gecko/widget/gtk2/nsNativeKeyBindings.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2012-05-21 04:12:37 -07:00
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/Util.h"
#include "nsNativeKeyBindings.h"
#include "nsString.h"
#include "nsMemory.h"
#include "nsGtkKeyUtils.h"
#include "nsGUIEvent.h"
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <gdk/gdk.h>
using namespace mozilla;
using namespace mozilla::widget;
static nsINativeKeyBindings::DoCommandCallback gCurrentCallback;
static void *gCurrentCallbackData;
static bool gHandled;
// Common GtkEntry and GtkTextView signals
static void
copy_clipboard_cb(GtkWidget *w, gpointer user_data)
{
gCurrentCallback("cmd_copy", gCurrentCallbackData);
g_signal_stop_emission_by_name(w, "copy_clipboard");
gHandled = true;
}
static void
cut_clipboard_cb(GtkWidget *w, gpointer user_data)
{
gCurrentCallback("cmd_cut", gCurrentCallbackData);
g_signal_stop_emission_by_name(w, "cut_clipboard");
gHandled = true;
}
// GTK distinguishes between display lines (wrapped, as they appear on the
// screen) and paragraphs, which are runs of text terminated by a newline.
// We don't have this distinction, so we always use editor's notion of
// lines, which are newline-terminated.
static const char *const sDeleteCommands[][2] = {
// backward, forward
{ "cmd_deleteCharBackward", "cmd_deleteCharForward" }, // CHARS
{ "cmd_deleteWordBackward", "cmd_deleteWordForward" }, // WORD_ENDS
{ "cmd_deleteWordBackward", "cmd_deleteWordForward" }, // WORDS
{ "cmd_deleteToBeginningOfLine", "cmd_deleteToEndOfLine" }, // LINES
{ "cmd_deleteToBeginningOfLine", "cmd_deleteToEndOfLine" }, // LINE_ENDS
{ "cmd_deleteToBeginningOfLine", "cmd_deleteToEndOfLine" }, // PARAGRAPH_ENDS
{ "cmd_deleteToBeginningOfLine", "cmd_deleteToEndOfLine" }, // PARAGRAPHS
// This deletes from the end of the previous word to the beginning of the
// next word, but only if the caret is not in a word.
// XXX need to implement in editor
{ nullptr, nullptr } // WHITESPACE
};
static void
delete_from_cursor_cb(GtkWidget *w, GtkDeleteType del_type,
gint count, gpointer user_data)
{
g_signal_stop_emission_by_name(w, "delete_from_cursor");
gHandled = true;
bool forward = count > 0;
if (uint32_t(del_type) >= ArrayLength(sDeleteCommands)) {
// unsupported deletion type
return;
}
if (del_type == GTK_DELETE_WORDS) {
// This works like word_ends, except we first move the caret to the
// beginning/end of the current word.
if (forward) {
gCurrentCallback("cmd_wordNext", gCurrentCallbackData);
gCurrentCallback("cmd_wordPrevious", gCurrentCallbackData);
} else {
gCurrentCallback("cmd_wordPrevious", gCurrentCallbackData);
gCurrentCallback("cmd_wordNext", gCurrentCallbackData);
}
} else if (del_type == GTK_DELETE_DISPLAY_LINES ||
del_type == GTK_DELETE_PARAGRAPHS) {
// This works like display_line_ends, except we first move the caret to the
// beginning/end of the current line.
if (forward) {
gCurrentCallback("cmd_beginLine", gCurrentCallbackData);
} else {
gCurrentCallback("cmd_endLine", gCurrentCallbackData);
}
}
const char *cmd = sDeleteCommands[del_type][forward];
if (!cmd)
return; // unsupported command
count = NS_ABS(count);
for (int i = 0; i < count; ++i) {
gCurrentCallback(cmd, gCurrentCallbackData);
}
}
static const char *const sMoveCommands[][2][2] = {
// non-extend { backward, forward }, extend { backward, forward }
// GTK differentiates between logical position, which is prev/next,
// and visual position, which is always left/right.
// We should fix this to work the same way for RTL text input.
{ // LOGICAL_POSITIONS
{ "cmd_charPrevious", "cmd_charNext" },
{ "cmd_selectCharPrevious", "cmd_selectCharNext" }
},
{ // VISUAL_POSITIONS
{ "cmd_charPrevious", "cmd_charNext" },
{ "cmd_selectCharPrevious", "cmd_selectCharNext" }
},
{ // WORDS
{ "cmd_wordPrevious", "cmd_wordNext" },
{ "cmd_selectWordPrevious", "cmd_selectWordNext" }
},
{ // DISPLAY_LINES
{ "cmd_linePrevious", "cmd_lineNext" },
{ "cmd_selectLinePrevious", "cmd_selectLineNext" }
},
{ // DISPLAY_LINE_ENDS
{ "cmd_beginLine", "cmd_endLine" },
{ "cmd_selectBeginLine", "cmd_selectEndLine" }
},
{ // PARAGRAPHS
{ "cmd_linePrevious", "cmd_lineNext" },
{ "cmd_selectLinePrevious", "cmd_selectLineNext" }
},
{ // PARAGRAPH_ENDS
{ "cmd_beginLine", "cmd_endLine" },
{ "cmd_selectBeginLine", "cmd_selectEndLine" }
},
{ // PAGES
{ "cmd_movePageUp", "cmd_movePageDown" },
{ "cmd_selectPageUp", "cmd_selectPageDown" }
},
{ // BUFFER_ENDS
{ "cmd_moveTop", "cmd_moveBottom" },
{ "cmd_selectTop", "cmd_selectBottom" }
},
{ // HORIZONTAL_PAGES (unsupported)
{ nullptr, nullptr },
{ nullptr, nullptr }
}
};
static void
move_cursor_cb(GtkWidget *w, GtkMovementStep step, gint count,
gboolean extend_selection, gpointer user_data)
{
g_signal_stop_emission_by_name(w, "move_cursor");
gHandled = true;
bool forward = count > 0;
if (uint32_t(step) >= ArrayLength(sMoveCommands)) {
// unsupported movement type
return;
}
const char *cmd = sMoveCommands[step][extend_selection][forward];
if (!cmd)
return; // unsupported command
count = NS_ABS(count);
for (int i = 0; i < count; ++i) {
gCurrentCallback(cmd, gCurrentCallbackData);
}
}
static void
paste_clipboard_cb(GtkWidget *w, gpointer user_data)
{
gCurrentCallback("cmd_paste", gCurrentCallbackData);
g_signal_stop_emission_by_name(w, "paste_clipboard");
gHandled = true;
}
// GtkTextView-only signals
static void
select_all_cb(GtkWidget *w, gboolean select, gpointer user_data)
{
gCurrentCallback("cmd_selectAll", gCurrentCallbackData);
g_signal_stop_emission_by_name(w, "select_all");
gHandled = true;
}
void
nsNativeKeyBindings::Init(NativeKeyBindingsType aType)
{
switch (aType) {
case eKeyBindings_Input:
mNativeTarget = gtk_entry_new();
break;
case eKeyBindings_TextArea:
mNativeTarget = gtk_text_view_new();
if (gtk_major_version > 2 ||
(gtk_major_version == 2 && (gtk_minor_version > 2 ||
(gtk_minor_version == 2 &&
gtk_micro_version >= 2)))) {
// select_all only exists in gtk >= 2.2.2. Prior to that,
// ctrl+a is bound to (move to beginning, select to end).
g_signal_connect(mNativeTarget, "select_all",
G_CALLBACK(select_all_cb), this);
}
break;
}
g_object_ref_sink(mNativeTarget);
g_signal_connect(mNativeTarget, "copy_clipboard",
G_CALLBACK(copy_clipboard_cb), this);
g_signal_connect(mNativeTarget, "cut_clipboard",
G_CALLBACK(cut_clipboard_cb), this);
g_signal_connect(mNativeTarget, "delete_from_cursor",
G_CALLBACK(delete_from_cursor_cb), this);
g_signal_connect(mNativeTarget, "move_cursor",
G_CALLBACK(move_cursor_cb), this);
g_signal_connect(mNativeTarget, "paste_clipboard",
G_CALLBACK(paste_clipboard_cb), this);
}
nsNativeKeyBindings::~nsNativeKeyBindings()
{
gtk_widget_destroy(mNativeTarget);
g_object_unref(mNativeTarget);
}
NS_IMPL_ISUPPORTS1(nsNativeKeyBindings, nsINativeKeyBindings)
bool
nsNativeKeyBindings::KeyDown(const nsNativeKeyEvent& aEvent,
DoCommandCallback aCallback, void *aCallbackData)
{
return false;
}
bool
nsNativeKeyBindings::KeyPress(const nsNativeKeyEvent& aEvent,
DoCommandCallback aCallback, void *aCallbackData)
{
uint32_t keyCode;
if (aEvent.charCode != 0)
keyCode = gdk_unicode_to_keyval(aEvent.charCode);
else
keyCode = KeymapWrapper::GuessGDKKeyval(aEvent.keyCode);
if (KeyPressInternal(aEvent, aCallback, aCallbackData, keyCode))
return true;
nsKeyEvent *nativeKeyEvent = static_cast<nsKeyEvent*>(aEvent.nativeEvent);
if (!nativeKeyEvent ||
(nativeKeyEvent->eventStructType != NS_KEY_EVENT &&
nativeKeyEvent->message != NS_KEY_PRESS)) {
return false;
}
for (uint32_t i = 0; i < nativeKeyEvent->alternativeCharCodes.Length(); ++i) {
uint32_t ch = nativeKeyEvent->IsShift() ?
nativeKeyEvent->alternativeCharCodes[i].mShiftedCharCode :
nativeKeyEvent->alternativeCharCodes[i].mUnshiftedCharCode;
if (ch && ch != aEvent.charCode) {
keyCode = gdk_unicode_to_keyval(ch);
if (KeyPressInternal(aEvent, aCallback, aCallbackData, keyCode))
return true;
}
}
/* gtk_bindings_activate_event is preferable, but it has unresolved bug: http://bugzilla.gnome.org/show_bug.cgi?id=162726
Also gtk_bindings_activate may work with some non-shortcuts operations (todo: check it)
See bugs 411005 406407
Code, which should be used after fixing http://bugzilla.gnome.org/show_bug.cgi?id=162726:
const nsGUIEvent *guiEvent = static_cast<nsGUIEvent*>(aEvent.nativeEvent);
if (guiEvent &&
(guiEvent->message == NS_KEY_PRESS || guiEvent->message == NS_KEY_UP || guiEvent->message == NS_KEY_DOWN) &&
guiEvent->pluginEvent)
gtk_bindings_activate_event(GTK_OBJECT(mNativeTarget),
static_cast<GdkEventKey*>(guiEvent->pluginEvent));
*/
return false;
}
bool
nsNativeKeyBindings::KeyPressInternal(const nsNativeKeyEvent& aEvent,
DoCommandCallback aCallback,
void *aCallbackData,
uint32_t aKeyCode)
{
int modifiers = 0;
if (aEvent.altKey)
modifiers |= GDK_MOD1_MASK;
if (aEvent.ctrlKey)
modifiers |= GDK_CONTROL_MASK;
if (aEvent.shiftKey)
modifiers |= GDK_SHIFT_MASK;
// we don't support meta
gCurrentCallback = aCallback;
gCurrentCallbackData = aCallbackData;
gHandled = false;
#if (MOZ_WIDGET_GTK == 2)
gtk_bindings_activate(GTK_OBJECT(mNativeTarget),
aKeyCode, GdkModifierType(modifiers));
#else
gtk_bindings_activate(G_OBJECT(mNativeTarget),
aKeyCode, GdkModifierType(modifiers));
#endif
gCurrentCallback = nullptr;
gCurrentCallbackData = nullptr;
return gHandled;
}
bool
nsNativeKeyBindings::KeyUp(const nsNativeKeyEvent& aEvent,
DoCommandCallback aCallback, void *aCallbackData)
{
return false;
}