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gtk-demo: Move the highlighting to a separate file

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Move all the logic related to asynchronous highlighting
to fontify.c, to keep main.c from becoming too cluttered.
This commit is contained in:
Matthias Clasen 2020-08-13 13:08:57 -04:00
parent aacb06dbee
commit 80cddd4cc1
4 changed files with 413 additions and 392 deletions
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405
demos/gtk-demo/fontify.c Normal file
View File

@ -0,0 +1,405 @@
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "config.h"
#include <gtk/gtk.h>
#include <glib/gstdio.h>
#include <gio/gunixoutputstream.h>
#include <fcntl.h>
/* This is the guts of gtk_text_buffer_insert_markup,
* copied here so we can make an incremental version.
*/
static void
insert_tags_for_attributes (GtkTextBuffer *buffer,
PangoAttrIterator *iter,
GtkTextIter *start,
GtkTextIter *end)
{
GtkTextTagTable *table;
PangoAttribute *attr;
GtkTextTag *tag;
char name[256];
table = gtk_text_buffer_get_tag_table (buffer);
#define STRING_ATTR(pango_attr_name, attr_name) \
attr = pango_attr_iterator_get (iter, pango_attr_name); \
if (attr) \
{ \
const char *string = ((PangoAttrString*)attr)->value; \
g_snprintf (name, 256, #attr_name "=%s", string); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, string, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define INT_ATTR(pango_attr_name, attr_name) \
attr = pango_attr_iterator_get (iter, pango_attr_name); \
if (attr) \
{ \
int value = ((PangoAttrInt*)attr)->value; \
g_snprintf (name, 256, #attr_name "=%d", value); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, value, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define FLOAT_ATTR(pango_attr_name, attr_name) \
attr = pango_attr_iterator_get (iter, pango_attr_name); \
if (attr) \
{ \
float value = ((PangoAttrFloat*)attr)->value; \
g_snprintf (name, 256, #attr_name "=%g", value); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, value, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define RGBA_ATTR(pango_attr_name, attr_name) \
attr = pango_attr_iterator_get (iter, pango_attr_name); \
if (attr) \
{ \
PangoColor *color; \
GdkRGBA rgba; \
color = &((PangoAttrColor*)attr)->color; \
rgba.red = color->red / 65535.; \
rgba.green = color->green / 65535.; \
rgba.blue = color->blue / 65535.; \
rgba.alpha = 1.; \
char *str = gdk_rgba_to_string (&rgba); \
g_snprintf (name, 256, #attr_name "=%s", str); \
g_free (str); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, &rgba, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
attr = pango_attr_iterator_get (iter, PANGO_ATTR_LANGUAGE);
if (attr)
{
const char *language = pango_language_to_string (((PangoAttrLanguage*)attr)->value);
g_snprintf (name, 256, "language=%s", language);
tag = gtk_text_tag_table_lookup (table, name);
if (!tag)
{
tag = gtk_text_tag_new (name);
g_object_set (tag, "language", language, NULL);
gtk_text_tag_table_add (table, tag);
g_object_unref (tag);
}
gtk_text_buffer_apply_tag (buffer, tag, start, end);
}
STRING_ATTR (PANGO_ATTR_FAMILY, family)
INT_ATTR (PANGO_ATTR_STYLE, style)
INT_ATTR (PANGO_ATTR_WEIGHT, weight)
INT_ATTR (PANGO_ATTR_VARIANT, variant)
INT_ATTR (PANGO_ATTR_STRETCH, stretch)
INT_ATTR (PANGO_ATTR_SIZE, size)
attr = pango_attr_iterator_get (iter, PANGO_ATTR_FONT_DESC);
if (attr)
{
PangoFontDescription *desc = ((PangoAttrFontDesc*)attr)->desc;
char *str = pango_font_description_to_string (desc);
g_snprintf (name, 256, "font-desc=%s", str);
g_free (str);
tag = gtk_text_tag_table_lookup (table, name);
if (!tag)
{
tag = gtk_text_tag_new (name);
g_object_set (tag, "font-desc", desc, NULL);
gtk_text_tag_table_add (table, tag);
g_object_unref (tag);
}
gtk_text_buffer_apply_tag (buffer, tag, start, end);
}
RGBA_ATTR (PANGO_ATTR_FOREGROUND, foreground_rgba)
RGBA_ATTR (PANGO_ATTR_BACKGROUND, background_rgba)
INT_ATTR (PANGO_ATTR_UNDERLINE, underline)
RGBA_ATTR (PANGO_ATTR_UNDERLINE_COLOR, underline_rgba)
INT_ATTR (PANGO_ATTR_OVERLINE, overline)
RGBA_ATTR (PANGO_ATTR_OVERLINE_COLOR, overline_rgba)
INT_ATTR (PANGO_ATTR_STRIKETHROUGH, strikethrough)
RGBA_ATTR (PANGO_ATTR_STRIKETHROUGH_COLOR, strikethrough_rgba)
INT_ATTR (PANGO_ATTR_RISE, rise)
FLOAT_ATTR (PANGO_ATTR_SCALE, scale)
INT_ATTR (PANGO_ATTR_FALLBACK, fallback)
INT_ATTR (PANGO_ATTR_LETTER_SPACING, letter_spacing)
STRING_ATTR (PANGO_ATTR_FONT_FEATURES, font_features)
INT_ATTR (PANGO_ATTR_ALLOW_BREAKS, allow_breaks)
INT_ATTR (PANGO_ATTR_SHOW, show_spaces)
INT_ATTR (PANGO_ATTR_INSERT_HYPHENS, insert_hyphens)
}
typedef struct
{
GtkTextBuffer *buffer;
GtkTextIter iter;
GtkTextMark *mark;
PangoAttrList *attributes;
char *text;
PangoAttrIterator *attr;
} MarkupData;
static void
free_markup_data (MarkupData *mdata)
{
gtk_text_buffer_delete_mark (mdata->buffer, mdata->mark);
pango_attr_iterator_destroy (mdata->attr);
pango_attr_list_unref (mdata->attributes);
g_free (mdata->text);
g_object_unref (mdata->buffer);
g_free (mdata);
}
static gboolean
insert_markup_idle (gpointer data)
{
MarkupData *mdata = data;
gint64 begin;
begin = g_get_monotonic_time ();
do
{
int start, end;
int start_offset;
GtkTextIter start_iter;
if (g_get_monotonic_time () - begin > G_TIME_SPAN_MILLISECOND)
{
g_idle_add (insert_markup_idle, data);
return G_SOURCE_REMOVE;
}
pango_attr_iterator_range (mdata->attr, &start, &end);
if (end == G_MAXINT) /* last chunk */
end = start - 1; /* resulting in -1 to be passed to _insert */
start_offset = gtk_text_iter_get_offset (&mdata->iter);
gtk_text_buffer_insert (mdata->buffer, &mdata->iter, mdata->text + start, end - start);
gtk_text_buffer_get_iter_at_offset (mdata->buffer, &start_iter, start_offset);
insert_tags_for_attributes (mdata->buffer, mdata->attr, &start_iter, &mdata->iter);
gtk_text_buffer_get_iter_at_mark (mdata->buffer, &mdata->iter, mdata->mark);
}
while (pango_attr_iterator_next (mdata->attr));
free_markup_data (mdata);
return G_SOURCE_REMOVE;
}
static void
insert_markup (GtkTextBuffer *buffer,
GtkTextIter *iter,
const char *markup,
int len)
{
char *text;
PangoAttrList *attributes;
GError *error = NULL;
MarkupData *data;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
if (!pango_parse_markup (markup, len, 0, &attributes, &text, NULL, &error))
{
g_warning ("Invalid markup string: %s", error->message);
g_error_free (error);
return;
}
if (!attributes)
{
gtk_text_buffer_insert (buffer, iter, text, -1);
g_free (text);
return;
}
data = g_new (MarkupData, 1);
data->buffer = g_object_ref (buffer);
data->iter = *iter;
data->attributes = attributes;
data->text = text;
/* create mark with right gravity */
data->mark = gtk_text_buffer_create_mark (buffer, NULL, iter, FALSE);
data->attr = pango_attr_list_get_iterator (attributes);
insert_markup_idle (data);
}
static void
fontify_finish (GObject *source,
GAsyncResult *result,
gpointer data)
{
GSubprocess *subprocess = G_SUBPROCESS (source);
GtkTextBuffer *buffer = data;
GBytes *stdout_buf = NULL;
GBytes *stderr_buf = NULL;
GError *error = NULL;
if (!g_subprocess_communicate_finish (subprocess,
result,
&stdout_buf,
&stderr_buf,
&error))
{
g_clear_pointer (&stdout_buf, g_bytes_unref);
g_clear_pointer (&stderr_buf, g_bytes_unref);
g_warning ("%s", error->message);
g_clear_error (&error);
g_object_unref (subprocess);
g_object_unref (buffer);
return;
}
if (g_subprocess_get_exit_status (subprocess) != 0)
{
if (stderr_buf)
g_warning ("%s", (char *)g_bytes_get_data (stderr_buf, NULL));
g_clear_pointer (&stderr_buf, g_bytes_unref);
}
g_object_unref (subprocess);
g_clear_pointer (&stderr_buf, g_bytes_unref);
if (stdout_buf)
{
char *markup;
gsize len;
char *p;
GtkTextIter start;
gtk_text_buffer_set_text (buffer, "", 0);
/* highlight puts a span with font and size around its output,
* which we don't want.
*/
markup = g_bytes_unref_to_data (stdout_buf, &len);
for (p = markup + strlen ("<span "); *p != '>'; p++) *p = ' ';
gtk_text_buffer_get_start_iter (buffer, &start);
insert_markup (buffer, &start, markup, len);
}
g_object_unref (buffer);
}
void
fontify (const char *format,
GtkTextBuffer *source_buffer)
{
GSubprocess *subprocess;
char *format_arg;
GtkSettings *settings;
char *theme;
gboolean prefer_dark;
const char *style_arg;
const char *text;
GtkTextIter start, end;
GBytes *bytes;
GError *error = NULL;
settings = gtk_settings_get_default ();
g_object_get (settings,
"gtk-theme-name", &theme,
"gtk-application-prefer-dark-theme", &prefer_dark,
NULL);
if (prefer_dark || strcmp (theme, "HighContrastInverse") == 0)
style_arg = "--style=edit-vim-dark";
else
style_arg = "--style=edit-kwrite";
g_free (theme);
format_arg = g_strconcat ("--syntax=", format, NULL);
subprocess = g_subprocess_new (G_SUBPROCESS_FLAGS_STDIN_PIPE |
G_SUBPROCESS_FLAGS_STDOUT_PIPE |
G_SUBPROCESS_FLAGS_STDERR_PIPE,
&error,
"highlight",
format_arg,
"--out-format=pango",
style_arg,
NULL);
g_free (format_arg);
if (!subprocess)
{
if (g_error_matches (error, G_SPAWN_ERROR, G_SPAWN_ERROR_NOENT))
{
static gboolean warned = FALSE;
if (!warned)
{
warned = TRUE;
g_message ("For syntax highlighting, install the “highlight” program");
}
}
else
g_warning ("%s", error->message);
g_clear_error (&error);
return;
}
gtk_text_buffer_get_bounds (source_buffer, &start, &end);
text = gtk_text_buffer_get_text (source_buffer, &start, &end, TRUE);
bytes = g_bytes_new_static (text, strlen (text));
/* Work around https://gitlab.gnome.org/GNOME/glib/-/issues/2182 */
if (G_IS_UNIX_OUTPUT_STREAM (g_subprocess_get_stdin_pipe (subprocess)))
{
GOutputStream *stdin_pipe = g_subprocess_get_stdin_pipe (subprocess);
int fd = g_unix_output_stream_get_fd (G_UNIX_OUTPUT_STREAM (stdin_pipe));
fcntl (fd, F_SETFL, O_NONBLOCK);
}
g_subprocess_communicate_async (subprocess,
bytes,
NULL,
fontify_finish,
g_object_ref (source_buffer));
}

6
demos/gtk-demo/fontify.h Normal file
View File

@ -0,0 +1,6 @@
#pragma once
#include <gtk/gtk.h>
void fontify (const char *format,
GtkTextBuffer *buffer);

393
demos/gtk-demo/main.c
View File

@ -8,10 +8,8 @@
#include <gtk/gtk.h>
#include <glib/gstdio.h>
#include <gio/gunixoutputstream.h>
#include <fcntl.h>
#include "demos.h"
#include "fontify.h"
static GtkWidget *info_view;
static GtkWidget *source_view;
@ -237,395 +235,6 @@ activate_run (GSimpleAction *action,
gtk_demo_run (demo, window);
}
static void
insert_tags_for_attributes (GtkTextBuffer *buffer,
PangoAttrIterator *iter,
GtkTextIter *start,
GtkTextIter *end)
{
GtkTextTagTable *table;
PangoAttribute *attr;
GtkTextTag *tag;
char name[256];
table = gtk_text_buffer_get_tag_table (buffer);
#define STRING_ATTR(pango_attr_name, attr_name) \
attr = pango_attr_iterator_get (iter, pango_attr_name); \
if (attr) \
{ \
const char *string = ((PangoAttrString*)attr)->value; \
g_snprintf (name, 256, #attr_name "=%s", string); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, string, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define INT_ATTR(pango_attr_name, attr_name) \
attr = pango_attr_iterator_get (iter, pango_attr_name); \
if (attr) \
{ \
int value = ((PangoAttrInt*)attr)->value; \
g_snprintf (name, 256, #attr_name "=%d", value); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, value, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define FLOAT_ATTR(pango_attr_name, attr_name) \
attr = pango_attr_iterator_get (iter, pango_attr_name); \
if (attr) \
{ \
float value = ((PangoAttrFloat*)attr)->value; \
g_snprintf (name, 256, #attr_name "=%g", value); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, value, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define RGBA_ATTR(pango_attr_name, attr_name) \
attr = pango_attr_iterator_get (iter, pango_attr_name); \
if (attr) \
{ \
PangoColor *color; \
GdkRGBA rgba; \
color = &((PangoAttrColor*)attr)->color; \
rgba.red = color->red / 65535.; \
rgba.green = color->green / 65535.; \
rgba.blue = color->blue / 65535.; \
rgba.alpha = 1.; \
char *str = gdk_rgba_to_string (&rgba); \
g_snprintf (name, 256, #attr_name "=%s", str); \
g_free (str); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, &rgba, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
attr = pango_attr_iterator_get (iter, PANGO_ATTR_LANGUAGE);
if (attr)
{
const char *language = pango_language_to_string (((PangoAttrLanguage*)attr)->value);
g_snprintf (name, 256, "language=%s", language);
tag = gtk_text_tag_table_lookup (table, name);
if (!tag)
{
tag = gtk_text_tag_new (name);
g_object_set (tag, "language", language, NULL);
gtk_text_tag_table_add (table, tag);
g_object_unref (tag);
}
gtk_text_buffer_apply_tag (buffer, tag, start, end);
}
STRING_ATTR (PANGO_ATTR_FAMILY, family)
INT_ATTR (PANGO_ATTR_STYLE, style)
INT_ATTR (PANGO_ATTR_WEIGHT, weight)
INT_ATTR (PANGO_ATTR_VARIANT, variant)
INT_ATTR (PANGO_ATTR_STRETCH, stretch)
INT_ATTR (PANGO_ATTR_SIZE, size)
attr = pango_attr_iterator_get (iter, PANGO_ATTR_FONT_DESC);
if (attr)
{
PangoFontDescription *desc = ((PangoAttrFontDesc*)attr)->desc;
char *str = pango_font_description_to_string (desc);
g_snprintf (name, 256, "font-desc=%s", str);
g_free (str);
tag = gtk_text_tag_table_lookup (table, name);
if (!tag)
{
tag = gtk_text_tag_new (name);
g_object_set (tag, "font-desc", desc, NULL);
gtk_text_tag_table_add (table, tag);
g_object_unref (tag);
}
gtk_text_buffer_apply_tag (buffer, tag, start, end);
}
RGBA_ATTR (PANGO_ATTR_FOREGROUND, foreground_rgba)
RGBA_ATTR (PANGO_ATTR_BACKGROUND, background_rgba)
INT_ATTR (PANGO_ATTR_UNDERLINE, underline)
RGBA_ATTR (PANGO_ATTR_UNDERLINE_COLOR, underline_rgba)
INT_ATTR (PANGO_ATTR_OVERLINE, overline)
RGBA_ATTR (PANGO_ATTR_OVERLINE_COLOR, overline_rgba)
INT_ATTR (PANGO_ATTR_STRIKETHROUGH, strikethrough)
RGBA_ATTR (PANGO_ATTR_STRIKETHROUGH_COLOR, strikethrough_rgba)
INT_ATTR (PANGO_ATTR_RISE, rise)
FLOAT_ATTR (PANGO_ATTR_SCALE, scale)
INT_ATTR (PANGO_ATTR_FALLBACK, fallback)
INT_ATTR (PANGO_ATTR_LETTER_SPACING, letter_spacing)
STRING_ATTR (PANGO_ATTR_FONT_FEATURES, font_features)
INT_ATTR (PANGO_ATTR_ALLOW_BREAKS, allow_breaks)
INT_ATTR (PANGO_ATTR_SHOW, show_spaces)
INT_ATTR (PANGO_ATTR_INSERT_HYPHENS, insert_hyphens)
}
typedef struct
{
GtkTextBuffer *buffer;
GtkTextIter iter;
GtkTextMark *mark;
PangoAttrList *attributes;
char *text;
PangoAttrIterator *attr;
} MarkupData;
static void
free_markup_data (MarkupData *mdata)
{
gtk_text_buffer_delete_mark (mdata->buffer, mdata->mark);
pango_attr_iterator_destroy (mdata->attr);
pango_attr_list_unref (mdata->attributes);
g_free (mdata->text);
g_object_unref (mdata->buffer);
g_free (mdata);
}
static gboolean
insert_markup_idle (gpointer data)
{
MarkupData *mdata = data;
gint64 begin;
begin = g_get_monotonic_time ();
do
{
int start, end;
int start_offset;
GtkTextIter start_iter;
if (g_get_monotonic_time () - begin > G_TIME_SPAN_MILLISECOND)
{
g_idle_add (insert_markup_idle, data);
return G_SOURCE_REMOVE;
}
pango_attr_iterator_range (mdata->attr, &start, &end);
if (end == G_MAXINT) /* last chunk */
end = start - 1; /* resulting in -1 to be passed to _insert */
start_offset = gtk_text_iter_get_offset (&mdata->iter);
gtk_text_buffer_insert (mdata->buffer, &mdata->iter, mdata->text + start, end - start);
gtk_text_buffer_get_iter_at_offset (mdata->buffer, &start_iter, start_offset);
insert_tags_for_attributes (mdata->buffer, mdata->attr, &start_iter, &mdata->iter);
gtk_text_buffer_get_iter_at_mark (mdata->buffer, &mdata->iter, mdata->mark);
}
while (pango_attr_iterator_next (mdata->attr));
free_markup_data (mdata);
return G_SOURCE_REMOVE;
}
static void
insert_markup (GtkTextBuffer *buffer,
GtkTextIter *iter,
const char *markup,
int len)
{
char *text;
PangoAttrList *attributes;
GError *error = NULL;
MarkupData *data;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
if (!pango_parse_markup (markup, len, 0, &attributes, &text, NULL, &error))
{
g_warning ("Invalid markup string: %s", error->message);
g_error_free (error);
return;
}
if (!attributes)
{
gtk_text_buffer_insert (buffer, iter, text, -1);
g_free (text);
return;
}
data = g_new (MarkupData, 1);
data->buffer = g_object_ref (buffer);
data->iter = *iter;
data->attributes = attributes;
data->text = text;
/* create mark with right gravity */
data->mark = gtk_text_buffer_create_mark (buffer, NULL, iter, FALSE);
data->attr = pango_attr_list_get_iterator (attributes);
insert_markup_idle (data);
}
static void
fontify_finish (GObject *source,
GAsyncResult *result,
gpointer data)
{
GSubprocess *subprocess = G_SUBPROCESS (source);
GtkTextBuffer *buffer = data;
GBytes *stdout_buf = NULL;
GBytes *stderr_buf = NULL;
GError *error = NULL;
if (!g_subprocess_communicate_finish (subprocess,
result,
&stdout_buf,
&stderr_buf,
&error))
{
g_clear_pointer (&stdout_buf, g_bytes_unref);
g_clear_pointer (&stderr_buf, g_bytes_unref);
g_warning ("%s", error->message);
g_clear_error (&error);
g_object_unref (subprocess);
g_object_unref (buffer);
return;
}
if (g_subprocess_get_exit_status (subprocess) != 0)
{
if (stderr_buf)
g_warning ("%s", (char *)g_bytes_get_data (stderr_buf, NULL));
g_clear_pointer (&stderr_buf, g_bytes_unref);
}
g_object_unref (subprocess);
g_clear_pointer (&stderr_buf, g_bytes_unref);
if (stdout_buf)
{
char *markup;
gsize len;
char *p;
GtkTextIter start;
gtk_text_buffer_set_text (buffer, "", 0);
/* highlight puts a span with font and size around its output,
* which we don't want.
*/
markup = g_bytes_unref_to_data (stdout_buf, &len);
for (p = markup + strlen ("<span "); *p != '>'; p++) *p = ' ';
gtk_text_buffer_get_start_iter (buffer, &start);
insert_markup (buffer, &start, markup, len);
}
g_object_unref (buffer);
}
void
fontify (const char *format,
GtkTextBuffer *source_buffer)
{
GSubprocess *subprocess;
char *format_arg;
GtkSettings *settings;
char *theme;
gboolean prefer_dark;
const char *style_arg;
const char *text;
GtkTextIter start, end;
GBytes *bytes;
GError *error = NULL;
settings = gtk_settings_get_default ();
g_object_get (settings,
"gtk-theme-name", &theme,
"gtk-application-prefer-dark-theme", &prefer_dark,
NULL);
if (prefer_dark || strcmp (theme, "HighContrastInverse") == 0)
style_arg = "--style=edit-vim-dark";
else
style_arg = "--style=edit-kwrite";
g_free (theme);
format_arg = g_strconcat ("--syntax=", format, NULL);
subprocess = g_subprocess_new (G_SUBPROCESS_FLAGS_STDIN_PIPE |
G_SUBPROCESS_FLAGS_STDOUT_PIPE |
G_SUBPROCESS_FLAGS_STDERR_PIPE,
&error,
"highlight",
format_arg,
"--out-format=pango",
style_arg,
NULL);
g_free (format_arg);
if (!subprocess)
{
if (g_error_matches (error, G_SPAWN_ERROR, G_SPAWN_ERROR_NOENT))
{
static gboolean warned = FALSE;
if (!warned)
{
warned = TRUE;
g_message ("For syntax highlighting, install the “highlight” program");
}
}
else
g_warning ("%s", error->message);
g_clear_error (&error);
return;
}
gtk_text_buffer_get_bounds (source_buffer, &start, &end);
text = gtk_text_buffer_get_text (source_buffer, &start, &end, TRUE);
bytes = g_bytes_new_static (text, strlen (text));
/* Work around https://gitlab.gnome.org/GNOME/glib/-/issues/2182 */
if (G_IS_UNIX_OUTPUT_STREAM (g_subprocess_get_stdin_pipe (subprocess)))
{
GOutputStream *stdin_pipe = g_subprocess_get_stdin_pipe (subprocess);
int fd = g_unix_output_stream_get_fd (G_UNIX_OUTPUT_STREAM (stdin_pipe));
fcntl (fd, F_SETFL, O_NONBLOCK);
}
g_subprocess_communicate_async (subprocess,
bytes,
NULL,
fontify_finish,
g_object_ref (source_buffer));
}
static GtkWidget *
display_image (const char *format,
const char *resource,

1
demos/gtk-demo/meson.build
View File

@ -93,6 +93,7 @@ demos = files([
gtkdemo_deps = [ libgtk_dep, ]
extra_demo_sources = files(['main.c',
'fontify.c',
'gtkfishbowl.c',
'fontplane.c',
'gtkgears.c',