Make PangoEngine{,Lang,Shape} GObjects, and use a GTypeModule-based

Sat Aug  2 23:19:16 2003  Owen Taylor  <otaylor@redhat.com>

        * pango/pango-engine.[ch] modules/*/*-{fc,win32,x}.c
        pango/modules.c pango/break.c pango/pango-context.c
        pango/pango-layout.c pango/pango-modules.h
        pango/querymodules.c pango/shape.c: Make
        PangoEngine{,Lang,Shape} GObjects, and use a
        GTypeModule-based module-loading system closely based
        on the one used for GtkIMContext and GtkThemeEngine.

        * pango/pango-impl-utils.h: OK, I'm tired of typing
        in get_type() functions.

        * pango/pango-script.[ch] pango/pango-script-table.h
        tests/testscript.c tools/gen-script-table.pl: Add port
        of script-range code from ICU in preparation for future
        use. (#91542)

        * tools/gen-script-for-lang.c: Utility program to determine
        the script for each fontconfig .orth file.

        * docs/tmpl/{scripts.sgml,pango-engine-lang.sgml,
        pango-engine-shape.sgml} docs/pango-sections.txt docs/pango-docs.sgml:
        Redo to go along with the above changes.

        * configure.in: chmod +x tests/runtests.sh

1 files changed, 162 insertions, 0 deletions

diff --git a/pango/pango-engine.c b/pango/pango-engine.c
new file mode 100644
index 00000000..034f5eb6
--- /dev/null
+++ b/pango/pango-engine.c
@@ -0,0 +1,162 @@
+/* Pango
+ * pango-engine.c: Engines for script and language specific processing
+ *
+ * Copyright (C) 2003 Red Hat Software
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "pango-engine.h"
+#include "pango-engine-private.h"
+#include "pango-impl-utils.h"
+
+PANGO_DEFINE_TYPE_ABSTRACT (PangoEngine, pango_engine,
+			    NULL, NULL,
+			    G_TYPE_OBJECT);
+
+PANGO_DEFINE_TYPE_ABSTRACT (PangoEngineLang, pango_engine_lang,
+			    NULL, NULL,
+			    PANGO_TYPE_ENGINE);
+
+static PangoCoverage *
+pango_engine_shape_real_get_coverage (PangoEngineShape *engine,
+				      PangoFont        *font,
+				      PangoLanguage    *language)
+{
+  return pango_font_get_coverage (font, language);
+}
+
+void
+pango_engine_shape_class_init (PangoEngineShapeClass *class)
+{
+  class->get_coverage = pango_engine_shape_real_get_coverage;
+}
+
+PANGO_DEFINE_TYPE_ABSTRACT (PangoEngineShape, pango_engine_shape,
+			    pango_engine_shape_class_init, NULL,
+			    PANGO_TYPE_ENGINE);
+
+void
+_pango_engine_shape_shape (PangoEngineShape *engine,
+			   PangoFont        *font,
+			   const char       *text,
+			   int               length,
+			   PangoAnalysis    *analysis,
+			   PangoGlyphString *glyphs)
+{
+  g_return_if_fail (PANGO_IS_ENGINE_SHAPE (engine));
+  g_return_if_fail (PANGO_IS_FONT (font));
+  g_return_if_fail (text != NULL);
+  g_return_if_fail (analysis != NULL);
+  g_return_if_fail (glyphs != NULL);
+
+  PANGO_ENGINE_SHAPE_GET_CLASS (engine)->script_shape (engine,
+						       font,
+						       text, length,
+						       analysis,
+						       glyphs);
+}
+
+PangoCoverage *
+_pango_engine_shape_get_coverage (PangoEngineShape *engine,
+				  PangoFont        *font,
+				  PangoLanguage    *language)
+{
+  g_return_val_if_fail (PANGO_IS_ENGINE_SHAPE (engine), NULL);
+  g_return_val_if_fail (PANGO_IS_FONT (font), NULL);
+
+  return PANGO_ENGINE_SHAPE_GET_CLASS (engine)->get_coverage (engine,
+							      font,
+							      language);
+}
+
+/* No extra fields needed */
+typedef PangoEngineShape PangoFallbackEngine;
+typedef PangoEngineShapeClass PangoFallbackEngineClass;
+
+static void 
+fallback_engine_shape (PangoEngineShape *engine,
+		       PangoFont        *font,
+                       const char       *text,
+                       gint              length,
+                       PangoAnalysis    *analysis,
+                       PangoGlyphString *glyphs)
+{
+  int n_chars;
+  int i;
+  const char *p;
+  
+  g_return_if_fail (font != NULL);
+  g_return_if_fail (text != NULL);
+  g_return_if_fail (length >= 0);
+  g_return_if_fail (analysis != NULL);
+
+  n_chars = g_utf8_strlen (text, length);
+  pango_glyph_string_set_size (glyphs, n_chars);
+  
+  p = text;
+  i = 0;
+  while (i < n_chars)
+    {
+      glyphs->glyphs[i].glyph = 0;
+      
+      glyphs->glyphs[i].geometry.x_offset = 0;
+      glyphs->glyphs[i].geometry.y_offset = 0;
+      glyphs->glyphs[i].geometry.width = 0;
+
+      glyphs->log_clusters[i] = p - text;
+      
+      ++i;
+      p = g_utf8_next_char (p);
+    }
+}
+
+static PangoCoverage*
+fallback_engine_get_coverage (PangoEngineShape *engine,
+			      PangoFont        *font,
+                              PangoLanguage    *lang)
+{
+  PangoCoverage *result = pango_coverage_new ();
+
+  /* We return an empty coverage (this function won't get
+   * called, but if it is, empty coverage will keep
+   * it from being used).
+   */
+  
+  return result;
+}
+
+static void
+fallback_engine_class_init (PangoEngineShapeClass *class)
+{
+  class->get_coverage = fallback_engine_get_coverage;
+  class->script_shape = fallback_engine_shape;
+}
+
+static PANGO_DEFINE_TYPE (PangoFallbackEngine, pango_fallback_engine,
+			  fallback_engine_class_init, NULL,
+			  PANGO_TYPE_ENGINE_SHAPE);
+
+PangoEngineShape *
+pango_get_fallback_shaper (void)
+{
+  static PangoEngineShape *fallback_shaper = NULL;
+  if (!fallback_shaper)
+    fallback_shaper = g_object_new (pango_fallback_engine_get_type (), NULL);
+
+  return fallback_shaper;
+}
+