From 49ed3ac9081b8699b51799bd546e347937304a1b Mon Sep 17 00:00:00 2001
From: Fabien Costantini <fabien@onepost.net>
Date: Wed, 14 Jan 2009 17:59:49 +0000
Subject: STR#890 non-lazy fix: as suggested, replaced the one level color
 attribute saving by a better font style stack including the color in its font
 style elements. Took this opportunity to remove the separated font stack
 (font and size) tables by an opaque and dedicated font stack object
 implementation. This permits i.e to change easily the stack size or even
 impl. (like a linked list impl.) without impacting the widget code.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@6633 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 FL/Fl_Help_View.H | 75 ++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 60 insertions(+), 15 deletions(-)

(limited to 'FL/Fl_Help_View.H')

diff --git a/FL/Fl_Help_View.H b/FL/Fl_Help_View.H
index a98e40ed0..aff5099c3 100644
--- a/FL/Fl_Help_View.H
+++ b/FL/Fl_Help_View.H
@@ -84,6 +84,59 @@ struct Fl_Help_Link
 };
 
 /** Fl_Help_Target structure */
+
+/*
+ * Fl_Help_View font stack opaque implementation
+ */
+
+/** Fl_Help_View font stack element definition */
+struct Fl_Help_Font_Style {
+  Fl_Font      f;  ///< Font
+  Fl_Fontsize  s;  ///< Font Size
+  Fl_Color     c;  ///< Font Color
+  void get(Fl_Font &afont, Fl_Fontsize &asize, Fl_Color &acolor) {afont=f; asize=s; acolor=c;} ///< Gets current font attributes
+  void set(Fl_Font afont, Fl_Fontsize asize, Fl_Color acolor) {f=afont; s=asize; c=acolor;} ///< Sets current font attributes
+  Fl_Help_Font_Style(Fl_Font afont, Fl_Fontsize asize, Fl_Color acolor) {set(afont, asize, acolor);}
+  Fl_Help_Font_Style(){} // For in table use
+};
+
+/** Fl_Help_View font stack definition */
+const size_t MAX_FL_HELP_FS_ELTS = 100;
+
+struct Fl_Help_Font_Stack {
+  /** font stack construction, initialize attributes.*/
+  Fl_Help_Font_Stack() {
+    nfonts_ = 0;
+  }
+
+  void init(Fl_Font f, Fl_Fontsize s, Fl_Color c) { 
+    nfonts_ = 0;
+    elts_[nfonts_].set(f, s, c);
+    fl_font(f, s); 
+    fl_color(c);
+  }
+  /** Gets the top (current) elt on the stack */
+  void top(Fl_Font &f, Fl_Fontsize &s, Fl_Color &c) { elts_[nfonts_].get(f, s, c); }
+  /** Pushes the font style triplet on the stack, also calls fl_font() & fl_color() adequately */
+  void push(Fl_Font f, Fl_Fontsize s, Fl_Color c) { 
+    if (nfonts_ <  MAX_FL_HELP_FS_ELTS-1) nfonts_ ++;
+    elts_[nfonts_].set(f, s, c);
+    fl_font(f, s); fl_color(c); 
+  }
+  /** Pops from the stack the font style triplet and calls fl_font() & fl_color() adequately */
+  void pop(Fl_Font &f, Fl_Fontsize &s, Fl_Color &c) { 
+    top(f, s, c);
+    fl_font(f, s); fl_color(c);
+    if (nfonts_ > 0) nfonts_ --;
+  }
+  /** Gets the current count of font style elts in the stack */
+  size_t count() const {return nfonts_;} /// Gets the current number of fonts in the stack
+
+protected:
+  size_t nfonts_;		///< current number of fonts in stack
+  Fl_Help_Font_Style elts_[100]; ///< font eletments
+};
+
 struct Fl_Help_Target
 {
   char		name[32];	///< Target name
@@ -107,15 +160,11 @@ class FL_EXPORT Fl_Help_View : public Fl_Group	//// Help viewer widget
   Fl_Font       textfont_;		///< Default font for text
   Fl_Fontsize  textsize_;		///< Default font size
   const char	*value_;		///< HTML text value
-
+  Fl_Help_Font_Stack fstack_;           ///< font stack management
   int		nblocks_,		///< Number of blocks/paragraphs
 		ablocks_;		///< Allocated blocks
   Fl_Help_Block	*blocks_;		///< Blocks
 
-  int		nfonts_;		///< Number of fonts in stack
-  Fl_Font       fonts_[100];		///< Font stack
-  Fl_Fontsize  font_sizes_[100];        ///< Font Size stack
-
   Fl_Help_Func	*link_;			///< Link transform function
 
   int		nlinks_,		///< Number of links
@@ -150,6 +199,12 @@ class FL_EXPORT Fl_Help_View : public Fl_Group	//// Help viewer widget
   static Fl_Color hv_selection_color;
   static Fl_Color hv_selection_text_color;
 
+
+  void initfont(Fl_Font &f, Fl_Fontsize &s, Fl_Color &c) { f = textfont_; s = textsize_; c = textcolor_; fstack_.init(f, s, c); }
+  void pushfont(Fl_Font f, Fl_Fontsize s) {fstack_.push(f, s, textcolor_);}
+  void pushfont(Fl_Font f, Fl_Fontsize s, Fl_Color c) {fstack_.push(f, s, c);}
+  void popfont(Fl_Font &f, Fl_Fontsize &s, Fl_Color &c) {fstack_.pop(f, s, c);}
+
   Fl_Help_Block	*add_block(const char *s, int xx, int yy, int ww, int hh, uchar border = 0);
   void		add_link(const char *n, int xx, int yy, int ww, int hh);
   void		add_target(const char *n, int yy);
@@ -166,16 +221,6 @@ class FL_EXPORT Fl_Help_View : public Fl_Group	//// Help viewer widget
   int		get_length(const char *l);
   int		handle(int);
 
-  void		initfont(Fl_Font &f, Fl_Fontsize &s) { nfonts_ = 0;
-			fl_font(f = fonts_[0] = textfont_,
-			        s = font_sizes_[0] = textsize_); }
-  void		pushfont(Fl_Font f, Fl_Fontsize s) { if (nfonts_ < 99) nfonts_ ++;
-			fl_font(fonts_[nfonts_] = f,
-			        font_sizes_[nfonts_] = s); }
-  void		popfont(Fl_Font &f, Fl_Fontsize &s) { if (nfonts_ > 0) nfonts_ --;
-			fl_font(f = fonts_[nfonts_],
-			        s = font_sizes_[nfonts_]); }
-
   void          hv_draw(const char *t, int x, int y);
   char          begin_selection();
   char          extend_selection();
-- 
cgit v1.2.3