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// 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 "components/ui_devtools/css_agent.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "components/ui_devtools/ui_element.h"
namespace ui_devtools {
namespace {
using namespace ui_devtools::protocol;
const char kHeight[] = "height";
const char kWidth[] = "width";
const char kX[] = "x";
const char kY[] = "y";
const char kVisibility[] = "visibility";
std::unique_ptr<CSS::SourceRange> BuildDefaultSourceRange() {
// These tell the frontend where in the stylesheet a certain style
// is located. Since we don't have stylesheets, this is all 0.
// We need this because CSS fields are not editable unless
// the range is provided.
return CSS::SourceRange::create()
.setStartLine(0)
.setEndLine(0)
.setStartColumn(0)
.setEndColumn(0)
.build();
}
std::unique_ptr<CSS::CSSProperty> BuildCSSProperty(const std::string& name,
int value) {
return CSS::CSSProperty::create()
.setRange(BuildDefaultSourceRange())
.setName(name)
.setValue(base::IntToString(value))
.build();
}
std::unique_ptr<CSS::CSSProperty> BuildCSSProperty(const std::string& name,
const std::string& value) {
return CSS::CSSProperty::create()
.setRange(BuildDefaultSourceRange())
.setName(name)
.setValue(value)
.build();
}
std::unique_ptr<Array<CSS::CSSProperty>> BuildCSSPropertyArray(
const gfx::Rect& bounds,
const bool visible) {
auto cssProperties = Array<CSS::CSSProperty>::create();
cssProperties->addItem(BuildCSSProperty(kHeight, bounds.height()));
cssProperties->addItem(BuildCSSProperty(kWidth, bounds.width()));
cssProperties->addItem(BuildCSSProperty(kX, bounds.x()));
cssProperties->addItem(BuildCSSProperty(kY, bounds.y()));
cssProperties->addItem(BuildCSSProperty(kVisibility, visible));
return cssProperties;
}
std::unique_ptr<CSS::CSSStyle> BuildCSSStyle(UIElement* ui_element) {
gfx::Rect bounds;
bool visible;
ui_element->GetBounds(&bounds);
ui_element->GetVisible(&visible);
std::unique_ptr<Array<CSS::CSSProperty>> css_properties(
BuildCSSPropertyArray(bounds, visible));
const std::vector<std::pair<std::string, std::string>> properties(
ui_element->GetCustomProperties());
for (const auto& it : properties)
css_properties->addItem(BuildCSSProperty(it.first, it.second));
return CSS::CSSStyle::create()
.setRange(BuildDefaultSourceRange())
.setStyleSheetId(base::IntToString(ui_element->node_id()))
.setCssProperties(std::move(css_properties))
.setShorthandEntries(Array<std::string>::create())
.build();
}
Response NodeNotFoundError(int node_id) {
return Response::Error("Node with id=" + std::to_string(node_id) +
" not found");
}
Response ParseProperties(const std::string& style_text,
gfx::Rect* bounds,
bool* visible) {
std::vector<std::string> tokens = base::SplitString(
style_text, ":;", base::TRIM_WHITESPACE, base::SPLIT_WANT_NONEMPTY);
for (size_t i = 0; i < tokens.size() - 1; i += 2) {
const std::string& property = tokens.at(i);
int value;
if (!base::StringToInt(tokens.at(i + 1), &value))
return Response::Error("Unable to parse value for property=" + property);
if (property == kHeight)
bounds->set_height(std::max(0, value));
else if (property == kWidth)
bounds->set_width(std::max(0, value));
else if (property == kX)
bounds->set_x(value);
else if (property == kY)
bounds->set_y(value);
else if (property == kVisibility)
*visible = std::max(0, value) == 1;
else
return Response::Error("Unsupported property=" + property);
}
return Response::OK();
}
} // namespace
CSSAgent::CSSAgent(DOMAgent* dom_agent) : dom_agent_(dom_agent) {
DCHECK(dom_agent_);
}
CSSAgent::~CSSAgent() {
disable();
}
Response CSSAgent::enable() {
dom_agent_->AddObserver(this);
return Response::OK();
}
Response CSSAgent::disable() {
dom_agent_->RemoveObserver(this);
return Response::OK();
}
Response CSSAgent::getMatchedStylesForNode(int node_id,
Maybe<CSS::CSSStyle>* inline_style) {
UIElement* ui_element = dom_agent_->GetElementFromNodeId(node_id);
*inline_style = GetStylesForUIElement(ui_element);
if (!inline_style)
return NodeNotFoundError(node_id);
return Response::OK();
}
Response CSSAgent::setStyleTexts(
std::unique_ptr<Array<CSS::StyleDeclarationEdit>> edits,
std::unique_ptr<Array<CSS::CSSStyle>>* result) {
std::unique_ptr<Array<CSS::CSSStyle>> updated_styles =
Array<CSS::CSSStyle>::create();
for (size_t i = 0; i < edits->length(); i++) {
auto* edit = edits->get(i);
int node_id;
if (!base::StringToInt(edit->getStyleSheetId(), &node_id))
return Response::Error("Invalid node id");
UIElement* ui_element = dom_agent_->GetElementFromNodeId(node_id);
gfx::Rect updated_bounds;
bool visible = false;
if (!GetPropertiesForUIElement(ui_element, &updated_bounds, &visible))
return NodeNotFoundError(node_id);
Response response(
ParseProperties(edit->getText(), &updated_bounds, &visible));
if (!response.isSuccess())
return response;
updated_styles->addItem(BuildCSSStyle(ui_element));
if (!SetPropertiesForUIElement(ui_element, updated_bounds, visible))
return NodeNotFoundError(node_id);
}
*result = std::move(updated_styles);
return Response::OK();
}
void CSSAgent::OnElementBoundsChanged(UIElement* ui_element) {
InvalidateStyleSheet(ui_element);
}
std::unique_ptr<CSS::CSSStyle> CSSAgent::GetStylesForUIElement(
UIElement* ui_element) {
gfx::Rect bounds;
bool visible = false;
return GetPropertiesForUIElement(ui_element, &bounds, &visible)
? BuildCSSStyle(ui_element)
: nullptr;
}
void CSSAgent::InvalidateStyleSheet(UIElement* ui_element) {
// The stylesheetId for each node is equivalent to its node_id (as a string).
frontend()->styleSheetChanged(base::IntToString(ui_element->node_id()));
}
bool CSSAgent::GetPropertiesForUIElement(UIElement* ui_element,
gfx::Rect* bounds,
bool* visible) {
if (ui_element) {
ui_element->GetBounds(bounds);
ui_element->GetVisible(visible);
return true;
}
return false;
}
bool CSSAgent::SetPropertiesForUIElement(UIElement* ui_element,
const gfx::Rect& bounds,
bool visible) {
if (ui_element) {
ui_element->SetBounds(bounds);
ui_element->SetVisible(visible);
return true;
}
return false;
}
} // namespace ui_devtools
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