[util] Refactor to accommodate for upcoming new tool

util/Makefile.am

@@ -27,11 +27,12 @@ if HAVE_FREETYPE
 if HAVE_CAIRO_FT
 hb_view_SOURCES = \
 	hb-view.cc \
-	hb-view.hh \
-	ansi-print.cc \
-	ansi-print.hh \
 	options.cc \
 	options.hh \
+	main-font-text.hh \
+	shape-consumer.hh \
+	ansi-print.cc \
+	ansi-print.hh \
 	helper-cairo.cc \
 	helper-cairo.hh \
 	helper-cairo-ansi.cc \
@@ -53,9 +54,10 @@ if HAVE_GLIB
 if HAVE_FREETYPE
 hb_shape_SOURCES = \
 	hb-shape.cc \
-	hb-view.hh \
 	options.cc \
 	options.hh \
+	main-font-text.hh \
+	shape-consumer.hh \
 	$(NULL)
 bin_PROGRAMS += hb-shape
 endif

util/hb-shape.cc

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2010  Behdad Esfahbod
- * Copyright © 2011  Google, Inc.
+ * Copyright © 2011,2012  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
@@ -25,59 +25,51 @@
  * Google Author(s): Behdad Esfahbod
  */
 
-#include "hb-view.hh"
+#include "main-font-text.hh"
+#include "shape-consumer.hh"
 
-struct output_buffer_t : output_options_t, format_options_t
+struct output_buffer_t : output_options_t
 {
   output_buffer_t (option_parser_t *parser)
 		  : output_options_t (parser),
-		    format_options_t (parser) {}
+		    format (parser) {}
 
-  void init (const font_options_t *font_opts);
+  void init (const font_options_t *font_opts)
+  {
+    get_file_handle ();
+    gs = g_string_new (NULL);
+    line_no = 0;
+    font = hb_font_reference (font_opts->get_font ());
+  }
   void consume_line (hb_buffer_t  *buffer,
 		     const char   *text,
 		     unsigned int  text_len,
-		     hb_bool_t     utf8_clusters);
+		     hb_bool_t     utf8_clusters)
-  void finish (const font_options_t *font_opts);
+  {
+    line_no++;
+    g_string_set_size (gs, 0);
+    format.serialize_line (buffer, line_no, text, text_len, font, utf8_clusters, gs);
+    fprintf (fp, "%s", gs->str);
+  }
+  void finish (const font_options_t *font_opts)
+  {
+    hb_font_destroy (font);
+    g_string_free (gs, TRUE);
+    gs = NULL;
+    font = NULL;
+  }
 
   protected:
+  format_options_t format;
+
   GString *gs;
-  hb_font_t *font;
   unsigned int line_no;
+  hb_font_t *font;
 };
 
-void
-output_buffer_t::init (const font_options_t *font_opts)
-{
-  get_file_handle ();
-  font = hb_font_reference (font_opts->get_font ());
-  gs = g_string_new (NULL);
-  line_no = 0;
-}
-
-void
-output_buffer_t::consume_line (hb_buffer_t  *buffer,
-			       const char   *text,
-			       unsigned int  text_len,
-			       hb_bool_t     utf8_clusters)
-{
-  line_no++;
-  g_string_set_size (gs, 0);
-  serialize_line (buffer, line_no, text, text_len, font, utf8_clusters, gs);
-  fprintf (fp, "%s", gs->str);
-}
-
-void
-output_buffer_t::finish (const font_options_t *font_opts)
-{
-  g_string_free (gs, TRUE);
-  gs = NULL;
-  hb_font_destroy (font);
-  font = NULL;
-}
-
 int
 main (int argc, char **argv)
 {
-  return hb_view_t<output_buffer_t>::main (argc, argv);
+  main_font_text_t<shape_consumer_t<output_buffer_t> > driver;
+  return driver.main (argc, argv);
 }

util/hb-view.cc

@@ -1,6 +1,6 @@
 /*
  * Copyright © 2010  Behdad Esfahbod
- * Copyright © 2011  Google, Inc.
+ * Copyright © 2011,2012  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
@@ -25,11 +25,13 @@
  * Google Author(s): Behdad Esfahbod
  */
 
-#include "hb-view.hh"
+#include "main-font-text.hh"
+#include "shape-consumer.hh"
 #include "view-cairo.hh"
 
 int
 main (int argc, char **argv)
 {
-  return hb_view_t<view_cairo_t>::main (argc, argv);
+  main_font_text_t<shape_consumer_t<view_cairo_t> > driver;
+  return driver.main (argc, argv);
 }

util/main-font-text.hh

@@ -1,5 +1,5 @@
 /*
- * Copyright © 2011  Google, Inc.
+ * Copyright © 2011,2012  Google, Inc.
  *
  *  This is part of HarfBuzz, a text shaping library.
  *
@@ -26,23 +26,23 @@
 
 #include "options.hh"
 
-#ifndef HB_VIEW_HH
+#ifndef HB_MAIN_FONT_TEXT_HH
-#define HB_VIEW_HH
+#define HB_MAIN_FONT_TEXT_HH
 
-template <typename output_t>
+/* main() body for utilities taking font and processing text.*/
-struct hb_view_t
+
+template <typename consumer_t>
+struct main_font_text_t
 {
-  static int
+  main_font_text_t (void)
+		  : options ("[FONT-FILE] [TEXT]"),
+		    font_opts (&options),
+		    input (&options),
+		    consumer (&options) {}
+
+  int
   main (int argc, char **argv)
   {
-    option_parser_t options ("[FONT-FILE] [TEXT]");
-
-    shape_options_t shaper (&options);
-    font_options_t font_opts (&options);
-    text_options_t input (&options);
-
-    output_t output (&options);
-
     options.parse (&argc, &argv);
 
     argc--, argv++;
@@ -55,26 +55,26 @@ struct hb_view_t
     if (!input.text && !input.text_file)
       input.text_file = "-";
 
-    output.init (&font_opts);
+    consumer.init (&font_opts);
 
     hb_buffer_t *buffer = hb_buffer_create ();
     unsigned int text_len;
     const char *text;
     while ((text = input.get_line (&text_len)))
-    {
+      consumer.consume_line (buffer, text, text_len);
-      if (!shaper.shape (text, text_len,
-			 font_opts.get_font (),
-			 buffer))
-	fail (FALSE, "All shapers failed");
-
-      output.consume_line (buffer, text, text_len, shaper.utf8_clusters);
-    }
     hb_buffer_destroy (buffer);
 
-    output.finish (&font_opts);
+    consumer.finish (&font_opts);
 
     return 0;
   }
+
+  protected:
+  option_parser_t options;
+  font_options_t font_opts;
+  text_options_t input;
+  consumer_t consumer;
 };
 
 #endif
+

util/shape-consumer.hh

@@ -0,0 +1,69 @@
+/*
+ * Copyright © 2011,2012  Google, Inc.
+ *
+ *  This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#include "options.hh"
+
+#ifndef HB_SHAPE_CONSUMER_HH
+#define HB_SHAPE_CONSUMER_HH
+
+
+template <typename output_t>
+struct shape_consumer_t
+{
+  shape_consumer_t (option_parser_t *parser)
+		  : shaper (parser),
+		    output (parser) {}
+
+  void init (const font_options_t *font_opts)
+  {
+    font = hb_font_reference (font_opts->get_font ());
+    output.init (font_opts);
+  }
+  void consume_line (hb_buffer_t  *buffer,
+		     const char   *text,
+		     unsigned int  text_len)
+  {
+    if (!shaper.shape (text, text_len, font, buffer))
+      fail (FALSE, "All shapers failed");
+
+    output.consume_line (buffer, text, text_len, shaper.utf8_clusters);
+  }
+  void finish (const font_options_t *font_opts)
+  {
+    output.finish (font_opts);
+    hb_font_destroy (font);
+    font = NULL;
+  }
+
+  protected:
+  shape_options_t shaper;
+  output_t output;
+
+  hb_font_t *font;
+};
+
+
+#endif