Update the UI examples.

examples/pdf_viewer/pdf_viewer.cc

-// 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 <string>
-
-#include "examples/bitmap_uploader/bitmap_uploader.h"
-#include "mojo/application/application_runner_chromium.h"
-#include "mojo/application/content_handler_factory.h"
-#include "mojo/data_pipe_utils/data_pipe_utils.h"
-#include "mojo/public/c/system/main.h"
-#include "mojo/public/cpp/application/application_connection.h"
-#include "mojo/public/cpp/application/application_delegate.h"
-#include "mojo/public/cpp/application/application_impl.h"
-#include "mojo/public/cpp/application/interface_factory_impl.h"
-#include "mojo/public/cpp/application/service_provider_impl.h"
-#include "mojo/services/content_handler/interfaces/content_handler.mojom.h"
-#include "mojo/services/input_events/interfaces/input_events.mojom.h"
-#include "mojo/services/input_events/interfaces/input_key_codes.mojom.h"
-#include "mojo/services/view_manager/cpp/types.h"
-#include "mojo/services/view_manager/cpp/view.h"
-#include "mojo/services/view_manager/cpp/view_manager.h"
-#include "mojo/services/view_manager/cpp/view_manager_client_factory.h"
-#include "mojo/services/view_manager/cpp/view_manager_delegate.h"
-#include "mojo/services/view_manager/cpp/view_observer.h"
-#include "third_party/pdfium/fpdfsdk/include/fpdf_ext.h"
-#include "third_party/pdfium/fpdfsdk/include/fpdfview.h"
-#include "v8/include/v8.h"
-
-#define BACKGROUND_COLOR 0xFF888888
-
-namespace mojo {
-namespace examples {
-
-namespace {
-
-class EmbedderData {
- public:
-  EmbedderData(Shell* shell, View* root) : bitmap_uploader_(root) {
-    bitmap_uploader_.Init(shell);
-    bitmap_uploader_.SetColor(BACKGROUND_COLOR);
-  }
-
-  BitmapUploader& bitmap_uploader() { return bitmap_uploader_; }
-
- private:
-  BitmapUploader bitmap_uploader_;
-
-  DISALLOW_COPY_AND_ASSIGN(EmbedderData);
-};
-
-}  // namespace
-
-class PDFView : public ApplicationDelegate,
-                public ViewManagerDelegate,
-                public ViewObserver {
- public:
-  PDFView(URLResponsePtr response)
-      : current_page_(0), page_count_(0), doc_(NULL), app_(nullptr) {
-    FetchPDF(response.Pass());
-  }
-
-  ~PDFView() override {
-    if (doc_)
-      FPDF_CloseDocument(doc_);
-    for (auto& roots : embedder_for_roots_) {
-      roots.first->RemoveObserver(this);
-      delete roots.second;
-    }
-  }
-
- private:
-  // Overridden from ApplicationDelegate:
-  void Initialize(ApplicationImpl* app) override {
-    app_ = app;
-    view_manager_client_factory_.reset(
-        new ViewManagerClientFactory(app->shell(), this));
-  }
-
-  bool ConfigureIncomingConnection(ApplicationConnection* connection) override {
-    connection->AddService(view_manager_client_factory_.get());
-    return true;
-  }
-
-  // Overridden from ViewManagerDelegate:
-  void OnEmbed(View* root,
-               InterfaceRequest<ServiceProvider> services,
-               ServiceProviderPtr exposed_services) override {
-    DCHECK(embedder_for_roots_.find(root) == embedder_for_roots_.end());
-    root->AddObserver(this);
-    EmbedderData* embedder_data = new EmbedderData(app_->shell(), root);
-    embedder_for_roots_[root] = embedder_data;
-    DrawBitmap(embedder_data);
-  }
-
-  void OnViewManagerDisconnected(ViewManager* view_manager) override {}
-
-  // Overridden from ViewObserver:
-  void OnViewBoundsChanged(View* view,
-                           const Rect& old_bounds,
-                           const Rect& new_bounds) override {
-    DCHECK(embedder_for_roots_.find(view) != embedder_for_roots_.end());
-    DrawBitmap(embedder_for_roots_[view]);
-  }
-
-  void OnViewInputEvent(View* view, const EventPtr& event) override {
-    DCHECK(embedder_for_roots_.find(view) != embedder_for_roots_.end());
-    if (event->key_data &&
-        (event->action != EventType::KEY_PRESSED || event->key_data->is_char)) {
-      return;
-    }
-    if ((event->key_data &&
-         event->key_data->windows_key_code == KeyboardCode::DOWN) ||
-        (event->pointer_data && event->pointer_data->vertical_wheel < 0)) {
-      if (current_page_ < (page_count_ - 1)) {
-        current_page_++;
-        DrawBitmap(embedder_for_roots_[view]);
-      }
-    } else if ((event->key_data &&
-                event->key_data->windows_key_code == KeyboardCode::UP) ||
-               (event->pointer_data &&
-                event->pointer_data->vertical_wheel > 0)) {
-      if (current_page_ > 0) {
-        current_page_--;
-        DrawBitmap(embedder_for_roots_[view]);
-      }
-    }
-  }
-
-  void OnViewDestroyed(View* view) override {
-    DCHECK(embedder_for_roots_.find(view) != embedder_for_roots_.end());
-    const auto& it = embedder_for_roots_.find(view);
-    DCHECK(it != embedder_for_roots_.end());
-    delete it->second;
-    embedder_for_roots_.erase(it);
-    if (embedder_for_roots_.size() == 0)
-      ApplicationImpl::Terminate();
-  }
-
-  void DrawBitmap(EmbedderData* embedder_data) {
-    if (!doc_)
-      return;
-
-    FPDF_PAGE page = FPDF_LoadPage(doc_, current_page_);
-    int width = static_cast<int>(FPDF_GetPageWidth(page));
-    int height = static_cast<int>(FPDF_GetPageHeight(page));
-
-    scoped_ptr<std::vector<unsigned char>> bitmap;
-    bitmap.reset(new std::vector<unsigned char>);
-    bitmap->resize(width * height * 4);
-
-    FPDF_BITMAP f_bitmap = FPDFBitmap_CreateEx(width, height, FPDFBitmap_BGRA,
-                                               &(*bitmap)[0], width * 4);
-    FPDFBitmap_FillRect(f_bitmap, 0, 0, width, height, 0xFFFFFFFF);
-    FPDF_RenderPageBitmap(f_bitmap, page, 0, 0, width, height, 0, 0);
-    FPDFBitmap_Destroy(f_bitmap);
-
-    FPDF_ClosePage(page);
-
-    embedder_data->bitmap_uploader().SetBitmap(width, height, bitmap.Pass(),
-                                               BitmapUploader::BGRA);
-  }
-
-  void FetchPDF(URLResponsePtr response) {
-    data_.clear();
-    mojo::common::BlockingCopyToString(response->body.Pass(), &data_);
-    if (data_.length() >= static_cast<size_t>(std::numeric_limits<int>::max()))
-      return;
-    doc_ = FPDF_LoadMemDocument(data_.data(), static_cast<int>(data_.length()),
-                                nullptr);
-    page_count_ = FPDF_GetPageCount(doc_);
-  }
-
-  std::string data_;
-  int current_page_;
-  int page_count_;
-  FPDF_DOCUMENT doc_;
-  ApplicationImpl* app_;
-  std::map<View*, EmbedderData*> embedder_for_roots_;
-  scoped_ptr<ViewManagerClientFactory> view_manager_client_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(PDFView);
-};
-
-class PDFViewer : public ApplicationDelegate,
-                  public ContentHandlerFactory::ManagedDelegate {
- public:
-  PDFViewer() : content_handler_factory_(this) {
-    v8::V8::InitializeICU();
-    FPDF_InitLibrary();
-  }
-
-  ~PDFViewer() override { FPDF_DestroyLibrary(); }
-
- private:
-  // Overridden from ApplicationDelegate:
-  bool ConfigureIncomingConnection(ApplicationConnection* connection) override {
-    connection->AddService(&content_handler_factory_);
-    return true;
-  }
-
-  // Overridden from ContentHandlerFactory::ManagedDelegate:
-  scoped_ptr<ContentHandlerFactory::HandledApplicationHolder>
-  CreateApplication(InterfaceRequest<Application> application_request,
-                    URLResponsePtr response) override {
-    return make_handled_factory_holder(new mojo::ApplicationImpl(
-        new PDFView(response.Pass()), application_request.Pass()));
-  }
-
-  ContentHandlerFactory content_handler_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(PDFViewer);
-};
-
-}  // namespace examples
-}  // namespace mojo
-
-MojoResult MojoMain(MojoHandle application_request) {
-  mojo::ApplicationRunnerChromium runner(new mojo::examples::PDFViewer());
-  return runner.Run(application_request);
-}