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-rw-r--r--ChangeLog13
-rw-r--r--doc/font.n11
-rw-r--r--generic/tkFont.c77
-rw-r--r--generic/tkFont.h6
-rw-r--r--generic/tkInt.h6
-rw-r--r--macosx/tkMacOSXFont.c34
-rw-r--r--tests/font.test38
-rw-r--r--unix/tkUnixFont.c40
-rw-r--r--unix/tkUnixRFont.c62
-rw-r--r--win/tkWinFont.c58
10 files changed, 320 insertions, 25 deletions
diff --git a/ChangeLog b/ChangeLog
index 16f7c1d..6cd7250 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+2006-12-01 Kevin Kenny <kennykb@acm.org>
+
+ TIP #300 IMPLEMENTATION
+
+ * doc/font.n: Added a [font actual $font $char]
+ * generic/tkFont.c: variant that introspects the font
+ * generic/tkFont.h: that is chosen to render a given
+ * macosx/tkMacOSXFont.c: character in a given nominal font.
+ * tests/font.test: Added documentation and test cases
+ * unix/tkUnixFont.c: for the new command syntax.
+ * unix/tkUnixRFont.c:
+ * win/tkWinFont.c:
+
2006-12-01 Jeff Hobbs <jeffh@ActiveState.com>
* doc/wm.n, tests/winWm.test:
diff --git a/doc/font.n b/doc/font.n
index 8e844d0..32d8ef1 100644
--- a/doc/font.n
+++ b/doc/font.n
@@ -4,7 +4,7 @@
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
-'\" RCS: @(#) $Id: font.n,v 1.8 2005/04/06 21:11:54 dkf Exp $
+'\" RCS: @(#) $Id: font.n,v 1.9 2006/12/01 20:14:23 kennykb Exp $
'\"
.so man.macros
.TH font n 8.0 Tk "Tk Built-In Commands"
@@ -22,7 +22,7 @@ fonts, such as defining named fonts and inspecting the actual attributes of
a font. The command has several different forms, determined by the
first argument. The following forms are currently supported:
.TP
-\fBfont actual \fIfont\fR ?\fB\-displayof \fIwindow\fR? ?\fIoption\fR?
+\fBfont actual \fIfont\fR ?\fB\-displayof \fIwindow\fR? ?\fIoption\fR? ?\fB--\fR? ?\fIchar\fR?
.
Returns information about the actual attributes that are obtained when
\fIfont\fR is used on \fIwindow\fR's display; the actual attributes obtained
@@ -32,7 +32,12 @@ limitations, such as the availability of font families and pointsizes.
\fIwindow\fR argument is omitted, it defaults to the main window. If
\fIoption\fR is specified, returns the value of that attribute; if it is
omitted, the return value is a list of all the attributes and their values.
-See FONT OPTIONS below for a list of the possible attributes.
+See FONT OPTIONS below for a list of the possible attributes. If the
+\fIchar\fR argument is supplied, it must be a single character. The font
+attributes returned will be those of the specific font used to render
+that character, which will be different from the base font if the base
+font does not contain the given character. If \fIchar\fR may be a hyphen, it
+should be preceded by \fB--\fR to distinguish it from a misspelt \fIoption\fR.
.TP
\fBfont configure \fIfontname\fR ?\fIoption\fR? ?\fIvalue option value ...\fR?
.
diff --git a/generic/tkFont.c b/generic/tkFont.c
index 3d64409..15ec180 100644
--- a/generic/tkFont.c
+++ b/generic/tkFont.c
@@ -10,7 +10,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkFont.c,v 1.28 2006/03/22 00:21:16 das Exp $
+ * RCS: @(#) $Id: tkFont.c,v 1.29 2006/12/01 20:14:23 kennykb Exp $
*/
#include "tkPort.h"
@@ -503,31 +503,88 @@ Tk_FontObjCmd(
switch ((enum options) index) {
case FONT_ACTUAL: {
int skip, result;
+ int n;
+ const char* s;
Tk_Font tkfont;
- Tcl_Obj *objPtr;
+ Tcl_Obj *optPtr;
+ Tcl_Obj *charPtr;
+ Tcl_Obj *resultPtr;
+ Tcl_UniChar uniChar;
CONST TkFontAttributes *faPtr;
+ TkFontAttributes fa;
+ /*
+ * Params 0 and 1 are 'font actual'. Param 2 is the
+ * font name. 3-4 may be '-displayof $window'
+ */
skip = TkGetDisplayOf(interp, objc - 3, objv + 3, &tkwin);
if (skip < 0) {
return TCL_ERROR;
}
- if ((objc < 3) || (objc - skip > 4)) {
+
+ /* Next parameter may be an option */
+ n = skip + 3;
+ optPtr = NULL;
+ charPtr = NULL;
+ if (n < objc) {
+ s = Tcl_GetString(objv[n]);
+ if (s[0] == '-' && s[1] != '-') {
+ optPtr = objv[n];
+ ++n;
+ } else {
+ optPtr = NULL;
+ }
+ }
+
+ /* Next parameter may be '--' to mark end of options */
+ if (n < objc) {
+ if (!strcmp(Tcl_GetString(objv[n]), "--")) {
+ ++n;
+ }
+ }
+
+ /* Next parameter is the character to get font information for */
+ if (n < objc) {
+ charPtr = objv[n];
+ ++n;
+ }
+
+ /* If there were fewer than 3 args, or args remain, that's an error */
+ if (objc < 3 || n < objc) {
Tcl_WrongNumArgs(interp, 2, objv,
- "font ?-displayof window? ?option?");
+ "font ?-displayof window? ?option? ?--? ?char?");
return TCL_ERROR;
}
+
+ /* The 'charPtr' arg must be a single Unicode */
+ if (charPtr != NULL) {
+ if (Tcl_GetCharLength(charPtr) != 1) {
+ resultPtr = Tcl_NewStringObj("expected a single character "
+ "but got \"", -1);
+ Tcl_AppendLimitedToObj(resultPtr, Tcl_GetString(charPtr),
+ -1, 40, "...");
+ Tcl_AppendToObj(resultPtr, "\"", -1);
+ Tcl_SetObjResult(interp, resultPtr);
+ return TCL_ERROR;
+ }
+ uniChar = Tcl_GetUniChar(charPtr, 0);
+ }
+
+ /* Find the font */
tkfont = Tk_AllocFontFromObj(interp, tkwin, objv[2]);
if (tkfont == NULL) {
return TCL_ERROR;
}
- objc -= skip;
- objv += skip;
+
+ /* Determine the font attributes */
+ if (charPtr == NULL) {
faPtr = GetFontAttributes(tkfont);
- objPtr = NULL;
- if (objc > 3) {
- objPtr = objv[3];
+ } else {
+ TkpGetFontAttrsForChar(tkwin, tkfont, uniChar, &fa);
+ faPtr = &fa;
}
- result = GetAttributeInfoObj(interp, faPtr, objPtr);
+ result = GetAttributeInfoObj(interp, faPtr, optPtr);
+
Tk_FreeFont(tkfont);
return result;
}
diff --git a/generic/tkFont.h b/generic/tkFont.h
index cc362fb..9ea3488 100644
--- a/generic/tkFont.h
+++ b/generic/tkFont.h
@@ -10,7 +10,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkFont.h,v 1.8 2006/03/22 00:21:16 das Exp $
+ * RCS: @(#) $Id: tkFont.h,v 1.9 2006/12/01 20:14:23 kennykb Exp $
*/
#ifndef _TKFONT
@@ -27,7 +27,7 @@
* attributes gotten when the font was instantiated.
*/
-typedef struct TkFontAttributes {
+struct TkFontAttributes {
Tk_Uid family; /* Font family, or NULL to represent plaform-
* specific default system font. */
int size; /* Pointsize of font, 0 for default size, or
@@ -36,7 +36,7 @@ typedef struct TkFontAttributes {
int slant; /* Slant flag; see below for def'n. */
int underline; /* Non-zero for underline font. */
int overstrike; /* Non-zero for overstrike font. */
-} TkFontAttributes;
+};
/*
* Possible values for the "weight" field in a TkFontAttributes structure.
diff --git a/generic/tkInt.h b/generic/tkInt.h
index 7a5335f..2e1679e 100644
--- a/generic/tkInt.h
+++ b/generic/tkInt.h
@@ -11,7 +11,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: $Id: tkInt.h,v 1.74 2006/10/31 01:42:25 hobbs Exp $
+ * RCS: $Id: tkInt.h,v 1.75 2006/12/01 20:14:23 kennykb Exp $
*/
#ifndef _TKINT
@@ -71,6 +71,7 @@
*/
typedef struct TkColormap TkColormap;
+typedef struct TkFontAttributes TkFontAttributes;
typedef struct TkGrabEvent TkGrabEvent;
typedef struct TkpCursor_ *TkpCursor;
typedef struct TkRegion_ *TkRegion;
@@ -1180,6 +1181,9 @@ MODULE_SCOPE void TkUnderlineCharsInContext(Display *display,
Drawable drawable, GC gc, Tk_Font tkfont,
const char *string, int numBytes, int x, int y,
int firstByte, int lastByte);
+MODULE_SCOPE void TkpGetFontAttrsForChar(Tk_Window tkwin, Tk_Font tkfont,
+ Tcl_UniChar c,
+ struct TkFontAttributes *faPtr);
/*
* Unsupported commands.
diff --git a/macosx/tkMacOSXFont.c b/macosx/tkMacOSXFont.c
index 280e649..25689c5 100644
--- a/macosx/tkMacOSXFont.c
+++ b/macosx/tkMacOSXFont.c
@@ -35,7 +35,7 @@
* that such fonts can not be used for controls, because controls
* definitely require a family id (this assertion needs testing).
*
- * RCS: @(#) $Id: tkMacOSXFont.c,v 1.19 2006/07/20 06:25:19 das Exp $
+ * RCS: @(#) $Id: tkMacOSXFont.c,v 1.20 2006/12/01 20:14:23 kennykb Exp $
*/
#include "tkMacOSXInt.h"
@@ -465,6 +465,38 @@ TkpGetSubFonts(
}
/*
+ *----------------------------------------------------------------------
+ *
+ * TkpGetFontAttrsForChar --
+ *
+ * Retrieve the font attributes of the actual font used to render
+ * a given character.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The font attributes are stored in *faPtr.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpGetFontAttrsForChar(
+ Tk_Window tkwin, /* Window on the font's display */
+ Tk_Font tkfont, /* Font to query */
+ Tcl_UniChar c, /* Character of interest */
+ TkFontAttributes* faPtr) /* Output: Font attributes */
+{
+ /*
+ * Once again, we don't know what ATSU is doing for us. Simply
+ * return the attributes of the base font.
+ */
+ TkMacOSXFont* fontPtr = (TkMacOSXFont*) tkfont;
+ *faPtr = fontPtr->font.fa;
+}
+
+/*
*---------------------------------------------------------------------------
*
* Tk_MeasureChars --
diff --git a/tests/font.test b/tests/font.test
index e573bc9..8dbaf0f 100644
--- a/tests/font.test
+++ b/tests/font.test
@@ -6,7 +6,7 @@
# Copyright (c) 1998-1999 by Scriptics Corporation.
# All rights reserved.
#
-# RCS: @(#) $Id: font.test,v 1.13 2006/03/22 00:21:18 das Exp $
+# RCS: @(#) $Id: font.test,v 1.14 2006/12/01 20:14:23 kennykb Exp $
package require tcltest 2.1
eval tcltest::configure $argv
@@ -115,11 +115,11 @@ test font-4.1 {font command: actual: arguments} {
test font-4.2 {font command: actual: arguments} {
# (objc < 3)
list [catch {font actual} msg] $msg
-} {1 {wrong # args: should be "font actual font ?-displayof window? ?option?"}}
+} {1 {wrong # args: should be "font actual font ?-displayof window? ?option? ?--? ?char?"}}
test font-4.3 {font command: actual: arguments} {
# (objc - skip > 4) when skip == 0
list [catch {font actual xyz abc def} msg] $msg
-} {1 {wrong # args: should be "font actual font ?-displayof window? ?option?"}}
+} {1 {wrong # args: should be "font actual font ?-displayof window? ?option? ?--? ?char?"}}
test font-4.4 {font command: actual: displayof specified, so skip to next} {
catch {font actual xyz -displayof . -size}
} {0}
@@ -129,7 +129,7 @@ test font-4.5 {font command: actual: displayof specified, so skip to next} {
test font-4.6 {font command: actual: arguments} {
# (objc - skip > 4) when skip == 2
list [catch {font actual xyz -displayof . abc def} msg] $msg
-} {1 {wrong # args: should be "font actual font ?-displayof window? ?option?"}}
+} {1 {wrong # args: should be "font actual font ?-displayof window? ?option? ?--? ?char?"}}
test font-4.7 {font command: actual: arguments} {noExceed} {
# (tkfont == NULL)
list [catch {font actual "\{xyz"} msg] $msg
@@ -1334,6 +1334,36 @@ test font-45.4 {TkFontGetAliasList: match} {unix noExceed} {
font actual {{times new roman} 10} -family
} [font actual {times 10} -family]
+test font-46.1 {font actual, with character, no option, no --} \
+ -body {
+ font actual {times 10} a
+ } \
+ -match glob \
+ -result "-family [font actual {times 10} -family] -size *\
+ -slant roman -underline 0 -overstrike 0"
+
+test font-46.2 {font actual, with character introduced by --} \
+ -body {
+ font actual {times 10} -- -
+ } \
+ -match glob \
+ -result "-family [font actual {times 10} -family] -size *\
+ -slant roman -underline 0 -overstrike 0"
+
+test font-46.3 {font actual, with character and option} {
+ font actual {times 10} -family a
+} [font actual {times 10} -family]
+
+test font-46.4 {font actual, with character, option and --} {
+ font actual {times 10} -family -- -
+} [font actual {times 10} -family]
+
+test font-46.5 {font actual, too many chars} {
+ list [catch {
+ font actual {times 10} 123456789012345678901234567890123456789012345678901
+ } result] $result
+} {1 {expected a single character but got "1234567890123456789012345678901234567..."}}
+
setup
destroy .b
diff --git a/unix/tkUnixFont.c b/unix/tkUnixFont.c
index 9174f8e..0ab8fb5 100644
--- a/unix/tkUnixFont.c
+++ b/unix/tkUnixFont.c
@@ -9,7 +9,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkUnixFont.c,v 1.29 2006/10/05 21:27:43 hobbs Exp $
+ * RCS: @(#) $Id: tkUnixFont.c,v 1.30 2006/12/01 20:14:23 kennykb Exp $
*/
#include "tkUnixInt.h"
@@ -930,6 +930,44 @@ TkpGetSubFonts(
}
/*
+ *----------------------------------------------------------------------
+ *
+ * TkpGetFontAttrsForChar --
+ *
+ * Retrieve the font attributes of the actual font used to render
+ * a given character.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The font attributes are stored in *faPtr.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpGetFontAttrsForChar(
+ Tk_Window tkwin, /* Window on the font's display */
+ Tk_Font tkfont, /* Font to query */
+ Tcl_UniChar c, /* Character of interest */
+ TkFontAttributes* faPtr) /* Output: Font attributes */
+{
+ FontAttributes atts;
+ UnixFont *fontPtr = (UnixFont *) tkfont;
+ /* Structure describing the logical font */
+ SubFont *lastSubFontPtr = &fontPtr->subFontArray[0];
+ /* Pointer to subfont array in case
+ * FindSubFontForChar needs to fix up the
+ * memory allocation */
+ SubFont *thisSubFontPtr = FindSubFontForChar(fontPtr, c, &lastSubFontPtr);
+ /* Pointer to the subfont to use for the
+ * given character */
+ GetFontAttributes(Tk_Display(tkwin), thisSubFontPtr->fontStructPtr, &atts);
+ *faPtr = atts.fa;
+}
+
+/*
*---------------------------------------------------------------------------
*
* Tk_MeasureChars --
diff --git a/unix/tkUnixRFont.c b/unix/tkUnixRFont.c
index 407bcf6..285ac8e 100644
--- a/unix/tkUnixRFont.c
+++ b/unix/tkUnixRFont.c
@@ -8,7 +8,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkUnixRFont.c,v 1.13 2006/03/23 22:08:51 rmax Exp $
+ * RCS: @(#) $Id: tkUnixRFont.c,v 1.14 2006/12/01 20:14:23 kennykb Exp $
*/
#include "tkUnixInt.h"
@@ -469,6 +469,66 @@ TkpGetSubFonts(
Tcl_SetObjResult(interp, resultPtr);
}
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpGetFontAttrsForChar --
+ *
+ * Retrieve the font attributes of the actual font used to render
+ * a given character.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The font attributes are stored in *faPtr.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpGetFontAttrsForChar(
+ Tk_Window tkwin, /* Window on the font's display */
+ Tk_Font tkfont, /* Font to query */
+ Tcl_UniChar c, /* Character of interest */
+ TkFontAttributes* faPtr) /* Output: Font attributes */
+{
+ UnixFtFont *fontPtr = (UnixFtFont*) tkfont;
+ /* Structure describing the logical font */
+ FcChar32 ucs4 = (FcChar32) c;
+ /* UCS-4 character to map */
+ XftFont *xftFontPtr = GetFont(fontPtr, ucs4);
+ /* Actual font used to render the character */
+ const char* family; /* Font family name */
+ double size; /* Font size */
+ int weight; /* Font weight */
+ int slant; /* Font slant */
+
+ if (XftPatternGetString(xftFontPtr->pattern, XFT_FAMILY, 0,
+ &family) != XftResultMatch) {
+ family = "Unknown";
+ }
+ if (XftPatternGetDouble(xftFontPtr->pattern, XFT_SIZE, 0,
+ &size) != XftResultMatch) {
+ size = 12.0;
+ }
+ if (XftPatternGetInteger(xftFontPtr->pattern, XFT_WEIGHT, 0,
+ &weight) != XftResultMatch) {
+ weight = XFT_WEIGHT_MEDIUM;
+ }
+ if (XftPatternGetInteger(xftFontPtr->pattern, XFT_SLANT, 0,
+ &slant) != XftResultMatch) {
+ slant = XFT_SLANT_ROMAN;
+ }
+ faPtr->family = Tk_GetUid(family);
+ faPtr->size = (int) size;
+ faPtr->weight = (weight > XFT_WEIGHT_MEDIUM) ? TK_FW_BOLD : TK_FW_NORMAL;
+ faPtr->slant = (slant > XFT_SLANT_ROMAN) ? TK_FS_ITALIC : TK_FS_ROMAN;
+ faPtr->underline = fontPtr->font.fa.underline;
+ faPtr->overstrike = fontPtr->font.fa.overstrike;
+
+}
+
int
Tk_MeasureChars(
Tk_Font tkfont, /* Font in which characters will be drawn. */
diff --git a/win/tkWinFont.c b/win/tkWinFont.c
index bddaed9..564471d 100644
--- a/win/tkWinFont.c
+++ b/win/tkWinFont.c
@@ -11,7 +11,7 @@
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkWinFont.c,v 1.27 2006/03/22 00:21:20 das Exp $
+ * RCS: @(#) $Id: tkWinFont.c,v 1.28 2006/12/01 20:14:24 kennykb Exp $
*/
#include "tkWinInt.h"
@@ -561,6 +561,62 @@ TkpGetSubFonts(
}
/*
+ *----------------------------------------------------------------------
+ *
+ * TkpGetFontAttrsForChar --
+ *
+ * Retrieve the font attributes of the actual font used to render
+ * a given character.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The font attributes are stored in *faPtr.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpGetFontAttrsForChar(
+ Tk_Window tkwin, /* Window on the font's display */
+ Tk_Font tkfont, /* Font to query */
+ Tcl_UniChar c, /* Character of interest */
+ TkFontAttributes* faPtr) /* Output: Font attributes */
+{
+ WinFont *fontPtr = (WinFont *) tkfont;
+ /* Structure describing the logical font */
+ HDC hdc = GetDC(fontPtr->hwnd);
+ /* GDI device context */
+ SubFont *lastSubFontPtr = &fontPtr->subFontArray[0];
+ /* Pointer to subfont array in case
+ * FindSubFontForChar needs to fix up
+ * the memory allocation */
+ SubFont *thisSubFontPtr = FindSubFontForChar(fontPtr, c,
+ &lastSubFontPtr);
+ /* Pointer to the subfont to use for
+ * the given character */
+ FontFamily *familyPtr = thisSubFontPtr->familyPtr;
+ HFONT oldfont; /* Saved font from the device context */
+ TEXTMETRIC tm; /* Font metrics of the selected subfont */
+
+
+ /* Get the font attributes */
+
+ oldfont = SelectObject(hdc, thisSubFontPtr->hFont);
+ GetTextMetrics(hdc, &tm);
+ SelectObject(hdc, oldfont);
+ ReleaseDC(fontPtr->hwnd, hdc);
+ faPtr->family = familyPtr->faceName;
+ faPtr->size = TkFontGetPoints(tkwin,
+ tm.tmInternalLeading - tm.tmHeight);
+ faPtr->weight = (tm.tmWeight > FW_MEDIUM) ? TK_FW_BOLD : TK_FW_NORMAL;
+ faPtr->slant = tm.tmItalic ? TK_FS_ITALIC : TK_FS_ROMAN;
+ faPtr->underline = (tm.tmUnderlined != 0);
+ faPtr->overstrike = fontPtr->font.fa.overstrike;
+}
+
+/*
*---------------------------------------------------------------------------
*
* Tk_MeasureChars --
generated by cgit v0.12 at 2024-11-08 08:45:12 (GMT)