src/third_party/WebKit/Source/core/paint/DetailsMarkerPainter.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "core/paint/DetailsMarkerPainter.h"
   7
   8 #include "core/paint/BlockPainter.h"
   9 #include "core/rendering/PaintInfo.h"
  10 #include "core/rendering/RenderDetailsMarker.h"
  11 #include "platform/geometry/LayoutPoint.h"
  12 #include "platform/graphics/Path.h"
  13
  14 namespace blink {
  15
  16 void DetailsMarkerPainter::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset)
  17 {
  18     if (paintInfo.phase != PaintPhaseForeground || m_renderDetailsMarker.style()->visibility() != VISIBLE) {
  19         BlockPainter(m_renderDetailsMarker).paint(paintInfo, paintOffset);
  20         return;
  21     }
  22
  23     LayoutPoint boxOrigin(paintOffset + m_renderDetailsMarker.location());
  24     LayoutRect overflowRect(m_renderDetailsMarker.visualOverflowRect());
  25     overflowRect.moveBy(boxOrigin);
  26
  27     if (!paintInfo.rect.intersects(pixelSnappedIntRect(overflowRect)))
  28         return;
  29
  30     const Color color(m_renderDetailsMarker.resolveColor(CSSPropertyColor));
  31     paintInfo.context->setStrokeColor(color);
  32     paintInfo.context->setStrokeStyle(SolidStroke);
  33     paintInfo.context->setStrokeThickness(1.0f);
  34     paintInfo.context->setFillColor(color);
  35
  36     boxOrigin.move(m_renderDetailsMarker.borderLeft() + m_renderDetailsMarker.paddingLeft(), m_renderDetailsMarker.borderTop() + m_renderDetailsMarker.paddingTop());
  37     paintInfo.context->fillPath(getPath(boxOrigin));
  38 }
  39
  40 static Path createPath(const FloatPoint* path)
  41 {
  42     Path result;
  43     result.moveTo(FloatPoint(path[0].x(), path[0].y()));
  44     for (int i = 1; i < 4; ++i)
  45         result.addLineTo(FloatPoint(path[i].x(), path[i].y()));
  46     return result;
  47 }
  48
  49 static Path createDownArrowPath()
  50 {
  51     FloatPoint points[4] = { FloatPoint(0.0f, 0.07f), FloatPoint(0.5f, 0.93f), FloatPoint(1.0f, 0.07f), FloatPoint(0.0f, 0.07f) };
  52     return createPath(points);
  53 }
  54
  55 static Path createUpArrowPath()
  56 {
  57     FloatPoint points[4] = { FloatPoint(0.0f, 0.93f), FloatPoint(0.5f, 0.07f), FloatPoint(1.0f, 0.93f), FloatPoint(0.0f, 0.93f) };
  58     return createPath(points);
  59 }
  60
  61 static Path createLeftArrowPath()
  62 {
  63     FloatPoint points[4] = { FloatPoint(1.0f, 0.0f), FloatPoint(0.14f, 0.5f), FloatPoint(1.0f, 1.0f), FloatPoint(1.0f, 0.0f) };
  64     return createPath(points);
  65 }
  66
  67 static Path createRightArrowPath()
  68 {
  69     FloatPoint points[4] = { FloatPoint(0.0f, 0.0f), FloatPoint(0.86f, 0.5f), FloatPoint(0.0f, 1.0f), FloatPoint(0.0f, 0.0f) };
  70     return createPath(points);
  71 }
  72
  73 Path DetailsMarkerPainter::getCanonicalPath() const
  74 {
  75     switch (m_renderDetailsMarker.orientation()) {
  76     case RenderDetailsMarker::Left: return createLeftArrowPath();
  77     case RenderDetailsMarker::Right: return createRightArrowPath();
  78     case RenderDetailsMarker::Up: return createUpArrowPath();
  79     case RenderDetailsMarker::Down: return createDownArrowPath();
  80     }
  81
  82     return Path();
  83 }
  84
  85 Path DetailsMarkerPainter::getPath(const LayoutPoint& origin) const
  86 {
  87     Path result = getCanonicalPath();
  88     result.transform(AffineTransform().scale(m_renderDetailsMarker.contentWidth().toFloat(), m_renderDetailsMarker.contentHeight().toFloat()));
  89     result.translate(FloatSize(origin.x().toFloat(), origin.y().toFloat()));
  90     return result;
  91 }
  92
  93 } // namespace paint