LCOV - code coverage report
Current view: directory - widget/gtk2 - nsNativeKeyBindings.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 117 0 0.0 %
Date: 2012-06-02 Functions: 15 0 0.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is Mozilla.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * IBM Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 2004
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *  Brian Ryner <bryner@brianryner.com>
      24                 :  *
      25                 :  * Alternatively, the contents of this file may be used under the terms of
      26                 :  * either the GNU General Public License Version 2 or later (the "GPL"), or
      27                 :  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      28                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      29                 :  * of those above. If you wish to allow use of your version of this file only
      30                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      31                 :  * use your version of this file under the terms of the MPL, indicate your
      32                 :  * decision by deleting the provisions above and replace them with the notice
      33                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      34                 :  * the provisions above, a recipient may use your version of this file under
      35                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      36                 :  *
      37                 :  * ***** END LICENSE BLOCK ***** */
      38                 : 
      39                 : #include "mozilla/Util.h"
      40                 : 
      41                 : #include "nsNativeKeyBindings.h"
      42                 : #include "nsString.h"
      43                 : #include "nsMemory.h"
      44                 : #include "nsGtkKeyUtils.h"
      45                 : #include "nsGUIEvent.h"
      46                 : 
      47                 : #include <gtk/gtk.h>
      48                 : #include <gdk/gdkkeysyms.h>
      49                 : #include <gdk/gdk.h>
      50                 : 
      51                 : using namespace mozilla;
      52                 : using namespace mozilla::widget;
      53                 : 
      54                 : static nsINativeKeyBindings::DoCommandCallback gCurrentCallback;
      55                 : static void *gCurrentCallbackData;
      56                 : static bool gHandled;
      57                 : 
      58                 : // Common GtkEntry and GtkTextView signals
      59                 : static void
      60               0 : copy_clipboard_cb(GtkWidget *w, gpointer user_data)
      61                 : {
      62               0 :   gCurrentCallback("cmd_copy", gCurrentCallbackData);
      63               0 :   g_signal_stop_emission_by_name(w, "copy_clipboard");
      64               0 :   gHandled = true;
      65               0 : }
      66                 : 
      67                 : static void
      68               0 : cut_clipboard_cb(GtkWidget *w, gpointer user_data)
      69                 : {
      70               0 :   gCurrentCallback("cmd_cut", gCurrentCallbackData);
      71               0 :   g_signal_stop_emission_by_name(w, "cut_clipboard");
      72               0 :   gHandled = true;
      73               0 : }
      74                 : 
      75                 : // GTK distinguishes between display lines (wrapped, as they appear on the
      76                 : // screen) and paragraphs, which are runs of text terminated by a newline.
      77                 : // We don't have this distinction, so we always use editor's notion of
      78                 : // lines, which are newline-terminated.
      79                 : 
      80                 : static const char *const sDeleteCommands[][2] = {
      81                 :   // backward, forward
      82                 :   { "cmd_deleteCharBackward", "cmd_deleteCharForward" },    // CHARS
      83                 :   { "cmd_deleteWordBackward", "cmd_deleteWordForward" },    // WORD_ENDS
      84                 :   { "cmd_deleteWordBackward", "cmd_deleteWordForward" },    // WORDS
      85                 :   { "cmd_deleteToBeginningOfLine", "cmd_deleteToEndOfLine" }, // LINES
      86                 :   { "cmd_deleteToBeginningOfLine", "cmd_deleteToEndOfLine" }, // LINE_ENDS
      87                 :   { "cmd_deleteToBeginningOfLine", "cmd_deleteToEndOfLine" }, // PARAGRAPH_ENDS
      88                 :   { "cmd_deleteToBeginningOfLine", "cmd_deleteToEndOfLine" }, // PARAGRAPHS
      89                 :   // This deletes from the end of the previous word to the beginning of the
      90                 :   // next word, but only if the caret is not in a word.
      91                 :   // XXX need to implement in editor
      92                 :   { nsnull, nsnull } // WHITESPACE
      93                 : };
      94                 : 
      95                 : static void
      96               0 : delete_from_cursor_cb(GtkWidget *w, GtkDeleteType del_type,
      97                 :                       gint count, gpointer user_data)
      98                 : {
      99               0 :   g_signal_stop_emission_by_name(w, "delete_from_cursor");
     100               0 :   gHandled = true;
     101                 : 
     102               0 :   bool forward = count > 0;
     103               0 :   if (PRUint32(del_type) >= ArrayLength(sDeleteCommands)) {
     104                 :     // unsupported deletion type
     105               0 :     return;
     106                 :   }
     107                 : 
     108               0 :   if (del_type == GTK_DELETE_WORDS) {
     109                 :     // This works like word_ends, except we first move the caret to the
     110                 :     // beginning/end of the current word.
     111               0 :     if (forward) {
     112               0 :       gCurrentCallback("cmd_wordNext", gCurrentCallbackData);
     113               0 :       gCurrentCallback("cmd_wordPrevious", gCurrentCallbackData);
     114                 :     } else {
     115               0 :       gCurrentCallback("cmd_wordPrevious", gCurrentCallbackData);
     116               0 :       gCurrentCallback("cmd_wordNext", gCurrentCallbackData);
     117                 :     }
     118               0 :   } else if (del_type == GTK_DELETE_DISPLAY_LINES ||
     119                 :              del_type == GTK_DELETE_PARAGRAPHS) {
     120                 : 
     121                 :     // This works like display_line_ends, except we first move the caret to the
     122                 :     // beginning/end of the current line.
     123               0 :     if (forward) {
     124               0 :       gCurrentCallback("cmd_beginLine", gCurrentCallbackData);
     125                 :     } else {
     126               0 :       gCurrentCallback("cmd_endLine", gCurrentCallbackData);
     127                 :     }
     128                 :   }
     129                 : 
     130               0 :   const char *cmd = sDeleteCommands[del_type][forward];
     131               0 :   if (!cmd)
     132               0 :     return; // unsupported command
     133                 : 
     134               0 :   count = NS_ABS(count);
     135               0 :   for (int i = 0; i < count; ++i) {
     136               0 :     gCurrentCallback(cmd, gCurrentCallbackData);
     137                 :   }
     138                 : }
     139                 : 
     140                 : static const char *const sMoveCommands[][2][2] = {
     141                 :   // non-extend { backward, forward }, extend { backward, forward }
     142                 :   // GTK differentiates between logical position, which is prev/next,
     143                 :   // and visual position, which is always left/right.
     144                 :   // We should fix this to work the same way for RTL text input.
     145                 :   { // LOGICAL_POSITIONS
     146                 :     { "cmd_charPrevious", "cmd_charNext" },
     147                 :     { "cmd_selectCharPrevious", "cmd_selectCharNext" }
     148                 :   },
     149                 :   { // VISUAL_POSITIONS
     150                 :     { "cmd_charPrevious", "cmd_charNext" },
     151                 :     { "cmd_selectCharPrevious", "cmd_selectCharNext" }
     152                 :   },
     153                 :   { // WORDS
     154                 :     { "cmd_wordPrevious", "cmd_wordNext" },
     155                 :     { "cmd_selectWordPrevious", "cmd_selectWordNext" }
     156                 :   },
     157                 :   { // DISPLAY_LINES
     158                 :     { "cmd_linePrevious", "cmd_lineNext" },
     159                 :     { "cmd_selectLinePrevious", "cmd_selectLineNext" }
     160                 :   },
     161                 :   { // DISPLAY_LINE_ENDS
     162                 :     { "cmd_beginLine", "cmd_endLine" },
     163                 :     { "cmd_selectBeginLine", "cmd_selectEndLine" }
     164                 :   },
     165                 :   { // PARAGRAPHS
     166                 :     { "cmd_linePrevious", "cmd_lineNext" },
     167                 :     { "cmd_selectLinePrevious", "cmd_selectLineNext" }
     168                 :   },
     169                 :   { // PARAGRAPH_ENDS
     170                 :     { "cmd_beginLine", "cmd_endLine" },
     171                 :     { "cmd_selectBeginLine", "cmd_selectEndLine" }
     172                 :   },
     173                 :   { // PAGES
     174                 :     { "cmd_movePageUp", "cmd_movePageDown" },
     175                 :     { "cmd_selectPageUp", "cmd_selectPageDown" }
     176                 :   },
     177                 :   { // BUFFER_ENDS
     178                 :     { "cmd_moveTop", "cmd_moveBottom" },
     179                 :     { "cmd_selectTop", "cmd_selectBottom" }
     180                 :   },
     181                 :   { // HORIZONTAL_PAGES (unsupported)
     182                 :     { nsnull, nsnull },
     183                 :     { nsnull, nsnull }
     184                 :   }
     185                 : };
     186                 : 
     187                 : static void
     188               0 : move_cursor_cb(GtkWidget *w, GtkMovementStep step, gint count,
     189                 :                gboolean extend_selection, gpointer user_data)
     190                 : {
     191               0 :   g_signal_stop_emission_by_name(w, "move_cursor");
     192               0 :   gHandled = true;
     193               0 :   bool forward = count > 0;
     194               0 :   if (PRUint32(step) >= ArrayLength(sMoveCommands)) {
     195                 :     // unsupported movement type
     196               0 :     return;
     197                 :   }
     198                 : 
     199               0 :   const char *cmd = sMoveCommands[step][extend_selection][forward];
     200               0 :   if (!cmd)
     201               0 :     return; // unsupported command
     202                 : 
     203                 :   
     204               0 :   count = NS_ABS(count);
     205               0 :   for (int i = 0; i < count; ++i) {
     206               0 :     gCurrentCallback(cmd, gCurrentCallbackData);
     207                 :   }
     208                 : }
     209                 : 
     210                 : static void
     211               0 : paste_clipboard_cb(GtkWidget *w, gpointer user_data)
     212                 : {
     213               0 :   gCurrentCallback("cmd_paste", gCurrentCallbackData);
     214               0 :   g_signal_stop_emission_by_name(w, "paste_clipboard");
     215               0 :   gHandled = true;
     216               0 : }
     217                 : 
     218                 : // GtkTextView-only signals
     219                 : static void
     220               0 : select_all_cb(GtkWidget *w, gboolean select, gpointer user_data)
     221                 : {
     222               0 :   gCurrentCallback("cmd_selectAll", gCurrentCallbackData);
     223               0 :   g_signal_stop_emission_by_name(w, "select_all");
     224               0 :   gHandled = true;
     225               0 : }
     226                 : 
     227                 : void
     228               0 : nsNativeKeyBindings::Init(NativeKeyBindingsType  aType)
     229                 : {
     230               0 :   switch (aType) {
     231                 :   case eKeyBindings_Input:
     232               0 :     mNativeTarget = gtk_entry_new();
     233               0 :     break;
     234                 :   case eKeyBindings_TextArea:
     235               0 :     mNativeTarget = gtk_text_view_new();
     236               0 :     if (gtk_major_version > 2 ||
     237                 :         (gtk_major_version == 2 && (gtk_minor_version > 2 ||
     238                 :                                     (gtk_minor_version == 2 &&
     239                 :                                      gtk_micro_version >= 2)))) {
     240                 :       // select_all only exists in gtk >= 2.2.2.  Prior to that,
     241                 :       // ctrl+a is bound to (move to beginning, select to end).
     242               0 :       g_signal_connect(mNativeTarget, "select_all",
     243               0 :                        G_CALLBACK(select_all_cb), this);
     244                 :     }
     245               0 :     break;
     246                 :   }
     247                 : 
     248               0 :   g_object_ref_sink(mNativeTarget);
     249                 : 
     250               0 :   g_signal_connect(mNativeTarget, "copy_clipboard",
     251               0 :                    G_CALLBACK(copy_clipboard_cb), this);
     252               0 :   g_signal_connect(mNativeTarget, "cut_clipboard",
     253               0 :                    G_CALLBACK(cut_clipboard_cb), this);
     254               0 :   g_signal_connect(mNativeTarget, "delete_from_cursor",
     255               0 :                    G_CALLBACK(delete_from_cursor_cb), this);
     256               0 :   g_signal_connect(mNativeTarget, "move_cursor",
     257               0 :                    G_CALLBACK(move_cursor_cb), this);
     258               0 :   g_signal_connect(mNativeTarget, "paste_clipboard",
     259               0 :                    G_CALLBACK(paste_clipboard_cb), this);
     260               0 : }
     261                 : 
     262               0 : nsNativeKeyBindings::~nsNativeKeyBindings()
     263                 : {
     264               0 :   gtk_widget_destroy(mNativeTarget);
     265               0 :   g_object_unref(mNativeTarget);
     266               0 : }
     267                 : 
     268               0 : NS_IMPL_ISUPPORTS1(nsNativeKeyBindings, nsINativeKeyBindings)
     269                 : 
     270                 : bool
     271               0 : nsNativeKeyBindings::KeyDown(const nsNativeKeyEvent& aEvent,
     272                 :                              DoCommandCallback aCallback, void *aCallbackData)
     273                 : {
     274               0 :   return false;
     275                 : }
     276                 : 
     277                 : bool
     278               0 : nsNativeKeyBindings::KeyPress(const nsNativeKeyEvent& aEvent,
     279                 :                               DoCommandCallback aCallback, void *aCallbackData)
     280                 : {
     281                 :   PRUint32 keyCode;
     282                 : 
     283               0 :   if (aEvent.charCode != 0)
     284               0 :     keyCode = gdk_unicode_to_keyval(aEvent.charCode);
     285                 :   else
     286               0 :     keyCode = KeymapWrapper::GuessGDKKeyval(aEvent.keyCode);
     287                 : 
     288               0 :   if (KeyPressInternal(aEvent, aCallback, aCallbackData, keyCode))
     289               0 :     return true;
     290                 : 
     291               0 :   nsKeyEvent *nativeKeyEvent = static_cast<nsKeyEvent*>(aEvent.nativeEvent);
     292               0 :   if (!nativeKeyEvent ||
     293                 :       (nativeKeyEvent->eventStructType != NS_KEY_EVENT &&
     294                 :        nativeKeyEvent->message != NS_KEY_PRESS)) {
     295               0 :     return false;
     296                 :   }
     297                 : 
     298               0 :   for (PRUint32 i = 0; i < nativeKeyEvent->alternativeCharCodes.Length(); ++i) {
     299                 :     PRUint32 ch = nativeKeyEvent->isShift ?
     300               0 :         nativeKeyEvent->alternativeCharCodes[i].mShiftedCharCode :
     301               0 :         nativeKeyEvent->alternativeCharCodes[i].mUnshiftedCharCode;
     302               0 :     if (ch && ch != aEvent.charCode) {
     303               0 :       keyCode = gdk_unicode_to_keyval(ch);
     304               0 :       if (KeyPressInternal(aEvent, aCallback, aCallbackData, keyCode))
     305               0 :         return true;
     306                 :     }
     307                 :   }
     308                 : 
     309                 : /* gtk_bindings_activate_event is preferable, but it has unresolved bug: http://bugzilla.gnome.org/show_bug.cgi?id=162726
     310                 : Also gtk_bindings_activate may work with some non-shortcuts operations (todo: check it)
     311                 : See bugs 411005 406407
     312                 : 
     313                 :   Code, which should be used after fixing http://bugzilla.gnome.org/show_bug.cgi?id=162726:
     314                 :   const nsGUIEvent *guiEvent = static_cast<nsGUIEvent*>(aEvent.nativeEvent);
     315                 :   if (guiEvent &&
     316                 :      (guiEvent->message == NS_KEY_PRESS || guiEvent->message == NS_KEY_UP || guiEvent->message == NS_KEY_DOWN) &&
     317                 :       guiEvent->pluginEvent)
     318                 :         gtk_bindings_activate_event(GTK_OBJECT(mNativeTarget),
     319                 :                                     static_cast<GdkEventKey*>(guiEvent->pluginEvent));
     320                 : */
     321                 : 
     322               0 :   return false;
     323                 : }
     324                 : 
     325                 : bool
     326               0 : nsNativeKeyBindings::KeyPressInternal(const nsNativeKeyEvent& aEvent,
     327                 :                                       DoCommandCallback aCallback,
     328                 :                                       void *aCallbackData,
     329                 :                                       PRUint32 aKeyCode)
     330                 : {
     331               0 :   int modifiers = 0;
     332               0 :   if (aEvent.altKey)
     333               0 :     modifiers |= GDK_MOD1_MASK;
     334               0 :   if (aEvent.ctrlKey)
     335               0 :     modifiers |= GDK_CONTROL_MASK;
     336               0 :   if (aEvent.shiftKey)
     337               0 :     modifiers |= GDK_SHIFT_MASK;
     338                 :   // we don't support meta
     339                 : 
     340               0 :   gCurrentCallback = aCallback;
     341               0 :   gCurrentCallbackData = aCallbackData;
     342                 : 
     343               0 :   gHandled = false;
     344                 : 
     345               0 :   gtk_bindings_activate(GTK_OBJECT(mNativeTarget),
     346               0 :                         aKeyCode, GdkModifierType(modifiers));
     347                 : 
     348               0 :   gCurrentCallback = nsnull;
     349               0 :   gCurrentCallbackData = nsnull;
     350                 : 
     351               0 :   return gHandled;
     352                 : }
     353                 : 
     354                 : bool
     355               0 : nsNativeKeyBindings::KeyUp(const nsNativeKeyEvent& aEvent,
     356                 :                            DoCommandCallback aCallback, void *aCallbackData)
     357                 : {
     358               0 :   return false;
     359                 : }

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