Mercurial > hg > xemacs-beta
view lwlib/xlwtabs.c @ 665:fdefd0186b75
[xemacs-hg @ 2001-09-20 06:28:42 by ben]
The great integral types renaming.
The purpose of this is to rationalize the names used for various
integral types, so that they match their intended uses and follow
consist conventions, and eliminate types that were not semantically
different from each other.
The conventions are:
-- All integral types that measure quantities of anything are
signed. Some people disagree vociferously with this, but their
arguments are mostly theoretical, and are vastly outweighed by
the practical headaches of mixing signed and unsigned values,
and more importantly by the far increased likelihood of
inadvertent bugs: Because of the broken "viral" nature of
unsigned quantities in C (operations involving mixed
signed/unsigned are done unsigned, when exactly the opposite is
nearly always wanted), even a single error in declaring a
quantity unsigned that should be signed, or even the even more
subtle error of comparing signed and unsigned values and
forgetting the necessary cast, can be catastrophic, as
comparisons will yield wrong results. -Wsign-compare is turned
on specifically to catch this, but this tends to result in a
great number of warnings when mixing signed and unsigned, and
the casts are annoying. More has been written on this
elsewhere.
-- All such quantity types just mentioned boil down to EMACS_INT,
which is 32 bits on 32-bit machines and 64 bits on 64-bit
machines. This is guaranteed to be the same size as Lisp
objects of type `int', and (as far as I can tell) of size_t
(unsigned!) and ssize_t. The only type below that is not an
EMACS_INT is Hashcode, which is an unsigned value of the same
size as EMACS_INT.
-- Type names should be relatively short (no more than 10
characters or so), with the first letter capitalized and no
underscores if they can at all be avoided.
-- "count" == a zero-based measurement of some quantity. Includes
sizes, offsets, and indexes.
-- "bpos" == a one-based measurement of a position in a buffer.
"Charbpos" and "Bytebpos" count text in the buffer, rather than
bytes in memory; thus Bytebpos does not directly correspond to
the memory representation. Use "Membpos" for this.
-- "Char" refers to internal-format characters, not to the C type
"char", which is really a byte.
-- For the actual name changes, see the script below.
I ran the following script to do the conversion. (NOTE: This script
is idempotent. You can safely run it multiple times and it will
not screw up previous results -- in fact, it will do nothing if
nothing has changed. Thus, it can be run repeatedly as necessary
to handle patches coming in from old workspaces, or old branches.)
There are two tags, just before and just after the change:
`pre-integral-type-rename' and `post-integral-type-rename'. When
merging code from the main trunk into a branch, the best thing to
do is first merge up to `pre-integral-type-rename', then apply the
script and associated changes, then merge from
`post-integral-type-change' to the present. (Alternatively, just do
the merging in one operation; but you may then have a lot of
conflicts needing to be resolved by hand.)
Script `fixtypes.sh' follows:
----------------------------------- cut ------------------------------------
files="*.[ch] s/*.h m/*.h config.h.in ../configure.in Makefile.in.in ../lib-src/*.[ch] ../lwlib/*.[ch]"
gr Memory_Count Bytecount $files
gr Lstream_Data_Count Bytecount $files
gr Element_Count Elemcount $files
gr Hash_Code Hashcode $files
gr extcount bytecount $files
gr bufpos charbpos $files
gr bytind bytebpos $files
gr memind membpos $files
gr bufbyte intbyte $files
gr Extcount Bytecount $files
gr Bufpos Charbpos $files
gr Bytind Bytebpos $files
gr Memind Membpos $files
gr Bufbyte Intbyte $files
gr EXTCOUNT BYTECOUNT $files
gr BUFPOS CHARBPOS $files
gr BYTIND BYTEBPOS $files
gr MEMIND MEMBPOS $files
gr BUFBYTE INTBYTE $files
gr MEMORY_COUNT BYTECOUNT $files
gr LSTREAM_DATA_COUNT BYTECOUNT $files
gr ELEMENT_COUNT ELEMCOUNT $files
gr HASH_CODE HASHCODE $files
----------------------------------- cut ------------------------------------
`fixtypes.sh' is a Bourne-shell script; it uses 'gr':
----------------------------------- cut ------------------------------------
#!/bin/sh
# Usage is like this:
# gr FROM TO FILES ...
# globally replace FROM with TO in FILES. FROM and TO are regular expressions.
# backup files are stored in the `backup' directory.
from="$1"
to="$2"
shift 2
echo ${1+"$@"} | xargs global-replace "s/$from/$to/g"
----------------------------------- cut ------------------------------------
`gr' in turn uses a Perl script to do its real work,
`global-replace', which follows:
----------------------------------- cut ------------------------------------
: #-*- Perl -*-
### global-modify --- modify the contents of a file by a Perl expression
## Copyright (C) 1999 Martin Buchholz.
## Copyright (C) 2001 Ben Wing.
## Authors: Martin Buchholz <martin@xemacs.org>, Ben Wing <ben@xemacs.org>
## Maintainer: Ben Wing <ben@xemacs.org>
## Current Version: 1.0, May 5, 2001
# This program 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 2, or (at your option)
# any later version.
#
# This program 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; see the file COPYING. If not, write to the Free
# Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, USA.
eval 'exec perl -w -S $0 ${1+"$@"}'
if 0;
use strict;
use FileHandle;
use Carp;
use Getopt::Long;
use File::Basename;
(my $myName = $0) =~ s@.*/@@; my $usage="
Usage: $myName [--help] [--backup-dir=DIR] [--line-mode] [--hunk-mode]
PERLEXPR FILE ...
Globally modify a file, either line by line or in one big hunk.
Typical usage is like this:
[with GNU print, GNU xargs: guaranteed to handle spaces, quotes, etc.
in file names]
find . -name '*.[ch]' -print0 | xargs -0 $0 's/\bCONST\b/const/g'\n
[with non-GNU print, xargs]
find . -name '*.[ch]' -print | xargs $0 's/\bCONST\b/const/g'\n
The file is read in, either line by line (with --line-mode specified)
or in one big hunk (with --hunk-mode specified; it's the default), and
the Perl expression is then evalled with \$_ set to the line or hunk of
text, including the terminating newline if there is one. It should
destructively modify the value there, storing the changed result in \$_.
Files in which any modifications are made are backed up to the directory
specified using --backup-dir, or to `backup' by default. To disable this,
use --backup-dir= with no argument.
Hunk mode is the default because it is MUCH MUCH faster than line-by-line.
Use line-by-line only when it matters, e.g. you want to do a replacement
only once per line (the default without the `g' argument). Conversely,
when using hunk mode, *ALWAYS* use `g'; otherwise, you will only make one
replacement in the entire file!
";
my %options = ();
$Getopt::Long::ignorecase = 0;
&GetOptions (
\%options,
'help', 'backup-dir=s', 'line-mode', 'hunk-mode',
);
die $usage if $options{"help"} or @ARGV <= 1;
my $code = shift;
die $usage if grep (-d || ! -w, @ARGV);
sub SafeOpen {
open ((my $fh = new FileHandle), $_[0]);
confess "Can't open $_[0]: $!" if ! defined $fh;
return $fh;
}
sub SafeClose {
close $_[0] or confess "Can't close $_[0]: $!";
}
sub FileContents {
my $fh = SafeOpen ("< $_[0]");
my $olddollarslash = $/;
local $/ = undef;
my $contents = <$fh>;
$/ = $olddollarslash;
return $contents;
}
sub WriteStringToFile {
my $fh = SafeOpen ("> $_[0]");
binmode $fh;
print $fh $_[1] or confess "$_[0]: $!\n";
SafeClose $fh;
}
foreach my $file (@ARGV) {
my $changed_p = 0;
my $new_contents = "";
if ($options{"line-mode"}) {
my $fh = SafeOpen $file;
while (<$fh>) {
my $save_line = $_;
eval $code;
$changed_p = 1 if $save_line ne $_;
$new_contents .= $_;
}
} else {
my $orig_contents = $_ = FileContents $file;
eval $code;
if ($_ ne $orig_contents) {
$changed_p = 1;
$new_contents = $_;
}
}
if ($changed_p) {
my $backdir = $options{"backup-dir"};
$backdir = "backup" if !defined ($backdir);
if ($backdir) {
my ($name, $path, $suffix) = fileparse ($file, "");
my $backfulldir = $path . $backdir;
my $backfile = "$backfulldir/$name";
mkdir $backfulldir, 0755 unless -d $backfulldir;
print "modifying $file (original saved in $backfile)\n";
rename $file, $backfile;
}
WriteStringToFile ($file, $new_contents);
}
}
----------------------------------- cut ------------------------------------
In addition to those programs, I needed to fix up a few other
things, particularly relating to the duplicate definitions of
types, now that some types merged with others. Specifically:
1. in lisp.h, removed duplicate declarations of Bytecount. The
changed code should now look like this: (In each code snippet
below, the first and last lines are the same as the original, as
are all lines outside of those lines. That allows you to locate
the section to be replaced, and replace the stuff in that
section, verifying that there isn't anything new added that
would need to be kept.)
--------------------------------- snip -------------------------------------
/* Counts of bytes or chars */
typedef EMACS_INT Bytecount;
typedef EMACS_INT Charcount;
/* Counts of elements */
typedef EMACS_INT Elemcount;
/* Hash codes */
typedef unsigned long Hashcode;
/* ------------------------ dynamic arrays ------------------- */
--------------------------------- snip -------------------------------------
2. in lstream.h, removed duplicate declaration of Bytecount.
Rewrote the comment about this type. The changed code should
now look like this:
--------------------------------- snip -------------------------------------
#endif
/* The have been some arguments over the what the type should be that
specifies a count of bytes in a data block to be written out or read in,
using Lstream_read(), Lstream_write(), and related functions.
Originally it was long, which worked fine; Martin "corrected" these to
size_t and ssize_t on the grounds that this is theoretically cleaner and
is in keeping with the C standards. Unfortunately, this practice is
horribly error-prone due to design flaws in the way that mixed
signed/unsigned arithmetic happens. In fact, by doing this change,
Martin introduced a subtle but fatal error that caused the operation of
sending large mail messages to the SMTP server under Windows to fail.
By putting all values back to be signed, avoiding any signed/unsigned
mixing, the bug immediately went away. The type then in use was
Lstream_Data_Count, so that it be reverted cleanly if a vote came to
that. Now it is Bytecount.
Some earlier comments about why the type must be signed: This MUST BE
SIGNED, since it also is used in functions that return the number of
bytes actually read to or written from in an operation, and these
functions can return -1 to signal error.
Note that the standard Unix read() and write() functions define the
count going in as a size_t, which is UNSIGNED, and the count going
out as an ssize_t, which is SIGNED. This is a horrible design
flaw. Not only is it highly likely to lead to logic errors when a
-1 gets interpreted as a large positive number, but operations are
bound to fail in all sorts of horrible ways when a number in the
upper-half of the size_t range is passed in -- this number is
unrepresentable as an ssize_t, so code that checks to see how many
bytes are actually written (which is mandatory if you are dealing
with certain types of devices) will get completely screwed up.
--ben
*/
typedef enum lstream_buffering
--------------------------------- snip -------------------------------------
3. in dumper.c, there are four places, all inside of switch()
statements, where XD_BYTECOUNT appears twice as a case tag. In
each case, the two case blocks contain identical code, and you
should *REMOVE THE SECOND* and leave the first.
| author | ben |
|---|---|
| date | Thu, 20 Sep 2001 06:31:11 +0000 |
| parents | b39c14581166 |
| children | 04bc9d2f42c7 |
line wrap: on
line source
/* Tabs Widget for XEmacs. Copyright (C) 1999 Edward A. Falk 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 2, 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; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* Synched up with: Tabs.c 1.27. #### This file contains essential XEmacs related fixes to the original verison of the Tabs widget. Be VERY careful about syncing if you ever update to a more recent version. In general this is probably now a bad idea. */ /* * Tabs.c - Index Tabs composite widget * * Author: Edward A. Falk * falk@falconer.vip.best.com * * Date: July 29, 1997 * * * Overall layout of this widget is as follows: * * ________ ,---------. _________ * | label || Label || Label | \ tabs * |________|| ||_________| / * |+----------------------------+| \ * || || | * || child widget window || > frame * |+----------------------------+| | * +------------------------------+ / * * The height of the tabs includes the shadow width, top and bottom * margins, and the height of the text. * * The height of the frame includes the top and bottom shadow width and the * size of the child widget window. * * The tabs overlap the frame and each other vertically by the shadow * width, so that when the topmost tab is drawn, it obliterates part of * the frame. */ /* * TODO: min child height = tab height */ #include <config.h> #include <stdio.h> #include <X11/Xlib.h> #include <X11/IntrinsicP.h> #include <X11/StringDefs.h> #include "lwlib-internal.h" #include "../src/xmu.h" #include "xlwtabsP.h" #include "xlwgcs.h" #define MIN_WID 10 #define MIN_HGT 10 #define INDENT 3 /* tabs indented from edge by this much */ #define SPACING 0 /* distance between tabs */ #define SHADWID 1 /* default shadow width */ #define TABDELTA 2 /* top tab grows this many pixels */ #define TABLDELTA 2 /* top tab label offset this many pixels */ /**************************************************************** * * IndexTabs Resources * ****************************************************************/ static char defaultTranslations[] = "\ <BtnUp>: select() \n\ <FocusIn>: highlight() \n\ <FocusOut>: unhighlight() \n\ <Key>Page_Up: page(up) \n\ <Key>KP_Page_Up: page(up) \n\ <Key>Prior: page(up) \n\ <Key>KP_Prior: page(up) \n\ <Key>Page_Down: page(down) \n\ <Key>KP_Page_Down: page(down) \n\ <Key>Next: page(down) \n\ <Key>KP_Next: page(down) \n\ <Key>Home: page(home) \n\ <Key>KP_Home: page(home) \n\ <Key>End: page(end) \n\ <Key>KP_End: page(end) \n\ <Key>Up: highlight(up) \n\ <Key>KP_Up: highlight(up) \n\ <Key>Down: highlight(down) \n\ <Key>KP_Down: highlight(down) \n\ <Key> : page(select) \n\ " ; static char accelTable[] = " #augment\n\ <Key>Page_Up: page(up) \n\ <Key>KP_Page_Up: page(up) \n\ <Key>Prior: page(up) \n\ <Key>KP_Prior: page(up) \n\ <Key>Page_Down: page(down) \n\ <Key>KP_Page_Down: page(down) \n\ <Key>Next: page(down) \n\ <Key>KP_Next: page(down) \n\ <Key>Home: page(home) \n\ <Key>KP_Home: page(home) \n\ <Key>End: page(end) \n\ <Key>KP_End: page(end) \n\ <Key>Up: highlight(up) \n\ <Key>KP_Up: highlight(up) \n\ <Key>Down: highlight(down) \n\ <Key>KP_Down: highlight(down) \n\ <Key> : page(select) \n\ " ; static XtAccelerators defaultAccelerators ; /* #### Never used */ #define offset(field) XtOffsetOf(TabsRec, tabs.field) static XtResource resources[] = { {XtNselectInsensitive, XtCSelectInsensitive, XtRBoolean, sizeof(Boolean), offset(selectInsensitive), XtRImmediate, (XtPointer) True}, {XtNfont, XtCFont, XtRFontStruct, sizeof(XFontStruct *), offset(font), XtRString, (XtPointer) XtDefaultFont}, {XtNinternalWidth, XtCWidth, XtRDimension, sizeof(Dimension), offset(internalWidth), XtRImmediate, (XtPointer)4 }, {XtNinternalHeight, XtCHeight, XtRDimension, sizeof(Dimension), offset(internalHeight), XtRImmediate, (XtPointer)4 }, {XtNborderWidth, XtCBorderWidth, XtRDimension, sizeof(Dimension), XtOffsetOf(RectObjRec,rectangle.border_width), XtRImmediate, (XtPointer)0}, {XtNtopWidget, XtCTopWidget, XtRWidget, sizeof(Widget), offset(topWidget), XtRImmediate, NULL}, {XtNcallback, XtCCallback, XtRCallback, sizeof(XtPointer), offset(callbacks), XtRCallback, NULL}, {XtNpopdownCallback, XtCCallback, XtRCallback, sizeof(XtPointer), offset(popdownCallbacks), XtRCallback, NULL}, {XtNbeNiceToColormap, XtCBeNiceToColormap, XtRBoolean, sizeof(Boolean), offset(be_nice_to_cmap), XtRImmediate, (XtPointer) True}, {XtNtopShadowContrast, XtCTopShadowContrast, XtRInt, sizeof(int), offset(top_shadow_contrast), XtRImmediate, (XtPointer) 20}, {XtNbottomShadowContrast, XtCBottomShadowContrast, XtRInt, sizeof(int), offset(bot_shadow_contrast), XtRImmediate, (XtPointer) 40}, {XtNinsensitiveContrast, XtCInsensitiveContrast, XtRInt, sizeof(int), offset(insensitive_contrast), XtRImmediate, (XtPointer) 33}, {XtNaccelerators, XtCAccelerators, XtRAcceleratorTable,sizeof(XtTranslations), XtOffsetOf(TabsRec,core.accelerators), XtRString, accelTable}, }; #undef offset /* constraint resources */ #define offset(field) XtOffsetOf(TabsConstraintsRec, tabs.field) static XtResource tabsConstraintResources[] = { {XtNtabLabel, XtCLabel, XtRString, sizeof(String), offset(label), XtRString, NULL}, {XtNtabLeftBitmap, XtCLeftBitmap, XtRBitmap, sizeof(Pixmap), offset(left_bitmap), XtRImmediate, None}, {XtNtabForeground, XtCForeground, XtRPixel, sizeof(Pixel), offset(foreground), XtRString, (XtPointer) XtDefaultForeground}, {XtNresizable, XtCResizable, XtRBoolean, sizeof(Boolean), offset(resizable), XtRImmediate, (XtPointer) True}, } ; #undef offset #if !NeedFunctionPrototypes /* FORWARD REFERENCES: */ /* member functions */ static void TabsClassInit(); static void TabsInit(); static void TabsResize(); static void TabsExpose(); static void TabsDestroy(); static void TabsRealize(); static Boolean TabsSetValues(); static Boolean TabsAcceptFocus(); static XtGeometryResult TabsQueryGeometry(); static XtGeometryResult TabsGeometryManager(); static void TabsChangeManaged(); static void TabsConstraintInitialize() ; static Boolean TabsConstraintSetValues() ; /* action procs */ static void TabsSelect() ; static void TabsPage() ; static void TabsHighlight() ; static void TabsUnhighlight() ; /* internal privates */ static void TabsAllocGCs() ; /* get rendering GCs */ static void TabsFreeGCs() ; /* return rendering GCs */ static void DrawTabs() ; /* draw all tabs */ static void DrawTab() ; /* draw one index tab */ static void DrawFrame() ; /* draw frame around contents */ static void DrawTrim() ; /* draw trim around a tab */ static void DrawBorder() ; /* draw border */ static void DrawHighlight() ; /* draw highlight */ static void UndrawTab() ; /* undraw interior of a tab */ static void TabWidth() ; /* recompute tab size */ static void GetPreferredSizes() ; /* query all children for their sizes */ static void MaxChild() ; /* find max preferred child size */ static int PreferredSize() ; /* compute preferred size */ static int PreferredSize2() ; /* compute preferred size */ static int PreferredSize3() ; /* compute preferred size */ static void MakeSizeRequest() ; /* try to change size */ static void getBitmapInfo() ; static int TabLayout() ; /* lay out tabs */ static void TabsShuffleRows() ; /* bring current tab to bottom row */ static void TabsAllocFgGC() ; static void TabsAllocGreyGC() ; #else static void TabsClassInit(void) ; static void TabsInit( Widget req, Widget new, ArgList, Cardinal *nargs) ; static void TabsConstraintInitialize(Widget, Widget, ArgList, Cardinal *) ; static void TabsRealize(Widget, Mask *, XSetWindowAttributes *) ; static void TabsDestroy( Widget w) ; static void TabsResize( Widget w) ; static void TabsExpose( Widget w, XEvent *event, Region region) ; static Boolean TabsSetValues(Widget, Widget, Widget, ArgList, Cardinal *) ; static Boolean TabsAcceptFocus(Widget, Time *); static Boolean TabsConstraintSetValues(Widget, Widget, Widget, ArgList, Cardinal *) ; static XtGeometryResult TabsQueryGeometry(Widget, XtWidgetGeometry *, XtWidgetGeometry *) ; static XtGeometryResult TabsGeometryManager(Widget, XtWidgetGeometry *, XtWidgetGeometry *) ; static void TabsChangeManaged( Widget w) ; static void TabsSelect(Widget, XEvent *, String *, Cardinal *) ; static void TabsPage(Widget, XEvent *, String *, Cardinal *) ; static void TabsHighlight(Widget, XEvent *, String *, Cardinal *) ; static void TabsUnhighlight(Widget, XEvent *, String *, Cardinal *) ; static void DrawTabs( TabsWidget tw, Bool labels) ; static void DrawTab( TabsWidget tw, Widget child, Bool labels) ; static void DrawFrame( TabsWidget tw) ; static void DrawTrim( TabsWidget, int x, int y, int wid, int hgt, Bool bottom, Bool undraw) ; static void DrawBorder( TabsWidget tw, Widget child, Bool undraw) ; static void DrawHighlight( TabsWidget tw, Widget child, Bool undraw) ; static void UndrawTab( TabsWidget tw, Widget child) ; static void TabWidth( Widget w) ; static int TabLayout( TabsWidget, Dimension wid, Dimension hgt, Dimension *r_hgt, Bool query_only) ; static void GetPreferredSizes(TabsWidget) ; static void MaxChild(TabsWidget, Widget except, Dimension, Dimension) ; static void TabsShuffleRows( TabsWidget tw) ; static int PreferredSize( TabsWidget, Dimension *reply_width, Dimension *reply_height, Dimension *reply_cw, Dimension *reply_ch) ; static int PreferredSize2( TabsWidget, Dimension cw, Dimension ch, Dimension *rw, Dimension *rh) ; static int PreferredSize3( TabsWidget, Dimension wid, Dimension hgt, Dimension *rw, Dimension *rh) ; static void MakeSizeRequest(TabsWidget) ; static void TabsAllocGCs(TabsWidget) ; static void TabsFreeGCs(TabsWidget) ; static void getBitmapInfo( TabsWidget tw, TabsConstraints tab) ; static void TabsAllocFgGC( TabsWidget tw) ; static void TabsAllocGreyGC( TabsWidget tw) ; #endif #define AddRect(i,xx,yy,w,h) \ do{rects[(i)].x=(xx); rects[i].y=(yy); \ rects[i].width=(w); rects[i].height=(h);}while(0) static XtActionsRec actionsList[] = { {"select", TabsSelect}, {"page", TabsPage}, {"highlight", TabsHighlight}, {"unhighlight", TabsUnhighlight}, } ; /**************************************************************** * * Full class record constant * ****************************************************************/ #ifndef NEED_MOTIF #define SuperClass (&constraintClassRec) #else #define SuperClass (&xmManagerClassRec) #endif TabsClassRec tabsClassRec = { { /* core_class fields */ /* superclass */ (WidgetClass) SuperClass, /* class_name */ "Tabs", /* widget_size */ sizeof(TabsRec), /* class_initialize */ TabsClassInit, /* class_part_init */ NULL, /* TODO? */ /* class_inited */ FALSE, /* initialize */ TabsInit, /* initialize_hook */ NULL, /* realize */ TabsRealize, /* actions */ actionsList, /* num_actions */ XtNumber(actionsList), /* resources */ resources, /* num_resources */ XtNumber(resources), /* xrm_class */ NULLQUARK, /* compress_motion */ TRUE, #if XtSpecificationRelease < 6 /* compress_exposure */ XtExposeCompressMaximal, #else /* compress_exposure */ XtExposeCompressMaximal|XtExposeNoRegion, #endif /* compress_enterleave*/ TRUE, /* visible_interest */ TRUE, /* destroy */ TabsDestroy, /* resize */ TabsResize, /* expose */ TabsExpose, /* set_values */ TabsSetValues, /* set_values_hook */ NULL, /* set_values_almost */ XtInheritSetValuesAlmost, /* get_values_hook */ NULL, /* accept_focus */ TabsAcceptFocus, /* version */ XtVersion, /* callback_private */ NULL, /* tm_table */ defaultTranslations, /* query_geometry */ TabsQueryGeometry, /* display_accelerator*/ XtInheritDisplayAccelerator, /* extension */ NULL }, { /* composite_class fields */ /* geometry_manager */ TabsGeometryManager, /* change_managed */ TabsChangeManaged, /* insert_child */ XtInheritInsertChild, /* TODO? */ /* delete_child */ XtInheritDeleteChild, /* TODO? */ /* extension */ NULL }, { /* constraint_class fields */ /* subresources */ tabsConstraintResources, /* subresource_count */ XtNumber(tabsConstraintResources), /* constraint_size */ sizeof(TabsConstraintsRec), /* initialize */ TabsConstraintInitialize, /* destroy */ NULL, /* set_values */ TabsConstraintSetValues, /* extension */ NULL, }, #ifdef NEED_MOTIF /* Manager Class fields */ { /* translations */ NULL, /* syn_resources */ NULL, /* num_syn_resources */ 0, /* syn_constraint_resources */ NULL, /* num_syn_constraint_resources */ 0, /* parent_process */ XmInheritParentProcess, /* extension */ NULL }, #endif { /* Tabs class fields */ /* extension */ NULL, } }; WidgetClass tabsWidgetClass = (WidgetClass)&tabsClassRec; #define TabsNumChildren(tw) (((TabsWidget)tw)->composite.num_children) #define TabVisible(tab) \ (XtIsManaged(tab) && \ ((TabsConstraints)((tab)->core.constraints))->tabs.visible) /**************************************************************** * * Member Procedures * ****************************************************************/ static void TabsClassInit(void) { defaultAccelerators = XtParseAcceleratorTable(accelTable) ; /* TODO: register converter for labels? */ } /* Init a newly created tabs widget. Compute height of tabs * and optionally compute size of widget. */ /* ARGSUSED */ static void TabsInit(Widget request, Widget new, ArgList args, Cardinal *num_args) { TabsWidget newTw = (TabsWidget)new; newTw->tabs.numRows = 0 ; newTw->tabs.realRows = 0; GetPreferredSizes(newTw) ; /* height is easy, it's the same for all tabs: * TODO: font height + height of tallest bitmap. */ newTw->tabs.tab_height = 2 * newTw->tabs.internalHeight + SHADWID ; if( newTw->tabs.font != NULL ) newTw->tabs.tab_height += newTw->tabs.font->max_bounds.ascent + newTw->tabs.font->max_bounds.descent ; /* GC allocation is deferred until XtRealize() */ /* if size not explicitly set, set it to our preferred size now. */ if( request->core.width == 0 || request->core.height == 0 ) { Dimension w,h ; PreferredSize(newTw, &w, &h, NULL,NULL) ; if( request->core.width == 0 ) new->core.width = w ; if( request->core.height == 0 ) new->core.height = h ; XtClass(new)->core_class.resize(new) ; } /* defer GC allocation, etc., until Realize() time. */ newTw->tabs.foregroundGC = newTw->tabs.backgroundGC = newTw->tabs.greyGC = newTw->tabs.topGC = newTw->tabs.botGC = None ; newTw->tabs.grey50 = None ; newTw->tabs.needs_layout = False ; newTw->tabs.hilight = NULL ; #ifdef NEED_MOTIF newTw->manager.navigation_type = XmTAB_GROUP ; newTw->manager.traversal_on = True ; #endif } /* Init the constraint part of a new tab child. Compute the * size of the tab. */ /* ARGSUSED */ static void TabsConstraintInitialize(Widget request, Widget new, ArgList args, Cardinal *num_args) { TabsConstraints tab = (TabsConstraints) new->core.constraints ; tab->tabs.greyAlloc = False ; /* defer allocation of pixel */ tab->tabs.visible = False ; getBitmapInfo((TabsWidget)XtParent(new), tab) ; TabWidth(new) ; } /* Called when tabs widget first realized. Create the window * and allocate the GCs */ static void TabsRealize(Widget w, Mask *valueMask, XSetWindowAttributes *attributes) { TabsWidget tw = (TabsWidget) w; attributes->bit_gravity = NorthWestGravity; *valueMask |= CWBitGravity; SuperClass->core_class.realize(w, valueMask, attributes); TabsAllocGCs(tw) ; } static void TabsDestroy(Widget w) { TabsFreeGCs((TabsWidget)w) ; } /* Parent has resized us. This will require that the tabs be * laid out again. */ static void TabsResize(Widget w) { TabsWidget tw = (TabsWidget) w; int i ; int num_children = tw->composite.num_children ; Widget *childP ; TabsConstraints tab ; /* #### unused */ Dimension cw,ch,bw ; /* Our size has now been dictated by the parent. Lay out the * tabs, lay out the frame, lay out the children. Remember * that the tabs overlap each other and the frame by shadowWidth. * Also, the top tab is larger than the others, so if there's only * one row, the widget must be made taller to accommodate this. * * Once the tabs are laid out, if there is more than one * row, we may need to shuffle the rows to bring the top tab * to the bottom row. */ tw->tabs.needs_layout = False ; if( num_children > 0 && tw->composite.children != NULL ) { /* Loop through the tabs and assign rows & x positions */ (void) TabLayout(tw, tw->core.width, tw->core.height, NULL, False) ; num_children = TabsNumChildren (tw); /* assign a top widget, bring it to bottom row. */ TabsShuffleRows(tw) ; /* now assign child positions & sizes. Positions are all the * same: just inside the frame. Sizes are also all the same. */ tw->tabs.child_width = cw = tw->core.width - 2 * SHADWID ; tw->tabs.child_height = ch = tw->core.height < (tw->tabs.tab_total + 2 * SHADWID) ? 0 : tw->core.height - tw->tabs.tab_total - 2 * SHADWID ; for(i=0, childP=tw->composite.children; i < num_children; ++i, ++childP) if( XtIsManaged(*childP) ) { tab = (TabsConstraints) (*childP)->core.constraints ; bw = (*childP)->core.border_width ; /* Don't do anything if we can't see any of the child. */ if (ch >= bw*2 && ch > 0 && cw >= bw*2 && cw > 0) XtConfigureWidget(*childP, SHADWID,tw->tabs.tab_total+SHADWID, cw-bw*2,ch-bw*2, bw) ; } if( XtIsRealized(w) ) { XClearWindow(XtDisplay((Widget)tw), XtWindow((Widget)tw)) ; /* should not be necessary to explicitly repaint after a * resize, but XEmacs folks tell me it is. */ XtClass(tw)->core_class.expose((Widget)tw,NULL,None) ; } } } /* Resize */ /* Redraw entire Tabs widget */ /* ARGSUSED */ static void TabsExpose(Widget w, XEvent *event, Region region) { TabsWidget tw = (TabsWidget) w; if( tw->tabs.needs_layout ) XtClass(w)->core_class.resize(w) ; DrawTabs(tw, True) ; } /* Called when any Tabs widget resources are changed. */ /* ARGSUSED */ static Boolean TabsSetValues(Widget current, Widget request, Widget new, ArgList args, Cardinal *num_args) { TabsWidget curtw = (TabsWidget) current ; TabsWidget tw = (TabsWidget) new ; Boolean needRedraw = False ; Widget *childP ; int i ; if( tw->tabs.font != curtw->tabs.font || tw->tabs.internalWidth != curtw->tabs.internalWidth || tw->tabs.internalHeight != curtw->tabs.internalHeight ) { tw->tabs.tab_height = 2 * tw->tabs.internalHeight + SHADWID ; if( tw->tabs.font != NULL ) tw->tabs.tab_height += tw->tabs.font->max_bounds.ascent + tw->tabs.font->max_bounds.descent ; /* Tab size has changed. Resize all tabs and request a new size */ for(i=0, childP=tw->composite.children; i < (int) tw->composite.num_children; ++i, ++childP) if( XtIsManaged(*childP) ) TabWidth(*childP) ; PreferredSize(tw, &tw->core.width, &tw->core.height, NULL,NULL) ; needRedraw = True ; tw->tabs.needs_layout = True ; } /* TODO: if any color changes, need to recompute GCs and redraw */ if( tw->core.background_pixel != curtw->core.background_pixel || tw->core.background_pixmap != curtw->core.background_pixmap || tw->tabs.font != curtw->tabs.font ) if( XtIsRealized(new) ) { TabsFreeGCs(tw) ; TabsAllocGCs(tw) ; needRedraw = True ; } if( tw->core.sensitive != curtw->core.sensitive ) needRedraw = True ; /* If top widget changes, need to change stacking order, redraw tabs. * Window system will handle the redraws. */ if( tw->tabs.topWidget != curtw->tabs.topWidget ) { if( XtIsRealized(tw->tabs.topWidget) ) { Widget w = tw->tabs.topWidget ; TabsConstraints tab = (TabsConstraints) w->core.constraints ; XRaiseWindow(XtDisplay(w), XtWindow(w)) ; #ifdef NEED_MOTIF XtVaSetValues(curtw->tabs.topWidget, XmNtraversalOn, False, 0) ; XtVaSetValues(w, XmNtraversalOn, True, 0) ; #endif if( tab->tabs.row != (int) tw->tabs.numRows-1 ) TabsShuffleRows(tw) ; needRedraw = True ; } else tw->tabs.needs_layout = True ; } return needRedraw ; } /* Called when any child constraint resources change. */ /* ARGSUSED */ static Boolean TabsConstraintSetValues(Widget current, Widget request, Widget new, ArgList args, Cardinal *num_args) { TabsWidget tw = (TabsWidget) XtParent(new) ; TabsConstraints ctab = (TabsConstraints) current->core.constraints ; TabsConstraints tab = (TabsConstraints) new->core.constraints ; /* if label changes, need to re-layout the entire widget */ /* if foreground changes, need to redraw tab label */ /* TODO: only need resize of new bitmap has different dimensions * from old bitmap. */ if( tab->tabs.label != ctab->tabs.label || /* Tab size has changed. */ tab->tabs.left_bitmap != ctab->tabs.left_bitmap ) { TabWidth(new) ; tw->tabs.needs_layout = True ; if( tab->tabs.left_bitmap != ctab->tabs.left_bitmap ) getBitmapInfo(tw, tab) ; /* If there are no subclass ConstraintSetValues procedures remaining * to be invoked, and if the preferred size has changed, ask * for a resize. */ if( XtClass((Widget)tw) == tabsWidgetClass ) MakeSizeRequest(tw) ; } /* The child widget itself never needs a redisplay, but the parent * Tabs widget might. */ if( XtIsRealized(new) ) { if( tw->tabs.needs_layout ) { XClearWindow(XtDisplay((Widget)tw), XtWindow((Widget)tw)) ; XtClass(tw)->core_class.expose((Widget)tw,NULL,None) ; } else if( tab->tabs.foreground != ctab->tabs.foreground ) DrawTab(tw, new, True) ; } return False ; } static Boolean TabsAcceptFocus(Widget w, Time *t) { if( !w->core.being_destroyed && XtIsRealized(w) && XtIsSensitive(w) && XtIsManaged(w) && w->core.visible ) { Widget p ; for(p = XtParent(w); !XtIsShell(p); p = XtParent(p)) ; XtSetKeyboardFocus(p,w) ; return True ; } else return False ; } /* * Return preferred size. Happily accept anything >= our preferred size. * (TODO: is that the right thing to do? Should we always return "almost" * if offered more than we need?) */ static XtGeometryResult TabsQueryGeometry(Widget w, XtWidgetGeometry *intended, XtWidgetGeometry *preferred) { register TabsWidget tw = (TabsWidget)w ; XtGeometryMask mode = intended->request_mode ; preferred->request_mode = CWWidth | CWHeight ; PreferredSize(tw, &preferred->width, &preferred->height, NULL,NULL) ; if( (!(mode & CWWidth) || intended->width == w->core.width) && (!(mode & CWHeight) || intended->height == w->core.height) ) return XtGeometryNo ; if( (!(mode & CWWidth) || intended->width >= preferred->width) && (!(mode & CWHeight) || intended->height >= preferred->height) ) return XtGeometryYes; return XtGeometryAlmost; } /* * Geometry Manager; called when a child wants to be resized. */ static XtGeometryResult TabsGeometryManager(Widget w, XtWidgetGeometry *req, XtWidgetGeometry *reply) { TabsWidget tw = (TabsWidget) XtParent(w); Dimension s = SHADWID ; TabsConstraints tab = (TabsConstraints)w->core.constraints; XtGeometryResult result ; Dimension rw, rh ; /* Position request always denied */ if( ((req->request_mode & CWX) && req->x != w->core.x) || ((req->request_mode & CWY) && req->y != w->core.y) || !tab->tabs.resizable ) return XtGeometryNo ; /* Make all three fields in the request valid */ if( !(req->request_mode & CWWidth) ) req->width = w->core.width; if( !(req->request_mode & CWHeight) ) req->height = w->core.height; if( !(req->request_mode & CWBorderWidth) ) req->border_width = w->core.border_width; if( req->width == w->core.width && req->height == w->core.height && req->border_width == w->core.border_width ) return XtGeometryNo ; rw = req->width + 2 * req->border_width ; rh = req->height + 2 * req->border_width ; /* find out how big the children want to be now */ MaxChild(tw, w, rw, rh) ; /* Size changes must see if the new size can be accommodated. * The Tabs widget keeps all of its children the same * size. A request to shrink will be accepted only if the * new size is still big enough for all other children. A * request to shrink that is not big enough for all children * returns an "almost" response with the new proposed size * or a "no" response if unable to shrink at all. * * A request to grow will be accepted only if the Tabs parent can * grow to accommodate. * * TODO: * We could get fancy here and re-arrange the tabs if it is * necessary to compromise with the parent, but we'll save that * for another day. */ if (req->request_mode & (CWWidth | CWHeight | CWBorderWidth)) { Dimension cw,ch ; /* children's preferred size */ Dimension aw,ah ; /* available size we can give child */ Dimension th ; /* space used by tabs */ Dimension wid,hgt ; /* Tabs widget size */ cw = tw->tabs.max_cw ; ch = tw->tabs.max_ch ; /* find out what *my* resulting preferred size would be */ PreferredSize2(tw, cw, ch, &wid, &hgt) ; /* Would my size change? If so, ask to be resized. */ if( wid != tw->core.width || hgt != tw->core.height ) { Dimension oldWid = tw->core.width, oldHgt = tw->core.height ; XtWidgetGeometry myrequest, myreply ; myrequest.width = wid ; myrequest.height = hgt ; myrequest.request_mode = CWWidth | CWHeight ; assert (wid > 0 && hgt > 0); /* If child is only querying, or if we're going to have to * offer the child a compromise, then make this a query only. */ if( (req->request_mode & XtCWQueryOnly) || rw < cw || rh < ch ) myrequest.request_mode |= XtCWQueryOnly ; result = XtMakeGeometryRequest((Widget)tw, &myrequest, &myreply) ; /* !$@# Athena Box widget changes the core size even if QueryOnly * is set. I'm convinced this is a bug. At any rate, to work * around the bug, we need to restore the core size after every * query geometry request. This is only partly effective, * as there may be other boxes further up the tree. */ if( myrequest.request_mode & XtCWQueryOnly ) { tw->core.width = oldWid ; tw->core.height = oldHgt ; } /* based on the parent's response, determine what the * resulting Tabs widget size would be. */ switch( result ) { case XtGeometryYes: case XtGeometryDone: tw->tabs.needs_layout = True ; break ; case XtGeometryNo: wid = tw->core.width ; hgt = tw->core.height ; break ; case XtGeometryAlmost: wid = myreply.width ; hgt = myreply.height ; tw->tabs.needs_layout = True ; break ; } } /* Within the constraints imposed by the parent, what is * the max size we can give the child? */ (void) TabLayout(tw, wid, hgt, &th, True) ; aw = wid - 2*s ; ah = hgt - th - 2*s ; /* OK, make our decision. If requested size is >= max sibling * preferred size, AND requested size <= available size, then * we accept. Otherwise, we offer a compromise. */ if( rw == aw && rh == ah ) { /* Acceptable. If this wasn't a query, change *all* children * to this size. */ if( req->request_mode & XtCWQueryOnly ) return XtGeometryYes ; else { Widget *childP = tw->composite.children ; int i,bw ; w->core.border_width = req->border_width ; for(i=TabsNumChildren (tw); --i >= 0; ++childP) if( TabVisible(*childP) ) { bw = (*childP)->core.border_width ; XtConfigureWidget(*childP, s,tw->tabs.tab_total+s, rw-2*bw, rh-2*bw, bw) ; } #ifdef COMMENT /* TODO: under what conditions will we need to redraw? */ XClearWindow(XtDisplay((Widget)tw), XtWindow((Widget)tw)) ; XtClass(tw)->core_class.expose((Widget)tw,NULL,NULL) ; #endif /* COMMENT */ return XtGeometryDone ; } } /* Cannot grant child's request. Describe what we *can* do * and return counter-offer. */ reply->width = aw - 2 * req->border_width ; reply->height = ah - 2 * req->border_width ; reply->border_width = req->border_width ; reply->request_mode = CWWidth | CWHeight | CWBorderWidth ; return XtGeometryAlmost ; } return XtGeometryYes ; } /* The number of children we manage has changed; recompute * size from scratch. */ static void TabsChangeManaged(Widget w) { TabsWidget tw = (TabsWidget)w ; Widget *childP = tw->composite.children ; int i ; if( tw->tabs.topWidget != NULL && ( !XtIsManaged(tw->tabs.topWidget) || tw->tabs.topWidget->core.being_destroyed ) ) tw->tabs.topWidget = NULL ; /* Check whether the highlight tab is still valid. */ if( tw->tabs.hilight != NULL && ( !XtIsManaged(tw->tabs.hilight) || tw->tabs.hilight->core.being_destroyed ) ) tw->tabs.hilight = NULL ; GetPreferredSizes(tw) ; MakeSizeRequest(tw) ; XtClass(w)->core_class.resize(w) ; if( XtIsRealized(w) ) { Display *dpy = XtDisplay(w) ; XClearWindow(dpy, XtWindow(w)) ; XtClass(w)->core_class.expose(w,NULL,NULL) ; /* make sure the top widget stays on top. This requires * making sure that all new children are realized first. */ if( tw->tabs.topWidget != NULL && XtIsRealized(tw->tabs.topWidget) ) { for(i=TabsNumChildren (tw); --i >= 0; ++childP) if( !XtIsRealized(*childP) ) XtRealizeWidget(*childP) ; XRaiseWindow(dpy, XtWindow(tw->tabs.topWidget)) ; } } #ifdef NEED_MOTIF /* Only top widget may receive input */ for(childP = tw->composite.children, i=tw->composite.num_children; --i >= 0; ++childP) { XtVaSetValues(*childP, XmNtraversalOn, False, 0) ; } if( tw->tabs.topWidget != NULL ) XtVaSetValues(tw->tabs.topWidget, XmNtraversalOn, True, 0) ; #endif } /**************************************************************** * * Action Procedures * ****************************************************************/ /* User clicks on a tab, figure out which one it was. */ /* ARGSUSED */ static void TabsSelect(Widget w, XEvent *event, String *params, Cardinal *num_params) { TabsWidget tw = (TabsWidget) w ; Widget *childP ; Position x,y ; Dimension h = tw->tabs.tab_height ; int i ; #ifdef NEED_MOTIF XmProcessTraversal (w, XmTRAVERSE_CURRENT) ; #endif /* TODO: is there an Xmu function or something to do this instead? */ switch( event->type ) { case ButtonPress: case ButtonRelease: x = event->xbutton.x ; y = event->xbutton.y ; break ; case KeyPress: case KeyRelease: x = event->xkey.x ; y = event->xkey.y ; break ; default: return ; } /* TODO: determine which tab was clicked, if any. Set that * widget to be top of stacking order with XawTabsSetTop(). */ for(i=0, childP=tw->composite.children; i < (int) TabsNumChildren (tw); ++i, ++childP) if( TabVisible(*childP) ) { TabsConstraints tab = (TabsConstraints)(*childP)->core.constraints; if( x > tab->tabs.x && x < tab->tabs.x + tab->tabs.width && y > tab->tabs.y && y < tab->tabs.y + h ) { if( *childP != tw->tabs.topWidget && (XtIsSensitive(*childP) || tw->tabs.selectInsensitive) ) XawTabsSetTop(*childP, True) ; break ; } } } /* User hits a key */ static void TabsPage(Widget w, XEvent *event, String *params, Cardinal *num_params) { TabsWidget tw = (TabsWidget) w ; Widget newtop = NULL; Widget *childP ; int idx ; int nc = TabsNumChildren (tw) ; if( nc <= 0 ) return ; if( *num_params < 1 ) { XtAppWarning(XtWidgetToApplicationContext(w), "Tabs: page() action called with no arguments") ; return ; } if( tw->tabs.topWidget == NULL ) tw->tabs.topWidget = tw->composite.children[0] ; for(idx=0, childP=tw->composite.children; idx < nc; ++idx, ++childP ) if( tw->tabs.topWidget == *childP ) break ; switch( params[0][0] ) { case 'u': /* up */ case 'U': if( --idx < 0 ) idx = nc-1 ; newtop = tw->composite.children[idx] ; break ; case 'd': /* down */ case 'D': if( ++idx >= nc ) idx = 0 ; newtop = tw->composite.children[idx] ; break ; case 'h': case 'H': default: newtop = tw->composite.children[0] ; break ; case 'e': case 'E': newtop = tw->composite.children[nc-1] ; break ; case 's': /* selected */ case 'S': if( (newtop = tw->tabs.hilight) == NULL ) return ; break ; } XawTabsSetTop(newtop, True) ; } /* User hits up/down key */ static void TabsHighlight(Widget w, XEvent *event, String *params, Cardinal *num_params) { TabsWidget tw = (TabsWidget) w ; Widget newhl = NULL; Widget *childP ; int idx ; int nc = TabsNumChildren (tw) ; if( nc <= 0 ) return ; if( *num_params < 1 ) { if( tw->tabs.hilight != NULL ) DrawHighlight(tw, tw->tabs.hilight, False) ; return ; } if( tw->tabs.hilight == NULL ) newhl = tw->composite.children[0] ; else { /* find index of currently highlit child */ for(idx=0, childP=tw->composite.children; idx < nc; ++idx, ++childP ) if( tw->tabs.hilight == *childP ) break ; switch( params[0][0] ) { case 'u': /* up */ case 'U': if( --idx < 0 ) idx = nc-1 ; newhl = tw->composite.children[idx] ; break ; case 'd': /* down */ case 'D': if( ++idx >= nc ) idx = 0 ; newhl = tw->composite.children[idx] ; break ; case 'h': case 'H': newhl = tw->composite.children[0] ; break ; case 'e': case 'E': newhl = tw->composite.children[nc-1] ; break ; default: newhl = tw->tabs.hilight ; break ; } } XawTabsSetHighlight(w, newhl) ; } static void TabsUnhighlight(Widget w, XEvent *event, String *params, Cardinal *num_params) { TabsWidget tw = (TabsWidget) w ; int nc = tw->composite.num_children ; if( nc <= 0 ) return ; if( tw->tabs.hilight != NULL ) DrawHighlight(tw, tw->tabs.hilight, True) ; } /**************************************************************** * * Public Procedures * ****************************************************************/ /* Set the top tab, optionally call all callbacks. */ void XawTabsSetTop(Widget w, Bool callCallbacks) { TabsWidget tw = (TabsWidget)w->core.parent ; TabsConstraints tab ; Widget oldtop = tw->tabs.topWidget ; if( !XtIsSubclass(w->core.parent, tabsWidgetClass) ) { char line[256] ; sprintf(line, "XawTabsSetTop: widget \"%.64s\" is not the child of a tabs widget.", XtName(w)) ; XtAppWarning(XtWidgetToApplicationContext(w), line) ; return ; } if( callCallbacks ) XtCallCallbackList(w, tw->tabs.popdownCallbacks, (XtPointer)tw->tabs.topWidget) ; if( !XtIsRealized(w) ) { tw->tabs.topWidget = w ; tw->tabs.needs_layout = True ; tw->tabs.hilight = NULL; /* The highlight tab might disappear. */ return ; } XRaiseWindow(XtDisplay(w), XtWindow(w)) ; #ifdef NEED_MOTIF XtVaSetValues(oldtop, XmNtraversalOn, False, 0) ; XtVaSetValues(w, XmNtraversalOn, True, 0) ; #endif tab = (TabsConstraints) w->core.constraints ; /* Unhighlight before we start messing with the stacking order. */ if( tw->tabs.hilight != NULL ) { DrawHighlight(tw, tw->tabs.hilight, True) ; tw->tabs.hilight = NULL; } if( tab->tabs.row == 0 ) { /* Easy case; undraw current top, undraw new top, assign new * top, redraw all borders. * We *could* just erase and execute a full redraw, but I like to * reduce screen flicker. */ UndrawTab(tw, oldtop) ; /* undraw old */ DrawBorder(tw, oldtop, True) ; UndrawTab(tw, w) ; /* undraw new */ DrawBorder(tw, w, True) ; tw->tabs.topWidget = w ; DrawTab(tw, oldtop, True) ; /* redraw old */ DrawTab(tw, w, True) ; /* redraw new */ DrawTabs(tw, False) ; } else { tw->tabs.topWidget = w ; TabsShuffleRows(tw) ; XClearWindow(XtDisplay((Widget)tw), XtWindow((Widget)tw)) ; XtClass(tw)->core_class.expose((Widget)tw,NULL,None) ; } XawTabsSetHighlight((Widget)tw, w) ; if( callCallbacks ) XtCallCallbackList(w, tw->tabs.callbacks, (XtPointer)w) ; } /* Set the top tab, optionally call all callbacks. */ void XawTabsSetHighlight(Widget t, Widget w) { TabsWidget tw = (TabsWidget)t ; if( !XtIsSubclass(t, tabsWidgetClass) ) return ; if( XtIsRealized(t) && w != tw->tabs.hilight ) { if( w != NULL ) DrawHighlight(tw, w, False) ; } tw->tabs.hilight = w ; } /**************************************************************** * * Private Procedures * ****************************************************************/ static void TabsAllocGCs(TabsWidget tw) { TabsAllocFgGC(tw) ; TabsAllocGreyGC(tw) ; tw->tabs.backgroundGC = AllocBackgroundGC((Widget)tw, None) ; tw->tabs.topGC = AllocTopShadowGC((Widget)tw, tw->tabs.top_shadow_contrast, tw->tabs.be_nice_to_cmap) ; tw->tabs.botGC = AllocBotShadowGC((Widget)tw, tw->tabs.bot_shadow_contrast, tw->tabs.be_nice_to_cmap) ; } static void TabsFreeGCs(TabsWidget tw) { Widget w = (Widget) tw; XtReleaseGC(w, tw->tabs.foregroundGC) ; XtReleaseGC(w, tw->tabs.greyGC) ; XtReleaseGC(w, tw->tabs.backgroundGC) ; XtReleaseGC(w, tw->tabs.topGC) ; XtReleaseGC(w, tw->tabs.botGC) ; #ifdef HAVE_XMU XmuReleaseStippledPixmap(XtScreen(w), tw->tabs.grey50) ; #endif } /* Redraw entire Tabs widget */ static void DrawTabs(TabsWidget tw, Bool labels) { Widget *childP ; int i,j ; Dimension s = SHADWID ; Dimension th = tw->tabs.tab_height ; Position y ; TabsConstraints tab ; if( !XtIsRealized((Widget)tw)) return ; /* draw tabs and frames by row except for the top tab, which * is drawn last. (This is inefficiently written, but should not * be too slow as long as there are not a lot of rows.) */ y = tw->tabs.numRows == 1 ? TABDELTA : 0 ; for(i=0; i < (int) tw->tabs.numRows; ++i, y += th) { for( j=TabsNumChildren (tw), childP=tw->composite.children; --j >= 0; ++childP ) if( TabVisible(*childP) ) { tab = (TabsConstraints)(*childP)->core.constraints; if( tab->tabs.row == i && *childP != tw->tabs.topWidget ) DrawTab(tw, *childP, labels) ; } if( i != (int) tw->tabs.numRows -1 ) DrawTrim(tw, 0,y+th, tw->core.width, th+s, False,False) ; } DrawFrame(tw) ; /* and now the top tab */ if( tw->tabs.topWidget != NULL ) DrawTab(tw, tw->tabs.topWidget, labels) ; } /* Draw one tab. Corners are rounded very slightly. */ static void DrawTab(TabsWidget tw, Widget child, Bool labels) { GC gc ; int x,y ; if( !XtIsRealized((Widget)tw)) return ; DrawBorder(tw, child, False) ; if( labels ) { TabsConstraints tab = (TabsConstraints)child->core.constraints; Display *dpy = XtDisplay((Widget)tw) ; Window win = XtWindow((Widget)tw) ; String lbl = tab->tabs.label != NULL ? tab->tabs.label : XtName(child) ; if( XtIsSensitive(child) ) { gc = tw->tabs.foregroundGC ; XSetForeground(dpy, gc, tab->tabs.foreground) ; } else { /* grey pixel allocation deferred until now */ if( !tab->tabs.greyAlloc ) { if( tw->tabs.be_nice_to_cmap || tw->core.depth == 1 ) tab->tabs.grey = tab->tabs.foreground ; else tab->tabs.grey = AllocGreyPixel((Widget)tw, tab->tabs.foreground, tw->core.background_pixel, tw->tabs.insensitive_contrast ) ; tab->tabs.greyAlloc = True ; } gc = tw->tabs.greyGC ; XSetForeground(dpy, gc, tab->tabs.grey) ; } x = tab->tabs.x ; y = tab->tabs.y ; if( child == tw->tabs.topWidget ) y -= TABLDELTA ; if( tab->tabs.left_bitmap != None && tab->tabs.lbm_width > 0 ) { if( tab->tabs.lbm_depth == 1 ) XCopyPlane(dpy, tab->tabs.left_bitmap, win,gc, 0,0, tab->tabs.lbm_width, tab->tabs.lbm_height, x+tab->tabs.lbm_x, y+tab->tabs.lbm_y, 1L) ; else XCopyArea(dpy, tab->tabs.left_bitmap, win,gc, 0,0, tab->tabs.lbm_width, tab->tabs.lbm_height, x+tab->tabs.lbm_x, y+tab->tabs.lbm_y) ; } if( lbl != NULL && tw->tabs.font != NULL ) XDrawString(dpy,win,gc, x+tab->tabs.l_x, y+tab->tabs.l_y, lbl, (int)strlen(lbl)) ; } if( child == tw->tabs.hilight ) DrawHighlight(tw, child, False) ; } /* draw frame all the way around the child windows. */ static void DrawFrame(TabsWidget tw) { GC topgc = tw->tabs.topGC ; GC botgc = tw->tabs.botGC ; Dimension s = SHADWID ; Dimension ch = tw->tabs.child_height ; if (ch > 0) Draw3dBox((Widget)tw, 0,tw->tabs.tab_total, tw->core.width, ch+2*s, s, topgc, botgc) ; else { Widget w = tw->tabs.topWidget ; if (w != NULL) { TabsConstraints tab = (TabsConstraints) w->core.constraints ; Draw3dBox((Widget)tw, 0,tw->core.height - 2*s, tab->tabs.x, 2*s, s, topgc, botgc); Draw3dBox((Widget)tw, tab->tabs.x + tab->tabs.width, tw->core.height - 2*s, tw->core.width - tab->tabs.x - tab->tabs.width, 2*s, s, topgc, botgc); } else Draw3dBox((Widget)tw, 0,tw->core.height - 2*s, tw->core.width, 2*s, s, topgc, botgc) ; } } /* draw trim around a tab or underneath a row of tabs */ static void DrawTrim(TabsWidget tw, /* widget */ int x, /* upper-left corner */ int y, int wid, /* total size */ int hgt, Bool bottom, /* draw bottom? */ Bool undraw) /* undraw all */ { Display *dpy = XtDisplay((Widget)tw) ; Window win = XtWindow((Widget)tw) ; GC bggc = tw->tabs.backgroundGC ; GC topgc = undraw ? bggc : tw->tabs.topGC ; GC botgc = undraw ? bggc : tw->tabs.botGC ; if( bottom ) XDrawLine(dpy,win,bggc, x,y+hgt-1, x+wid-1,y+hgt-1) ; /* bottom */ XDrawLine(dpy,win,topgc, x,y+2, x,y+hgt-2) ; /* left */ XDrawPoint(dpy,win,topgc, x+1,y+1) ; /* corner */ XDrawLine(dpy,win,topgc, x+2,y, x+wid-3,y) ; /* top */ XDrawLine(dpy,win,botgc, x+wid-2,y+1, x+wid-2,y+hgt-2) ; /* right */ XDrawLine(dpy,win,botgc, x+wid-1,y+2, x+wid-1,y+hgt-2) ; /* right */ } /* Draw one tab border. */ static void DrawBorder(TabsWidget tw, Widget child, Bool undraw) { TabsConstraints tab = (TabsConstraints)child->core.constraints; Position x = tab->tabs.x ; Position y = tab->tabs.y ; Dimension twid = tab->tabs.width ; Dimension thgt = tw->tabs.tab_height ; /* top tab requires a little special attention; it overlaps * neighboring tabs slightly, so the background must be cleared * in the region of the overlap to partially erase those neighbors. * TODO: is this worth doing with regions instead? */ if( child == tw->tabs.topWidget ) { Display *dpy = XtDisplay((Widget)tw) ; Window win = XtWindow((Widget)tw) ; GC bggc = tw->tabs.backgroundGC ; XRectangle rects[3] ; x -= TABDELTA ; y -= TABDELTA ; twid += TABDELTA*2 ; thgt += TABDELTA ; AddRect(0, x,y+1,twid,TABDELTA) ; AddRect(1, x+1,y,TABDELTA,thgt) ; AddRect(2, x+twid-TABDELTA-1,y,TABDELTA,thgt) ; XFillRectangles(dpy,win,bggc, rects, 3) ; } DrawTrim(tw, x,y,twid,thgt+1, child == tw->tabs.topWidget, undraw) ; } /* Draw highlight around tab that has focus */ static void DrawHighlight(TabsWidget tw, Widget child, Bool undraw) { TabsConstraints tab = (TabsConstraints)child->core.constraints; Display *dpy = XtDisplay((Widget)tw) ; Window win = XtWindow((Widget)tw) ; GC gc ; Position x = tab->tabs.x ; Position y = tab->tabs.y ; Dimension wid = tab->tabs.width ; Dimension hgt = tw->tabs.tab_height ; XPoint points[6] ; /* top tab does not have a highlight */ if( child == tw->tabs.topWidget ) return ; if( undraw ) gc = tw->tabs.backgroundGC ; else if( XtIsSensitive(child) ) { gc = tw->tabs.foregroundGC ; XSetForeground(dpy, gc, tab->tabs.foreground) ; } else { gc = tw->tabs.greyGC ; XSetForeground(dpy, gc, tab->tabs.grey) ; } points[0].x = x+1 ; points[0].y = y+hgt-1 ; points[1].x = x+1 ; points[1].y = y+2 ; points[2].x = x+2 ; points[2].y = y+1 ; points[3].x = x+wid-4 ; points[3].y = y+1 ; points[4].x = x+wid-3 ; points[4].y = y+2 ; points[5].x = x+wid-3 ; points[5].y = y+hgt-1 ; XDrawLines(dpy,win,gc, points,6, CoordModeOrigin) ; } /* Undraw one tab interior */ static void UndrawTab(TabsWidget tw, Widget child) { TabsConstraints tab = (TabsConstraints)child->core.constraints; Position x = tab->tabs.x ; Position y = tab->tabs.y ; Dimension twid = tab->tabs.width ; Dimension thgt = tw->tabs.tab_height ; Display *dpy = XtDisplay((Widget)tw) ; Window win = XtWindow((Widget)tw) ; GC bggc = tw->tabs.backgroundGC ; XFillRectangle(dpy,win,bggc, x,y, twid,thgt) ; } /* GEOMETRY UTILITIES */ /* Overview: * * MaxChild(): ask all children (except possibly one) their * preferred sizes, set max_cw, max_ch accordingly. * * GetPreferredSizes(): ask all children their preferred sizes, * set max_cw, max_ch accordingly. * * PreferredSize(): given max_cw, max_ch, return tabs widget * preferred size. Iterate with other widths in order to get * a reasonable aspect ratio. * * PreferredSize2(): Given child dimensions, return Tabs * widget dimensions. * * PreferredSize3(): Same, except given child dimensions plus * shadow. */ /* Compute the width of one child's tab. Positions will be computed * elsewhere. * * height: font height + vertical_space*2 + shadowWid*2 * width: string width + horizontal_space*2 + shadowWid*2 * * All tabs are the same height, so that is computed elsewhere. */ static void TabWidth(Widget w) { TabsConstraints tab = (TabsConstraints) w->core.constraints ; TabsWidget tw = (TabsWidget)XtParent(w) ; String lbl = tab->tabs.label != NULL ? tab->tabs.label : XtName(w) ; XFontStruct *font = tw->tabs.font ; int iw = tw->tabs.internalWidth ; tab->tabs.width = iw + SHADWID*2 ; tab->tabs.l_x = tab->tabs.lbm_x = SHADWID + iw ; if( tab->tabs.left_bitmap != None ) { tab->tabs.width += tab->tabs.lbm_width + iw ; tab->tabs.l_x += tab->tabs.lbm_width + iw ; tab->tabs.lbm_y = (tw->tabs.tab_height - tab->tabs.lbm_height)/2 ; } if( lbl != NULL && font != NULL ) { tab->tabs.width += XTextWidth( font, lbl, (int)strlen(lbl) ) + iw ; tab->tabs.l_y = (tw->tabs.tab_height + tw->tabs.font->max_bounds.ascent - tw->tabs.font->max_bounds.descent)/2 ; } } /* Lay out tabs to fit in given width. Compute x,y position and * row number for each tab. Return number of rows and total height * required by all tabs. If there is only one row, add TABDELTA * height to the total. Rows are assigned bottom to top. * * Tabs are indented from the edges by INDENT. * * TODO: if they require more than two rows and the total height:width * ratio is more than 2:1, then try something else. */ static int TabLayout(TabsWidget tw, Dimension wid, Dimension hgt, Dimension *reply_height, Bool query_only) { int i, row, done = 0, display_rows = 0 ; int num_children = tw->composite.num_children ; Widget *childP ; Dimension w ; Position x,y ; TabsConstraints tab ; /* Algorithm: loop through children, assign X positions. If a tab * would extend beyond the right edge, start a new row. After all * rows are assigned, make a second pass and assign Y positions. */ if( num_children > 0 ) { /* Loop through the tabs and see how much space they need. */ row = 0 ; x = INDENT ; y = 0 ; wid -= INDENT ; for(i=num_children, childP=tw->composite.children; --i >= 0; ++childP) if( XtIsManaged(*childP) ) { tab = (TabsConstraints) (*childP)->core.constraints ; w = tab->tabs.width ; if( x + w > wid ) { /* new row */ if (y + tw->tabs.tab_height > hgt && !done) { display_rows = row; done = 1; } ++row; x = INDENT ; y += tw->tabs.tab_height ; } if( !query_only ) { tab->tabs.x = x ; tab->tabs.y = y ; tab->tabs.row = row ; } x += w + SPACING ; if (!query_only && !done) tab->tabs.visible = 1; } /* If there was only one row, increase the height by TABDELTA */ if( ++display_rows == 1 ) { row++; y = TABDELTA ; if( !query_only ) for(i=num_children, childP=tw->composite.children; --i >= 0 ; ++childP) if( XtIsManaged(*childP) ) { tab = (TabsConstraints) (*childP)->core.constraints ; tab->tabs.y = y ; } } y += tw->tabs.tab_height ; } else display_rows = row = y = 0 ; if( !query_only ) { tw->tabs.tab_total = y ; tw->tabs.numRows = display_rows ; tw->tabs.realRows = row; } if( reply_height != NULL ) *reply_height = y ; return display_rows ; } /* Find max preferred child size. Returned sizes include child * border widths. */ static void GetPreferredSizes(TabsWidget tw) { MaxChild(tw, NULL, 0,0) ; } /* Find max preferred child size. Returned sizes include child * border widths. If except is non-null, don't ask that one. */ static void MaxChild(TabsWidget tw, Widget except, Dimension cw, Dimension ch) { int i ; Widget *childP = tw->composite.children ; XtWidgetGeometry preferred ; for(i=tw->composite.num_children; --i >=0; ++childP) if( TabVisible (*childP) /*XtIsManaged(*childP)*/ && *childP != except ) { (void) XtQueryGeometry(*childP, NULL, &preferred) ; cw = Max(cw, preferred.width + preferred.border_width * 2 ) ; ch = Max(ch, preferred.height + preferred.border_width * 2 ) ; } tw->tabs.max_cw = cw ; tw->tabs.max_ch = ch ; } /* rotate row numbers to bring current widget to bottom row, * compute y positions for all tabs */ static void TabsShuffleRows(TabsWidget tw) { TabsConstraints tab ; int move ; int real_rows, display_rows ; Widget *childP ; Dimension th = tw->tabs.tab_height ; Position bottom ; int i ; /* There must be a top widget. If not, assign one. */ if( tw->tabs.topWidget == NULL && tw->composite.children != NULL ) for(i=TabsNumChildren (tw), childP=tw->composite.children; --i >= 0; ++childP) if( XtIsManaged(*childP) ) { tw->tabs.topWidget = *childP ; break ; } if( tw->tabs.topWidget != NULL ) { display_rows = tw->tabs.numRows ; real_rows = tw->tabs.realRows ; assert( display_rows <= real_rows ) ; if( real_rows > 1 ) { tab = (TabsConstraints) tw->tabs.topWidget->core.constraints ; assert( tab != NULL ) ; /* How far to move top row. The selected tab must be on the bottom row of the *visible* rows. */ move = (real_rows + 1 - display_rows) - tab->tabs.row ; if (move < 0) move = real_rows - move; bottom = tw->tabs.tab_total - th ; for(i=tw->composite.num_children, childP=tw->composite.children; --i >= 0; ++childP) if( XtIsManaged(*childP) ) { tab = (TabsConstraints) (*childP)->core.constraints ; tab->tabs.row = (tab->tabs.row + move) % real_rows ; tab->tabs.y = bottom - tab->tabs.row * th ; tab->tabs.visible = (tab->tabs.row < display_rows); } } } } /* Find preferred size. Ask children, find size of largest, * add room for tabs & return. This can get a little involved, * as we don't want to have too many rows of tabs; we may widen * the widget to reduce # of rows. * * This function requires that max_cw, max_ch already be set. */ static int PreferredSize( TabsWidget tw, Dimension *reply_width, /* total widget size */ Dimension *reply_height, Dimension *reply_cw, /* child widget size */ Dimension *reply_ch) { Dimension cw,ch ; /* child width, height */ Dimension wid,hgt ; Dimension rwid,rhgt ; int nrow ; wid = cw = tw->tabs.max_cw ; hgt = ch = tw->tabs.max_ch ; nrow = PreferredSize2(tw, wid,hgt, &rwid, &rhgt) ; /* Check for absurd results (more than 2 rows, high aspect * ratio). Try wider size if needed. * TODO: make sure this terminates. */ if( nrow > 2 && rhgt > rwid ) { Dimension w0, w1 ; int maxloop = 20 ; /* step 1: start doubling size until it's too big */ do { w0 = wid ; wid = Max(wid*2, wid+20) ; nrow = PreferredSize2(tw, wid,hgt, &rwid,&rhgt) ; } while( nrow > 2 && rhgt > rwid ) ; w1 = wid ; /* step 2: use Newton's method to find ideal size. Stop within * 8 pixels. */ while( --maxloop > 0 && w1 > w0 + 8 ) { wid = (w0+w1)/2 ; nrow = PreferredSize2(tw, wid,hgt, &rwid,&rhgt) ; if( nrow > 2 && rhgt > rwid ) w0 = wid ; else w1 = wid ; } wid = w1 ; } *reply_width = rwid ; *reply_height = rhgt ; if( reply_cw != NULL ) *reply_cw = cw ; if( reply_ch != NULL ) *reply_ch = ch ; return nrow ; } /* Find preferred size, given size of children. */ static int PreferredSize2( TabsWidget tw, Dimension cw, /* child width, height */ Dimension ch, Dimension *reply_width, /* total widget size */ Dimension *reply_height) { Dimension s = SHADWID ; int ret; /* make room for shadow frame */ cw += s*2 ; ch += s*2 ; ret = PreferredSize3(tw, cw, ch, reply_width, reply_height) ; assert (*reply_width > 0 && *reply_height > 0); return ret; } /* Find preferred size, given size of children+shadow. */ static int PreferredSize3( TabsWidget tw, Dimension wid, /* child width, height */ Dimension hgt, Dimension *reply_width, /* total widget size */ Dimension *reply_height) { Dimension th ; /* space used by tabs */ int nrows ; if( tw->composite.num_children > 0 ) nrows = TabLayout(tw, wid, hgt, &th, True) ; else { th = 0 ; nrows = 0 ; } *reply_width = Max(wid, MIN_WID) ; *reply_height = Max(th+hgt, MIN_HGT) ; return nrows ; } static void MakeSizeRequest(TabsWidget tw) { Widget w = (Widget)tw ; XtWidgetGeometry request, reply ; XtGeometryResult result ; Dimension cw,ch ; request.request_mode = CWWidth | CWHeight ; PreferredSize(tw, &request.width, &request.height, &cw, &ch) ; if( request.width == tw->core.width && request.height == tw->core.height ) return ; result = XtMakeGeometryRequest(w, &request, &reply) ; if( result == XtGeometryAlmost ) { /* Bugger. Didn't get what we want, but were offered a * compromise. If the width was too small, recompute * based on the too-small width and try again. * If the height was too small, make a wild-ass guess * at a wider width and try again. */ if( reply.width < request.width && reply.height >= request.height ) { Dimension s = SHADWID ; ch += s*2 ; PreferredSize3(tw, reply.width,ch, &request.width, &request.height); result = XtMakeGeometryRequest(w, &request, &reply) ; if( result == XtGeometryAlmost ) (void) XtMakeGeometryRequest(w, &reply, NULL) ; } else (void) XtMakeGeometryRequest(w, &reply, NULL) ; } } static void getBitmapInfo(TabsWidget tw, TabsConstraints tab) { Window root ; int x,y ; unsigned int bw ; if( tab->tabs.left_bitmap == None || !XGetGeometry(XtDisplay(tw), tab->tabs.left_bitmap, &root, &x, &y, &tab->tabs.lbm_width, &tab->tabs.lbm_height, &bw, &tab->tabs.lbm_depth) ) tab->tabs.lbm_width = tab->tabs.lbm_height = 0 ; } /* Code copied & modified from Gcs.c. This version has dynamic * foreground. */ static void TabsAllocFgGC(TabsWidget tw) { Widget w = (Widget) tw; XGCValues values ; values.background = tw->core.background_pixel ; values.font = tw->tabs.font->fid ; values.line_style = LineOnOffDash ; values.line_style = LineSolid ; tw->tabs.foregroundGC = XtAllocateGC(w, w->core.depth, GCBackground|GCFont|GCLineStyle, &values, GCForeground, GCSubwindowMode|GCGraphicsExposures|GCDashOffset| GCDashList|GCArcMode) ; } static void TabsAllocGreyGC(TabsWidget tw) { Widget w = (Widget) tw; XGCValues values ; values.background = tw->core.background_pixel ; values.font = tw->tabs.font->fid ; #ifdef HAVE_XMU if( tw->tabs.be_nice_to_cmap || w->core.depth == 1) { values.fill_style = FillStippled ; tw->tabs.grey50 = values.stipple = XmuCreateStippledPixmap(XtScreen(w), 1L, 0L, 1) ; tw->tabs.greyGC = XtAllocateGC(w, w->core.depth, GCBackground|GCFont|GCStipple|GCFillStyle, &values, GCForeground, GCSubwindowMode|GCGraphicsExposures|GCDashOffset| GCDashList|GCArcMode) ; } else #endif { tw->tabs.greyGC = XtAllocateGC(w, w->core.depth, GCFont, &values, GCForeground, GCBackground|GCSubwindowMode|GCGraphicsExposures|GCDashOffset| GCDashList|GCArcMode) ; } }