components/web_view/frame_tree.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/web_view/frame_tree.h"
   6
   7 #include "components/web_view/frame_tree_delegate.h"
   8 #include "components/web_view/frame_user_data.h"
   9
  10 namespace web_view {
  11
  12 FrameTree::FrameTree(uint32_t root_app_id,
  13                      mus::View* view,
  14                      mojo::ViewTreeClientPtr view_tree_client,
  15                      FrameTreeDelegate* delegate,
  16                      mojom::FrameClient* root_client,
  17                      scoped_ptr<FrameUserData> user_data,
  18                      const Frame::ClientPropertyMap& client_properties)
  19     : view_(view),
  20       delegate_(delegate),
  21       root_(new Frame(this,
  22                       view,
  23                       view->id(),
  24                       root_app_id,
  25                       ViewOwnership::DOESNT_OWN_VIEW,
  26                       root_client,
  27                       user_data.Pass(),
  28                       client_properties)),
  29       progress_(0.f),
  30       change_id_(1u) {
  31   root_->Init(nullptr, view_tree_client.Pass(), nullptr);
  32 }
  33
  34 FrameTree::~FrameTree() {
  35   // Destroy the root explicitly in case it calls back to us for state (such
  36   // as to see if it is the root).
  37   delete root_;
  38   root_ = nullptr;
  39 }
  40
  41 Frame* FrameTree::CreateChildFrame(
  42     Frame* parent,
  43     mojo::InterfaceRequest<mojom::Frame> frame_request,
  44     mojom::FrameClientPtr client,
  45     uint32_t frame_id,
  46     uint32_t app_id,
  47     const Frame::ClientPropertyMap& client_properties) {
  48   mojom::FrameClient* raw_client = client.get();
  49   scoped_ptr<FrameUserData> user_data =
  50       delegate_->CreateUserDataForNewFrame(client.Pass());
  51   mus::View* frame_view = root_->view()->GetChildById(frame_id);
  52   // |frame_view| may be null if the View hasn't been created yet. If this is
  53   // the case the View will be connected to the Frame in Frame::OnTreeChanged.
  54   Frame* frame =
  55       new Frame(this, frame_view, frame_id, app_id, ViewOwnership::OWNS_VIEW,
  56                 raw_client, user_data.Pass(), client_properties);
  57   frame->Init(parent, nullptr, frame_request.Pass());
  58   return frame;
  59 }
  60
  61 uint32_t FrameTree::AdvanceChangeID() {
  62   return ++change_id_;
  63 }
  64
  65 void FrameTree::LoadingStateChanged() {
  66   const bool loading = root_->IsLoading();
  67   if (loading) {
  68     int frame_count = 0;
  69     const double total_progress = root_->GatherProgress(&frame_count);
  70     // Make sure the progress bar never runs backwards, even if that means
  71     // accuracy takes a hit.
  72     progress_ = std::max(progress_, total_progress / frame_count);
  73   }
  74   delegate_->LoadingStateChanged(loading, progress_);
  75 }
  76
  77 void FrameTree::TitleChanged(const mojo::String& title) {
  78   delegate_->TitleChanged(title);
  79 }
  80
  81 void FrameTree::DidCommitProvisionalLoad(Frame* source) {
  82   delegate_->DidCommitProvisionalLoad(source);
  83 }
  84
  85 void FrameTree::ClientPropertyChanged(const Frame* source,
  86                                       const mojo::String& name,
  87                                       const mojo::Array<uint8_t>& value) {
  88   root_->NotifyClientPropertyChanged(source, name, value);
  89 }
  90
  91 }  // namespace web_view