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authorBehdad Esfahbod <behdad@gnome.org>2006-02-08 08:03:18 +0000
committerBehdad Esfahbod <behdad@src.gnome.org>2006-02-08 08:03:18 +0000
commit1a5c19932e6f69c18334ea3adfbcbedecbc9512b (patch)
treec3aba2eb6ea4291bf691604dba4eaeae42290b44 /examples
parent06e938a03071c3127abaee9a0a0c4bf28f8416e7 (diff)
downloadpango-1a5c19932e6f69c18334ea3adfbcbedecbc9512b.tar.gz
Bug 330146 – pango-view --help should list available backends Patch from
2006-02-08 Behdad Esfahbod <behdad@gnome.org> Bug 330146 – pango-view --help should list available backends Patch from Antoine Dopffer. * examples/renderdemo.c: Show backends in --help output.
Diffstat (limited to 'examples')
-rw-r--r--examples/renderdemo.c81
1 files changed, 64 insertions, 17 deletions
diff --git a/examples/renderdemo.c b/examples/renderdemo.c
index 2a157d2b..42bde875 100644
--- a/examples/renderdemo.c
+++ b/examples/renderdemo.c
@@ -244,7 +244,7 @@ do_output (PangoContext *context,
PangoLayout *layout;
PangoRectangle logical_rect;
PangoMatrix matrix = PANGO_MATRIX_INIT;
- const PangoMatrix *orig_matrix;
+ PangoMatrix *orig_matrix;
gboolean supports_matrix;
int rotated_width, rotated_height;
int x = opt_margin;
@@ -402,9 +402,9 @@ parse_hinting (const char *name,
static gboolean
parse_wrap (const char *name,
- const char *arg,
- gpointer data,
- GError **error)
+ const char *arg,
+ gpointer data,
+ GError **error)
{
static GEnumClass *class = NULL;
gboolean ret = TRUE;
@@ -428,6 +428,55 @@ parse_wrap (const char *name,
return ret;
}
+static gchar *
+backends_to_string (void)
+{
+ GString *backends = g_string_new (NULL);
+ const PangoViewer **viewer;
+
+ for (viewer = viewers; *viewer; viewer++)
+ if ((*viewer)->id)
+ {
+ g_string_append (backends, (*viewer)->id);
+ g_string_append_c (backends, '/');
+ }
+ g_string_truncate (backends, MAX (0, (gint)backends->len - 1));
+
+ return g_string_free(backends,FALSE);
+}
+
+static int
+backends_get_count (void)
+{
+ const PangoViewer **viewer;
+ int i = 0;
+
+ for (viewer = viewers; *viewer; viewer++)
+ if ((*viewer)->id)
+ i++;
+
+ return i;
+}
+
+
+static gchar *
+backend_description (void)
+{
+ GString *description = g_string_new("Pango backend to use for rendering ");
+ int backends_count = backends_get_count ();
+
+ if (backends_count > 1)
+ g_string_append_printf(description,"(default: %s)", (*viewers)->id);
+ else if (backends_count == 1)
+ g_string_append_printf(description,"(only available: %s)", (*viewers)->id);
+ else
+ g_string_append_printf(description,"(no backends found!)");
+
+ return g_string_free(description,FALSE);
+
+}
+
+
static gboolean
parse_backend (const char *name,
const char *arg,
@@ -445,17 +494,10 @@ parse_backend (const char *name,
opt_viewer = *viewer;
else
{
- GString *backends = g_string_new (NULL);
-
- for (viewer = viewers; *viewer; viewer++)
- if ((*viewer)->id)
- {
- g_string_append (backends, (*viewer)->id);
- g_string_append_c (backends, '/');
- }
- g_string_truncate (backends, MAX (0, (gint)backends->len - 1));
+ gchar *backends = backends_to_string ();
- fail ("available --backend options are: %s", g_string_free (backends, FALSE));
+ fail ("available --backend options are: %s", backends);
+ g_free(backends);
ret = FALSE;
}
@@ -466,12 +508,15 @@ parse_backend (const char *name,
void
parse_options (int argc, char *argv[])
{
+ gchar *backend_options = backends_to_string();
+ GOptionFlags backend_flag = backends_get_count () > 1 ? 0 : G_OPTION_FLAG_HIDDEN;
+ gchar *backend_desc = backend_description ();
GOptionEntry entries[] =
{
{"no-auto-dir", 0, G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE, &opt_auto_dir,
"No layout direction according to contents", NULL},
- {"backend", 0, 0, G_OPTION_ARG_CALLBACK, &parse_backend,
- "Pango backend to use for rendering", "id"},
+ {"backend", 0, backend_flag, G_OPTION_ARG_CALLBACK, &parse_backend,
+ backend_desc, backend_options},
{"no-display", 'q', G_OPTION_FLAG_REVERSE, G_OPTION_ARG_NONE, &opt_display,
"Do not display (just write to file or whatever)", NULL},
{"dpi", 0, 0, G_OPTION_ARG_INT, &opt_dpi,
@@ -507,7 +552,7 @@ parse_options (int argc, char *argv[])
{"width", 'w', 0, G_OPTION_ARG_INT, &opt_width,
"Width in points to which to wrap output", "points"},
{"wrap", 0, 0, G_OPTION_ARG_CALLBACK, &parse_wrap,
- "Text wrapping mode (needs a width to be set), ", "word/char/word-char"},
+ "Text wrapping mode (needs a width to be set)", "word/char/word-char"},
{NULL}
};
GError *error = NULL;
@@ -532,6 +577,8 @@ parse_options (int argc, char *argv[])
exit(1);
}
g_option_context_free(context);
+ g_free(backend_options);
+ g_free(backend_desc);
if ((opt_text && argc != 1) || (!opt_text && argc != 2))
{