1 // Copyright 2013 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/prefix_selector.h" 6 7 #include "base/i18n/case_conversion.h" 8 #include "ui/base/ime/text_input_type.h" 9 #include "ui/base/range/range.h" 10 #include "ui/views/controls/prefix_delegate.h" 11 #include "ui/views/widget/widget.h" 12 13 namespace views { 14 15 namespace { 16 17 const int64 kTimeBeforeClearingMS = 1000; 18 19 void ConvertRectToScreen(const views::View* src, gfx::Rect* r) { 20 DCHECK(src); 21 22 gfx::Point new_origin = r->origin(); 23 views::View::ConvertPointToScreen(src, &new_origin); 24 r->set_origin(new_origin); 25 } 26 27 } // namespace 28 29 PrefixSelector::PrefixSelector(PrefixDelegate* delegate) 30 : prefix_delegate_(delegate) { 31 } 32 33 PrefixSelector::~PrefixSelector() { 34 } 35 36 void PrefixSelector::OnViewBlur() { 37 ClearText(); 38 } 39 40 void PrefixSelector::SetCompositionText( 41 const ui::CompositionText& composition) { 42 } 43 44 void PrefixSelector::ConfirmCompositionText() { 45 } 46 47 void PrefixSelector::ClearCompositionText() { 48 } 49 50 void PrefixSelector::InsertText(const string16& text) { 51 OnTextInput(text); 52 } 53 54 void PrefixSelector::InsertChar(char16 ch, int flags) { 55 OnTextInput(string16(1, ch)); 56 } 57 58 gfx::NativeWindow PrefixSelector::GetAttachedWindow() const { 59 return prefix_delegate_->GetWidget()->GetNativeWindow(); 60 } 61 62 ui::TextInputType PrefixSelector::GetTextInputType() const { 63 return ui::TEXT_INPUT_TYPE_TEXT; 64 } 65 66 ui::TextInputMode PrefixSelector::GetTextInputMode() const { 67 return ui::TEXT_INPUT_MODE_DEFAULT; 68 } 69 70 bool PrefixSelector::CanComposeInline() const { 71 return false; 72 } 73 74 gfx::Rect PrefixSelector::GetCaretBounds() { 75 gfx::Rect rect(prefix_delegate_->GetVisibleBounds().origin(), gfx::Size()); 76 // TextInputClient::GetCaretBounds is expected to return a value in screen 77 // coordinates. 78 ConvertRectToScreen(prefix_delegate_, &rect); 79 return rect; 80 } 81 82 bool PrefixSelector::GetCompositionCharacterBounds(uint32 index, 83 gfx::Rect* rect) { 84 // TextInputClient::GetCompositionCharacterBounds is expected to fill |rect| 85 // in screen coordinates and GetCaretBounds returns screen coordinates. 86 *rect = GetCaretBounds(); 87 return false; 88 } 89 90 bool PrefixSelector::HasCompositionText() { 91 return false; 92 } 93 94 bool PrefixSelector::GetTextRange(ui::Range* range) { 95 *range = ui::Range(); 96 return false; 97 } 98 99 bool PrefixSelector::GetCompositionTextRange(ui::Range* range) { 100 *range = ui::Range(); 101 return false; 102 } 103 104 bool PrefixSelector::GetSelectionRange(ui::Range* range) { 105 *range = ui::Range(); 106 return false; 107 } 108 109 bool PrefixSelector::SetSelectionRange(const ui::Range& range) { 110 return false; 111 } 112 113 bool PrefixSelector::DeleteRange(const ui::Range& range) { 114 return false; 115 } 116 117 bool PrefixSelector::GetTextFromRange(const ui::Range& range, 118 string16* text) { 119 return false; 120 } 121 122 void PrefixSelector::OnInputMethodChanged() { 123 ClearText(); 124 } 125 126 bool PrefixSelector::ChangeTextDirectionAndLayoutAlignment( 127 base::i18n::TextDirection direction) { 128 return true; 129 } 130 131 void PrefixSelector::ExtendSelectionAndDelete(size_t before, size_t after) { 132 } 133 134 void PrefixSelector::EnsureCaretInRect(const gfx::Rect& rect) { 135 } 136 137 void PrefixSelector::OnTextInput(const string16& text) { 138 // Small hack to filter out 'tab' input, as the expectation is that tabs 139 // should cycle input elements, not influence selection. 140 if (text.length() == 1 && text.at(0) == 0x09) 141 return; 142 143 const int row_count = prefix_delegate_->GetRowCount(); 144 if (row_count == 0) 145 return; 146 147 // Search for |text| if it has been a while since the user typed, otherwise 148 // append |text| to |current_text_| and search for that. If it has been a 149 // while search after the current row, otherwise search starting from the 150 // current row. 151 int row = std::max(0, prefix_delegate_->GetSelectedRow()); 152 const base::TimeTicks now(base::TimeTicks::Now()); 153 if ((now - time_of_last_key_).InMilliseconds() < kTimeBeforeClearingMS) { 154 current_text_ += text; 155 } else { 156 current_text_ = text; 157 if (prefix_delegate_->GetSelectedRow() >= 0) 158 row = (row + 1) % row_count; 159 } 160 time_of_last_key_ = now; 161 162 const int start_row = row; 163 const string16 lower_text(base::i18n::ToLower(current_text_)); 164 do { 165 if (TextAtRowMatchesText(row, current_text_)) { 166 prefix_delegate_->SetSelectedRow(row); 167 return; 168 } 169 row = (row + 1) % row_count; 170 } while (row != start_row); 171 } 172 173 bool PrefixSelector::TextAtRowMatchesText(int row, 174 const string16& lower_text) { 175 const string16 model_text( 176 base::i18n::ToLower(prefix_delegate_->GetTextForRow(row))); 177 return (model_text.size() >= lower_text.size()) && 178 (model_text.compare(0, lower_text.size(), lower_text) == 0); 179 } 180 181 void PrefixSelector::ClearText() { 182 current_text_.clear(); 183 time_of_last_key_ = base::TimeTicks(); 184 } 185 186 } // namespace views 187
