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// Copyright 2015 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 MANDOLINE_TAB_FRAME_H_
#define MANDOLINE_TAB_FRAME_H_
#include <vector>
#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "components/view_manager/public/cpp/view_observer.h"
#include "mandoline/tab/public/interfaces/frame_tree.mojom.h"
#include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
namespace mandoline {
class FrameTree;
class FrameTreeClient;
class FrameUserData;
enum class ViewOwnership {
OWNS_VIEW,
DOESNT_OWN_VIEW,
};
// Frame represents an embedding in a frame. Frames own their children.
// Frames automatically delete themself if the View the frame is associated
// with is deleted.
class Frame : public mojo::ViewObserver, public FrameTreeServer {
public:
Frame(FrameTree* tree,
mojo::View* view,
ViewOwnership view_ownership,
FrameTreeClient* frame_tree_client,
scoped_ptr<FrameUserData> user_data);
~Frame() override;
void Init(Frame* parent);
// Walks the View tree starting at |view| going up returning the first
// Frame that is associated with |view|. For example, if |view|
// has a Frame associated with it, then that is returned. Otherwise
// this checks view->parent() and so on.
static Frame* FindFirstFrameAncestor(mojo::View* view);
FrameTree* tree() { return tree_; }
Frame* parent() { return parent_; }
const Frame* parent() const { return parent_; }
mojo::View* view() { return view_; }
const mojo::View* view() const { return view_; }
// Finds the descendant with the specified id.
Frame* FindFrame(uint32_t id) {
return const_cast<Frame*>(const_cast<const Frame*>(this)->FindFrame(id));
}
const Frame* FindFrame(uint32_t id) const;
bool HasAncestor(const Frame* frame) const;
FrameUserData* user_data() { return user_data_.get(); }
private:
friend class FrameTree;
// Adds this to |frames| and recurses through the children calling the
// same function.
void BuildFrameTree(std::vector<const Frame*>* frames) const;
void Add(Frame* node);
void Remove(Frame* node);
// Notifies the client and all descendants as appropriate.
void NotifyAdded(const Frame* source, const Frame* added_node);
void NotifyRemoved(const Frame* source, const Frame* removed_node);
// mojo::ViewObserver:
void OnViewDestroying(mojo::View* view) override;
// FrameTreeServer:
void PostMessageEventToFrame(uint32_t frame_id,
MessageEventPtr event) override;
void NavigateFrame(uint32_t frame_id) override;
void ReloadFrame(uint32_t frame_id) override;
FrameTree* const tree_;
mojo::View* view_;
Frame* parent_;
ViewOwnership view_ownership_;
std::vector<Frame*> children_;
scoped_ptr<FrameUserData> user_data_;
FrameTreeClient* frame_tree_client_;
mojo::Binding<FrameTreeServer> frame_tree_server_binding_;
DISALLOW_COPY_AND_ASSIGN(Frame);
};
} // namespace mandoline
#endif // MANDOLINE_TAB_FRAME_H_
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