| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/views/controls/prefix_selector.h" |
| |
| #include "base/i18n/case_conversion.h" |
| #include "ui/base/ime/text_input_type.h" |
| #include "ui/base/range/range.h" |
| #include "ui/views/controls/prefix_delegate.h" |
| #include "ui/views/widget/widget.h" |
| |
| namespace views { |
| |
| namespace { |
| |
| const int64 kTimeBeforeClearingMS = 1000; |
| |
| void ConvertRectToScreen(const views::View* src, gfx::Rect* r) { |
| DCHECK(src); |
| |
| gfx::Point new_origin = r->origin(); |
| views::View::ConvertPointToScreen(src, &new_origin); |
| r->set_origin(new_origin); |
| } |
| |
| } // namespace |
| |
| PrefixSelector::PrefixSelector(PrefixDelegate* delegate) |
| : prefix_delegate_(delegate) { |
| } |
| |
| PrefixSelector::~PrefixSelector() { |
| } |
| |
| void PrefixSelector::OnViewBlur() { |
| ClearText(); |
| } |
| |
| void PrefixSelector::SetCompositionText( |
| const ui::CompositionText& composition) { |
| } |
| |
| void PrefixSelector::ConfirmCompositionText() { |
| } |
| |
| void PrefixSelector::ClearCompositionText() { |
| } |
| |
| void PrefixSelector::InsertText(const string16& text) { |
| OnTextInput(text); |
| } |
| |
| void PrefixSelector::InsertChar(char16 ch, int flags) { |
| OnTextInput(string16(1, ch)); |
| } |
| |
| gfx::NativeWindow PrefixSelector::GetAttachedWindow() const { |
| return prefix_delegate_->GetWidget()->GetNativeWindow(); |
| } |
| |
| ui::TextInputType PrefixSelector::GetTextInputType() const { |
| return ui::TEXT_INPUT_TYPE_TEXT; |
| } |
| |
| ui::TextInputMode PrefixSelector::GetTextInputMode() const { |
| return ui::TEXT_INPUT_MODE_DEFAULT; |
| } |
| |
| bool PrefixSelector::CanComposeInline() const { |
| return false; |
| } |
| |
| gfx::Rect PrefixSelector::GetCaretBounds() { |
| gfx::Rect rect(prefix_delegate_->GetVisibleBounds().origin(), gfx::Size()); |
| // TextInputClient::GetCaretBounds is expected to return a value in screen |
| // coordinates. |
| ConvertRectToScreen(prefix_delegate_, &rect); |
| return rect; |
| } |
| |
| bool PrefixSelector::GetCompositionCharacterBounds(uint32 index, |
| gfx::Rect* rect) { |
| // TextInputClient::GetCompositionCharacterBounds is expected to fill |rect| |
| // in screen coordinates and GetCaretBounds returns screen coordinates. |
| *rect = GetCaretBounds(); |
| return false; |
| } |
| |
| bool PrefixSelector::HasCompositionText() { |
| return false; |
| } |
| |
| bool PrefixSelector::GetTextRange(ui::Range* range) { |
| *range = ui::Range(); |
| return false; |
| } |
| |
| bool PrefixSelector::GetCompositionTextRange(ui::Range* range) { |
| *range = ui::Range(); |
| return false; |
| } |
| |
| bool PrefixSelector::GetSelectionRange(ui::Range* range) { |
| *range = ui::Range(); |
| return false; |
| } |
| |
| bool PrefixSelector::SetSelectionRange(const ui::Range& range) { |
| return false; |
| } |
| |
| bool PrefixSelector::DeleteRange(const ui::Range& range) { |
| return false; |
| } |
| |
| bool PrefixSelector::GetTextFromRange(const ui::Range& range, |
| string16* text) { |
| return false; |
| } |
| |
| void PrefixSelector::OnInputMethodChanged() { |
| ClearText(); |
| } |
| |
| bool PrefixSelector::ChangeTextDirectionAndLayoutAlignment( |
| base::i18n::TextDirection direction) { |
| return true; |
| } |
| |
| void PrefixSelector::ExtendSelectionAndDelete(size_t before, size_t after) { |
| } |
| |
| void PrefixSelector::EnsureCaretInRect(const gfx::Rect& rect) { |
| } |
| |
| void PrefixSelector::OnTextInput(const string16& text) { |
| // Small hack to filter out 'tab' input, as the expectation is that tabs |
| // should cycle input elements, not influence selection. |
| if (text.length() == 1 && text.at(0) == 0x09) |
| return; |
| |
| const int row_count = prefix_delegate_->GetRowCount(); |
| if (row_count == 0) |
| return; |
| |
| // Search for |text| if it has been a while since the user typed, otherwise |
| // append |text| to |current_text_| and search for that. If it has been a |
| // while search after the current row, otherwise search starting from the |
| // current row. |
| int row = std::max(0, prefix_delegate_->GetSelectedRow()); |
| const base::TimeTicks now(base::TimeTicks::Now()); |
| if ((now - time_of_last_key_).InMilliseconds() < kTimeBeforeClearingMS) { |
| current_text_ += text; |
| } else { |
| current_text_ = text; |
| if (prefix_delegate_->GetSelectedRow() >= 0) |
| row = (row + 1) % row_count; |
| } |
| time_of_last_key_ = now; |
| |
| const int start_row = row; |
| const string16 lower_text(base::i18n::ToLower(current_text_)); |
| do { |
| if (TextAtRowMatchesText(row, current_text_)) { |
| prefix_delegate_->SetSelectedRow(row); |
| return; |
| } |
| row = (row + 1) % row_count; |
| } while (row != start_row); |
| } |
| |
| bool PrefixSelector::TextAtRowMatchesText(int row, |
| const string16& lower_text) { |
| const string16 model_text( |
| base::i18n::ToLower(prefix_delegate_->GetTextForRow(row))); |
| return (model_text.size() >= lower_text.size()) && |
| (model_text.compare(0, lower_text.size(), lower_text) == 0); |
| } |
| |
| void PrefixSelector::ClearText() { |
| current_text_.clear(); |
| time_of_last_key_ = base::TimeTicks(); |
| } |
| |
| } // namespace views |