText::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> LayoutText::firstAbstractInlineTextBox() { |
| return AbstractInlineTextBox::getOrCreate(LineLayoutText(this), |
| m_firstTextBox); |
| } |
| |
| void LayoutText::invalidateDisplayItemClients( |
| PaintInvalidationReason invalidationReason) const { |
| ObjectPaintInvalidator paintInvalidator(*this); |
| paintInvalidator.invalidateDisplayItemClient(*this, invalidationReason); |
| |
| for (InlineTextBox* box = firstTextBox(); box; box = box->nextTextBox()) { |
| paintInvalidator.invalidateDisplayItemClient(*box, invalidationReason); |
| if (box->truncation() != cNoTruncation) { |
| if (EllipsisBox* ellipsisBox = box->root().ellipsisBox()) |
| paintInvalidator.invalidateDisplayItemClient(*ellipsisBox, |
| invalidationReason); |
| } |
| } |
| } |
| |
| // TODO(lunalu): Would be better to dump the bounding box x and y rather than |
| // the first run's x and y, but that would involve updating many test results. |
| LayoutRect LayoutText::debugRect() const { |
| IntRect linesBox = enclosingIntRect(linesBoundingBox()); |
| LayoutRect rect = LayoutRect( |
| IntRect(firstRunX(), firstRunY(), linesBox.width(), linesBox.height())); |
| LayoutBlock* block = containingBlock(); |
| if (block && hasTextBoxes()) |
| block->adjustChildDebugRect(rect); |
| |
| return rect; |
| } |
| |
| } // namespace blink |
