375 lines
12 KiB
C++
375 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/MathAlgorithms.h"
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#include "mozilla/TextEvents.h"
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#include "NativeKeyBindings.h"
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#include "nsString.h"
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#include "nsMemory.h"
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#include "nsGtkKeyUtils.h"
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#include <gtk/gtk.h>
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#include <gdk/gdkkeysyms.h>
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#include <gdk/gdk.h>
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namespace mozilla {
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namespace widget {
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static nsIWidget::DoCommandCallback gCurrentCallback;
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static void *gCurrentCallbackData;
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static bool gHandled;
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// Common GtkEntry and GtkTextView signals
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static void
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copy_clipboard_cb(GtkWidget *w, gpointer user_data)
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{
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gCurrentCallback(CommandCopy, gCurrentCallbackData);
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g_signal_stop_emission_by_name(w, "copy_clipboard");
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gHandled = true;
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}
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static void
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cut_clipboard_cb(GtkWidget *w, gpointer user_data)
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{
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gCurrentCallback(CommandCut, gCurrentCallbackData);
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g_signal_stop_emission_by_name(w, "cut_clipboard");
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gHandled = true;
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}
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// GTK distinguishes between display lines (wrapped, as they appear on the
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// screen) and paragraphs, which are runs of text terminated by a newline.
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// We don't have this distinction, so we always use editor's notion of
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// lines, which are newline-terminated.
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static const Command sDeleteCommands[][2] = {
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// backward, forward
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{ CommandDeleteCharBackward, CommandDeleteCharForward }, // CHARS
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{ CommandDeleteWordBackward, CommandDeleteWordForward }, // WORD_ENDS
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{ CommandDeleteWordBackward, CommandDeleteWordForward }, // WORDS
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{ CommandDeleteToBeginningOfLine, CommandDeleteToEndOfLine }, // LINES
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{ CommandDeleteToBeginningOfLine, CommandDeleteToEndOfLine }, // LINE_ENDS
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{ CommandDeleteToBeginningOfLine, CommandDeleteToEndOfLine }, // PARAGRAPH_ENDS
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{ CommandDeleteToBeginningOfLine, CommandDeleteToEndOfLine }, // PARAGRAPHS
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// This deletes from the end of the previous word to the beginning of the
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// next word, but only if the caret is not in a word.
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// XXX need to implement in editor
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{ CommandDoNothing, CommandDoNothing } // WHITESPACE
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};
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static void
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delete_from_cursor_cb(GtkWidget *w, GtkDeleteType del_type,
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gint count, gpointer user_data)
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{
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g_signal_stop_emission_by_name(w, "delete_from_cursor");
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bool forward = count > 0;
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#if (MOZ_WIDGET_GTK == 3)
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// Ignore GTK's Ctrl-K keybinding introduced in GTK 3.14 and removed in
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// 3.18 if the user has custom bindings set. See bug 1176929.
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if (del_type == GTK_DELETE_PARAGRAPH_ENDS && forward && GTK_IS_ENTRY(w) &&
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!gtk_check_version(3, 14, 1) && gtk_check_version(3, 17, 9)) {
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GtkStyleContext* context = gtk_widget_get_style_context(w);
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GtkStateFlags flags = gtk_widget_get_state_flags(w);
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GPtrArray* array;
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gtk_style_context_get(context, flags, "gtk-key-bindings", &array, nullptr);
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if (!array)
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return;
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g_ptr_array_unref(array);
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}
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#endif
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gHandled = true;
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if (uint32_t(del_type) >= ArrayLength(sDeleteCommands)) {
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// unsupported deletion type
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return;
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}
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if (del_type == GTK_DELETE_WORDS) {
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// This works like word_ends, except we first move the caret to the
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// beginning/end of the current word.
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if (forward) {
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gCurrentCallback(CommandWordNext, gCurrentCallbackData);
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gCurrentCallback(CommandWordPrevious, gCurrentCallbackData);
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} else {
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gCurrentCallback(CommandWordPrevious, gCurrentCallbackData);
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gCurrentCallback(CommandWordNext, gCurrentCallbackData);
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}
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} else if (del_type == GTK_DELETE_DISPLAY_LINES ||
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del_type == GTK_DELETE_PARAGRAPHS) {
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// This works like display_line_ends, except we first move the caret to the
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// beginning/end of the current line.
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if (forward) {
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gCurrentCallback(CommandBeginLine, gCurrentCallbackData);
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} else {
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gCurrentCallback(CommandEndLine, gCurrentCallbackData);
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}
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}
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Command command = sDeleteCommands[del_type][forward];
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if (!command) {
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return; // unsupported command
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}
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unsigned int absCount = Abs(count);
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for (unsigned int i = 0; i < absCount; ++i) {
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gCurrentCallback(command, gCurrentCallbackData);
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}
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}
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static const Command sMoveCommands[][2][2] = {
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// non-extend { backward, forward }, extend { backward, forward }
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// GTK differentiates between logical position, which is prev/next,
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// and visual position, which is always left/right.
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// We should fix this to work the same way for RTL text input.
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{ // LOGICAL_POSITIONS
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{ CommandCharPrevious, CommandCharNext },
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{ CommandSelectCharPrevious, CommandSelectCharNext }
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},
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{ // VISUAL_POSITIONS
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{ CommandCharPrevious, CommandCharNext },
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{ CommandSelectCharPrevious, CommandSelectCharNext }
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},
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{ // WORDS
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{ CommandWordPrevious, CommandWordNext },
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{ CommandSelectWordPrevious, CommandSelectWordNext }
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},
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{ // DISPLAY_LINES
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{ CommandLinePrevious, CommandLineNext },
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{ CommandSelectLinePrevious, CommandSelectLineNext }
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},
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{ // DISPLAY_LINE_ENDS
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{ CommandBeginLine, CommandEndLine },
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{ CommandSelectBeginLine, CommandSelectEndLine }
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},
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{ // PARAGRAPHS
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{ CommandLinePrevious, CommandLineNext },
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{ CommandSelectLinePrevious, CommandSelectLineNext }
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},
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{ // PARAGRAPH_ENDS
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{ CommandBeginLine, CommandEndLine },
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{ CommandSelectBeginLine, CommandSelectEndLine }
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},
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{ // PAGES
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{ CommandMovePageUp, CommandMovePageDown },
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{ CommandSelectPageUp, CommandSelectPageDown }
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},
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{ // BUFFER_ENDS
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{ CommandMoveTop, CommandMoveBottom },
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{ CommandSelectTop, CommandSelectBottom }
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},
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{ // HORIZONTAL_PAGES (unsupported)
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{ CommandDoNothing, CommandDoNothing },
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{ CommandDoNothing, CommandDoNothing }
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}
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};
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static void
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move_cursor_cb(GtkWidget *w, GtkMovementStep step, gint count,
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gboolean extend_selection, gpointer user_data)
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{
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g_signal_stop_emission_by_name(w, "move_cursor");
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gHandled = true;
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bool forward = count > 0;
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if (uint32_t(step) >= ArrayLength(sMoveCommands)) {
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// unsupported movement type
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return;
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}
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Command command = sMoveCommands[step][extend_selection][forward];
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if (!command) {
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return; // unsupported command
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}
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unsigned int absCount = Abs(count);
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for (unsigned int i = 0; i < absCount; ++i) {
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gCurrentCallback(command, gCurrentCallbackData);
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}
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}
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static void
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paste_clipboard_cb(GtkWidget *w, gpointer user_data)
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{
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gCurrentCallback(CommandPaste, gCurrentCallbackData);
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g_signal_stop_emission_by_name(w, "paste_clipboard");
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gHandled = true;
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}
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// GtkTextView-only signals
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static void
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select_all_cb(GtkWidget *w, gboolean select, gpointer user_data)
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{
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gCurrentCallback(CommandSelectAll, gCurrentCallbackData);
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g_signal_stop_emission_by_name(w, "select_all");
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gHandled = true;
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}
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NativeKeyBindings* NativeKeyBindings::sInstanceForSingleLineEditor = nullptr;
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NativeKeyBindings* NativeKeyBindings::sInstanceForMultiLineEditor = nullptr;
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// static
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NativeKeyBindings*
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NativeKeyBindings::GetInstance(NativeKeyBindingsType aType)
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{
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switch (aType) {
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case nsIWidget::NativeKeyBindingsForSingleLineEditor:
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if (!sInstanceForSingleLineEditor) {
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sInstanceForSingleLineEditor = new NativeKeyBindings();
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sInstanceForSingleLineEditor->Init(aType);
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}
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return sInstanceForSingleLineEditor;
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default:
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// fallback to multiline editor case in release build
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MOZ_ASSERT(false, "aType is invalid or not yet implemented");
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case nsIWidget::NativeKeyBindingsForMultiLineEditor:
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case nsIWidget::NativeKeyBindingsForRichTextEditor:
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if (!sInstanceForMultiLineEditor) {
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sInstanceForMultiLineEditor = new NativeKeyBindings();
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sInstanceForMultiLineEditor->Init(aType);
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}
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return sInstanceForMultiLineEditor;
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}
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}
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// static
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void
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NativeKeyBindings::Shutdown()
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{
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delete sInstanceForSingleLineEditor;
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sInstanceForSingleLineEditor = nullptr;
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delete sInstanceForMultiLineEditor;
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sInstanceForMultiLineEditor = nullptr;
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}
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void
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NativeKeyBindings::Init(NativeKeyBindingsType aType)
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{
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switch (aType) {
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case nsIWidget::NativeKeyBindingsForSingleLineEditor:
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mNativeTarget = gtk_entry_new();
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break;
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default:
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mNativeTarget = gtk_text_view_new();
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if (gtk_major_version > 2 ||
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(gtk_major_version == 2 && (gtk_minor_version > 2 ||
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(gtk_minor_version == 2 &&
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gtk_micro_version >= 2)))) {
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// select_all only exists in gtk >= 2.2.2. Prior to that,
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// ctrl+a is bound to (move to beginning, select to end).
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g_signal_connect(mNativeTarget, "select_all",
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G_CALLBACK(select_all_cb), this);
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}
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break;
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}
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g_object_ref_sink(mNativeTarget);
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g_signal_connect(mNativeTarget, "copy_clipboard",
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G_CALLBACK(copy_clipboard_cb), this);
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g_signal_connect(mNativeTarget, "cut_clipboard",
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G_CALLBACK(cut_clipboard_cb), this);
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g_signal_connect(mNativeTarget, "delete_from_cursor",
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G_CALLBACK(delete_from_cursor_cb), this);
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g_signal_connect(mNativeTarget, "move_cursor",
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G_CALLBACK(move_cursor_cb), this);
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g_signal_connect(mNativeTarget, "paste_clipboard",
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G_CALLBACK(paste_clipboard_cb), this);
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}
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NativeKeyBindings::~NativeKeyBindings()
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{
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gtk_widget_destroy(mNativeTarget);
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g_object_unref(mNativeTarget);
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}
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bool
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NativeKeyBindings::Execute(const WidgetKeyboardEvent& aEvent,
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DoCommandCallback aCallback,
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void* aCallbackData)
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{
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// If the native key event is set, it must be synthesized for tests.
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// We just ignore such events because this behavior depends on system
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// settings.
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if (!aEvent.mNativeKeyEvent) {
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// It must be synthesized event or dispatched DOM event from chrome.
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return false;
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}
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guint keyval;
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if (aEvent.charCode) {
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keyval = gdk_unicode_to_keyval(aEvent.charCode);
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} else {
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keyval =
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static_cast<GdkEventKey*>(aEvent.mNativeKeyEvent)->keyval;
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}
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if (ExecuteInternal(aEvent, aCallback, aCallbackData, keyval)) {
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return true;
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}
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for (uint32_t i = 0; i < aEvent.alternativeCharCodes.Length(); ++i) {
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uint32_t ch = aEvent.IsShift() ?
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aEvent.alternativeCharCodes[i].mShiftedCharCode :
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aEvent.alternativeCharCodes[i].mUnshiftedCharCode;
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if (ch && ch != aEvent.charCode) {
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keyval = gdk_unicode_to_keyval(ch);
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if (ExecuteInternal(aEvent, aCallback, aCallbackData, keyval)) {
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return true;
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}
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}
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}
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/*
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gtk_bindings_activate_event is preferable, but it has unresolved bug:
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http://bugzilla.gnome.org/show_bug.cgi?id=162726
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The bug was already marked as FIXED. However, somebody reports that the
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bug still exists.
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Also gtk_bindings_activate may work with some non-shortcuts operations
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(todo: check it). See bug 411005 and bug 406407.
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Code, which should be used after fixing GNOME bug 162726:
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gtk_bindings_activate_event(GTK_OBJECT(mNativeTarget),
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static_cast<GdkEventKey*>(aEvent.mNativeKeyEvent));
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*/
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return false;
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}
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bool
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NativeKeyBindings::ExecuteInternal(const WidgetKeyboardEvent& aEvent,
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DoCommandCallback aCallback,
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void* aCallbackData,
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guint aKeyval)
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{
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guint modifiers =
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static_cast<GdkEventKey*>(aEvent.mNativeKeyEvent)->state;
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gCurrentCallback = aCallback;
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gCurrentCallbackData = aCallbackData;
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gHandled = false;
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#if (MOZ_WIDGET_GTK == 2)
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gtk_bindings_activate(GTK_OBJECT(mNativeTarget),
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aKeyval, GdkModifierType(modifiers));
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#else
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gtk_bindings_activate(G_OBJECT(mNativeTarget),
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aKeyval, GdkModifierType(modifiers));
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#endif
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gCurrentCallback = nullptr;
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gCurrentCallbackData = nullptr;
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return gHandled;
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}
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} // namespace widget
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} // namespace mozilla
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