src/emacsgtkfixed.c

   1 /* A Gtk Widget that inherits GtkFixed, but can be shrunk.
   2 This file is only use when compiling with Gtk+ 3.
   3
   4 Copyright (C) 2011-2012  Free Software Foundation, Inc.
   5
   6 This file is part of GNU Emacs.
   7
   8 GNU Emacs is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation, either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 GNU Emacs is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include <config.h>
  22
  23 #include "emacsgtkfixed.h"
  24 #include <stdio.h>
  25
  26 #include "lisp.h"
  27 #include "frame.h"
  28 #include "xterm.h"
  29
  30 /* Silence a bogus diagnostic; see GNOME bug 683906.  */
  31 #if (__GNUC__ == 4 && 6 <= __GNUC_MINOR__) || 4 < __GNUC__
  32 # pragma GCC diagnostic push
  33 # pragma GCC diagnostic ignored "-Wunused-local-typedefs"
  34 #endif
  35
  36 #define EMACS_TYPE_FIXED emacs_fixed_get_type ()
  37 #define EMACS_FIXED(obj) \
  38   G_TYPE_CHECK_INSTANCE_CAST (obj, EMACS_TYPE_FIXED, EmacsFixed)
  39
  40 typedef struct _EmacsFixed EmacsFixed;
  41 typedef struct _EmacsFixedPrivate EmacsFixedPrivate;
  42 typedef struct _EmacsFixedClass EmacsFixedClass;
  43
  44 struct _EmacsFixed
  45 {
  46   GtkFixed container;
  47
  48   /*< private >*/
  49   EmacsFixedPrivate *priv;
  50 };
  51
  52 struct _EmacsFixedClass
  53 {
  54   GtkFixedClass parent_class;
  55 };
  56
  57 struct _EmacsFixedPrivate
  58 {
  59   struct frame *f;
  60 };
  61
  62
  63 static void emacs_fixed_get_preferred_width  (GtkWidget *widget,
  64                                               gint      *minimum,
  65                                               gint      *natural);
  66 static void emacs_fixed_get_preferred_height (GtkWidget *widget,
  67                                               gint      *minimum,
  68                                               gint      *natural);
  69 static GType emacs_fixed_get_type (void);
  70 G_DEFINE_TYPE (EmacsFixed, emacs_fixed, GTK_TYPE_FIXED)
  71
  72 static void
  73 emacs_fixed_class_init (EmacsFixedClass *klass)
  74 {
  75   GtkWidgetClass *widget_class;
  76
  77   widget_class = (GtkWidgetClass*) klass;
  78
  79   widget_class->get_preferred_width = emacs_fixed_get_preferred_width;
  80   widget_class->get_preferred_height = emacs_fixed_get_preferred_height;
  81   g_type_class_add_private (klass, sizeof (EmacsFixedPrivate));
  82 }
  83
  84 static void
  85 emacs_fixed_init (EmacsFixed *fixed)
  86 {
  87   fixed->priv = G_TYPE_INSTANCE_GET_PRIVATE (fixed, EMACS_TYPE_FIXED,
  88                                              EmacsFixedPrivate);
  89   fixed->priv->f = 0;
  90 }
  91
  92 /**
  93  * emacs_fixed_new:
  94  *
  95  * Creates a new #EmacsFixed.
  96  *
  97  * Returns: a new #EmacsFixed.
  98  */
  99 GtkWidget*
 100 emacs_fixed_new (struct frame *f)
 101 {
 102   EmacsFixed *fixed = g_object_new (EMACS_TYPE_FIXED, NULL);
 103   EmacsFixedPrivate *priv = fixed->priv;
 104   priv->f = f;
 105   return GTK_WIDGET (fixed);
 106 }
 107
 108 static void
 109 emacs_fixed_get_preferred_width (GtkWidget *widget,
 110                                  gint      *minimum,
 111                                  gint      *natural)
 112 {
 113   EmacsFixed *fixed = EMACS_FIXED (widget);
 114   EmacsFixedPrivate *priv = fixed->priv;
 115   int w = priv->f->output_data.x->size_hints.min_width;
 116   if (minimum) *minimum = w;
 117   if (natural) *natural = w;
 118 }
 119
 120 static void
 121 emacs_fixed_get_preferred_height (GtkWidget *widget,
 122                                   gint      *minimum,
 123                                   gint      *natural)
 124 {
 125   EmacsFixed *fixed = EMACS_FIXED (widget);
 126   EmacsFixedPrivate *priv = fixed->priv;
 127   int h = priv->f->output_data.x->size_hints.min_height;
 128   if (minimum) *minimum = h;
 129   if (natural) *natural = h;
 130 }
 131
 132
 133 /* Override the X function so we can intercept Gtk+ 3 calls.
 134    Use our values for min_width/height so that KDE don't freak out
 135    (Bug#8919), and so users can resize our frames as they wish.  */
 136
 137 void
 138 XSetWMSizeHints (Display* d,
 139                  Window w,
 140                  XSizeHints* hints,
 141                  Atom prop)
 142 {
 143   struct x_display_info *dpyinfo = x_display_info_for_display (d);
 144   struct frame *f = x_top_window_to_frame (dpyinfo, w);
 145   long data[18];
 146   data[0] = hints->flags;
 147   data[1] = hints->x;
 148   data[2] = hints->y;
 149   data[3] = hints->width;
 150   data[4] = hints->height;
 151   data[5] = hints->min_width;
 152   data[6] = hints->min_height;
 153   data[7] = hints->max_width;
 154   data[8] = hints->max_height;
 155   data[9] = hints->width_inc;
 156   data[10] = hints->height_inc;
 157   data[11] = hints->min_aspect.x;
 158   data[12] = hints->min_aspect.y;
 159   data[13] = hints->max_aspect.x;
 160   data[14] = hints->max_aspect.y;
 161   data[15] = hints->base_width;
 162   data[16] = hints->base_height;
 163   data[17] = hints->win_gravity;
 164
 165   if ((hints->flags & PMinSize) && f)
 166     {
 167       int w = f->output_data.x->size_hints.min_width;
 168       int h = f->output_data.x->size_hints.min_height;
 169       data[5] = w;
 170       data[6] = h;
 171     }
 172
 173   XChangeProperty (d, w, prop, XA_WM_SIZE_HINTS, 32, PropModeReplace,
 174                    (unsigned char *) data, 18);
 175 }
 176
 177 /* Override this X11 function.
 178    This function is in the same X11 file as the one above.  So we must
 179    provide it also.  */
 180
 181 void
 182 XSetWMNormalHints (Display *d, Window w, XSizeHints *hints)
 183 {
 184   XSetWMSizeHints (d, w, hints, XA_WM_NORMAL_HINTS);
 185 }