fix loading of rotated fonts on style change

ChangeLog

@@ -1,6 +1,8 @@
  (Format: Year/Month/Day)
 Changes for 1.0rc3:
 *07/01/05:
+   * Fix loading of rotated fonts on style change (Simon)
+     FbTk/... FontImp.hh XftFontImp.hh/cc XmbFontImp.hh/cc XFontImp.hh/cc
    * Change default Xft font to "monospace" (was "fixed") (Simon)
      - The "fixed" font loads a bitmap Xfont
      - Note that bitmap fonts do not rotate properly, and especially the 

src/FbTk/FontImp.hh

@@ -44,7 +44,7 @@ class FontImp {
 public:
     virtual ~FontImp() { }
     virtual bool load(const std::string &name) = 0;
-    virtual void drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient) const = 0;
+    virtual void drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient) = 0;
     virtual unsigned int textWidth(const FbString &text, unsigned int size) const = 0;
     virtual bool validOrientation(FbTk::Orientation orient) { return orient == ROT0; }
     virtual int ascent() const = 0;

src/FbTk/XFontImp.cc

@@ -45,8 +45,10 @@ using std::nothrow;
 namespace FbTk {
 
 XFontImp::XFontImp(const char *fontname):m_fontstruct(0) {
-    for (int i = ROT0; i <= ROT270; ++i)
+    for (int i = ROT0; i <= ROT270; ++i) {
         m_rotfonts[i] = 0;
+        m_rotfonts_loaded[i] = false;
+    }
 
     if (fontname != 0)
         load(fontname);
@@ -78,19 +80,23 @@ bool XFontImp::load(const string &fontname) {
 
     m_fontstruct = font; //set new font
 
-    for (int i = ROT0; i <= ROT270; ++i)
+    for (int i = ROT0; i <= ROT270; ++i) {
-        if (m_rotfonts[i] != 0)
+        m_rotfonts_loaded[i] = false;
+        if (m_rotfonts[i] != 0) {
             freeRotFont(m_rotfonts[i]);
+            m_rotfonts[i] = 0;
+        }
+    }
 
     return true;
 }
 
-void XFontImp::drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient) const {
+void XFontImp::drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient) {
     if (m_fontstruct == 0)
         return;
 
     // use roated font functions?
-    if (orient != ROT0 && m_rotfonts[orient] != 0) {
+    if (orient != ROT0 && validOrientation(orient)) {
         drawRotText(w.drawable(), screen, gc, text, len, x, y, orient);
         return;
     }
@@ -389,7 +395,12 @@ bool XFontImp::validOrientation(FbTk::Orientation orient) {
     if (orient == ROT0 || m_rotfonts[orient])
         return true;
 
+    if (m_rotfonts_loaded[orient])
+        return false; // load must have failed
+
+    m_rotfonts_loaded[orient] = true;
     rotate(orient);
+
     return m_rotfonts[orient] != 0;
 }
 

src/FbTk/XFontImp.hh

@@ -40,7 +40,7 @@ public:
     unsigned int height() const;
     int ascent() const;
     int descent() const { return m_fontstruct ? m_fontstruct->descent : 0; }
-    void drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient) const;
+    void drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient);
 
     bool validOrientation(FbTk::Orientation orient);
 
@@ -79,6 +79,7 @@ private:
     void drawRotText(Drawable w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient) const;
 
     XRotFontStruct *m_rotfonts[4]; ///< rotated font structure (only 3 used)
+    bool m_rotfonts_loaded[4]; // whether we've tried yet
     XFontStruct *m_fontstruct; ///< X font structure
 
 };

src/FbTk/XftFontImp.cc

@@ -36,8 +36,10 @@ namespace FbTk {
 XftFontImp::XftFontImp(const char *name, bool utf8):
     m_utf8mode(utf8), m_name("") {
 
-    for (int r = ROT0; r <= ROT270; r++) 
+    for (int r = ROT0; r <= ROT270; r++) {
         m_xftfonts[r] = 0;
+        m_xftfonts_loaded[r] = false;
+    }
 
     if (name != 0)
         load(name);
@@ -62,21 +64,24 @@ bool XftFontImp::load(const std::string &name) {
     }
     
     // destroy all old fonts and set new
-    for (int r = ROT0; r <= ROT270; r++) 
+    for (int r = ROT0; r <= ROT270; r++) {
+        m_xftfonts_loaded[r] = false;
         if (m_xftfonts[r] != 0) {
             XftFontClose(App::instance()->display(), m_xftfonts[r]);
             m_xftfonts[r] = 0;
         }
+    }
 
     m_xftfonts[ROT0] = newxftfont;
+    m_xftfonts_loaded[ROT0] = true;
     m_name = name;
 
     return true;
 }
 
-void XftFontImp::drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient) const {
+void XftFontImp::drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient) {
 
-    if (m_xftfonts[orient] == 0)
+    if (!validOrientation(orient))
         return;
 
     // we adjust y slightly so that the baseline is in the right spot
@@ -212,9 +217,14 @@ bool XftFontImp::validOrientation(FbTk::Orientation orient) {
     if (orient == ROT0 || m_xftfonts[orient])
         return true;
 
+    if (m_xftfonts_loaded[orient])
+        return false; // m_xftfonts is zero here
+
     if (m_xftfonts[ROT0] == 0)
         return false;
 
+    m_xftfonts_loaded[orient] = true;
+
     // otherwise, try to load that orientation
     // radians is actually anti-clockwise, so we reverse it
     double radians = -(orient) * 90 * M_PI / 180;

src/FbTk/XftFontImp.hh

@@ -36,7 +36,7 @@ public:
     XftFontImp(const char *fontname, bool utf8);
     ~XftFontImp();
     bool load(const std::string &name);
-    void drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y , FbTk::Orientation orient) const;
+    void drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y , FbTk::Orientation orient);
     unsigned int textWidth(const FbString &text, unsigned int len) const;
     unsigned int height() const;
     int ascent() const { return m_xftfonts[0] ? m_xftfonts[0]->ascent : 0; }
@@ -47,6 +47,7 @@ public:
 
 private:
     XftFont *m_xftfonts[4]; // 4 possible orientations
+    bool m_xftfonts_loaded[4]; // whether we've tried loading the orientation
     // rotated xft fonts don't give proper extents info, so we keep the "real"
     // one around for it
     bool m_utf8mode;

src/FbTk/XmbFontImp.cc

@@ -190,7 +190,7 @@ bool XmbFontImp::load(const string &fontname) {
 }
 
 void XmbFontImp::drawText(const FbDrawable &d, int screen, GC main_gc, const FbString &text,
-                          size_t len, int x, int y, FbTk::Orientation orient) const {
+                          size_t len, int x, int y, FbTk::Orientation orient) {
 
     if (m_fontset == 0)
         return;

src/FbTk/XmbFontImp.hh

@@ -36,7 +36,7 @@ public:
     XmbFontImp(const char *fontname, bool utf8);
     ~XmbFontImp();
     bool load(const std::string &name);
-    virtual void drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient) const;
+    virtual void drawText(const FbDrawable &w, int screen, GC gc, const FbString &text, size_t len, int x, int y, FbTk::Orientation orient);
     unsigned int textWidth(const FbString &text, unsigned int len) const;
     unsigned int height() const;
     int ascent() const { return m_setextents ? -m_setextents->max_ink_extent.y : 0; }