| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/gtk/gtk_key_bindings_handler.h" |
| |
| #include <cstddef> |
| #include <string> |
| |
| #include "base/logging.h" |
| #include "base/strings/string_util.h" |
| #include "ui/base/glib/glib_cast.h" |
| #include "ui/base/ime/text_edit_commands.h" |
| #include "ui/events/event.h" |
| #include "ui/gtk/gtk_compat.h" |
| #include "ui/gtk/gtk_util.h" |
| |
| using ui::TextEditCommand; |
| |
| namespace gtk { |
| |
| GtkKeyBindingsHandler::GtkKeyBindingsHandler() |
| : fake_window_(gtk_offscreen_window_new()), handler_(CreateNewHandler()) { |
| DCHECK(!GtkCheckVersion(4)); |
| gtk_container_add( |
| GlibCast<GtkContainer>(fake_window_, gtk_container_get_type()), handler_); |
| } |
| |
| GtkKeyBindingsHandler::~GtkKeyBindingsHandler() { |
| gtk_widget_destroy(handler_); |
| gtk_widget_destroy(fake_window_); |
| } |
| |
| bool GtkKeyBindingsHandler::MatchEvent( |
| const ui::Event& event, |
| std::vector<ui::TextEditCommandAuraLinux>* edit_commands) { |
| CHECK(event.IsKeyEvent()); |
| |
| const ui::KeyEvent& key_event = static_cast<const ui::KeyEvent&>(event); |
| if (key_event.is_char()) |
| return false; |
| |
| GdkEvent* gdk_event = GdkEventFromKeyEvent(key_event); |
| if (!gdk_event) |
| return false; |
| |
| edit_commands_.clear(); |
| // If this key event matches a predefined key binding, corresponding signal |
| // will be emitted. |
| |
| auto* key = reinterpret_cast<GdkEventKey*>(gdk_event); |
| DCHECK(key->type == GdkKeyPress() || key->type == GdkKeyRelease()); |
| gtk_bindings_activate_event(G_OBJECT(handler_), key); |
| gdk_event_free(gdk_event); |
| |
| bool matched = !edit_commands_.empty(); |
| if (edit_commands) |
| edit_commands->swap(edit_commands_); |
| return matched; |
| } |
| |
| GtkWidget* GtkKeyBindingsHandler::CreateNewHandler() { |
| Handler* handler = |
| static_cast<Handler*>(g_object_new(HandlerGetType(), nullptr)); |
| |
| handler->owner = this; |
| |
| // We don't need to show the |handler| object on screen, so set its size to |
| // zero. |
| gtk_widget_set_size_request(GTK_WIDGET(handler), 0, 0); |
| |
| // Prevents it from handling any events by itself. |
| gtk_widget_set_sensitive(GTK_WIDGET(handler), FALSE); |
| gtk_widget_set_events(GTK_WIDGET(handler), 0); |
| gtk_widget_set_can_focus(GTK_WIDGET(handler), TRUE); |
| |
| return GTK_WIDGET(handler); |
| } |
| |
| void GtkKeyBindingsHandler::EditCommandMatched(TextEditCommand command, |
| const std::string& value) { |
| edit_commands_.emplace_back(command, value); |
| } |
| |
| void GtkKeyBindingsHandler::HandlerInit(Handler* self) { |
| self->owner = nullptr; |
| } |
| |
| void GtkKeyBindingsHandler::HandlerClassInit(HandlerClass* klass) { |
| // Overrides all virtual methods related to editor key bindings. |
| klass->backspace = BackSpace; |
| klass->copy_clipboard = CopyClipboard; |
| klass->cut_clipboard = CutClipboard; |
| klass->delete_from_cursor = DeleteFromCursor; |
| klass->insert_at_cursor = InsertAtCursor; |
| klass->move_cursor = MoveCursor; |
| klass->paste_clipboard = PasteClipboard; |
| klass->set_anchor = SetAnchor; |
| klass->toggle_overwrite = ToggleOverwrite; |
| |
| // "move-focus", "move-viewport", "select-all" and "toggle-cursor-visible" |
| // have no corresponding virtual methods. Since glib 2.18 (gtk 2.14), |
| // g_signal_override_class_handler() is introduced to override a signal |
| // handler. |
| g_signal_override_class_handler("move-focus", G_TYPE_FROM_CLASS(klass), |
| G_CALLBACK(MoveFocus)); |
| |
| g_signal_override_class_handler("move-viewport", G_TYPE_FROM_CLASS(klass), |
| G_CALLBACK(MoveViewport)); |
| |
| g_signal_override_class_handler("select-all", G_TYPE_FROM_CLASS(klass), |
| G_CALLBACK(SelectAll)); |
| |
| g_signal_override_class_handler("toggle-cursor-visible", |
| G_TYPE_FROM_CLASS(klass), |
| G_CALLBACK(ToggleCursorVisible)); |
| |
| g_signal_override_class_handler("show-help", G_TYPE_FROM_CLASS(klass), |
| G_CALLBACK(ShowHelp)); |
| } |
| |
| GType GtkKeyBindingsHandler::HandlerGetType() { |
| static gsize type_id = 0; |
| if (g_once_init_enter(&type_id)) { |
| GType type = g_type_register_static_simple( |
| GTK_TYPE_TEXT_VIEW, g_intern_static_string("GtkKeyBindingsHandler"), |
| sizeof(HandlerClass), |
| reinterpret_cast<GClassInitFunc>(HandlerClassInit), sizeof(Handler), |
| reinterpret_cast<GInstanceInitFunc>(HandlerInit), |
| static_cast<GTypeFlags>(0)); |
| g_once_init_leave(&type_id, type); |
| } |
| return type_id; |
| } |
| |
| GtkKeyBindingsHandler* GtkKeyBindingsHandler::GetHandlerOwner( |
| GtkTextView* text_view) { |
| Handler* handler = |
| G_TYPE_CHECK_INSTANCE_CAST(text_view, HandlerGetType(), Handler); |
| DCHECK(handler); |
| return handler->owner; |
| } |
| |
| void GtkKeyBindingsHandler::BackSpace(GtkTextView* text_view) { |
| GetHandlerOwner(text_view)->EditCommandMatched( |
| TextEditCommand::DELETE_BACKWARD, std::string()); |
| } |
| |
| void GtkKeyBindingsHandler::CopyClipboard(GtkTextView* text_view) { |
| GetHandlerOwner(text_view)->EditCommandMatched(TextEditCommand::COPY, |
| std::string()); |
| } |
| |
| void GtkKeyBindingsHandler::CutClipboard(GtkTextView* text_view) { |
| GetHandlerOwner(text_view)->EditCommandMatched(TextEditCommand::CUT, |
| std::string()); |
| } |
| |
| void GtkKeyBindingsHandler::DeleteFromCursor(GtkTextView* text_view, |
| GtkDeleteType type, |
| gint count) { |
| if (!count) |
| return; |
| |
| TextEditCommand commands[2] = { |
| TextEditCommand::INVALID_COMMAND, |
| TextEditCommand::INVALID_COMMAND, |
| }; |
| switch (type) { |
| case GTK_DELETE_CHARS: |
| commands[0] = (count > 0 ? TextEditCommand::DELETE_FORWARD |
| : TextEditCommand::DELETE_BACKWARD); |
| break; |
| case GTK_DELETE_WORD_ENDS: |
| commands[0] = (count > 0 ? TextEditCommand::DELETE_WORD_FORWARD |
| : TextEditCommand::DELETE_WORD_BACKWARD); |
| break; |
| case GTK_DELETE_WORDS: |
| if (count > 0) { |
| commands[0] = TextEditCommand::MOVE_WORD_FORWARD; |
| commands[1] = TextEditCommand::DELETE_WORD_BACKWARD; |
| } else { |
| commands[0] = TextEditCommand::MOVE_WORD_BACKWARD; |
| commands[1] = TextEditCommand::DELETE_WORD_FORWARD; |
| } |
| break; |
| case GTK_DELETE_DISPLAY_LINES: |
| commands[0] = TextEditCommand::MOVE_TO_BEGINNING_OF_LINE; |
| commands[1] = TextEditCommand::DELETE_TO_END_OF_LINE; |
| break; |
| case GTK_DELETE_DISPLAY_LINE_ENDS: |
| commands[0] = (count > 0 ? TextEditCommand::DELETE_TO_END_OF_LINE |
| : TextEditCommand::DELETE_TO_BEGINNING_OF_LINE); |
| break; |
| case GTK_DELETE_PARAGRAPH_ENDS: |
| commands[0] = |
| (count > 0 ? TextEditCommand::DELETE_TO_END_OF_PARAGRAPH |
| : TextEditCommand::DELETE_TO_BEGINNING_OF_PARAGRAPH); |
| break; |
| case GTK_DELETE_PARAGRAPHS: |
| commands[0] = TextEditCommand::MOVE_TO_BEGINNING_OF_PARAGRAPH; |
| commands[1] = TextEditCommand::DELETE_TO_END_OF_PARAGRAPH; |
| break; |
| default: |
| // GTK_DELETE_WHITESPACE has no corresponding editor command. |
| return; |
| } |
| |
| GtkKeyBindingsHandler* owner = GetHandlerOwner(text_view); |
| if (count < 0) |
| count = -count; |
| for (; count > 0; --count) { |
| for (auto& command : commands) { |
| if (command != TextEditCommand::INVALID_COMMAND) |
| owner->EditCommandMatched(command, std::string()); |
| } |
| } |
| } |
| |
| void GtkKeyBindingsHandler::InsertAtCursor(GtkTextView* text_view, |
| const gchar* str) { |
| if (str && *str) { |
| GetHandlerOwner(text_view)->EditCommandMatched(TextEditCommand::INSERT_TEXT, |
| str); |
| } |
| } |
| |
| void GtkKeyBindingsHandler::MoveCursor(GtkTextView* text_view, |
| GtkMovementStep step, |
| gint count, |
| gboolean extend_selection) { |
| if (!count) |
| return; |
| |
| TextEditCommand command; |
| switch (step) { |
| case GTK_MOVEMENT_LOGICAL_POSITIONS: |
| if (extend_selection) { |
| command = |
| (count > 0 ? TextEditCommand::MOVE_FORWARD_AND_MODIFY_SELECTION |
| : TextEditCommand::MOVE_BACKWARD_AND_MODIFY_SELECTION); |
| } else { |
| command = (count > 0 ? TextEditCommand::MOVE_FORWARD |
| : TextEditCommand::MOVE_BACKWARD); |
| } |
| break; |
| case GTK_MOVEMENT_VISUAL_POSITIONS: |
| if (extend_selection) { |
| command = (count > 0 ? TextEditCommand::MOVE_RIGHT_AND_MODIFY_SELECTION |
| : TextEditCommand::MOVE_LEFT_AND_MODIFY_SELECTION); |
| } else { |
| command = (count > 0 ? TextEditCommand::MOVE_RIGHT |
| : TextEditCommand::MOVE_LEFT); |
| } |
| break; |
| case GTK_MOVEMENT_WORDS: |
| if (extend_selection) { |
| command = |
| (count > 0 ? TextEditCommand::MOVE_WORD_RIGHT_AND_MODIFY_SELECTION |
| : TextEditCommand::MOVE_WORD_LEFT_AND_MODIFY_SELECTION); |
| } else { |
| command = (count > 0 ? TextEditCommand::MOVE_WORD_RIGHT |
| : TextEditCommand::MOVE_WORD_LEFT); |
| } |
| break; |
| case GTK_MOVEMENT_DISPLAY_LINES: |
| if (extend_selection) { |
| command = (count > 0 ? TextEditCommand::MOVE_DOWN_AND_MODIFY_SELECTION |
| : TextEditCommand::MOVE_UP_AND_MODIFY_SELECTION); |
| } else { |
| command = |
| (count > 0 ? TextEditCommand::MOVE_DOWN : TextEditCommand::MOVE_UP); |
| } |
| break; |
| case GTK_MOVEMENT_DISPLAY_LINE_ENDS: |
| if (extend_selection) { |
| command = |
| (count > 0 |
| ? TextEditCommand::MOVE_TO_END_OF_LINE_AND_MODIFY_SELECTION |
| : TextEditCommand:: |
| MOVE_TO_BEGINNING_OF_LINE_AND_MODIFY_SELECTION); |
| } else { |
| command = (count > 0 ? TextEditCommand::MOVE_TO_END_OF_LINE |
| : TextEditCommand::MOVE_TO_BEGINNING_OF_LINE); |
| } |
| break; |
| case GTK_MOVEMENT_PARAGRAPH_ENDS: |
| if (extend_selection) { |
| command = |
| (count > 0 |
| ? TextEditCommand:: |
| MOVE_TO_END_OF_PARAGRAPH_AND_MODIFY_SELECTION |
| : TextEditCommand:: |
| MOVE_TO_BEGINNING_OF_PARAGRAPH_AND_MODIFY_SELECTION); |
| } else { |
| command = (count > 0 ? TextEditCommand::MOVE_TO_END_OF_PARAGRAPH |
| : TextEditCommand::MOVE_TO_BEGINNING_OF_PARAGRAPH); |
| } |
| break; |
| case GTK_MOVEMENT_PAGES: |
| if (extend_selection) { |
| command = |
| (count > 0 ? TextEditCommand::MOVE_PAGE_DOWN_AND_MODIFY_SELECTION |
| : TextEditCommand::MOVE_PAGE_UP_AND_MODIFY_SELECTION); |
| } else { |
| command = (count > 0 ? TextEditCommand::MOVE_PAGE_DOWN |
| : TextEditCommand::MOVE_PAGE_UP); |
| } |
| break; |
| case GTK_MOVEMENT_BUFFER_ENDS: |
| if (extend_selection) { |
| command = |
| (count > 0 |
| ? TextEditCommand::MOVE_TO_END_OF_DOCUMENT_AND_MODIFY_SELECTION |
| : TextEditCommand:: |
| MOVE_TO_BEGINNING_OF_DOCUMENT_AND_MODIFY_SELECTION); |
| } else { |
| command = (count > 0 ? TextEditCommand::MOVE_TO_END_OF_DOCUMENT |
| : TextEditCommand::MOVE_TO_BEGINNING_OF_DOCUMENT); |
| } |
| break; |
| default: |
| // GTK_MOVEMENT_PARAGRAPHS and GTK_MOVEMENT_HORIZONTAL_PAGES have |
| // no corresponding editor commands. |
| return; |
| } |
| |
| GtkKeyBindingsHandler* owner = GetHandlerOwner(text_view); |
| if (count < 0) |
| count = -count; |
| for (; count > 0; --count) |
| owner->EditCommandMatched(command, std::string()); |
| } |
| |
| void GtkKeyBindingsHandler::MoveViewport(GtkTextView* text_view, |
| GtkScrollStep step, |
| gint count) { |
| // Not supported by Blink. |
| } |
| |
| void GtkKeyBindingsHandler::PasteClipboard(GtkTextView* text_view) { |
| GetHandlerOwner(text_view)->EditCommandMatched(TextEditCommand::PASTE, |
| std::string()); |
| } |
| |
| void GtkKeyBindingsHandler::SelectAll(GtkTextView* text_view, gboolean select) { |
| GetHandlerOwner(text_view)->EditCommandMatched( |
| select ? TextEditCommand::SELECT_ALL : TextEditCommand::UNSELECT, |
| std::string()); |
| } |
| |
| void GtkKeyBindingsHandler::SetAnchor(GtkTextView* text_view) { |
| GetHandlerOwner(text_view)->EditCommandMatched(TextEditCommand::SET_MARK, |
| std::string()); |
| } |
| |
| void GtkKeyBindingsHandler::ToggleCursorVisible(GtkTextView* text_view) { |
| // Not supported by Blink. |
| } |
| |
| void GtkKeyBindingsHandler::ToggleOverwrite(GtkTextView* text_view) { |
| // Not supported by Blink. |
| } |
| |
| gboolean GtkKeyBindingsHandler::ShowHelp(GtkWidget* widget, |
| GtkWidgetHelpType arg1) { |
| // Just for disabling the default handler. |
| return TRUE; |
| } |
| |
| void GtkKeyBindingsHandler::MoveFocus(GtkWidget* widget, |
| GtkDirectionType arg1) { |
| // Just for disabling the default handler. |
| } |
| |
| } // namespace gtk |
