Mercurial > hg > xemacs-beta
view src/redisplay-gtk.c @ 5566:4654c01af32b
Improve the implementation, documentation of #'labels, #'flet.
lisp/ChangeLog addition:
2011-09-07 Aidan Kehoe <kehoea@parhasard.net>
* bytecomp.el:
* bytecomp.el (for-effect): Move this earlier in the file, it's
referenced in byte-compile-initial-macro-environment.
* bytecomp.el (byte-compile-initial-macro-environment):
In the byte-compile-macro-environment definition for #'labels, put
off the compiling the lambda bodies until the point where the rest
of the form is being compiled, allowing the lambda bodies to
access appropriate values for byte-compile-bound-variables, and
reducing excessive warning about free variables.
Add a byte-compile-macro-environment definition for #'flet. This
modifies byte-compile-function-environment appropriately, and
warns about bindings of functions that have macro definitions in
the current environment, about functions that have byte codes, and
about functions that have byte-compile methods (which may not do
what the user wants at runtime).
* bytecomp.el (byte-compile-funcall):
If FUNCTION is constant, call #'byte-compile-callargs-warn if
that's appropriate, giving warnings about problems with calling
functions bound with #'labels.
* cl-macs.el:
* cl-macs.el (flet):
Mention the main difference from Common Lisp, that the bindings
are dynamic, not lexical. Counsel the use of #'labels, not #'flet,
for this and other reasons. Explain the limited single use case for
#'flet. Cross-reference to bytecomp.el in a comment.
* cl-macs.el (labels):
Go into detail on which functions may be called from
where. Explain how to access the function definition of a label
within FORM. Add a comment cross-referencing to bytecomp.el.
man/ChangeLog addition:
2011-09-07 Aidan Kehoe <kehoea@parhasard.net>
* cl.texi (Function Bindings):
Move #'labels first, describe it in more detail, explaining that
it is to be preferred over #'flet, and explaining why.
Explain that dynamic bindings with #'flet will also not work when
functions are accessed through their bytecodes.
author | Aidan Kehoe <kehoea@parhasard.net> |
---|---|
date | Wed, 07 Sep 2011 16:26:45 +0100 |
parents | 308d34e9f07d |
children | 574f0cded429 |
line wrap: on
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/* GTK output and frame manipulation routines. Copyright (C) 1994, 1995 Board of Trustees, University of Illinois. Copyright (C) 1994 Lucid, Inc. Copyright (C) 1995 Sun Microsystems, Inc. Copyright (C) 2002, 2003 Ben Wing. This file is part of XEmacs. XEmacs is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. XEmacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with XEmacs. If not, see <http://www.gnu.org/licenses/>. */ /* Synched up with: Not in FSF. */ #define THIS_IS_GTK #include "redisplay-xlike-inc.c" /***************************************************************************** Draw a shadow around the given area using the standard theme engine routines. ****************************************************************************/ static void XLIKE_bevel_area (struct window *w, face_index UNUSED (findex), int x, int y, int width, int height, int shadow_thickness, int UNUSED (edges), enum edge_style style) { struct frame *f = XFRAME (w->frame); GdkWindow *x_win = GET_GTK_WIDGET_WINDOW (FRAME_GTK_TEXT_WIDGET (f)); GtkStyle *gstyle = FRAME_GTK_TEXT_WIDGET (f)->style; GtkShadowType stype; if (shadow_thickness == 0) stype = GTK_SHADOW_NONE; else switch (style) { case EDGE_BEVEL_IN: style = GTK_SHADOW_IN; break; case EDGE_BEVEL_OUT: style = GTK_SHADOW_OUT; break; case EDGE_ETCHED_IN: style = GTK_SHADOW_ETCHED_IN; break; case EDGE_ETCHED_OUT: style = GTK_SHADOW_ETCHED_OUT; break; default: ABORT (); style = GTK_SHADOW_OUT; } /* Do we want to have some magic constants to set GTK_SHADOW_ETCHED_IN or GTK_SHADOW_ETCHED_OUT? */ gtk_paint_shadow (gstyle, x_win, GTK_STATE_NORMAL, stype, NULL, FRAME_GTK_TEXT_WIDGET (f), "modeline", x, y, width, height); } /* Make audible bell. */ static void XLIKE_ring_bell (struct device *UNUSED (d), int volume, int UNUSED (pitch), int UNUSED (duration)) { /* Gdk does not allow us to control the duration / pitch / volume */ if (volume > 0) { gdk_beep (); } } /* This makes me feel incredibly dirty... but there is no other way to get this done right other than calling clear_area before every single $#!%@ing piece of text, which I do NOT want to do. */ #define USE_X_SPECIFIC_DRAW_ROUTINES 1 #include "sysgdkx.h" static void gdk_draw_text_image (GdkDrawable *drawable, GdkFont *font, GdkGC *gc, gint x, gint y, const gchar *text, gint text_length) { #if !USE_X_SPECIFIC_DRAW_ROUTINES int width = gdk_text_measure (font, text, text_length); int height = gdk_text_height (font, text, text_length); gdk_draw_rectangle (drawable, gc, TRUE, x, y, width, height); gdk_draw_text (drawable, font, gc, x, y, text, text_length); #else GdkWindowPrivate *drawable_private; GdkFontPrivate *font_private; GdkGCPrivate *gc_private; g_return_if_fail (drawable != NULL); g_return_if_fail (font != NULL); g_return_if_fail (gc != NULL); g_return_if_fail (text != NULL); drawable_private = (GdkWindowPrivate*) drawable; if (drawable_private->destroyed) return; gc_private = (GdkGCPrivate*) gc; font_private = (GdkFontPrivate*) font; if (font->type == GDK_FONT_FONT) { XFontStruct *xfont = (XFontStruct *) font_private->xfont; XSetFont(drawable_private->xdisplay, gc_private->xgc, xfont->fid); if ((xfont->min_byte1 == 0) && (xfont->max_byte1 == 0)) { XDrawImageString (drawable_private->xdisplay, drawable_private->xwindow, gc_private->xgc, x, y, text, text_length); } else { XDrawImageString16 (drawable_private->xdisplay, drawable_private->xwindow, gc_private->xgc, x, y, (XChar2b *) text, text_length / 2); } } else if (font->type == GDK_FONT_FONTSET) { XFontSet fontset = (XFontSet) font_private->xfont; XmbDrawImageString (drawable_private->xdisplay, drawable_private->xwindow, fontset, gc_private->xgc, x, y, text, text_length); } else g_error("undefined font type\n"); #endif } static void our_draw_bitmap (GdkDrawable *drawable, GdkGC *gc, GdkPixmap *src, gint xsrc, gint ysrc, gint xdest, gint ydest, gint width, gint height) { GdkWindowPrivate *drawable_private; GdkWindowPrivate *src_private; GdkGCPrivate *gc_private; g_return_if_fail (drawable != NULL); g_return_if_fail (src != NULL); g_return_if_fail (gc != NULL); drawable_private = (GdkWindowPrivate*) drawable; src_private = (GdkWindowPrivate*) src; if (drawable_private->destroyed || src_private->destroyed) return; gc_private = (GdkGCPrivate*) gc; if (width == -1) width = src_private->width; if (height == -1) height = src_private->height; XCopyPlane (drawable_private->xdisplay, src_private->xwindow, drawable_private->xwindow, gc_private->xgc, xsrc, ysrc, width, height, xdest, ydest, 1L); }