Add CSS agent for various window/widget/view attributes in devtools

ash/common/devtools/ash_devtools_css_agent.cc

Index: ash/common/devtools/ash_devtools_css_agent.cc
diff --git a/ash/common/devtools/ash_devtools_css_agent.cc b/ash/common/devtools/ash_devtools_css_agent.cc
new file mode 100644
index 0000000000000000000000000000000000000000..295b53a3b35307921173814b2b0cca68196a8fe4
--- /dev/null
+++ b/ash/common/devtools/ash_devtools_css_agent.cc
@@ -0,0 +1,93 @@
+// Copyright 2016 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 "ash/common/devtools/ash_devtools_css_agent.h"
+
+#include "ash/common/wm_window.h"
+
+namespace ash {
+namespace devtools {
+
+namespace {
+using namespace ui::devtools::protocol;
+
+std::unique_ptr<CSS::CSSProperty> BuildCSSProperty(const std::string& name,
+                                                   int value) {
+  return CSS::CSSProperty::create()
+      .setName(name)
+      .setValue(base::IntToString(value))
+      .build();
+}
+
+std::unique_ptr<Array<CSS::CSSProperty>> BuildBoundsCSSPropertyArray(
+    const gfx::Rect& bounds) {
+  auto cssProperties = Array<CSS::CSSProperty>::create();
+  cssProperties->addItem(BuildCSSProperty("height", bounds.height()));
+  cssProperties->addItem(BuildCSSProperty("width", bounds.width()));
+  cssProperties->addItem(BuildCSSProperty("x", bounds.x()));
+  cssProperties->addItem(BuildCSSProperty("y", bounds.y()));
+  return cssProperties;
+}
+
+std::unique_ptr<CSS::CSSStyle> BuildCSSStyle(
+    std::unique_ptr<Array<CSS::CSSProperty>> cssProperties) {
+  return CSS::CSSStyle::create()
+      .setCssProperties(std::move(cssProperties))
+      .setShorthandEntries(Array<std::string>::create())
+      .build();
+}
+
+std::unique_ptr<CSS::CSSStyle> BuildCSSStyleForBounds(const gfx::Rect& bounds) {
+  return BuildCSSStyle(BuildBoundsCSSPropertyArray(bounds));
+}
+
+std::unique_ptr<CSS::CSSStyle> BuildStyles(WmWindow* window) {
+  return BuildCSSStyleForBounds(window->GetBounds());
+}
+
+std::unique_ptr<CSS::CSSStyle> BuildStyles(views::Widget* widget) {
+  return BuildCSSStyleForBounds(widget->GetWindowBoundsInScreen());
+}
+
+std::unique_ptr<CSS::CSSStyle> BuildStyles(views::View* view) {
+  return BuildCSSStyleForBounds(view->bounds());
+}
+
+}  // namespace
+
+AshDevToolsCSSAgent::AshDevToolsCSSAgent(AshDevToolsDOMAgent* dom_agent)
+    : dom_agent_(dom_agent) {
+  DCHECK(dom_agent_);
+}
+
+AshDevToolsCSSAgent::~AshDevToolsCSSAgent() {}
+
+ui::devtools::protocol::Response AshDevToolsCSSAgent::getMatchedStylesForNode(
+    int nodeId,
+    ui::devtools::protocol::Maybe<ui::devtools::protocol::CSS::CSSStyle>*
+        inlineStyle) {
+  *inlineStyle = GetStylesForNode(nodeId);
+  return ui::devtools::protocol::Response::OK();
+}
+
+std::unique_ptr<ui::devtools::protocol::CSS::CSSStyle>
+AshDevToolsCSSAgent::GetStylesForNode(int nodeId) {
+  WmWindow* window = dom_agent_->GetWindowFromNodeId(nodeId);
+  if (window)
+    return BuildStyles(window);
+
+  views::Widget* widget = dom_agent_->GetWidgetFromNodeId(nodeId);
+  if (widget)
+    return BuildStyles(widget);
+
+  views::View* view = dom_agent_->GetViewFromNodeId(nodeId);
+  if (view)
+    return BuildStyles(view);
+
+  NOTREACHED();
+  return nullptr;
+}
+
+}  // namespace devtools
+}  // namespace ash