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