Move test runner to a component

components/test_runner/mock_web_theme_engine.cc

+// 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 "components/test_runner/mock_web_theme_engine.h"
+
+#if !defined(OS_MACOSX)
+
+#include "base/logging.h"
+#include "skia/ext/platform_canvas.h"
+#include "third_party/WebKit/public/platform/WebRect.h"
+#include "third_party/WebKit/public/platform/WebSize.h"
+#include "third_party/skia/include/core/SkRect.h"
+
+using blink::WebCanvas;
+using blink::WebColor;
+using blink::WebRect;
+using blink::WebThemeEngine;
+
+namespace content {
+
+namespace {
+
+const SkColor edgeColor = SK_ColorBLACK;
+const SkColor readOnlyColor = SkColorSetRGB(0xe9, 0xc2, 0xa6);
+
+}  // namespace
+
+SkColor bgColors(WebThemeEngine::State state) {
+  switch (state) {
+    case WebThemeEngine::StateDisabled:
+      return SkColorSetRGB(0xc9, 0xc9, 0xc9);
+    case WebThemeEngine::StateHover:
+      return SkColorSetRGB(0x43, 0xf9, 0xff);
+    case WebThemeEngine::StateNormal:
+      return SkColorSetRGB(0x89, 0xc4, 0xff);
+    case WebThemeEngine::StatePressed:
+      return SkColorSetRGB(0xa9, 0xff, 0x12);
+    case WebThemeEngine::StateFocused:
+      return SkColorSetRGB(0x00, 0xf3, 0xac);
+    case WebThemeEngine::StateReadonly:
+      return SkColorSetRGB(0xf3, 0xe0, 0xd0);
+    default:
+      NOTREACHED();
+  }
+  return SkColorSetRGB(0x00, 0x00, 0xff);
+}
+
+blink::WebSize MockWebThemeEngine::getSize(WebThemeEngine::Part part) {
+  // FIXME: We use this constant to indicate we are being asked for the size of
+  // a part that we don't expect to be asked about. We return a garbage value
+  // rather than just asserting because this code doesn't have access to either
+  // WTF or base to raise an assertion or do any logging :(.
+  const blink::WebSize invalidPartSize = blink::WebSize(100, 100);
+
+  switch (part) {
+    case WebThemeEngine::PartScrollbarLeftArrow:
+      return blink::WebSize(17, 15);
+    case WebThemeEngine::PartScrollbarRightArrow:
+      return invalidPartSize;
+    case WebThemeEngine::PartScrollbarUpArrow:
+      return blink::WebSize(15, 17);
+    case WebThemeEngine::PartScrollbarDownArrow:
+      return invalidPartSize;
+    case WebThemeEngine::PartScrollbarHorizontalThumb:
+      return blink::WebSize(15, 15);
+    case WebThemeEngine::PartScrollbarVerticalThumb:
+      return blink::WebSize(15, 15);
+    case WebThemeEngine::PartScrollbarHorizontalTrack:
+      return blink::WebSize(0, 15);
+    case WebThemeEngine::PartScrollbarVerticalTrack:
+      return blink::WebSize(15, 0);
+    case WebThemeEngine::PartCheckbox:
+    case WebThemeEngine::PartRadio:
+      return blink::WebSize(13, 13);
+    case WebThemeEngine::PartSliderThumb:
+      return blink::WebSize(11, 21);
+    case WebThemeEngine::PartInnerSpinButton:
+      return blink::WebSize(15, 8);
+    default:
+      return invalidPartSize;
+  }
+}
+
+static SkIRect webRectToSkIRect(const WebRect& webRect) {
+  SkIRect irect;
+  irect.set(webRect.x, webRect.y, webRect.x + webRect.width - 1,
+            webRect.y + webRect.height - 1);
+  return irect;
+}
+
+static SkIRect validate(const SkIRect& rect, WebThemeEngine::Part part) {
+  switch (part) {
+    case WebThemeEngine::PartCheckbox:
+    case WebThemeEngine::PartRadio: {
+      SkIRect retval = rect;
+
+      // The maximum width and height is 13.
+      // Center the square in the passed rectangle.
+      const int maxControlSize = 13;
+      int controlSize = std::min(rect.width(), rect.height());
+      controlSize = std::min(controlSize, maxControlSize);
+
+      retval.fLeft = rect.fLeft + (rect.width() / 2) - (controlSize / 2);
+      retval.fRight = retval.fLeft + controlSize - 1;
+      retval.fTop = rect.fTop + (rect.height() / 2) - (controlSize / 2);
+      retval.fBottom = retval.fTop + controlSize - 1;
+
+      return retval;
+    }
+    default:
+      return rect;
+  }
+}
+
+void box(SkCanvas* canvas, const SkIRect& rect, SkColor fillColor) {
+  SkPaint paint;
+
+  paint.setStyle(SkPaint::kFill_Style);
+  paint.setColor(fillColor);
+  canvas->drawIRect(rect, paint);
+
+  paint.setColor(edgeColor);
+  paint.setStyle(SkPaint::kStroke_Style);
+  canvas->drawIRect(rect, paint);
+}
+
+void line(SkCanvas* canvas, int x0, int y0, int x1, int y1, SkColor color) {
+  SkPaint paint;
+  paint.setColor(color);
+  canvas->drawLine(SkIntToScalar(x0), SkIntToScalar(y0), SkIntToScalar(x1),
+                   SkIntToScalar(y1), paint);
+}
+
+void triangle(SkCanvas* canvas,
+              int x0,
+              int y0,
+              int x1,
+              int y1,
+              int x2,
+              int y2,
+              SkColor color) {
+  SkPath path;
+  SkPaint paint;
+
+  paint.setColor(color);
+  paint.setStyle(SkPaint::kFill_Style);
+  path.incReserve(4);
+  path.moveTo(SkIntToScalar(x0), SkIntToScalar(y0));
+  path.lineTo(SkIntToScalar(x1), SkIntToScalar(y1));
+  path.lineTo(SkIntToScalar(x2), SkIntToScalar(y2));
+  path.close();
+  canvas->drawPath(path, paint);
+
+  paint.setColor(edgeColor);
+  paint.setStyle(SkPaint::kStroke_Style);
+  canvas->drawPath(path, paint);
+}
+
+void roundRect(SkCanvas* canvas, SkIRect irect, SkColor color) {
+  SkRect rect;
+  SkScalar radius = SkIntToScalar(5);
+  SkPaint paint;
+
+  rect.set(irect);
+  paint.setColor(color);
+  paint.setStyle(SkPaint::kFill_Style);
+  canvas->drawRoundRect(rect, radius, radius, paint);
+
+  paint.setColor(edgeColor);
+  paint.setStyle(SkPaint::kStroke_Style);
+  canvas->drawRoundRect(rect, radius, radius, paint);
+}
+
+void oval(SkCanvas* canvas, SkIRect irect, SkColor color) {
+  SkRect rect;
+  SkPaint paint;
+
+  rect.set(irect);
+  paint.setColor(color);
+  paint.setStyle(SkPaint::kFill_Style);
+  canvas->drawOval(rect, paint);
+
+  paint.setColor(edgeColor);
+  paint.setStyle(SkPaint::kStroke_Style);
+  canvas->drawOval(rect, paint);
+}
+
+void circle(SkCanvas* canvas, SkIRect irect, SkScalar radius, SkColor color) {
+  int left = irect.fLeft;
+  int width = irect.width();
+  int height = irect.height();
+  int top = irect.fTop;
+
+  SkScalar cy = SkIntToScalar(top + height / 2);
+  SkScalar cx = SkIntToScalar(left + width / 2);
+  SkPaint paint;
+
+  paint.setColor(color);
+  paint.setStyle(SkPaint::kFill_Style);
+  canvas->drawCircle(cx, cy, radius, paint);
+
+  paint.setColor(edgeColor);
+  paint.setStyle(SkPaint::kStroke_Style);
+  canvas->drawCircle(cx, cy, radius, paint);
+}
+
+void nestedBoxes(SkCanvas* canvas,
+                 SkIRect irect,
+                 int indentLeft,
+                 int indentTop,
+                 int indentRight,
+                 int indentBottom,
+                 SkColor outerColor,
+                 SkColor innerColor) {
+  SkIRect lirect;
+  box(canvas, irect, outerColor);
+  lirect.set(irect.fLeft + indentLeft, irect.fTop + indentTop,
+             irect.fRight - indentRight, irect.fBottom - indentBottom);
+  box(canvas, lirect, innerColor);
+}
+
+void insetBox(SkCanvas* canvas,
+              SkIRect irect,
+              int indentLeft,
+              int indentTop,
+              int indentRight,
+              int indentBottom,
+              SkColor color) {
+  SkIRect lirect;
+  lirect.set(irect.fLeft + indentLeft, irect.fTop + indentTop,
+             irect.fRight - indentRight, irect.fBottom - indentBottom);
+  box(canvas, lirect, color);
+}
+
+void markState(SkCanvas* canvas, SkIRect irect, WebThemeEngine::State state) {
+  int left = irect.fLeft;
+  int right = irect.fRight;
+  int top = irect.fTop;
+  int bottom = irect.fBottom;
+
+  // The length of a triangle side for the corner marks.
+  const int triangleSize = 5;
+
+  switch (state) {
+    case WebThemeEngine::StateDisabled:
+    case WebThemeEngine::StateNormal:
+      // Don't visually mark these states (color is enough).
+      break;
+
+    case WebThemeEngine::StateReadonly: {
+      // The horizontal lines in a read only control are spaced by this amount.
+      const int readOnlyLineOffset = 5;
+
+      // Drawing lines across the control.
+      for (int i = top + readOnlyLineOffset; i < bottom;
+           i += readOnlyLineOffset)
+        line(canvas, left + 1, i, right - 1, i, readOnlyColor);
+      break;
+    }
+    case WebThemeEngine::StateHover:
+      // Draw a triangle in the upper left corner of the control. (Win's "hot")
+      triangle(canvas, left, top, left + triangleSize, top, left,
+               top + triangleSize, edgeColor);
+      break;
+
+    case WebThemeEngine::StateFocused:
+      // Draw a triangle in the bottom right corner of the control.
+      triangle(canvas, right, bottom, right - triangleSize, bottom, right,
+               bottom - triangleSize, edgeColor);
+      break;
+
+    case WebThemeEngine::StatePressed:
+      // Draw a triangle in the bottom left corner of the control.
+      triangle(canvas, left, bottom, left, bottom - triangleSize,
+               left + triangleSize, bottom, edgeColor);
+      break;
+
+    default:
+      // FIXME: Should we do something here to indicate that we got an invalid
+      // state?
+      // Unfortunately, we can't assert because we don't have access to WTF or
+      // base.
+      break;
+  }
+}
+
+void MockWebThemeEngine::paint(blink::WebCanvas* canvas,
+                               WebThemeEngine::Part part,
+                               WebThemeEngine::State state,
+                               const blink::WebRect& rect,
+                               const WebThemeEngine::ExtraParams* extraParams) {
+  SkIRect irect = webRectToSkIRect(rect);
+  SkPaint paint;
+
+  // Indent amounts for the check in a checkbox or radio button.
+  const int checkIndent = 3;
+
+  // Indent amounts for short and long sides of the scrollbar notches.
+  const int notchLongOffset = 1;
+  const int notchShortOffset = 4;
+  const int noOffset = 0;
+
+  // Indent amounts for the short and long sides of a scroll thumb box.
+  const int thumbLongIndent = 0;
+  const int thumbShortIndent = 2;
+
+  // Indents for the crosshatch on a scroll grip.
+  const int gripLongIndent = 3;
+  const int gripShortIndent = 5;
+
+  // Indents for the the slider track.
+  const int sliderIndent = 2;
+
+  int halfHeight = irect.height() / 2;
+  int halfWidth = irect.width() / 2;
+  int quarterHeight = irect.height() / 4;
+  int quarterWidth = irect.width() / 4;
+  int left = irect.fLeft;
+  int right = irect.fRight;
+  int top = irect.fTop;
+  int bottom = irect.fBottom;
+
+  switch (part) {
+    case WebThemeEngine::PartScrollbarDownArrow:
+      box(canvas, irect, bgColors(state));
+      triangle(canvas, left + quarterWidth, top + quarterHeight,
+               right - quarterWidth, top + quarterHeight, left + halfWidth,
+               bottom - quarterHeight, edgeColor);
+      markState(canvas, irect, state);
+      break;
+
+    case WebThemeEngine::PartScrollbarLeftArrow:
+      box(canvas, irect, bgColors(state));
+      triangle(canvas, right - quarterWidth, top + quarterHeight,
+               right - quarterWidth, bottom - quarterHeight,
+               left + quarterWidth, top + halfHeight, edgeColor);
+      break;
+
+    case WebThemeEngine::PartScrollbarRightArrow:
+      box(canvas, irect, bgColors(state));
+      triangle(canvas, left + quarterWidth, top + quarterHeight,
+               right - quarterWidth, top + halfHeight, left + quarterWidth,
+               bottom - quarterHeight, edgeColor);
+      break;
+
+    case WebThemeEngine::PartScrollbarUpArrow:
+      box(canvas, irect, bgColors(state));
+      triangle(canvas, left + quarterWidth, bottom - quarterHeight,
+               left + halfWidth, top + quarterHeight, right - quarterWidth,
+               bottom - quarterHeight, edgeColor);
+      markState(canvas, irect, state);
+      break;
+
+    case WebThemeEngine::PartScrollbarHorizontalThumb: {
+      // Draw a narrower box on top of the outside box.
+      nestedBoxes(canvas, irect, thumbLongIndent, thumbShortIndent,
+                  thumbLongIndent, thumbShortIndent, bgColors(state),
+                  bgColors(state));
+      // Draw a horizontal crosshatch for the grip.
+      int longOffset = halfWidth - gripLongIndent;
+      line(canvas, left + gripLongIndent, top + halfHeight,
+           right - gripLongIndent, top + halfHeight, edgeColor);
+      line(canvas, left + longOffset, top + gripShortIndent, left + longOffset,
+           bottom - gripShortIndent, edgeColor);
+      line(canvas, right - longOffset, top + gripShortIndent,
+           right - longOffset, bottom - gripShortIndent, edgeColor);
+      markState(canvas, irect, state);
+      break;
+    }
+
+    case WebThemeEngine::PartScrollbarVerticalThumb: {
+      // Draw a shorter box on top of the outside box.
+      nestedBoxes(canvas, irect, thumbShortIndent, thumbLongIndent,
+                  thumbShortIndent, thumbLongIndent, bgColors(state),
+                  bgColors(state));
+      // Draw a vertical crosshatch for the grip.
+      int longOffset = halfHeight - gripLongIndent;
+      line(canvas, left + halfWidth, top + gripLongIndent, left + halfWidth,
+           bottom - gripLongIndent, edgeColor);
+      line(canvas, left + gripShortIndent, top + longOffset,
+           right - gripShortIndent, top + longOffset, edgeColor);
+      line(canvas, left + gripShortIndent, bottom - longOffset,
+           right - gripShortIndent, bottom - longOffset, edgeColor);
+      markState(canvas, irect, state);
+      break;
+    }
+
+    case WebThemeEngine::PartScrollbarHorizontalTrack: {
+      int longOffset = halfHeight - notchLongOffset;
+      int shortOffset = irect.width() - notchShortOffset;
+      box(canvas, irect, bgColors(state));
+      // back, notch on right
+      insetBox(canvas, irect, noOffset, longOffset, shortOffset, longOffset,
+               edgeColor);
+      // forward, notch on right
+      insetBox(canvas, irect, shortOffset, longOffset, noOffset, longOffset,
+               edgeColor);
+      markState(canvas, irect, state);
+      break;
+    }
+
+    case WebThemeEngine::PartScrollbarVerticalTrack: {
+      int longOffset = halfWidth - notchLongOffset;
+      int shortOffset = irect.height() - notchShortOffset;
+      box(canvas, irect, bgColors(state));
+      // back, notch at top
+      insetBox(canvas, irect, longOffset, noOffset, longOffset, shortOffset,
+               edgeColor);
+      // forward, notch at bottom
+      insetBox(canvas, irect, longOffset, shortOffset, longOffset, noOffset,
+               edgeColor);
+      markState(canvas, irect, state);
+      break;
+    }
+
+    case WebThemeEngine::PartScrollbarCorner: {
+      SkIRect cornerRect = {rect.x, rect.y, rect.x + rect.width,
+                            rect.y + rect.height};
+      paint.setColor(SK_ColorWHITE);
+      paint.setStyle(SkPaint::kFill_Style);
+      paint.setXfermodeMode(SkXfermode::kSrc_Mode);
+      paint.setAntiAlias(true);
+      canvas->drawIRect(cornerRect, paint);
+      break;
+    }
+
+    case WebThemeEngine::PartCheckbox:
+      if (extraParams->button.indeterminate) {
+        nestedBoxes(canvas, irect, checkIndent, halfHeight, checkIndent,
+                    halfHeight, bgColors(state), edgeColor);
+      } else if (extraParams->button.checked) {
+        irect = validate(irect, part);
+        nestedBoxes(canvas, irect, checkIndent, checkIndent, checkIndent,
+                    checkIndent, bgColors(state), edgeColor);
+      } else {
+        irect = validate(irect, part);
+        box(canvas, irect, bgColors(state));
+      }
+      break;
+
+    case WebThemeEngine::PartRadio:
+      irect = validate(irect, part);
+      halfHeight = irect.height() / 2;
+      if (extraParams->button.checked) {
+        circle(canvas, irect, SkIntToScalar(halfHeight), bgColors(state));
+        circle(canvas, irect, SkIntToScalar(halfHeight - checkIndent),
+               edgeColor);
+      } else {
+        circle(canvas, irect, SkIntToScalar(halfHeight), bgColors(state));
+      }
+      break;
+
+    case WebThemeEngine::PartButton:
+      roundRect(canvas, irect, bgColors(state));
+      markState(canvas, irect, state);
+      break;
+
+    case WebThemeEngine::PartTextField:
+      paint.setColor(extraParams->textField.backgroundColor);
+      paint.setStyle(SkPaint::kFill_Style);
+      canvas->drawIRect(irect, paint);
+
+      paint.setColor(edgeColor);
+      paint.setStyle(SkPaint::kStroke_Style);
+      canvas->drawIRect(irect, paint);
+
+      markState(canvas, irect, state);
+      break;
+
+    case WebThemeEngine::PartMenuList:
+      if (extraParams->menuList.fillContentArea) {
+        box(canvas, irect, extraParams->menuList.backgroundColor);
+      } else {
+        SkPaint paint;
+        paint.setColor(edgeColor);
+        paint.setStyle(SkPaint::kStroke_Style);
+        canvas->drawIRect(irect, paint);
+      }
+
+      // clip the drop-down arrow to be inside the select box
+      if (extraParams->menuList.arrowX - 4 > irect.fLeft)
+        irect.fLeft = extraParams->menuList.arrowX - 4;
+      if (extraParams->menuList.arrowX + 12 < irect.fRight)
+        irect.fRight = extraParams->menuList.arrowX + 12;
+
+      irect.fTop = extraParams->menuList.arrowY -
+                   (extraParams->menuList.arrowHeight) / 2;
+      irect.fBottom = extraParams->menuList.arrowY +
+                      (extraParams->menuList.arrowHeight - 1) / 2;
+      halfWidth = irect.width() / 2;
+      quarterWidth = irect.width() / 4;
+
+      if (state == WebThemeEngine::StateFocused)  // FIXME: draw differenty?
+        state = WebThemeEngine::StateNormal;
+      box(canvas, irect, bgColors(state));
+      triangle(canvas, irect.fLeft + quarterWidth, irect.fTop,
+               irect.fRight - quarterWidth, irect.fTop, irect.fLeft + halfWidth,
+               irect.fBottom, edgeColor);
+
+      break;
+
+    case WebThemeEngine::PartSliderTrack: {
+      SkIRect lirect = irect;
+
+      // Draw a narrow rect for the track plus box hatches on the ends.
+      if (state == WebThemeEngine::StateFocused)  // FIXME: draw differently?
+        state = WebThemeEngine::StateNormal;
+      if (extraParams->slider.vertical) {
+        lirect.inset(halfWidth - sliderIndent, noOffset);
+        box(canvas, lirect, bgColors(state));
+        line(canvas, left, top, right, top, edgeColor);
+        line(canvas, left, bottom, right, bottom, edgeColor);
+      } else {
+        lirect.inset(noOffset, halfHeight - sliderIndent);
+        box(canvas, lirect, bgColors(state));
+        line(canvas, left, top, left, bottom, edgeColor);
+        line(canvas, right, top, right, bottom, edgeColor);
+      }
+      break;
+    }
+
+    case WebThemeEngine::PartSliderThumb:
+      if (state == WebThemeEngine::StateFocused)  // FIXME: draw differently?
+        state = WebThemeEngine::StateNormal;
+      oval(canvas, irect, bgColors(state));
+      break;
+
+    case WebThemeEngine::PartInnerSpinButton: {
+      // stack half-height up and down arrows on top of each other
+      SkIRect lirect;
+      int halfHeight = rect.height / 2;
+      if (extraParams->innerSpin.readOnly)
+        state = blink::WebThemeEngine::StateDisabled;
+
+      lirect.set(rect.x, rect.y, rect.x + rect.width - 1,
+                 rect.y + halfHeight - 1);
+      box(canvas, lirect, bgColors(state));
+      bottom = lirect.fBottom;
+      quarterHeight = lirect.height() / 4;
+      triangle(canvas, left + quarterWidth, bottom - quarterHeight,
+               right - quarterWidth, bottom - quarterHeight, left + halfWidth,
+               top + quarterHeight, edgeColor);
+
+      lirect.set(rect.x, rect.y + halfHeight, rect.x + rect.width - 1,
+                 rect.y + 2 * halfHeight - 1);
+      top = lirect.fTop;
+      bottom = lirect.fBottom;
+      quarterHeight = lirect.height() / 4;
+      box(canvas, lirect, bgColors(state));
+      triangle(canvas, left + quarterWidth, top + quarterHeight,
+               right - quarterWidth, top + quarterHeight, left + halfWidth,
+               bottom - quarterHeight, edgeColor);
+      markState(canvas, irect, state);
+      break;
+    }
+    case WebThemeEngine::PartProgressBar: {
+      paint.setColor(bgColors(state));
+      paint.setStyle(SkPaint::kFill_Style);
+      canvas->drawIRect(irect, paint);
+
+      // Emulate clipping
+      SkIRect tofill = irect;
+      if (extraParams->progressBar.determinate) {
+        tofill.set(extraParams->progressBar.valueRectX,
+                   extraParams->progressBar.valueRectY,
+                   extraParams->progressBar.valueRectX +
+                       extraParams->progressBar.valueRectWidth - 1,
+                   extraParams->progressBar.valueRectY +
+                       extraParams->progressBar.valueRectHeight);
+      }
+
+      if (!tofill.intersect(irect))
+        tofill.setEmpty();
+
+      paint.setColor(edgeColor);
+      paint.setStyle(SkPaint::kFill_Style);
+      canvas->drawIRect(tofill, paint);
+
+      markState(canvas, irect, state);
+      break;
+    }
+    default:
+      // FIXME: Should we do something here to indicate that we got an invalid
+      // part?
+      // Unfortunately, we can't assert because we don't have access to WTF or
+      // base.
+      break;
+  }
+}
+
+}  // namespace content
+
+#endif  // !defined(OS_MACOSX)