Move TextPainter to core/paint/

Source/core/rendering/TextPainter.cpp

Index: Source/core/rendering/TextPainter.cpp
diff --git a/Source/core/rendering/TextPainter.cpp b/Source/core/rendering/TextPainter.cpp
deleted file mode 100644
index b2c2ac7e0ca425744c5d47d9de0a6ace55d90947..0000000000000000000000000000000000000000
--- a/Source/core/rendering/TextPainter.cpp
+++ /dev/null
@@ -1,218 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "config.h"
-#include "core/rendering/TextPainter.h"
-
-#include "core/CSSPropertyNames.h"
-#include "core/frame/Settings.h"
-#include "core/rendering/InlineTextBox.h"
-#include "core/rendering/RenderCombineText.h"
-#include "core/rendering/RenderObject.h"
-#include "core/rendering/style/RenderStyle.h"
-#include "core/rendering/style/ShadowList.h"
-#include "platform/fonts/Font.h"
-#include "platform/graphics/GraphicsContext.h"
-#include "platform/graphics/GraphicsContextStateSaver.h"
-#include "platform/text/TextRun.h"
-#include "wtf/Assertions.h"
-#include "wtf/unicode/CharacterNames.h"
-
-namespace blink {
-
-TextPainter::TextPainter(GraphicsContext* context, const Font& font, const TextRun& run, const FloatPoint& textOrigin, const FloatRect& textBounds, bool horizontal)
-    : m_graphicsContext(context)
-    , m_font(font)
-    , m_run(run)
-    , m_textOrigin(textOrigin)
-    , m_textBounds(textBounds)
-    , m_horizontal(horizontal)
-    , m_emphasisMarkOffset(0)
-    , m_combinedText(0)
-{
-}
-
-TextPainter::~TextPainter()
-{
-}
-
-void TextPainter::setEmphasisMark(const AtomicString& emphasisMark, TextEmphasisPosition position)
-{
-    m_emphasisMark = emphasisMark;
-
-    if (emphasisMark.isNull()) {
-        m_emphasisMarkOffset = 0;
-    } else if (position == TextEmphasisPositionOver) {
-        m_emphasisMarkOffset = -m_font.fontMetrics().ascent() - m_font.emphasisMarkDescent(emphasisMark);
-    } else {
-        ASSERT(position == TextEmphasisPositionUnder);
-        m_emphasisMarkOffset = m_font.fontMetrics().descent() + m_font.emphasisMarkAscent(emphasisMark);
-    }
-}
-
-void TextPainter::paint(int startOffset, int endOffset, int length, const Style& textStyle, TextBlobPtr* cachedTextBlob)
-{
-    GraphicsContextStateSaver stateSaver(*m_graphicsContext, false);
-    updateGraphicsContext(textStyle, stateSaver);
-    paintInternal<PaintText>(startOffset, endOffset, length, cachedTextBlob);
-
-    if (!m_emphasisMark.isEmpty()) {
-        if (textStyle.emphasisMarkColor != textStyle.fillColor)
-            m_graphicsContext->setFillColor(textStyle.emphasisMarkColor);
-
-        if (m_combinedText)
-            paintEmphasisMarkForCombinedText();
-        else
-            paintInternal<PaintEmphasisMark>(startOffset, endOffset, length);
-    }
-}
-
-// static
-void TextPainter::updateGraphicsContext(GraphicsContext* context, const Style& textStyle, bool horizontal, GraphicsContextStateSaver& stateSaver)
-{
-    TextDrawingModeFlags mode = context->textDrawingMode();
-    if (textStyle.strokeWidth > 0) {
-        TextDrawingModeFlags newMode = mode | TextModeStroke;
-        if (mode != newMode) {
-            if (!stateSaver.saved())
-                stateSaver.save();
-            context->setTextDrawingMode(newMode);
-            mode = newMode;
-        }
-    }
-
-    if (mode & TextModeFill && textStyle.fillColor != context->fillColor())
-        context->setFillColor(textStyle.fillColor);
-
-    if (mode & TextModeStroke) {
-        if (textStyle.strokeColor != context->strokeColor())
-            context->setStrokeColor(textStyle.strokeColor);
-        if (textStyle.strokeWidth != context->strokeThickness())
-            context->setStrokeThickness(textStyle.strokeWidth);
-    }
-
-    // Text shadows are disabled when printing. http://crbug.com/258321
-    if (textStyle.shadow && !context->printing()) {
-        if (!stateSaver.saved())
-            stateSaver.save();
-        context->setDrawLooper(textStyle.shadow->createDrawLooper(DrawLooperBuilder::ShadowIgnoresAlpha, horizontal));
-    }
-}
-
-static Color textColorForWhiteBackground(Color textColor)
-{
-    int distanceFromWhite = differenceSquared(textColor, Color::white);
-    // semi-arbitrarily chose 65025 (255^2) value here after a few tests;
-    return distanceFromWhite > 65025 ? textColor : textColor.dark();
-}
-
-// static
-TextPainter::Style TextPainter::textPaintingStyle(RenderObject& renderer, RenderStyle* style, bool forceBlackText, bool isPrinting)
-{
-    TextPainter::Style textStyle;
-
-    if (forceBlackText) {
-        textStyle.fillColor = Color::black;
-        textStyle.strokeColor = Color::black;
-        textStyle.emphasisMarkColor = Color::black;
-        textStyle.strokeWidth = style->textStrokeWidth();
-        textStyle.shadow = 0;
-    } else {
-        textStyle.fillColor = renderer.resolveColor(style, CSSPropertyWebkitTextFillColor);
-        textStyle.strokeColor = renderer.resolveColor(style, CSSPropertyWebkitTextStrokeColor);
-        textStyle.emphasisMarkColor = renderer.resolveColor(style, CSSPropertyWebkitTextEmphasisColor);
-        textStyle.strokeWidth = style->textStrokeWidth();
-        textStyle.shadow = style->textShadow();
-
-        // Adjust text color when printing with a white background.
-        bool forceBackgroundToWhite = false;
-        if (isPrinting) {
-            if (style->printColorAdjust() == PrintColorAdjustEconomy)
-                forceBackgroundToWhite = true;
-            if (renderer.document().settings() && renderer.document().settings()->shouldPrintBackgrounds())
-                forceBackgroundToWhite = false;
-        }
-        if (forceBackgroundToWhite) {
-            textStyle.fillColor = textColorForWhiteBackground(textStyle.fillColor);
-            textStyle.strokeColor = textColorForWhiteBackground(textStyle.strokeColor);
-            textStyle.emphasisMarkColor = textColorForWhiteBackground(textStyle.emphasisMarkColor);
-        }
-
-        // Text shadows are disabled when printing. http://crbug.com/258321
-        if (isPrinting)
-            textStyle.shadow = 0;
-    }
-
-    return textStyle;
-}
-
-TextPainter::Style TextPainter::selectionPaintingStyle(RenderObject& renderer, bool haveSelection, bool forceBlackText, bool isPrinting, const TextPainter::Style& textStyle)
-{
-    TextPainter::Style selectionStyle = textStyle;
-
-    if (haveSelection) {
-        if (!forceBlackText) {
-            selectionStyle.fillColor = renderer.selectionForegroundColor();
-            selectionStyle.emphasisMarkColor = renderer.selectionEmphasisMarkColor();
-        }
-
-        if (RenderStyle* pseudoStyle = renderer.getCachedPseudoStyle(SELECTION)) {
-            selectionStyle.strokeColor = forceBlackText ? Color::black : renderer.resolveColor(pseudoStyle, CSSPropertyWebkitTextStrokeColor);
-            selectionStyle.strokeWidth = pseudoStyle->textStrokeWidth();
-            selectionStyle.shadow = forceBlackText ? 0 : pseudoStyle->textShadow();
-        }
-
-        // Text shadows are disabled when printing. http://crbug.com/258321
-        if (isPrinting)
-            selectionStyle.shadow = 0;
-    }
-
-    return selectionStyle;
-}
-
-template <TextPainter::PaintInternalStep step>
-void TextPainter::paintInternalRun(TextRunPaintInfo& textRunPaintInfo, int from, int to)
-{
-    textRunPaintInfo.from = from;
-    textRunPaintInfo.to = to;
-
-    if (step == PaintEmphasisMark) {
-        m_graphicsContext->drawEmphasisMarks(m_font, textRunPaintInfo, m_emphasisMark,
-            m_textOrigin + IntSize(0, m_emphasisMarkOffset));
-    } else {
-        ASSERT(step == PaintText);
-        m_graphicsContext->drawText(m_font, textRunPaintInfo, m_textOrigin);
-    }
-}
-
-template <TextPainter::PaintInternalStep Step>
-void TextPainter::paintInternal(int startOffset, int endOffset, int truncationPoint, TextBlobPtr* cachedTextBlob)
-{
-    TextRunPaintInfo textRunPaintInfo(m_run);
-    textRunPaintInfo.bounds = m_textBounds;
-    if (startOffset <= endOffset) {
-        // FIXME: We should be able to use cachedTextBlob in more cases.
-        textRunPaintInfo.cachedTextBlob = cachedTextBlob;
-        paintInternalRun<Step>(textRunPaintInfo, startOffset, endOffset);
-    } else {
-        if (endOffset > 0)
-            paintInternalRun<Step>(textRunPaintInfo, 0, endOffset);
-        if (startOffset < truncationPoint)
-            paintInternalRun<Step>(textRunPaintInfo, startOffset, truncationPoint);
-    }
-}
-
-void TextPainter::paintEmphasisMarkForCombinedText()
-{
-    ASSERT(m_combinedText);
-    DEFINE_STATIC_LOCAL(TextRun, placeholderTextRun, (&ideographicFullStop, 1));
-    FloatPoint emphasisMarkTextOrigin(m_textBounds.x(), m_textBounds.y() + m_font.fontMetrics().ascent() + m_emphasisMarkOffset);
-    TextRunPaintInfo textRunPaintInfo(placeholderTextRun);
-    textRunPaintInfo.bounds = m_textBounds;
-    m_graphicsContext->concatCTM(InlineTextBox::rotation(m_textBounds, InlineTextBox::Clockwise));
-    m_graphicsContext->drawEmphasisMarks(m_combinedText->originalFont(), textRunPaintInfo, m_emphasisMark, emphasisMarkTextOrigin);
-    m_graphicsContext->concatCTM(InlineTextBox::rotation(m_textBounds, InlineTextBox::Counterclockwise));
-}
-
-} // namespace blink