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872f694c63
Now, nsIWidget::ExecuteNativeKeyBinding() isn't used by anybody for executing edit commands. Instead, they need array of edit commands for the key combination. So, the method should be renamed to GetEditCommands() and just return edit commands as an array. MozReview-Commit-ID: 4G0B1lJ8Lbe --HG-- extra : rebase_source : 4a5829281d59677c773950c34d91a1cd8074d243
369 lines
12 KiB
C++
369 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 nsTArray<CommandInt>* gCurrentCommands = nullptr;
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static bool gHandled = false;
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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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gCurrentCommands->AppendElement(CommandCopy);
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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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gCurrentCommands->AppendElement(CommandCut);
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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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gCurrentCommands->AppendElement(CommandWordNext);
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gCurrentCommands->AppendElement(CommandWordPrevious);
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} else {
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gCurrentCommands->AppendElement(CommandWordPrevious);
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gCurrentCommands->AppendElement(CommandWordNext);
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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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gCurrentCommands->AppendElement(CommandBeginLine);
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} else {
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gCurrentCommands->AppendElement(CommandEndLine);
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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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gCurrentCommands->AppendElement(command);
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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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gCurrentCommands->AppendElement(command);
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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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gCurrentCommands->AppendElement(CommandPaste);
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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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gCurrentCommands->AppendElement(CommandSelectAll);
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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_FALLTHROUGH_ASSERT("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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void
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NativeKeyBindings::GetEditCommands(const WidgetKeyboardEvent& aEvent,
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nsTArray<CommandInt>& aCommands)
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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;
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}
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guint keyval;
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if (aEvent.mCharCode) {
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keyval = gdk_unicode_to_keyval(aEvent.mCharCode);
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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 (GetEditCommandsInternal(aEvent, aCommands, keyval)) {
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return;
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}
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for (uint32_t i = 0; i < aEvent.mAlternativeCharCodes.Length(); ++i) {
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uint32_t ch = aEvent.IsShift() ?
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aEvent.mAlternativeCharCodes[i].mShiftedCharCode :
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aEvent.mAlternativeCharCodes[i].mUnshiftedCharCode;
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if (ch && ch != aEvent.mCharCode) {
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keyval = gdk_unicode_to_keyval(ch);
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if (GetEditCommandsInternal(aEvent, aCommands, keyval)) {
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return;
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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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}
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bool
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NativeKeyBindings::GetEditCommandsInternal(const WidgetKeyboardEvent& aEvent,
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nsTArray<CommandInt>& aCommands,
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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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gCurrentCommands = &aCommands;
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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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gCurrentCommands = nullptr;
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MOZ_ASSERT(!gHandled || !aCommands.IsEmpty());
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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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