components/html_viewer/document_resource_waiter.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/html_viewer/document_resource_waiter.h"
   6
   7 #include "components/html_viewer/frame_tree_manager.h"
   8 #include "components/html_viewer/global_state.h"
   9 #include "components/html_viewer/html_document_oopif.h"
  10 #include "components/view_manager/public/cpp/view.h"
  11
  12 namespace html_viewer {
  13
  14 DocumentResourceWaiter::DocumentResourceWaiter(GlobalState* global_state,
  15                                                mojo::URLResponsePtr response,
  16                                                HTMLDocumentOOPIF* document)
  17     : global_state_(global_state),
  18       document_(document),
  19       response_(response.Pass()),
  20       root_(nullptr),
  21       frame_tree_client_binding_(this) {
  22 }
  23
  24 DocumentResourceWaiter::~DocumentResourceWaiter() {
  25 }
  26
  27 void DocumentResourceWaiter::Release(
  28     mojo::InterfaceRequest<mandoline::FrameTreeClient>*
  29         frame_tree_client_request,
  30     mandoline::FrameTreeServerPtr* frame_tree_server,
  31     mojo::Array<mandoline::FrameDataPtr>* frame_data,
  32     mojo::URLResponsePtr* response) {
  33   DCHECK(IsReady());
  34   *frame_tree_client_request = frame_tree_client_request_.Pass();
  35   *frame_tree_server = server_.Pass();
  36   *frame_data = frame_data_.Pass();
  37   *response = response_.Pass();
  38 }
  39
  40 bool DocumentResourceWaiter::IsReady() const {
  41   return root_ && root_->viewport_metrics().device_pixel_ratio != 0.0f &&
  42          !frame_data_.is_null();
  43 }
  44
  45 void DocumentResourceWaiter::Bind(
  46     mojo::InterfaceRequest<mandoline::FrameTreeClient> request) {
  47   if (frame_tree_client_binding_.is_bound() || !frame_data_.is_null()) {
  48     DVLOG(1) << "Request for FrameTreeClient after already supplied one";
  49     return;
  50   }
  51   frame_tree_client_binding_.Bind(request.Pass());
  52 }
  53
  54 void DocumentResourceWaiter::OnConnect(
  55     mandoline::FrameTreeServerPtr server,
  56     mojo::Array<mandoline::FrameDataPtr> frame_data) {
  57   DCHECK(frame_data_.is_null());
  58   server_ = server.Pass();
  59   frame_data_ = frame_data.Pass();
  60   CHECK(frame_data_.size() > 0u);
  61   frame_tree_client_request_ = frame_tree_client_binding_.Unbind();
  62   if (IsReady())
  63     document_->LoadIfNecessary();
  64 }
  65
  66 void DocumentResourceWaiter::OnFrameAdded(mandoline::FrameDataPtr frame_data) {
  67   // It is assumed we receive OnConnect() (which unbinds) before anything else.
  68   NOTREACHED();
  69 }
  70
  71 void DocumentResourceWaiter::OnFrameRemoved(uint32_t frame_id) {
  72   // It is assumed we receive OnConnect() (which unbinds) before anything else.
  73   NOTREACHED();
  74 }
  75
  76 }  // namespace html_viewer