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