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) 2011-2017 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 (at
  11 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 <https://www.gnu.org/licenses/>.  */
  20
  21 #include <config.h>
  22
  23 #include "lisp.h"
  24 #include "frame.h"
  25 #include "xterm.h"
  26 #include "xwidget.h"
  27 #include "emacsgtkfixed.h"
  28
  29 /* Silence a bogus diagnostic; see GNOME bug 683906.  */
  30 #if GNUC_PREREQ (4, 7, 0) && ! GLIB_CHECK_VERSION (2, 35, 7)
  31 # pragma GCC diagnostic push
  32 # pragma GCC diagnostic ignored "-Wunused-local-typedefs"
  33 #endif
  34
  35 typedef struct _EmacsFixed EmacsFixed;
  36 typedef struct _EmacsFixedClass EmacsFixedClass;
  37
  38 struct _EmacsFixedPrivate
  39 {
  40   struct frame *f;
  41 };
  42
  43
  44 static void emacs_fixed_get_preferred_width  (GtkWidget *widget,
  45                                               gint      *minimum,
  46                                               gint      *natural);
  47 static void emacs_fixed_get_preferred_height (GtkWidget *widget,
  48                                               gint      *minimum,
  49                                               gint      *natural);
  50 static GType emacs_fixed_get_type (void);
  51 G_DEFINE_TYPE (EmacsFixed, emacs_fixed, GTK_TYPE_FIXED)
  52
  53 static EmacsFixed *
  54 EMACS_FIXED (GtkWidget *widget)
  55 {
  56   return G_TYPE_CHECK_INSTANCE_CAST (widget, emacs_fixed_get_type (),
  57                                      EmacsFixed);
  58 }
  59
  60 #ifdef HAVE_XWIDGETS
  61
  62 static EmacsFixedClass *
  63 EMACS_FIXED_GET_CLASS (GtkWidget *widget)
  64 {
  65   return G_TYPE_INSTANCE_GET_CLASS (widget, emacs_fixed_get_type (),
  66                                     EmacsFixedClass);
  67 }
  68
  69 struct GtkFixedPrivateL
  70 {
  71   GList *children;
  72 };
  73
  74 static void
  75 emacs_fixed_gtk_widget_size_allocate (GtkWidget *widget,
  76                                       GtkAllocation *allocation)
  77 {
  78   /* For xwidgets.
  79
  80      This basically re-implements the base class method and adds an
  81      additional case for an xwidget view.
  82
  83      It would be nicer if the bse class method could be called first,
  84      and the xview modification only would remain here. It wasn't
  85      possible to solve it that way yet.  */
  86   EmacsFixedClass *klass;
  87   GtkWidgetClass *parent_class;
  88   struct GtkFixedPrivateL *priv;
  89
  90   klass = EMACS_FIXED_GET_CLASS (widget);
  91   parent_class = g_type_class_peek_parent (klass);
  92   parent_class->size_allocate (widget, allocation);
  93
  94   priv = G_TYPE_INSTANCE_GET_PRIVATE (widget, GTK_TYPE_FIXED,
  95                                       struct GtkFixedPrivateL);
  96
  97   gtk_widget_set_allocation (widget, allocation);
  98
  99   if (gtk_widget_get_has_window (widget))
 100     {
 101       if (gtk_widget_get_realized (widget))
 102         gdk_window_move_resize (gtk_widget_get_window (widget),
 103                                 allocation->x,
 104                                 allocation->y,
 105                                 allocation->width,
 106                                 allocation->height);
 107     }
 108
 109   for (GList *children = priv->children; children; children = children->next)
 110     {
 111       GtkFixedChild *child = children->data;
 112
 113       if (!gtk_widget_get_visible (child->widget))
 114         continue;
 115
 116       GtkRequisition child_requisition;
 117       gtk_widget_get_preferred_size (child->widget, &child_requisition, NULL);
 118
 119       GtkAllocation child_allocation;
 120       child_allocation.x = child->x;
 121       child_allocation.y = child->y;
 122
 123       if (!gtk_widget_get_has_window (widget))
 124         {
 125           child_allocation.x += allocation->x;
 126           child_allocation.y += allocation->y;
 127         }
 128
 129       child_allocation.width = child_requisition.width;
 130       child_allocation.height = child_requisition.height;
 131
 132       struct xwidget_view *xv
 133         = g_object_get_data (G_OBJECT (child->widget), XG_XWIDGET_VIEW);
 134       if (xv)
 135         {
 136           child_allocation.width = xv->clip_right;
 137           child_allocation.height = xv->clip_bottom - xv->clip_top;
 138         }
 139
 140       gtk_widget_size_allocate (child->widget, &child_allocation);
 141     }
 142 }
 143
 144 #endif  /* HAVE_XWIDGETS */
 145
 146 static void
 147 emacs_fixed_class_init (EmacsFixedClass *klass)
 148 {
 149   GtkWidgetClass *widget_class;
 150
 151   widget_class = (GtkWidgetClass *) klass;
 152
 153   widget_class->get_preferred_width = emacs_fixed_get_preferred_width;
 154   widget_class->get_preferred_height = emacs_fixed_get_preferred_height;
 155 #ifdef HAVE_XWIDGETS
 156   widget_class->size_allocate = emacs_fixed_gtk_widget_size_allocate;
 157 #endif
 158   g_type_class_add_private (klass, sizeof (EmacsFixedPrivate));
 159 }
 160
 161 static void
 162 emacs_fixed_init (EmacsFixed *fixed)
 163 {
 164   fixed->priv = G_TYPE_INSTANCE_GET_PRIVATE (fixed, emacs_fixed_get_type (),
 165                                              EmacsFixedPrivate);
 166   fixed->priv->f = 0;
 167 }
 168
 169 GtkWidget *
 170 emacs_fixed_new (struct frame *f)
 171 {
 172   EmacsFixed *fixed = g_object_new (emacs_fixed_get_type (), NULL);
 173   EmacsFixedPrivate *priv = fixed->priv;
 174   priv->f = f;
 175   return GTK_WIDGET (fixed);
 176 }
 177
 178 static void
 179 emacs_fixed_get_preferred_width (GtkWidget *widget,
 180                                  gint      *minimum,
 181                                  gint      *natural)
 182 {
 183   EmacsFixed *fixed = EMACS_FIXED (widget);
 184   EmacsFixedPrivate *priv = fixed->priv;
 185   int w = priv->f->output_data.x->size_hints.min_width;
 186   if (minimum) *minimum = w;
 187   if (natural) *natural = w;
 188 }
 189
 190 static void
 191 emacs_fixed_get_preferred_height (GtkWidget *widget,
 192                                   gint      *minimum,
 193                                   gint      *natural)
 194 {
 195   EmacsFixed *fixed = EMACS_FIXED (widget);
 196   EmacsFixedPrivate *priv = fixed->priv;
 197   int h = priv->f->output_data.x->size_hints.min_height;
 198   if (minimum) *minimum = h;
 199   if (natural) *natural = h;
 200 }
 201
 202
 203 /* Override the X function so we can intercept Gtk+ 3 calls.
 204    Use our values for min_width/height so that KDE don't freak out
 205    (Bug#8919), and so users can resize our frames as they wish.  */
 206
 207 void
 208 XSetWMSizeHints (Display *d,
 209                  Window w,
 210                  XSizeHints *hints,
 211                  Atom prop)
 212 {
 213   struct x_display_info *dpyinfo = x_display_info_for_display (d);
 214   struct frame *f = x_top_window_to_frame (dpyinfo, w);
 215   long data[18];
 216   data[0] = hints->flags;
 217   data[1] = hints->x;
 218   data[2] = hints->y;
 219   data[3] = hints->width;
 220   data[4] = hints->height;
 221   data[5] = hints->min_width;
 222   data[6] = hints->min_height;
 223   data[7] = hints->max_width;
 224   data[8] = hints->max_height;
 225   data[9] = hints->width_inc;
 226   data[10] = hints->height_inc;
 227   data[11] = hints->min_aspect.x;
 228   data[12] = hints->min_aspect.y;
 229   data[13] = hints->max_aspect.x;
 230   data[14] = hints->max_aspect.y;
 231   data[15] = hints->base_width;
 232   data[16] = hints->base_height;
 233   data[17] = hints->win_gravity;
 234
 235   if ((hints->flags & PMinSize) && f)
 236     {
 237       int w = f->output_data.x->size_hints.min_width;
 238       int h = f->output_data.x->size_hints.min_height;
 239       data[5] = w;
 240       data[6] = h;
 241     }
 242
 243   XChangeProperty (d, w, prop, XA_WM_SIZE_HINTS, 32, PropModeReplace,
 244                    (unsigned char *) data, 18);
 245 }
 246
 247 /* Override this X11 function.
 248    This function is in the same X11 file as the one above.  So we must
 249    provide it also.  */
 250
 251 void
 252 XSetWMNormalHints (Display *d, Window w, XSizeHints *hints)
 253 {
 254   XSetWMSizeHints (d, w, hints, XA_WM_NORMAL_HINTS);
 255 }