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) 2011-2015 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 "lisp.h"
  24 #include "frame.h"
  25 #include "xterm.h"
  26 #include "emacsgtkfixed.h"
  27
  28 /* Silence a bogus diagnostic; see GNOME bug 683906.  */
  29 #if 4 < __GNUC__ + (7 <= __GNUC_MINOR__)
  30 # pragma GCC diagnostic push
  31 # pragma GCC diagnostic ignored "-Wunused-local-typedefs"
  32 #endif
  33
  34 #define EMACS_TYPE_FIXED emacs_fixed_get_type ()
  35 #define EMACS_FIXED(obj) \
  36   G_TYPE_CHECK_INSTANCE_CAST (obj, EMACS_TYPE_FIXED, EmacsFixed)
  37
  38 typedef struct _EmacsFixed EmacsFixed;
  39 typedef struct _EmacsFixedPrivate EmacsFixedPrivate;
  40 typedef struct _EmacsFixedClass EmacsFixedClass;
  41
  42 struct _EmacsFixed
  43 {
  44   GtkFixed container;
  45
  46   /*< private >*/
  47   EmacsFixedPrivate *priv;
  48 };
  49
  50 struct _EmacsFixedClass
  51 {
  52   GtkFixedClass parent_class;
  53 };
  54
  55 struct _EmacsFixedPrivate
  56 {
  57   struct frame *f;
  58 };
  59
  60
  61 static void emacs_fixed_get_preferred_width  (GtkWidget *widget,
  62                                               gint      *minimum,
  63                                               gint      *natural);
  64 static void emacs_fixed_get_preferred_height (GtkWidget *widget,
  65                                               gint      *minimum,
  66                                               gint      *natural);
  67 static GType emacs_fixed_get_type (void);
  68 G_DEFINE_TYPE (EmacsFixed, emacs_fixed, GTK_TYPE_FIXED)
  69
  70 static void
  71 emacs_fixed_class_init (EmacsFixedClass *klass)
  72 {
  73   GtkWidgetClass *widget_class;
  74
  75   widget_class = (GtkWidgetClass*) klass;
  76
  77   widget_class->get_preferred_width = emacs_fixed_get_preferred_width;
  78   widget_class->get_preferred_height = emacs_fixed_get_preferred_height;
  79   g_type_class_add_private (klass, sizeof (EmacsFixedPrivate));
  80 }
  81
  82 static void
  83 emacs_fixed_init (EmacsFixed *fixed)
  84 {
  85   fixed->priv = G_TYPE_INSTANCE_GET_PRIVATE (fixed, EMACS_TYPE_FIXED,
  86                                              EmacsFixedPrivate);
  87   fixed->priv->f = 0;
  88 }
  89
  90 /**
  91  * emacs_fixed_new:
  92  *
  93  * Creates a new #EmacsFixed.
  94  *
  95  * Returns: a new #EmacsFixed.
  96  */
  97 GtkWidget*
  98 emacs_fixed_new (struct frame *f)
  99 {
 100   EmacsFixed *fixed = g_object_new (EMACS_TYPE_FIXED, NULL);
 101   EmacsFixedPrivate *priv = fixed->priv;
 102   priv->f = f;
 103   return GTK_WIDGET (fixed);
 104 }
 105
 106 static void
 107 emacs_fixed_get_preferred_width (GtkWidget *widget,
 108                                  gint      *minimum,
 109                                  gint      *natural)
 110 {
 111   EmacsFixed *fixed = EMACS_FIXED (widget);
 112   EmacsFixedPrivate *priv = fixed->priv;
 113   int w = priv->f->output_data.x->size_hints.min_width;
 114   if (minimum) *minimum = w;
 115   if (natural) *natural = w;
 116 }
 117
 118 static void
 119 emacs_fixed_get_preferred_height (GtkWidget *widget,
 120                                   gint      *minimum,
 121                                   gint      *natural)
 122 {
 123   EmacsFixed *fixed = EMACS_FIXED (widget);
 124   EmacsFixedPrivate *priv = fixed->priv;
 125   int h = priv->f->output_data.x->size_hints.min_height;
 126   if (minimum) *minimum = h;
 127   if (natural) *natural = h;
 128 }
 129
 130
 131 /* Override the X function so we can intercept Gtk+ 3 calls.
 132    Use our values for min_width/height so that KDE don't freak out
 133    (Bug#8919), and so users can resize our frames as they wish.  */
 134
 135 void
 136 XSetWMSizeHints (Display* d,
 137                  Window w,
 138                  XSizeHints* hints,
 139                  Atom prop)
 140 {
 141   struct x_display_info *dpyinfo = x_display_info_for_display (d);
 142   struct frame *f = x_top_window_to_frame (dpyinfo, w);
 143   long data[18];
 144   data[0] = hints->flags;
 145   data[1] = hints->x;
 146   data[2] = hints->y;
 147   data[3] = hints->width;
 148   data[4] = hints->height;
 149   data[5] = hints->min_width;
 150   data[6] = hints->min_height;
 151   data[7] = hints->max_width;
 152   data[8] = hints->max_height;
 153   data[9] = hints->width_inc;
 154   data[10] = hints->height_inc;
 155   data[11] = hints->min_aspect.x;
 156   data[12] = hints->min_aspect.y;
 157   data[13] = hints->max_aspect.x;
 158   data[14] = hints->max_aspect.y;
 159   data[15] = hints->base_width;
 160   data[16] = hints->base_height;
 161   data[17] = hints->win_gravity;
 162
 163   if ((hints->flags & PMinSize) && f)
 164     {
 165       int w = f->output_data.x->size_hints.min_width;
 166       int h = f->output_data.x->size_hints.min_height;
 167       data[5] = w;
 168       data[6] = h;
 169     }
 170
 171   XChangeProperty (d, w, prop, XA_WM_SIZE_HINTS, 32, PropModeReplace,
 172                    (unsigned char *) data, 18);
 173 }
 174
 175 /* Override this X11 function.
 176    This function is in the same X11 file as the one above.  So we must
 177    provide it also.  */
 178
 179 void
 180 XSetWMNormalHints (Display *d, Window w, XSizeHints *hints)
 181 {
 182   XSetWMSizeHints (d, w, hints, XA_WM_NORMAL_HINTS);
 183 }