chrome/browser/ui/views/bookmarks/bookmark_bar_instructions_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 "chrome/browser/ui/views/bookmarks/bookmark_bar_instructions_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/strings/utf_string_conversions.h"
  10 #include "chrome/browser/defaults.h"
  11 #include "chrome/browser/themes/theme_properties.h"
  12 #include "chrome/browser/ui/bookmarks/bookmark_bar_instructions_delegate.h"
  13 #include "grit/generated_resources.h"
  14 #include "ui/accessibility/ax_view_state.h"
  15 #include "ui/base/l10n/l10n_util.h"
  16 #include "ui/base/theme_provider.h"
  17 #include "ui/views/controls/label.h"
  18 #include "ui/views/controls/link.h"
  19
  20 namespace {
  21
  22 // Horizontal padding, in pixels, between the link and label.
  23 const int kViewPadding = 6;
  24
  25 }  // namespace
  26
  27 BookmarkBarInstructionsView::BookmarkBarInstructionsView(
  28     BookmarkBarInstructionsDelegate* delegate)
  29     : delegate_(delegate),
  30       instructions_(NULL),
  31       import_link_(NULL),
  32       baseline_(-1),
  33       updated_colors_(false) {
  34   instructions_ = new views::Label(
  35       l10n_util::GetStringUTF16(IDS_BOOKMARKS_NO_ITEMS));
  36   instructions_->SetAutoColorReadabilityEnabled(false);
  37   AddChildView(instructions_);
  38
  39   if (browser_defaults::kShowImportOnBookmarkBar) {
  40     import_link_ = new views::Link(
  41         l10n_util::GetStringUTF16(IDS_BOOKMARK_BAR_IMPORT_LINK));
  42     // We don't want the link to alter tab navigation.
  43     import_link_->SetFocusable(false);
  44     import_link_->set_listener(this);
  45     import_link_->set_context_menu_controller(this);
  46     import_link_->SetAutoColorReadabilityEnabled(false);
  47     AddChildView(import_link_);
  48   }
  49 }
  50
  51 gfx::Size BookmarkBarInstructionsView::GetPreferredSize() const {
  52   int ascent = 0, descent = 0, height = 0, width = 0;
  53   for (int i = 0; i < child_count(); ++i) {
  54     const views::View* view = child_at(i);
  55     gfx::Size pref = view->GetPreferredSize();
  56     int baseline = view->GetBaseline();
  57     if (baseline != -1) {
  58       ascent = std::max(ascent, baseline);
  59       descent = std::max(descent, pref.height() - baseline);
  60     } else {
  61       height = std::max(pref.height(), height);
  62     }
  63     width += pref.width();
  64   }
  65   width += (child_count() - 1) * kViewPadding;
  66   if (ascent != 0)
  67     height = std::max(ascent + descent, height);
  68   return gfx::Size(width, height);
  69 }
  70
  71 void BookmarkBarInstructionsView::Layout() {
  72   int remaining_width = width();
  73   int x = 0;
  74   for (int i = 0; i < child_count(); ++i) {
  75     views::View* view = child_at(i);
  76     gfx::Size pref = view->GetPreferredSize();
  77     int baseline = view->GetBaseline();
  78     int y;
  79     if (baseline != -1 && baseline_ != -1)
  80       y = baseline_ - baseline;
  81     else
  82       y = (height() - pref.height()) / 2;
  83     int view_width = std::min(remaining_width, pref.width());
  84     view->SetBounds(x, y, view_width, pref.height());
  85     x += view_width + kViewPadding;
  86     remaining_width = std::max(0, width() - x);
  87   }
  88 }
  89
  90 void BookmarkBarInstructionsView::OnThemeChanged() {
  91   UpdateColors();
  92 }
  93
  94 void BookmarkBarInstructionsView::ViewHierarchyChanged(
  95     const ViewHierarchyChangedDetails& details) {
  96   if (!updated_colors_ && details.is_add && GetWidget())
  97     UpdateColors();
  98 }
  99
 100 void BookmarkBarInstructionsView::GetAccessibleState(
 101     ui::AXViewState* state) {
 102   state->role = ui::AX_ROLE_GROUP;
 103 }
 104
 105 void BookmarkBarInstructionsView::LinkClicked(views::Link* source,
 106                                               int event_flags) {
 107   delegate_->ShowImportDialog();
 108 }
 109
 110 void BookmarkBarInstructionsView::ShowContextMenuForView(
 111     views::View* source,
 112     const gfx::Point& point,
 113     ui::MenuSourceType source_type) {
 114   // Do nothing here, we don't want to show the Bookmarks context menu when
 115   // the user right clicks on the "Import bookmarks now" link.
 116 }
 117
 118 void BookmarkBarInstructionsView::UpdateColors() {
 119   // We don't always have a theme provider (ui tests, for example).
 120   const ui::ThemeProvider* theme_provider = GetThemeProvider();
 121   if (!theme_provider)
 122     return;
 123   updated_colors_ = true;
 124   SkColor text_color =
 125       theme_provider->GetColor(ThemeProperties::COLOR_BOOKMARK_TEXT);
 126   instructions_->SetEnabledColor(text_color);
 127   if (import_link_)
 128     import_link_->SetEnabledColor(text_color);
 129 }