src/ui/views/controls/message_box_view.cc

   1 // Copyright (c) 2012 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 "ui/views/controls/message_box_view.h"
   6
   7 #include "base/i18n/rtl.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "base/strings/string_split.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "ui/accessibility/ax_view_state.h"
  12 #include "ui/base/clipboard/clipboard.h"
  13 #include "ui/base/clipboard/scoped_clipboard_writer.h"
  14 #include "ui/views/controls/button/checkbox.h"
  15 #include "ui/views/controls/image_view.h"
  16 #include "ui/views/controls/label.h"
  17 #include "ui/views/controls/link.h"
  18 #include "ui/views/controls/textfield/textfield.h"
  19 #include "ui/views/layout/grid_layout.h"
  20 #include "ui/views/layout/layout_constants.h"
  21 #include "ui/views/widget/widget.h"
  22 #include "ui/views/window/client_view.h"
  23 #include "ui/views/window/dialog_delegate.h"
  24
  25 namespace {
  26
  27 const int kDefaultMessageWidth = 320;
  28
  29 // Paragraph separators are defined in
  30 // http://www.unicode.org/Public/6.0.0/ucd/extracted/DerivedBidiClass.txt
  31 //
  32 // # Bidi_Class=Paragraph_Separator
  33 //
  34 // 000A          ; B # Cc       <control-000A>
  35 // 000D          ; B # Cc       <control-000D>
  36 // 001C..001E    ; B # Cc   [3] <control-001C>..<control-001E>
  37 // 0085          ; B # Cc       <control-0085>
  38 // 2029          ; B # Zp       PARAGRAPH SEPARATOR
  39 bool IsParagraphSeparator(base::char16 c) {
  40   return ( c == 0x000A || c == 0x000D || c == 0x001C || c == 0x001D ||
  41            c == 0x001E || c == 0x0085 || c == 0x2029);
  42 }
  43
  44 // Splits |text| into a vector of paragraphs.
  45 // Given an example "\nabc\ndef\n\n\nhij\n", the split results should be:
  46 // "", "abc", "def", "", "", "hij", and "".
  47 void SplitStringIntoParagraphs(const base::string16& text,
  48                                std::vector<base::string16>* paragraphs) {
  49   paragraphs->clear();
  50
  51   size_t start = 0;
  52   for (size_t i = 0; i < text.length(); ++i) {
  53     if (IsParagraphSeparator(text[i])) {
  54       paragraphs->push_back(text.substr(start, i - start));
  55       start = i + 1;
  56     }
  57   }
  58   paragraphs->push_back(text.substr(start, text.length() - start));
  59 }
  60
  61 }  // namespace
  62
  63 namespace views {
  64
  65 ///////////////////////////////////////////////////////////////////////////////
  66 // MessageBoxView, public:
  67
  68 MessageBoxView::InitParams::InitParams(const base::string16& message)
  69     : options(NO_OPTIONS),
  70       message(message),
  71       message_width(kDefaultMessageWidth),
  72       inter_row_vertical_spacing(kRelatedControlVerticalSpacing) {}
  73
  74 MessageBoxView::InitParams::~InitParams() {
  75 }
  76
  77 MessageBoxView::MessageBoxView(const InitParams& params)
  78     : prompt_field_(NULL),
  79       icon_(NULL),
  80       checkbox_(NULL),
  81       link_(NULL),
  82       message_width_(params.message_width) {
  83   Init(params);
  84 }
  85
  86 MessageBoxView::~MessageBoxView() {}
  87
  88 base::string16 MessageBoxView::GetInputText() {
  89   return prompt_field_ ? prompt_field_->text() : base::string16();
  90 }
  91
  92 bool MessageBoxView::IsCheckBoxSelected() {
  93   return checkbox_ ? checkbox_->checked() : false;
  94 }
  95
  96 void MessageBoxView::SetIcon(const gfx::ImageSkia& icon) {
  97   if (!icon_)
  98     icon_ = new ImageView();
  99   icon_->SetImage(icon);
 100   icon_->SetBounds(0, 0, icon.width(), icon.height());
 101   ResetLayoutManager();
 102 }
 103
 104 void MessageBoxView::SetCheckBoxLabel(const base::string16& label) {
 105   if (!checkbox_)
 106     checkbox_ = new Checkbox(label);
 107   else
 108     checkbox_->SetText(label);
 109   ResetLayoutManager();
 110 }
 111
 112 void MessageBoxView::SetCheckBoxSelected(bool selected) {
 113   if (!checkbox_)
 114     return;
 115   checkbox_->SetChecked(selected);
 116 }
 117
 118 void MessageBoxView::SetLink(const base::string16& text,
 119                              LinkListener* listener) {
 120   if (text.empty()) {
 121     DCHECK(!listener);
 122     delete link_;
 123     link_ = NULL;
 124   } else {
 125     DCHECK(listener);
 126     if (!link_) {
 127       link_ = new Link();
 128       link_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
 129     }
 130     link_->SetText(text);
 131     link_->set_listener(listener);
 132   }
 133   ResetLayoutManager();
 134 }
 135
 136 void MessageBoxView::GetAccessibleState(ui::AXViewState* state) {
 137   state->role = ui::AX_ROLE_ALERT;
 138 }
 139
 140 ///////////////////////////////////////////////////////////////////////////////
 141 // MessageBoxView, View overrides:
 142
 143 void MessageBoxView::ViewHierarchyChanged(
 144     const ViewHierarchyChangedDetails& details) {
 145   if (details.child == this && details.is_add) {
 146     if (prompt_field_)
 147       prompt_field_->SelectAll(true);
 148
 149     NotifyAccessibilityEvent(ui::AX_EVENT_ALERT, true);
 150   }
 151 }
 152
 153 bool MessageBoxView::AcceleratorPressed(const ui::Accelerator& accelerator) {
 154   // We only accepts Ctrl-C.
 155   DCHECK(accelerator.key_code() == 'C' && accelerator.IsCtrlDown());
 156
 157   // We must not intercept Ctrl-C when we have a text box and it's focused.
 158   if (prompt_field_ && prompt_field_->HasFocus())
 159     return false;
 160
 161   ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
 162   if (!clipboard)
 163     return false;
 164
 165   ui::ScopedClipboardWriter scw(clipboard, ui::CLIPBOARD_TYPE_COPY_PASTE);
 166   base::string16 text = message_labels_[0]->text();
 167   for (size_t i = 1; i < message_labels_.size(); ++i)
 168     text += message_labels_[i]->text();
 169   scw.WriteText(text);
 170   return true;
 171 }
 172
 173 ///////////////////////////////////////////////////////////////////////////////
 174 // MessageBoxView, private:
 175
 176 void MessageBoxView::Init(const InitParams& params) {
 177   if (params.options & DETECT_DIRECTIONALITY) {
 178     std::vector<base::string16> texts;
 179     SplitStringIntoParagraphs(params.message, &texts);
 180     for (size_t i = 0; i < texts.size(); ++i) {
 181       Label* message_label = new Label(texts[i]);
 182       // Avoid empty multi-line labels, which have a height of 0.
 183       message_label->SetMultiLine(!texts[i].empty());
 184       message_label->SetAllowCharacterBreak(true);
 185       message_label->set_directionality_mode(gfx::DIRECTIONALITY_FROM_TEXT);
 186       message_label->SetHorizontalAlignment(gfx::ALIGN_TO_HEAD);
 187       message_labels_.push_back(message_label);
 188     }
 189   } else {
 190     Label* message_label = new Label(params.message);
 191     message_label->SetMultiLine(true);
 192     message_label->SetAllowCharacterBreak(true);
 193     message_label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
 194     message_labels_.push_back(message_label);
 195   }
 196
 197   if (params.options & HAS_PROMPT_FIELD) {
 198     prompt_field_ = new Textfield;
 199     prompt_field_->SetText(params.default_prompt);
 200   }
 201
 202   inter_row_vertical_spacing_ = params.inter_row_vertical_spacing;
 203
 204   ResetLayoutManager();
 205 }
 206
 207 void MessageBoxView::ResetLayoutManager() {
 208   // Initialize the Grid Layout Manager used for this dialog box.
 209   GridLayout* layout = GridLayout::CreatePanel(this);
 210   SetLayoutManager(layout);
 211
 212   gfx::Size icon_size;
 213   if (icon_)
 214     icon_size = icon_->GetPreferredSize();
 215
 216   // Add the column set for the message displayed at the top of the dialog box.
 217   // And an icon, if one has been set.
 218   const int message_column_view_set_id = 0;
 219   ColumnSet* column_set = layout->AddColumnSet(message_column_view_set_id);
 220   if (icon_) {
 221     column_set->AddColumn(GridLayout::LEADING, GridLayout::LEADING, 0,
 222                           GridLayout::FIXED, icon_size.width(),
 223                           icon_size.height());
 224     column_set->AddPaddingColumn(0, kUnrelatedControlHorizontalSpacing);
 225   }
 226   column_set->AddColumn(GridLayout::FILL, GridLayout::FILL, 1,
 227                         GridLayout::FIXED, message_width_, 0);
 228
 229   // Column set for extra elements, if any.
 230   const int extra_column_view_set_id = 1;
 231   if (prompt_field_ || checkbox_ || link_) {
 232     column_set = layout->AddColumnSet(extra_column_view_set_id);
 233     if (icon_) {
 234       column_set->AddPaddingColumn(
 235           0, icon_size.width() + kUnrelatedControlHorizontalSpacing);
 236     }
 237     column_set->AddColumn(GridLayout::FILL, GridLayout::FILL, 1,
 238                           GridLayout::USE_PREF, 0, 0);
 239   }
 240
 241   for (size_t i = 0; i < message_labels_.size(); ++i) {
 242     layout->StartRow(i, message_column_view_set_id);
 243     if (icon_) {
 244       if (i == 0)
 245         layout->AddView(icon_);
 246       else
 247         layout->SkipColumns(1);
 248     }
 249     layout->AddView(message_labels_[i]);
 250   }
 251
 252   if (prompt_field_) {
 253     layout->AddPaddingRow(0, inter_row_vertical_spacing_);
 254     layout->StartRow(0, extra_column_view_set_id);
 255     layout->AddView(prompt_field_);
 256   }
 257
 258   if (checkbox_) {
 259     layout->AddPaddingRow(0, inter_row_vertical_spacing_);
 260     layout->StartRow(0, extra_column_view_set_id);
 261     layout->AddView(checkbox_);
 262   }
 263
 264   if (link_) {
 265     layout->AddPaddingRow(0, inter_row_vertical_spacing_);
 266     layout->StartRow(0, extra_column_view_set_id);
 267     layout->AddView(link_);
 268   }
 269 }
 270
 271 }  // namespace views