components/webui_generator/view_model.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/webui_generator/view_model.h"
   6
   7 #include "components/webui_generator/view.h"
   8
   9 namespace webui_generator {
  10
  11 ViewModel::ContextEditor::ContextEditor(ViewModel& view_model)
  12     : view_model_(view_model), context_(view_model_.context()) {
  13 }
  14
  15 ViewModel::ContextEditor::~ContextEditor() {
  16   view_model_.CommitContextChanges();
  17 }
  18
  19 const ViewModel::ContextEditor& ViewModel::ContextEditor::SetBoolean(
  20     const KeyType& key,
  21     bool value) const {
  22   context_.SetBoolean(key, value);
  23   return *this;
  24 }
  25
  26 const ViewModel::ContextEditor& ViewModel::ContextEditor::SetInteger(
  27     const KeyType& key,
  28     int value) const {
  29   context_.SetInteger(key, value);
  30   return *this;
  31 }
  32
  33 const ViewModel::ContextEditor& ViewModel::ContextEditor::SetDouble(
  34     const KeyType& key,
  35     double value) const {
  36   context_.SetDouble(key, value);
  37   return *this;
  38 }
  39
  40 const ViewModel::ContextEditor& ViewModel::ContextEditor::SetString(
  41     const KeyType& key,
  42     const std::string& value) const {
  43   context_.SetString(key, value);
  44   return *this;
  45 }
  46
  47 const ViewModel::ContextEditor& ViewModel::ContextEditor::SetString(
  48     const KeyType& key,
  49     const base::string16& value) const {
  50   context_.SetString(key, value);
  51   return *this;
  52 }
  53
  54 const ViewModel::ContextEditor& ViewModel::ContextEditor::SetStringList(
  55     const KeyType& key,
  56     const StringList& value) const {
  57   context_.SetStringList(key, value);
  58   return *this;
  59 }
  60
  61 const ViewModel::ContextEditor& ViewModel::ContextEditor::SetString16List(
  62     const KeyType& key,
  63     const String16List& value) const {
  64   context_.SetString16List(key, value);
  65   return *this;
  66 }
  67
  68 ViewModel::ViewModel() : view_(nullptr) {
  69 }
  70
  71 ViewModel::~ViewModel() {
  72 }
  73
  74 void ViewModel::SetView(View* view) {
  75   view_ = view;
  76   Initialize();
  77 }
  78
  79 void ViewModel::OnChildrenReady() {
  80   OnAfterChildrenReady();
  81   view_->OnViewModelReady();
  82 }
  83
  84 void ViewModel::UpdateContext(const base::DictionaryValue& diff) {
  85   std::vector<std::string> changed_keys;
  86   context_.ApplyChanges(diff, &changed_keys);
  87   OnContextChanged(changed_keys);
  88 }
  89
  90 void ViewModel::OnEvent(const std::string& event) {
  91 }
  92
  93 ViewModel::ContextEditor ViewModel::GetContextEditor() {
  94   return ContextEditor(*this);
  95 }
  96
  97 void ViewModel::CommitContextChanges() {
  98   if (!context().HasChanges())
  99     return;
 100
 101   base::DictionaryValue diff;
 102   context().GetChangesAndReset(&diff);
 103   view_->OnContextChanged(diff);
 104 }
 105
 106 }  // namespace webui_generator