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Better solution for #517272

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This commit is contained in:
Karel Klíč 2010-01-04 14:39:10 +00:00
parent 2b04b01986
commit f4c6d3973a
1 changed files with 302 additions and 3 deletions
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305
emacs-23.1-fontdpi.patch
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@ -1,7 +1,283 @@
diff -up emacs-23.1/src/xterm.c.fontdpi emacs-23.1/src/xterm.c
--- emacs-23.1/src/xterm.c.fontdpi 2010-01-04 09:11:45.000000000 +0100
+++ emacs-23.1/src/xterm.c 2010-01-04 11:50:19.627777180 +0100
@@ -10380,17 +10380,31 @@ x_term_init (display_name, xrm_option, r
--- emacs-23.1/src/xterm.c.fontdpi 2010-01-04 15:12:48.367249218 +0100
+++ emacs-23.1/src/xterm.c 2010-01-04 15:14:47.029248464 +0100
@@ -101,6 +101,9 @@ along with GNU Emacs. If not, see <http
#include "gtkutil.h"
#endif
+#include <X11/Xft/Xft.h>
+#include <X11/Xproto.h>
+
#ifdef USE_LUCID
extern int xlwmenu_window_p P_ ((Widget w, Window window));
extern void xlwmenu_redisplay P_ ((Widget));
@@ -5829,6 +5832,237 @@ event_handler_gdk (gxev, ev, data)
}
#endif /* USE_GTK */
+#define SWAP32(nr) (((nr) << 24) | (((nr) << 8) & 0xff0000) \
+ | (((nr) >> 8) & 0xff00) | ((nr) >> 24))
+#define SWAP16(nr) (((nr) << 8) | ((nr) >> 8))
+#define PAD(nr) (((nr) + 3) & ~3)
+
+static int
+parse_xft_dpi (prop, bytes, dpi)
+ unsigned char *prop;
+ unsigned long bytes;
+ double *dpi;
+{
+ Lisp_Object byteorder = Fbyteorder ();
+ int my_bo = XFASTINT (byteorder) == 'B' ? MSBFirst : LSBFirst;
+ int that_bo = prop[0];
+ CARD32 n_settings;
+ int bytes_parsed = 0;
+ int settings_seen = 0;
+ int i = 0;
+
+ /* First 4 bytes is a serial number, skip that. */
+
+ if (bytes < 12) return BadLength;
+ memcpy (&n_settings, prop+8, 4);
+ if (my_bo != that_bo) n_settings = SWAP32 (n_settings);
+ bytes_parsed = 12;
+
+ *dpi = 0;
+
+ while (bytes_parsed+4 < bytes && settings_seen < 6
+ && i < n_settings)
+ {
+ int type = prop[bytes_parsed++];
+ CARD16 nlen;
+ CARD32 vlen, ival = 0;
+ char name[128]; /* The names we are looking for are not this long. */
+ int is_xft;
+ int to_cpy;
+
+ ++i;
+ ++bytes_parsed; /* Padding */
+
+ memcpy (&nlen, prop+bytes_parsed, 2);
+ bytes_parsed += 2;
+ if (my_bo != that_bo) nlen = SWAP16 (nlen);
+ if (bytes_parsed+nlen > bytes) return BadLength;
+ to_cpy = nlen > 127 ? 127 : nlen;
+ memcpy (name, prop+bytes_parsed, to_cpy);
+ name[to_cpy] = '\0';
+
+ bytes_parsed += nlen;
+ bytes_parsed = PAD (bytes_parsed);
+
+ bytes_parsed += 4; /* Skip serial for this value */
+ if (bytes_parsed > bytes) return BadLength;
+
+ is_xft = nlen > 6 && strncmp (name, "Xft/", 4) == 0;
+
+ switch (type)
+ {
+ case 0: /* Integer */
+ if (bytes_parsed+4 > bytes) return BadLength;
+ if (is_xft)
+ {
+ memcpy (&ival, prop+bytes_parsed, 4);
+ if (my_bo != that_bo) ival = SWAP32 (ival);
+ }
+ bytes_parsed += 4;
+ break;
+
+ case 1: /* String */
+ /* No need to parse this */
+ if (bytes_parsed+4 > bytes) return BadLength;
+ memcpy (&vlen, prop+bytes_parsed, 4);
+ bytes_parsed += 4;
+ if (my_bo != that_bo) vlen = SWAP32 (vlen);
+ bytes_parsed += vlen;
+ bytes_parsed = PAD (bytes_parsed);
+ break;
+
+ case 2: /* RGB value */
+ /* No need to parse this */
+ if (bytes_parsed+8 > bytes) return BadLength;
+ bytes_parsed += 8; /* 4 values (r, b, g, alpha), 2 bytes each. */
+ break;
+
+ default: /* Parse Error */
+ return BadValue;
+ }
+
+ if (is_xft)
+ {
+ ++settings_seen;
+ if (strcmp (name, "Xft/DPI") == 0)
+ *dpi = (double)ival/1024.0;
+ }
+ }
+
+ return Success;
+}
+
+static int
+read_xft_dpi (dpyinfo, dpi)
+ struct x_display_info *dpyinfo;
+ double *dpi;
+{
+ long long_len;
+ Atom act_type;
+ int act_form;
+ unsigned long nitems, bytes_after;
+ unsigned char *prop = NULL;
+ Display *dpy = dpyinfo->display;
+ int rc;
+
+ x_catch_errors (dpy);
+ rc = XGetWindowProperty (dpy,
+ dpyinfo->xsettings_window,
+ dpyinfo->Xatom_xsettings_prop,
+ 0, LONG_MAX, False, AnyPropertyType,
+ &act_type, &act_form, &nitems, &bytes_after,
+ &prop);
+
+ if (rc == Success && prop != NULL && act_form == 8 && nitems > 0
+ && act_type == dpyinfo->Xatom_xsettings_prop)
+ {
+ rc = parse_xft_dpi (prop, nitems, dpi);
+ }
+
+ XFree (prop);
+ x_uncatch_errors ();
+ return rc == Success;
+}
+
+static void
+get_prop_window (dpyinfo)
+ struct x_display_info *dpyinfo;
+{
+ Display *dpy = dpyinfo->display;
+ XGrabServer (dpy);
+ dpyinfo->xsettings_window = XGetSelectionOwner (dpy,
+ dpyinfo->Xatom_xsettings_sel);
+ if (dpyinfo->xsettings_window != None)
+ /* Select events so we can detect if window is deleted or if settings
+ are changed. */
+ XSelectInput (dpy, dpyinfo->xsettings_window,
+ PropertyChangeMask|StructureNotifyMask);
+
+ XUngrabServer (dpy);
+}
+
+static void
+apply_xft_settings (dpyinfo, send_event_p)
+ struct x_display_info *dpyinfo;
+ int send_event_p;
+{
+ double dpi;
+ if (!read_xft_dpi (dpyinfo, &dpi))
+ return;
+
+ /* Change the DPI on this display and all frames on the display. */
+ Lisp_Object frame, tail;
+ dpyinfo->resy = dpyinfo->resx = dpi;
+ FOR_EACH_FRAME (tail, frame)
+ if (FRAME_X_P (XFRAME (frame))
+ && FRAME_X_DISPLAY_INFO (XFRAME (frame)) == dpyinfo)
+ XFRAME (frame)->resy = XFRAME (frame)->resx = dpi;
+}
+
+static void
+xft_settings_event (dpyinfo, event)
+ struct x_display_info *dpyinfo;
+ XEvent *event;
+{
+ int check_window_p = 0;
+
+ switch (event->type)
+ {
+ case DestroyNotify:
+ if (dpyinfo->xsettings_window == event->xany.window)
+ check_window_p = 1;
+ break;
+
+ case ClientMessage:
+ if (event->xclient.message_type == dpyinfo->Xatom_xsettings_mgr
+ && event->xclient.data.l[1] == dpyinfo->Xatom_xsettings_sel
+ && event->xclient.window == dpyinfo->root_window)
+ check_window_p = 1;
+ break;
+
+ case PropertyNotify:
+ if (event->xproperty.window == dpyinfo->xsettings_window
+ && event->xproperty.state == PropertyNewValue
+ && event->xproperty.atom == dpyinfo->Xatom_xsettings_prop)
+ {
+ apply_xft_settings (dpyinfo, True);
+ }
+ break;
+ }
+
+ if (check_window_p)
+ {
+ dpyinfo->xsettings_window = None;
+ get_prop_window (dpyinfo);
+ if (dpyinfo->xsettings_window != None)
+ apply_xft_settings (dpyinfo, True);
+ }
+}
+
+static void
+init_xfd_settings (dpyinfo)
+ struct x_display_info *dpyinfo;
+{
+ char sel[64];
+ Display *dpy = dpyinfo->display;
+ BLOCK_INPUT;
+ sprintf (sel, "_XSETTINGS_S%d", XScreenNumberOfScreen (dpyinfo->screen));
+ dpyinfo->Xatom_xsettings_sel = XInternAtom (dpy, sel, False);
+ dpyinfo->Xatom_xsettings_prop = XInternAtom (dpy,
+ "_XSETTINGS_SETTINGS",
+ False);
+ dpyinfo->Xatom_xsettings_mgr = XInternAtom (dpy, "MANAGER", False);
+
+ /* Select events so we can detect client messages sent when selection
+ owner changes. */
+ XSelectInput (dpy, dpyinfo->root_window, StructureNotifyMask);
+
+ get_prop_window (dpyinfo);
+ if (dpyinfo->xsettings_window != None)
+ apply_xft_settings (dpyinfo, False);
+
+ UNBLOCK_INPUT;
+}
/* Handles the XEvent EVENT on display DPYINFO.
@@ -6043,6 +6277,8 @@ handle_one_xevent (dpyinfo, eventp, fini
goto done;
}
+ xft_settings_event (dpyinfo, &event);
+
f = x_any_window_to_frame (dpyinfo, event.xclient.window);
if (!f)
goto OTHER;
@@ -6113,6 +6349,7 @@ handle_one_xevent (dpyinfo, eventp, fini
x_handle_net_wm_state (f, &event.xproperty);
x_handle_property_notify (&event.xproperty);
+ xft_settings_event (dpyinfo, &event);
goto OTHER;
case ReparentNotify:
@@ -7069,6 +7306,10 @@ handle_one_xevent (dpyinfo, eventp, fini
}
goto OTHER;
+ case DestroyNotify:
+ xft_settings_event (dpyinfo, &event);
+ break;
+
default:
OTHER:
#ifdef USE_X_TOOLKIT
@@ -10380,17 +10621,31 @@ x_term_init (display_name, xrm_option, r
dpyinfo->visual, AllocNone);
{
@ -42,3 +318,26 @@ diff -up emacs-23.1/src/xterm.c.fontdpi emacs-23.1/src/xterm.c
dpyinfo->Xatom_wm_protocols
= XInternAtom (dpyinfo->display, "WM_PROTOCOLS", False);
dpyinfo->Xatom_wm_take_focus
@@ -10492,6 +10747,8 @@ x_term_init (display_name, xrm_option, r
xim_initialize (dpyinfo, resource_name);
#endif
+ init_xfd_settings (dpyinfo);
+
#ifdef subprocesses
/* This is only needed for distinguishing keyboard and process input. */
if (connection != 0)
diff -up emacs-23.1/src/xterm.h.fontdpi emacs-23.1/src/xterm.h
--- emacs-23.1/src/xterm.h.fontdpi 2009-06-21 06:38:20.000000000 +0200
+++ emacs-23.1/src/xterm.h 2010-01-04 15:12:48.393248813 +0100
@@ -360,6 +360,10 @@ struct x_display_info
/* Atoms dealing with maximization and fullscreen */
Atom Xatom_net_wm_state, Xatom_net_wm_state_fullscreen_atom,
Xatom_net_wm_state_maximized_horz, Xatom_net_wm_state_maximized_vert;
+
+ /* XSettings atoms and windows. */
+ Atom Xatom_xsettings_sel, Xatom_xsettings_prop, Xatom_xsettings_mgr;
+ Window xsettings_window;
};
#ifdef HAVE_X_I18N