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// 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 <algorithm>
#include "base/strings/string_tokenizer.h"
#include "mojo/public/cpp/application/application.h"
#include "mojo/services/public/cpp/view_manager/node.h"
#include "mojo/services/public/cpp/view_manager/types.h"
#include "mojo/services/public/cpp/view_manager/view.h"
#include "mojo/services/public/cpp/view_manager/view_manager.h"
#include "mojo/services/public/cpp/view_manager/view_manager_delegate.h"
#include "mojo/services/public/interfaces/launcher/launcher.mojom.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/codec/png_codec.h"
namespace mojo {
namespace examples {
class ImageViewer;
class LaunchableConnection : public InterfaceImpl<launcher::Launchable> {
public:
explicit LaunchableConnection(ImageViewer* viewer) : viewer_(viewer) {}
virtual ~LaunchableConnection() {}
private:
// Overridden from launcher::Launchable:
virtual void OnLaunch(URLResponsePtr response,
ScopedDataPipeConsumerHandle response_body_stream,
uint32_t node_id) OVERRIDE {
int content_length = GetContentLength(response->headers);
unsigned char* data = new unsigned char[content_length];
unsigned char* buf = data;
uint32_t bytes_remaining = content_length;
uint32_t num_bytes = bytes_remaining;
while (bytes_remaining > 0) {
MojoResult result = ReadDataRaw(
response_body_stream.get(),
buf,
&num_bytes,
MOJO_READ_DATA_FLAG_NONE);
if (result == MOJO_RESULT_SHOULD_WAIT) {
Wait(response_body_stream.get(),
MOJO_WAIT_FLAG_READABLE,
MOJO_DEADLINE_INDEFINITE);
} else if (result == MOJO_RESULT_OK) {
buf += num_bytes;
num_bytes = bytes_remaining -= num_bytes;
} else {
break;
}
}
SkBitmap bitmap;
gfx::PNGCodec::Decode(static_cast<const unsigned char*>(data),
content_length, &bitmap);
UpdateView(node_id, bitmap);
delete[] data;
}
void UpdateView(view_manager::Id node_id, const SkBitmap& bitmap);
int GetContentLength(const Array<String>& headers) {
for (size_t i = 0; i < headers.size(); ++i) {
base::StringTokenizer t(headers[i], ": ;=");
while (t.GetNext()) {
if (!t.token_is_delim() && t.token() == "Content-Length") {
while (t.GetNext()) {
if (!t.token_is_delim())
return atoi(t.token().c_str());
}
}
}
}
return 0;
}
ImageViewer* viewer_;
DISALLOW_COPY_AND_ASSIGN(LaunchableConnection);
};
class ImageViewer : public Application,
public view_manager::ViewManagerDelegate {
public:
ImageViewer() : content_view_(NULL) {}
virtual ~ImageViewer() {}
void UpdateView(view_manager::Id node_id, const SkBitmap& bitmap) {
bitmap_ = bitmap;
DrawBitmap();
}
private:
// Overridden from Application:
virtual void Initialize() OVERRIDE {
AddService<LaunchableConnection>(this);
view_manager::ViewManager::Create(this, this);
}
// Overridden from view_manager::ViewManagerDelegate:
virtual void OnRootAdded(view_manager::ViewManager* view_manager,
view_manager::Node* root) OVERRIDE {
content_view_ = view_manager::View::Create(view_manager);
root->SetActiveView(content_view_);
content_view_->SetColor(SK_ColorRED);
if (!bitmap_.isNull())
DrawBitmap();
}
void DrawBitmap() {
if (content_view_)
content_view_->SetContents(bitmap_);
}
view_manager::View* content_view_;
SkBitmap bitmap_;
DISALLOW_COPY_AND_ASSIGN(ImageViewer);
};
void LaunchableConnection::UpdateView(view_manager::Id node_id,
const SkBitmap& bitmap) {
viewer_->UpdateView(node_id, bitmap);
}
} // namespace examples
// static
Application* Application::Create() {
return new examples::ImageViewer;
}
} // namespace mojo
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