bookmark_bar_instructions_view.cc revision 5d1f7b1de12d16ceb2c938c56701a3e8bfa558f7 
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/base/accessibility/accessible_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
20namespace {
21
22// Horizontal padding, in pixels, between the link and label.
23const int kViewPadding = 6;
24
25}  // namespace
26
27BookmarkBarInstructionsView::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
51gfx::Size BookmarkBarInstructionsView::GetPreferredSize() {
52  int ascent = 0, descent = 0, height = 0, width = 0;
53  for (int i = 0; i < child_count(); ++i) {
54    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
71void 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
90void BookmarkBarInstructionsView::OnThemeChanged() {
91  UpdateColors();
92}
93
94void BookmarkBarInstructionsView::ViewHierarchyChanged(
95    const ViewHierarchyChangedDetails& details) {
96  if (!updated_colors_ && details.is_add && GetWidget())
97    UpdateColors();
98}
99
100void BookmarkBarInstructionsView::GetAccessibleState(
101    ui::AccessibleViewState* state) {
102  state->role = ui::AccessibilityTypes::ROLE_GROUPING;
103}
104
105void BookmarkBarInstructionsView::LinkClicked(views::Link* source,
106                                              int event_flags) {
107  delegate_->ShowImportDialog();
108}
109
110void 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
118void 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}
130