font_metrics split, ok from asger (And it's obvious anyway ...)

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@4368 a592a061-630c-0410-9148-cb99ea01b6c8

src/frontends/ChangeLog

@@ -1,3 +1,7 @@
+2002-06-11  John Levon  <moz@compsoc.man.ac.uk>
+
+	* font_metrics.h: move X-specific stuff out of namespace
+ 
 2002-06-07  Angus Leeming  <leeming@lyx.org>
 
 	Fixes needed to compile with Compaq cxx 6.5.

src/frontends/font_metrics.h

@@ -1,3 +1,85 @@
-//// temporary
+// -*- C++ -*-
+/**
+ * \file font_metrics.h
+ * Copyright 1995-2002 the LyX Team
+ * Read the file COPYING
+ *
+ * \author unknown
+ * \author John Levon <moz@compsoc.man.ac.uk>
+ */
 
-#include "xforms/xfont_metrics.h"
+#ifndef FONT_METRICS_H
+#define FONT_METRICS_H
+
+#include "LString.h"
+
+class LyXFont;
+
+/**
+ * A namespace holding helper functions for determining
+ * the screen dimensions of fonts.
+ *
+ * The geometry is the standard typographical geometry,
+ * as follows :
+ *                                                                
+ * --------------+------------------<maxAscent
+ *               |          |
+ *               <-------> (right bearing)
+ *               <-> (left bearing)
+ * char ascent>___          |
+ *               ^   oooo   |  oooo              
+ *   origin>____ |  oo  oo  | oo  oo             
+ *              \|  oo  oo  | oo  oo             
+ * --------------+---ooooo--|--oooo-<baseline  
+ *               |      oo  |                 
+ * char          |  oo  oo  |                
+ * descent>______|   oooo   |                
+ *               <-  width ->
+ * --------------+----------+-------<maxDescent
+ *  
+ */
+namespace font_metrics {
+	/// return the maximum ascent of the font
+	int maxAscent(LyXFont const & f);
+	/// return the maximum descent of the font
+	int maxDescent(LyXFont const & f);
+	/// return the ascent of the char in the font
+	int ascent(char c, LyXFont const & f);
+	/// return the descent of the char in the font
+	int descent(char c, LyXFont const & f);
+	/// return the left bearing of the char in the font
+	int lbearing(char c, LyXFont const & f);
+	/// return the right bearing of the char in the font
+	int rbearing(char c, LyXFont const & f);
+	/// return the width of the string in the font
+	int width(char const * s, size_t n, LyXFont const & f);
+	/// return the width of the char in the font
+	inline int width(char c, LyXFont const & f) {
+		return width(&c, 1, f);
+	}
+	/// return the width of the string in the font
+	inline int width(string const & s, LyXFont const & f) {
+		if (s.empty()) return 0;
+		return width(s.data(), s.length(), f);
+	}
+	/// FIXME ??
+	int signedWidth(string const & s, LyXFont const & f);
+	/** 
+	 * fill in width,ascent,descent with the values for the
+	 * given string in the font.
+	 */
+	void rectText(string const & str, LyXFont const & font,
+		int & width, 
+		int & ascent, 
+		int & descent);
+	/** 
+	 * fill in width,ascent,descent with the values for the
+	 * given string in the font for a button.
+	 */
+	void buttonText(string const & str, LyXFont const & font,
+		int & width, 
+		int & ascent, 
+		int & descent);
+};
+
+#endif // FONT_METRICS_H

src/frontends/xforms/ChangeLog

@@ -1,3 +1,9 @@
+2002-06-11  John Levon  <moz@compsoc.man.ac.uk>
+
+	* xfont_metrics.h:
+	* xfont_metrics.C:
+	* XPainter.C: X-specific metrics stuff moved into xforms/ only
+
 2002-06-11  Edwin Leuven  <leuven@fee.uva.nl>
  
  	* FormParagraph.[Ch]: moved to mvc

src/frontends/xforms/XPainter.C

@@ -220,7 +220,7 @@ PainterBase & Painter::text(int x, int y, char const * s, size_t ls,
 
 	GC gc = lyxColorHandler->getGCForeground(f.realColor());
 	if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
-		font_metrics::XSetFont(display(), gc, f);
+		xfont_metrics::XSetFont(display(), gc, f);
 		XDrawString(display(), owner.getPixmap(), gc, x, y, s, ls);
 	} else {
 		LyXFont smallfont(f);
@@ -229,15 +229,15 @@ PainterBase & Painter::text(int x, int y, char const * s, size_t ls,
 		for (size_t i = 0; i < ls; ++i) {
 			char const c = uppercase(s[i]);
 			if (c != s[i]) {
-				font_metrics::XSetFont(display(), gc, smallfont);
+				xfont_metrics::XSetFont(display(), gc, smallfont);
 				XDrawString(display(), owner.getPixmap(), gc,
 					    tmpx, y, &c, 1);
-				tmpx += font_metrics::XTextWidth(smallfont, &c, 1);
+				tmpx += xfont_metrics::XTextWidth(smallfont, &c, 1);
 			} else {
-				font_metrics::XSetFont(display(), gc, f);
+				xfont_metrics::XSetFont(display(), gc, f);
 				XDrawString(display(), owner.getPixmap(), gc,
 					    tmpx, y, &c, 1);
-				tmpx += font_metrics::XTextWidth(f, &c, 1);
+				tmpx += xfont_metrics::XTextWidth(f, &c, 1);
 			}
 		}
 	}
@@ -255,7 +255,7 @@ PainterBase & Painter::text(int x, int y, XChar2b const * s, int ls,
 {
 	GC gc = lyxColorHandler->getGCForeground(f.realColor());
 	if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
-		font_metrics::XSetFont(display(), gc, f);
+		xfont_metrics::XSetFont(display(), gc, f);
 		XDrawString16(display(), owner.getPixmap(), gc, x, y, s, ls);
 	} else {
 		LyXFont smallfont(f);
@@ -270,21 +270,21 @@ PainterBase & Painter::text(int x, int y, XChar2b const * s, int ls,
 				c.byte2 = uppercase(s[i].byte2);
 			}
 			if (c.byte2 != s[i].byte2) {
-				font_metrics::XSetFont(display(), gc, smallfont);
+				xfont_metrics::XSetFont(display(), gc, smallfont);
 				XDrawString16(display(), owner.getPixmap(), gc,
 					      tmpx, y, &c, 1);
-				tmpx += font_metrics::XTextWidth16(smallfont, &c, 1);
+				tmpx += xfont_metrics::XTextWidth16(smallfont, &c, 1);
 			} else {
-				font_metrics::XSetFont(display(), gc, f);
+				xfont_metrics::XSetFont(display(), gc, f);
 				XDrawString16(display(), owner.getPixmap(), gc,
 					      tmpx, y, &c, 1);
-				tmpx += font_metrics::XTextWidth16(f, &c, 1);
+				tmpx += xfont_metrics::XTextWidth16(f, &c, 1);
 			}
 		}
 	}
 
 	if (f.underbar() == LyXFont::ON) {
-		underline(f, x, y, font_metrics::width(s, ls, f));
+		underline(f, x, y, xfont_metrics::width(s, ls, f));
 	}
 
 	return *this;

src/frontends/xforms/xfont_metrics.C

@@ -1,17 +1,17 @@
-/* This file is part of
+/**
- * ======================================================
+ * \file xfont_metrics.C
+ * Copyright 1995-2002 the LyX Team
+ * Read the file COPYING
  *
- *           LyX, The Document Processor
+ * \author unknown
- *
+ * \author John Levon <moz@compsoc.man.ac.uk>
- *           Copyright 1995 Matthias Ettrich
+ */
- *           Copyright 1995-2001 The LyX Team.
- *
- * ====================================================== */
 
 #include <config.h>
 
 #ifdef __GNUG__
-#pragma implementation
+#pragma implementation "frontends/font_metrics.h"
+#pragma implementation "frontends/xfont_metrics.h"
 #endif
 
 #include "support/lstrings.h"
@@ -28,8 +28,9 @@ namespace {
 inline
 XFontStruct * getXFontstruct(LyXFont const & f)
 {
-	return fontloader.load(f.family(), f.series(),
+	return fontloader.load
-			       f.realShape(), f.size());
+		(f.family(), f.series(),
+		f.realShape(), f.size());
 }
 
 
@@ -41,84 +42,74 @@ XID getFontID(LyXFont const & f)
 
 } // namespace anon
 
-int font_metrics::maxAscent(LyXFont const & f)
+ 
+namespace font_metrics {
+ 
+int maxAscent(LyXFont const & f)
 {
 	return getXFontstruct(f)->ascent;
 }
 
 
-int font_metrics::maxDescent(LyXFont const & f)
+int maxDescent(LyXFont const & f)
 {
 	return getXFontstruct(f)->descent;
 }
 
 
-int font_metrics::ascent(char c, LyXFont const & f)
+int ascent(char c, LyXFont const & f)
 {
 	XFontStruct * finfo = getXFontstruct(f);
 	unsigned int uc = static_cast<unsigned char>(c);
 	if (finfo->per_char
 	    && uc >= finfo->min_char_or_byte2
-	    && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
+	    && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1) 
 		return finfo->per_char[uc - finfo->min_char_or_byte2].ascent;
 	else
 		return finfo->ascent;
 }
 
 
-int font_metrics::descent(char c, LyXFont const & f)
+int descent(char c, LyXFont const & f)
 {
 	XFontStruct * finfo = getXFontstruct(f);
 	unsigned int uc = static_cast<unsigned char>(c);
 	if (finfo->per_char
 	    && uc >= finfo->min_char_or_byte2
-	    && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
+	    && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1) 
 		return finfo->per_char[uc - finfo->min_char_or_byte2].descent;
 	else
 		return finfo->descent;
 }
 
 
-int font_metrics::lbearing(char c, LyXFont const & f)
+int lbearing(char c, LyXFont const & f)
 {
 	XFontStruct * finfo = getXFontstruct(f);
 	unsigned int uc = static_cast<unsigned char>(c);
 	if (finfo->per_char
 	    && uc >= finfo->min_char_or_byte2
-	    && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
+	    && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1) 
 		return finfo->per_char[uc - finfo->min_char_or_byte2].lbearing;
 	else
 		return 0;
 }
 
 
-int font_metrics::rbearing(char c, LyXFont const & f)
+int rbearing(char c, LyXFont const & f)
 {
 	XFontStruct * finfo = getXFontstruct(f);
 	unsigned int uc = static_cast<unsigned char>(c);
 	if (finfo->per_char
 	    && uc >= finfo->min_char_or_byte2
-	    && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1)
+	    && uc <= finfo->max_char_or_byte2+256*finfo->max_byte1) 
 		return finfo->per_char[uc - finfo->min_char_or_byte2].rbearing;
 	else
 		return width(c, f);
 }
 
 
-int font_metrics::width(char c, LyXFont const & f)
+int width(char const * s, size_t n, LyXFont const & f)
-{ 
-	return width(&c, 1, f);
-}
-
-
-int font_metrics::width(string const & s, LyXFont const & f)
-{
-	if (s.empty()) return 0;
-	return width(s.data(), s.length(), f);
-}
- 
- 
-int font_metrics::width(char const * s, size_t n, LyXFont const & f)
 {
 	if (!lyxrc.use_gui)
 		return n;
@@ -138,8 +129,8 @@ int font_metrics::width(char const * s, size_t n, LyXFont const & f)
 			Uchar c = encoding->ucs(s[i]);
 			xs[i].byte1 = c >> 8;
 			xs[i].byte2 = c & 0xff;
-		}
+                }
-		int result = width(xs.get(), n, font);
+		int result = xfont_metrics::width(xs.get(), n, font);
 		return result;
 	}
 
@@ -147,7 +138,7 @@ int font_metrics::width(char const * s, size_t n, LyXFont const & f)
 		return ::XTextWidth(getXFontstruct(f), s, n);
 	} else {
 		// emulate smallcaps since X doesn't support this
-		unsigned int result = 0;
+		int result = 0;
 		LyXFont smallfont(f);
 		smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
 		for (size_t i = 0; i < n; ++i) {
@@ -163,7 +154,7 @@ int font_metrics::width(char const * s, size_t n, LyXFont const & f)
 }
 
 
-int font_metrics::signedWidth(string const & s, LyXFont const & f)
+int signedWidth(string const & s, LyXFont const & f)
 {
 	if (s.empty())
 		return 0;
@@ -174,17 +165,45 @@ int font_metrics::signedWidth(string const & s, LyXFont const & f)
 }
 
 
-//int font_metrics::width(wstring const & s, int n, LyXFont const & f)
+void rectText(string const & str, LyXFont const & font,
-int font_metrics::width(XChar2b const * s, int n, LyXFont const & f)
+	int & width, 
+	int & ascent, 
+	int & descent)
+{
+	static int const d = 2;
+	width = font_metrics::width(str, font) + d * 2 + 2;
+	ascent = font_metrics::maxAscent(font) + d;
+	descent = font_metrics::maxDescent(font) + d;
+}
+
+
+
+void buttonText(string const & str, LyXFont const & font,
+	int & width, 
+	int & ascent, 
+	int & descent)
+{
+	static int const d = 3;
+	
+	width = font_metrics::width(str, font) + d * 2 + 2;
+	ascent = font_metrics::maxAscent(font) + d;
+	descent = font_metrics::maxDescent(font) + d;
+}
+
+} // namespace font_metrics
+ 
+namespace xfont_metrics {
+ 
+int width(XChar2b const * s, int n, LyXFont const & f)
 {
 	if (!lyxrc.use_gui)
 		return n;
-
+	
 	if (f.realShape() != LyXFont::SMALLCAPS_SHAPE) {
 		return ::XTextWidth16(getXFontstruct(f), s, n);
 	} else {
 		// emulate smallcaps since X doesn't support this
-		unsigned int result = 0;
+		int result = 0;
 		static XChar2b c;
 		LyXFont smallfont(f);
 		smallfont.decSize().decSize().setShape(LyXFont::UP_SHAPE);
@@ -204,46 +223,24 @@ int font_metrics::width(XChar2b const * s, int n, LyXFont const & f)
 		return result;
 	}
 }
+ 
 
-int font_metrics::XTextWidth(LyXFont const & f, char const * str, int count)
+int XTextWidth(LyXFont const & f, char const * str, int count)
 {
 	return ::XTextWidth(getXFontstruct(f), str, count);
 }
 
 
-int font_metrics::XTextWidth16(LyXFont const & f, XChar2b const * str, int count)
+int XTextWidth16(LyXFont const & f, XChar2b const * str, int count)
 {
 	return ::XTextWidth16(getXFontstruct(f), str, count);
 }
 
 
-void font_metrics::XSetFont(Display * display, GC gc, LyXFont const & f)
+/// hmm, not a metric !
+void XSetFont(Display * display, GC gc, LyXFont const & f) 
 {
 	::XSetFont(display, gc, getFontID(f));
 }
-
+ 
-
+} // namespace xfont_metrics
-void font_metrics::rectText(string const & str, LyXFont const & font,
-	      int & width, int & ascent, int & descent)
-{
-	static int const d = 2;
-	width = font_metrics::width(str, font) + d * 2 + 2;
-	ascent = font_metrics::maxAscent(font) + d;
-	descent = font_metrics::maxDescent(font) + d;
-}
-
-
-
-void font_metrics::buttonText(string const & str, LyXFont const & font,
-		int & width, int & ascent, int & descent)
-{
-	static int const d = 3;
-
-	width = font_metrics::width(str, font) + d * 2 + 2;
-	ascent = font_metrics::maxAscent(font) + d;
-	descent = font_metrics::maxDescent(font) + d;
-}
-
-
-//} // end of namespace font
-//} // end of namespace lyx

src/frontends/xforms/xfont_metrics.h

@@ -1,58 +1,29 @@
 // -*- C++ -*-
-/* This file is part of
+/**
- * ======================================================
+ * \file xfont_metrics.h
+ * Copyright 1995-2002 the LyX Team
+ * Read the file COPYING
  *
- *           LyX, The Document Processor
+ * \author unknown
- *
+ * \author John Levon <moz@compsoc.man.ac.uk>
- *           Copyright 1995 Matthias Ettrich
+ */
- *           Copyright 1995-2001 The LyX Team.
- *
- * ====================================================== */
 
-#ifndef FONT_H
+#ifndef XFONT_METRICS_H
-#define FONT_H
+#define XFONT_METRICS_H
 
 #ifdef __GNUG__
 #pragma interface
 #endif
 
-#include <X11/Xlib.h>
-
 #include "LString.h"
 
+#include "font_metrics.h"
+ 
+#include <X11/Xlib.h>
+ 
 class LyXFont;
 
-namespace font_metrics {
+namespace xfont_metrics {
-//namespace lyx {
-//namespace font {
-///
-//istruct lyxfont {
-	///
-	int maxAscent(LyXFont const & f);
-	///
-	int maxDescent(LyXFont const & f);
-	///
-	int ascent(char c, LyXFont const & f);
-	///
-	int descent(char c, LyXFont const & f);
-	///
-	int lbearing(char c, LyXFont const & f);
-	///
-	int rbearing(char c, LyXFont const & f);
-	///
-	int width(char const * s, size_t n, LyXFont const & f);
-	///
-	int width(char c, LyXFont const & f);
-	///
-	int width(string const & s, LyXFont const & f);
-	///
-	//static
-	//int width(char const * s, LyXFont const & f) {
-	//	return width(s, strlen(s), f);
-	//}
-	///
-	int signedWidth(string const & s, LyXFont const & f);
-	///
 	int XTextWidth(LyXFont const & f, char const * str, int count);
 	///
 	int width(XChar2b const * s, int n, LyXFont const & f);
@@ -60,30 +31,6 @@ namespace font_metrics {
 	int XTextWidth16(LyXFont const & f, XChar2b const * str, int count);
 	///
 	void XSetFont(Display * display, GC gc, LyXFont const & f);
-	// A couple of more high-level metrics
+} // namespace xfont_metrics
-	///
+ 
-	void rectText(string const & str, LyXFont const & font,
+#endif // FONT_METRICS_H
-		      int & width, int & ascent, int & descent);
-	///
-	void buttonText(string const & str, LyXFont const & font,
-			int & width, int & ascent, int & descent);
-//};
-}
-
-//} // end of namespace font
-
-// import into namespace lyx
-//using font::maxAscent;
-//using font::maxDescent;
-//using font::ascent;
-//using font::descent;
-//using font::lbearing;
-//using font::rbearing;
-//using font::width;
-//using font::signedWidth;
-//using font::XTextWidth;
-//using font::XSetFont;
-
-//} // end of namespace lyx
-
-#endif