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Diffstat (limited to 'chromium/mojo/examples/image_viewer/image_viewer.cc')
-rw-r--r-- | chromium/mojo/examples/image_viewer/image_viewer.cc | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/chromium/mojo/examples/image_viewer/image_viewer.cc b/chromium/mojo/examples/image_viewer/image_viewer.cc new file mode 100644 index 00000000000..4eb987c1ec5 --- /dev/null +++ b/chromium/mojo/examples/image_viewer/image_viewer.cc @@ -0,0 +1,138 @@ +// 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/navigation/navigation.mojom.h" +#include "third_party/skia/include/core/SkBitmap.h" +#include "ui/gfx/codec/png_codec.h" + +namespace mojo { +namespace examples { + +class ImageViewer; + +class NavigatorImpl : public InterfaceImpl<navigation::Navigator> { + public: + explicit NavigatorImpl(ImageViewer* viewer) : viewer_(viewer) {} + virtual ~NavigatorImpl() {} + + private: + // Overridden from navigation::Navigate: + virtual void Navigate( + uint32_t node_id, + navigation::NavigationDetailsPtr navigation_details, + navigation::ResponseDetailsPtr response_details) OVERRIDE { + int content_length = GetContentLength(response_details->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_details->response_body_stream.get(), + buf, + &num_bytes, + MOJO_READ_DATA_FLAG_NONE); + if (result == MOJO_RESULT_SHOULD_WAIT) { + Wait(response_details->response_body_stream.get(), + MOJO_HANDLE_SIGNAL_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(NavigatorImpl); +}; + +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<NavigatorImpl>(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 NavigatorImpl::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 |