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// Copyright 2017 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.
#ifndef COMPONENTS_UI_DEVTOOLS_UI_ELEMENT_H_
#define COMPONENTS_UI_DEVTOOLS_UI_ELEMENT_H_
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/macros.h"
#include "components/ui_devtools/devtools_export.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/native_widget_types.h"
namespace ui_devtools {
class UIElementDelegate;
// UIElement type.
enum UIElementType { WINDOW, WIDGET, VIEW, ROOT, FRAMESINK, SURFACE };
class UI_DEVTOOLS_EXPORT UIElement {
public:
struct UI_DEVTOOLS_EXPORT UIProperty {
UIProperty(std::string name, std::string value)
: name_(name), value_(value) {}
std::string name_;
std::string value_;
};
struct UI_DEVTOOLS_EXPORT ClassProperties {
ClassProperties(std::string name, std::vector<UIProperty> properties);
ClassProperties(const ClassProperties& copy);
~ClassProperties();
std::string class_name_;
std::vector<UIProperty> properties_;
};
struct UI_DEVTOOLS_EXPORT Source {
Source(std::string path, int line);
std::string path_;
int line_;
};
using UIElements = std::vector<UIElement*>;
// resets node ids to 0 so that they are reusable
static void ResetNodeId();
virtual ~UIElement();
int node_id() const { return node_id_; }
std::string GetTypeName() const;
UIElement* parent() const { return parent_; }
void set_parent(UIElement* parent) { parent_ = parent; }
UIElementDelegate* delegate() const { return delegate_; }
UIElementType type() const { return type_; }
const UIElements& children() const { return children_; }
bool is_updating() const { return is_updating_; }
void set_is_updating(bool is_updating) { is_updating_ = is_updating; }
void set_owns_children(bool owns_children) { owns_children_ = owns_children; }
int GetBaseStylesheetId() const { return base_stylesheet_id_; }
void SetBaseStylesheetId(int id) { base_stylesheet_id_ = id; }
// Gets/sets whether the element has sent its stylesheet header to the
// frontend.
bool header_sent() const { return header_sent_; }
void set_header_sent() { header_sent_ = true; }
using ElementCompare = bool (*)(const UIElement*, const UIElement*);
// Inserts |child| in front of |before|. If |before| is null, it is inserted
// at the end. Parent takes ownership of the added child.
void AddChild(UIElement* child, UIElement* before = nullptr);
// Inserts |child| according to a custom ordering function. |notify_delegate|
// calls OnUIElementAdded(), which creates the subtree of UIElements at
// |child|, and the corresponding DOM nodes.
void AddOrderedChild(UIElement* child,
ElementCompare compare,
bool notify_delegate = true);
// Removes all elements from |children_|. Caller is responsible for destroying
// children.
void ClearChildren();
// Removes |child| out of |children_| without destroying |child|. The caller
// is responsible for destroying |child|. |notify_delegate| calls
// OnUIElementRemoved(), which destroys the DOM node for |child|.
void RemoveChild(UIElement* child, bool notify_delegate = true);
// Moves |child| to position |index| in |children_|.
void ReorderChild(UIElement* child, int index);
template <class T>
int FindUIElementIdForBackendElement(T* element) const;
// Returns properties grouped by the class they are from.
virtual std::vector<ClassProperties> GetCustomPropertiesForMatchedStyle()
const;
virtual void GetBounds(gfx::Rect* bounds) const = 0;
virtual void SetBounds(const gfx::Rect& bounds) = 0;
virtual void GetVisible(bool* visible) const = 0;
virtual void SetVisible(bool visible) = 0;
// Set this element's property values according to |text|.
// |text| is the string passed in through StyleDeclarationEdit::text from
// the frontend.
virtual bool SetPropertiesFromString(const std::string& text);
// If element exists, returns its associated native window and its screen
// bounds. Otherwise, returns null and empty bounds.
virtual std::pair<gfx::NativeWindow, gfx::Rect> GetNodeWindowAndScreenBounds()
const = 0;
// Returns a list of interleaved keys and values of attributes to be displayed
// on the element in the dev tools hierarchy view.
virtual std::vector<std::string> GetAttributes() const = 0;
template <typename BackingT, typename T>
static BackingT* GetBackingElement(const UIElement* element) {
return T::From(element);
}
// Called from PageAgent to repaint Views for Debug Bounds Rectangles
virtual void PaintRect() const {}
// Called in the constructor to initialize the element's sources.
virtual void InitSources() {}
// Get the sources for the element.
std::vector<Source> GetSources();
protected:
UIElement(const UIElementType type,
UIElementDelegate* delegate,
UIElement* parent);
void AddSource(std::string path, int line);
private:
const int node_id_;
const UIElementType type_;
UIElements children_;
UIElement* parent_;
UIElementDelegate* delegate_;
bool is_updating_ = false;
bool owns_children_ = true;
int base_stylesheet_id_;
bool header_sent_ = false;
std::vector<Source> sources_;
DISALLOW_COPY_AND_ASSIGN(UIElement);
};
} // namespace ui_devtools
#endif // COMPONENTS_UI_DEVTOOLS_UI_ELEMENT_H_
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