Skip to content
Permalink
Browse files
RenderText should cache RenderStyle in locals more. 
<https://webkit.org/b/122823>

Reviewed by Antti Koivisto.

Now that fetching the RenderStyle has to go through the parent,
we should avoid unnecessary loads by caching style() in a local.


Canonical link: https://commits.webkit.org/140917@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@157448 268f45cc-cd09-0410-ab3c-d52691b4dbfc
  • Loading branch information
Andreas Kling committed Oct 15, 2013
1 parent 8aa4225 commit 80f1379ca5926a080b49c302f29f560a73fc4ad2
Showing with 43 additions and 29 deletions.
  1. +10 −0 Source/WebCore/ChangeLog
  2. +32 −28 Source/WebCore/rendering/RenderText.cpp
  3. +1 −1 Source/WebCore/rendering/RenderText.h
10 Source/WebCore/ChangeLog
View file
@@ -1,3 +1,13 @@
2013-10-15 Andreas Kling <akling@apple.com>

RenderText should cache RenderStyle in locals more.
<https://webkit.org/b/122823>

Reviewed by Antti Koivisto.

Now that fetching the RenderStyle has to go through the parent,
we should avoid unnecessary loads by caching style() in a local.

2013-10-15 Csaba Osztrogonác <ossy@webkit.org>

Move PlatformCertificateInfo to WebCore and make the ResourceResponse primitives work in terms of that platform agnostic object
60 Source/WebCore/rendering/RenderText.cpp
View file
@@ -210,8 +210,9 @@ bool RenderText::isTextFragment() const

bool RenderText::computeUseBackslashAsYenSymbol() const
{
const FontDescription& fontDescription = style()->font().fontDescription();
if (style()->font().useBackslashAsYenSymbol())
const RenderStyle& style = *this->style();
const FontDescription& fontDescription = style.font().fontDescription();
if (style.font().useBackslashAsYenSymbol())
return true;
if (fontDescription.isSpecifiedFont())
return false;
@@ -329,9 +330,9 @@ LayoutRect RenderText::localCaretRect(InlineBox* inlineBox, int caretOffset, Lay
return box->root().computeCaretRect(left, caretWidth, extraWidthToEndOfLine);
}

ALWAYS_INLINE float RenderText::widthFromCache(const Font& f, int start, int len, float xPos, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow* glyphOverflow) const
ALWAYS_INLINE float RenderText::widthFromCache(const Font& f, int start, int len, float xPos, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow* glyphOverflow, const RenderStyle& style) const
{
if (style()->hasTextCombine() && isCombineText()) {
if (style.hasTextCombine() && isCombineText()) {
const RenderCombineText& combineText = toRenderCombineText(*this);
if (combineText.isCombined())
return combineText.combinedTextWidth(f);
@@ -350,11 +351,11 @@ ALWAYS_INLINE float RenderText::widthFromCache(const Font& f, int start, int len
w += monospaceCharacterWidth;
isSpace = true;
} else if (c == '\t') {
if (style()->collapseWhiteSpace()) {
if (style.collapseWhiteSpace()) {
w += monospaceCharacterWidth;
isSpace = true;
} else {
w += f.tabWidth(style()->tabSize(), xPos + w);
w += f.tabWidth(style.tabSize(), xPos + w);
isSpace = false;
}
} else
@@ -369,12 +370,12 @@ ALWAYS_INLINE float RenderText::widthFromCache(const Font& f, int start, int len
return w;
}

TextRun run = RenderBlock::constructTextRun(const_cast<RenderText*>(this), f, this, start, len, *style());
TextRun run = RenderBlock::constructTextRun(const_cast<RenderText*>(this), f, this, start, len, style);
run.setCharactersLength(textLength() - start);
ASSERT(run.charactersLength() >= run.length());

run.setCharacterScanForCodePath(!canUseSimpleFontCodePath());
run.setTabSize(!style()->collapseWhiteSpace(), style()->tabSize());
run.setTabSize(!style.collapseWhiteSpace(), style.tabSize());
run.setXPos(xPos);
return f.width(run, fallbackFonts, glyphOverflow);
}
@@ -386,7 +387,8 @@ void RenderText::trimmedPrefWidths(float leadWidth,
float& beginMaxW, float& endMaxW,
float& minW, float& maxW, bool& stripFrontSpaces)
{
bool collapseWhiteSpace = style()->collapseWhiteSpace();
const RenderStyle& style = *this->style();
bool collapseWhiteSpace = style.collapseWhiteSpace();
if (!collapseWhiteSpace)
stripFrontSpaces = false;

@@ -420,24 +422,24 @@ void RenderText::trimmedPrefWidths(float leadWidth,

ASSERT(m_text);
StringImpl& text = *m_text.impl();
if (text[0] == ' ' || (text[0] == '\n' && !style()->preserveNewline()) || text[0] == '\t') {
const Font& font = style()->font(); // FIXME: This ignores first-line.
if (text[0] == ' ' || (text[0] == '\n' && !style.preserveNewline()) || text[0] == '\t') {
const Font& font = style.font(); // FIXME: This ignores first-line.
if (stripFrontSpaces) {
const UChar space = ' ';
float spaceWidth = font.width(RenderBlock::constructTextRun(this, font, &space, 1, *style()));
float spaceWidth = font.width(RenderBlock::constructTextRun(this, font, &space, 1, style));
maxW -= spaceWidth;
} else
maxW += font.wordSpacing();
}

stripFrontSpaces = collapseWhiteSpace && m_hasEndWS;

if (!style()->autoWrap() || minW > maxW)
if (!style.autoWrap() || minW > maxW)
minW = maxW;

// Compute our max widths by scanning the string for newlines.
if (hasBreak) {
const Font& f = style()->font(); // FIXME: This ignores first-line.
const Font& f = style.font(); // FIXME: This ignores first-line.
bool firstLine = true;
beginMaxW = maxW;
endMaxW = maxW;
@@ -447,7 +449,7 @@ void RenderText::trimmedPrefWidths(float leadWidth,
linelen++;

if (linelen) {
endMaxW = widthFromCache(f, i, linelen, leadWidth + endMaxW, 0, 0);
endMaxW = widthFromCache(f, i, linelen, leadWidth + endMaxW, 0, 0, style);
if (firstLine) {
firstLine = false;
leadWidth = 0;
@@ -640,7 +642,7 @@ void RenderText::computePreferredLogicalWidths(float leadWidth, HashSet<const Si
lastWordBoundary++;
continue;
} else if (c == softHyphen && style.hyphens() != HyphensNone) {
currMaxWidth += widthFromCache(f, lastWordBoundary, i - lastWordBoundary, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow);
currMaxWidth += widthFromCache(f, lastWordBoundary, i - lastWordBoundary, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow, style);
if (firstGlyphLeftOverflow < 0)
firstGlyphLeftOverflow = glyphOverflow.left;
lastWordBoundary = i + 1;
@@ -668,9 +670,9 @@ void RenderText::computePreferredLogicalWidths(float leadWidth, HashSet<const Si
bool isSpace = (j < len) && isSpaceAccordingToStyle(c, style);
float w;
if (wordTrailingSpaceWidth && isSpace)
w = widthFromCache(f, i, wordLen + 1, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow) - wordTrailingSpaceWidth;
w = widthFromCache(f, i, wordLen + 1, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow, style) - wordTrailingSpaceWidth;
else {
w = widthFromCache(f, i, wordLen, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow);
w = widthFromCache(f, i, wordLen, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow, style);
if (c == softHyphen && style.hyphens() != HyphensNone)
currMinWidth += hyphenWidth(this, f);
}
@@ -682,9 +684,9 @@ void RenderText::computePreferredLogicalWidths(float leadWidth, HashSet<const Si
if (suffixStart) {
float suffixWidth;
if (wordTrailingSpaceWidth && isSpace)
suffixWidth = widthFromCache(f, i + suffixStart, wordLen - suffixStart + 1, leadWidth + currMaxWidth, 0, 0) - wordTrailingSpaceWidth;
suffixWidth = widthFromCache(f, i + suffixStart, wordLen - suffixStart + 1, leadWidth + currMaxWidth, 0, 0, style) - wordTrailingSpaceWidth;
else
suffixWidth = widthFromCache(f, i + suffixStart, wordLen - suffixStart, leadWidth + currMaxWidth, 0, 0);
suffixWidth = widthFromCache(f, i + suffixStart, wordLen - suffixStart, leadWidth + currMaxWidth, 0, 0, style);

maxFragmentWidth = max(maxFragmentWidth, suffixWidth);

@@ -701,7 +703,7 @@ void RenderText::computePreferredLogicalWidths(float leadWidth, HashSet<const Si
if (lastWordBoundary == i)
currMaxWidth += w;
else
currMaxWidth += widthFromCache(f, lastWordBoundary, j - lastWordBoundary, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow);
currMaxWidth += widthFromCache(f, lastWordBoundary, j - lastWordBoundary, leadWidth + currMaxWidth, &fallbackFonts, &glyphOverflow, style);
lastWordBoundary = j;
}

@@ -790,16 +792,17 @@ void RenderText::computePreferredLogicalWidths(float leadWidth, HashSet<const Si

bool RenderText::isAllCollapsibleWhitespace() const
{
const RenderStyle& style = *this->style();
unsigned length = textLength();
if (is8Bit()) {
for (unsigned i = 0; i < length; ++i) {
if (!style()->isCollapsibleWhiteSpace(characters8()[i]))
if (!style.isCollapsibleWhiteSpace(characters8()[i]))
return false;
}
return true;
}
for (unsigned i = 0; i < length; ++i) {
if (!style()->isCollapsibleWhiteSpace(characters16()[i]))
if (!style.isCollapsibleWhiteSpace(characters16()[i]))
return false;
}
return true;
@@ -1040,9 +1043,10 @@ float RenderText::width(unsigned from, unsigned len, const Font& f, float xPos,
if (!textLength())
return 0;

const RenderStyle& style = *this->style();
float w;
if (&f == &style()->font()) {
if (!style()->preserveNewline() && !from && len == textLength() && (!glyphOverflow || !glyphOverflow->computeBounds)) {
if (&f == &style.font()) {
if (!style.preserveNewline() && !from && len == textLength() && (!glyphOverflow || !glyphOverflow->computeBounds)) {
if (fallbackFonts) {
ASSERT(glyphOverflow);
if (preferredLogicalWidthsDirty() || !m_knownToHaveNoOverflowAndNoFallbackFonts) {
@@ -1054,14 +1058,14 @@ float RenderText::width(unsigned from, unsigned len, const Font& f, float xPos,
} else
w = maxLogicalWidth();
} else
w = widthFromCache(f, from, len, xPos, fallbackFonts, glyphOverflow);
w = widthFromCache(f, from, len, xPos, fallbackFonts, glyphOverflow, style);
} else {
TextRun run = RenderBlock::constructTextRun(const_cast<RenderText*>(this), f, this, from, len, *style());
TextRun run = RenderBlock::constructTextRun(const_cast<RenderText*>(this), f, this, from, len, style);
run.setCharactersLength(textLength() - from);
ASSERT(run.charactersLength() >= run.length());

run.setCharacterScanForCodePath(!canUseSimpleFontCodePath());
run.setTabSize(!style()->collapseWhiteSpace(), style()->tabSize());
run.setTabSize(!style.collapseWhiteSpace(), style.tabSize());
run.setXPos(xPos);
w = f.width(run, fallbackFonts, glyphOverflow);
}
2 Source/WebCore/rendering/RenderText.h
View file
@@ -171,7 +171,7 @@ class RenderText : public RenderObject {
virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint&, HitTestAction) OVERRIDE FINAL { ASSERT_NOT_REACHED(); return false; }

bool containsOnlyWhitespace(unsigned from, unsigned len) const;
float widthFromCache(const Font&, int start, int len, float xPos, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow*) const;
float widthFromCache(const Font&, int start, int len, float xPos, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow*, const RenderStyle&) const;
bool isAllASCII() const { return m_isAllASCII; }
bool computeUseBackslashAsYenSymbol() const;

0 comments on commit 80f1379

Please sign in to comment.