forked from AuroraMiddleware/gtk
459 lines
13 KiB
C
459 lines
13 KiB
C
#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "config.h"
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#include <gtk/gtk.h>
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#include <glib/gstdio.h>
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#ifdef HAVE_GIO_UNIX
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#include <gio/gunixoutputstream.h>
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#include <fcntl.h>
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#endif
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/* This is the guts of gtk_text_buffer_insert_markup,
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* copied here so we can make an incremental version.
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*/
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static void
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insert_tags_for_attributes (GtkTextBuffer *buffer,
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PangoAttrIterator *iter,
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GtkTextIter *start,
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GtkTextIter *end)
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{
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GtkTextTagTable *table;
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PangoAttribute *attr;
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GtkTextTag *tag;
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char name[256];
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table = gtk_text_buffer_get_tag_table (buffer);
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#define STRING_ATTR(pango_attr_name, attr_name) \
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attr = pango_attr_iterator_get (iter, pango_attr_name); \
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if (attr) \
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{ \
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const char *string = ((PangoAttrString*)attr)->value; \
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g_snprintf (name, 256, #attr_name "=%s", string); \
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tag = gtk_text_tag_table_lookup (table, name); \
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if (!tag) \
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{ \
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tag = gtk_text_tag_new (name); \
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g_object_set (tag, #attr_name, string, NULL); \
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gtk_text_tag_table_add (table, tag); \
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g_object_unref (tag); \
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} \
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gtk_text_buffer_apply_tag (buffer, tag, start, end); \
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}
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#define INT_ATTR(pango_attr_name, attr_name) \
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attr = pango_attr_iterator_get (iter, pango_attr_name); \
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if (attr) \
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{ \
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int value = ((PangoAttrInt*)attr)->value; \
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g_snprintf (name, 256, #attr_name "=%d", value); \
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tag = gtk_text_tag_table_lookup (table, name); \
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if (!tag) \
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{ \
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tag = gtk_text_tag_new (name); \
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g_object_set (tag, #attr_name, value, NULL); \
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gtk_text_tag_table_add (table, tag); \
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g_object_unref (tag); \
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} \
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gtk_text_buffer_apply_tag (buffer, tag, start, end); \
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}
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#define FLOAT_ATTR(pango_attr_name, attr_name) \
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attr = pango_attr_iterator_get (iter, pango_attr_name); \
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if (attr) \
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{ \
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float value = ((PangoAttrFloat*)attr)->value; \
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g_snprintf (name, 256, #attr_name "=%g", value); \
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tag = gtk_text_tag_table_lookup (table, name); \
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if (!tag) \
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{ \
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tag = gtk_text_tag_new (name); \
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g_object_set (tag, #attr_name, value, NULL); \
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gtk_text_tag_table_add (table, tag); \
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g_object_unref (tag); \
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} \
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gtk_text_buffer_apply_tag (buffer, tag, start, end); \
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}
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#define RGBA_ATTR(pango_attr_name, attr_name) \
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attr = pango_attr_iterator_get (iter, pango_attr_name); \
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if (attr) \
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{ \
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PangoColor *color; \
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GdkRGBA rgba; \
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color = &((PangoAttrColor*)attr)->color; \
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rgba.red = color->red / 65535.; \
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rgba.green = color->green / 65535.; \
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rgba.blue = color->blue / 65535.; \
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rgba.alpha = 1.; \
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char *str = gdk_rgba_to_string (&rgba); \
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g_snprintf (name, 256, #attr_name "=%s", str); \
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g_free (str); \
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tag = gtk_text_tag_table_lookup (table, name); \
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if (!tag) \
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{ \
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tag = gtk_text_tag_new (name); \
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g_object_set (tag, #attr_name, &rgba, NULL); \
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gtk_text_tag_table_add (table, tag); \
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g_object_unref (tag); \
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} \
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gtk_text_buffer_apply_tag (buffer, tag, start, end); \
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}
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attr = pango_attr_iterator_get (iter, PANGO_ATTR_LANGUAGE);
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if (attr)
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{
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const char *language = pango_language_to_string (((PangoAttrLanguage*)attr)->value);
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g_snprintf (name, 256, "language=%s", language);
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tag = gtk_text_tag_table_lookup (table, name);
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if (!tag)
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{
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tag = gtk_text_tag_new (name);
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g_object_set (tag, "language", language, NULL);
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gtk_text_tag_table_add (table, tag);
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g_object_unref (tag);
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}
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gtk_text_buffer_apply_tag (buffer, tag, start, end);
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}
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STRING_ATTR (PANGO_ATTR_FAMILY, family)
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INT_ATTR (PANGO_ATTR_STYLE, style)
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INT_ATTR (PANGO_ATTR_WEIGHT, weight)
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INT_ATTR (PANGO_ATTR_VARIANT, variant)
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INT_ATTR (PANGO_ATTR_STRETCH, stretch)
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INT_ATTR (PANGO_ATTR_SIZE, size)
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attr = pango_attr_iterator_get (iter, PANGO_ATTR_FONT_DESC);
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if (attr)
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{
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PangoFontDescription *desc = ((PangoAttrFontDesc*)attr)->desc;
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char *str = pango_font_description_to_string (desc);
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g_snprintf (name, 256, "font-desc=%s", str);
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g_free (str);
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tag = gtk_text_tag_table_lookup (table, name);
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if (!tag)
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{
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tag = gtk_text_tag_new (name);
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g_object_set (tag, "font-desc", desc, NULL);
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gtk_text_tag_table_add (table, tag);
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g_object_unref (tag);
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}
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gtk_text_buffer_apply_tag (buffer, tag, start, end);
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}
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RGBA_ATTR (PANGO_ATTR_FOREGROUND, foreground_rgba)
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RGBA_ATTR (PANGO_ATTR_BACKGROUND, background_rgba)
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INT_ATTR (PANGO_ATTR_UNDERLINE, underline)
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RGBA_ATTR (PANGO_ATTR_UNDERLINE_COLOR, underline_rgba)
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INT_ATTR (PANGO_ATTR_OVERLINE, overline)
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RGBA_ATTR (PANGO_ATTR_OVERLINE_COLOR, overline_rgba)
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INT_ATTR (PANGO_ATTR_STRIKETHROUGH, strikethrough)
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RGBA_ATTR (PANGO_ATTR_STRIKETHROUGH_COLOR, strikethrough_rgba)
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INT_ATTR (PANGO_ATTR_RISE, rise)
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FLOAT_ATTR (PANGO_ATTR_SCALE, scale)
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INT_ATTR (PANGO_ATTR_FALLBACK, fallback)
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INT_ATTR (PANGO_ATTR_LETTER_SPACING, letter_spacing)
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STRING_ATTR (PANGO_ATTR_FONT_FEATURES, font_features)
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INT_ATTR (PANGO_ATTR_ALLOW_BREAKS, allow_breaks)
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INT_ATTR (PANGO_ATTR_SHOW, show_spaces)
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INT_ATTR (PANGO_ATTR_INSERT_HYPHENS, insert_hyphens)
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}
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typedef struct
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{
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GMarkupParseContext *parser;
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char *markup;
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gsize pos;
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gsize len;
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GtkTextBuffer *buffer;
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GtkTextIter iter;
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GtkTextMark *mark;
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PangoAttrList *attributes;
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char *text;
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PangoAttrIterator *attr;
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} MarkupData;
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static void
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free_markup_data (MarkupData *mdata)
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{
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g_free (mdata->markup);
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g_clear_pointer (&mdata->parser, g_markup_parse_context_free);
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gtk_text_buffer_delete_mark (mdata->buffer, mdata->mark);
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g_clear_pointer (&mdata->attr, pango_attr_iterator_destroy);
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g_clear_pointer (&mdata->attributes, pango_attr_list_unref);
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g_free (mdata->text);
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g_object_unref (mdata->buffer);
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g_free (mdata);
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}
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static gboolean
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insert_markup_idle (gpointer data)
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{
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MarkupData *mdata = data;
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gint64 begin;
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begin = g_get_monotonic_time ();
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do
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{
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int start, end;
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int start_offset;
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GtkTextIter start_iter;
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if (g_get_monotonic_time () - begin > G_TIME_SPAN_MILLISECOND)
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{
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g_idle_add (insert_markup_idle, data);
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return G_SOURCE_REMOVE;
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}
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pango_attr_iterator_range (mdata->attr, &start, &end);
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if (end == G_MAXINT) /* last chunk */
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end = start - 1; /* resulting in -1 to be passed to _insert */
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start_offset = gtk_text_iter_get_offset (&mdata->iter);
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gtk_text_buffer_insert (mdata->buffer, &mdata->iter, mdata->text + start, end - start);
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gtk_text_buffer_get_iter_at_offset (mdata->buffer, &start_iter, start_offset);
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insert_tags_for_attributes (mdata->buffer, mdata->attr, &start_iter, &mdata->iter);
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gtk_text_buffer_get_iter_at_mark (mdata->buffer, &mdata->iter, mdata->mark);
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}
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while (pango_attr_iterator_next (mdata->attr));
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free_markup_data (mdata);
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return G_SOURCE_REMOVE;
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}
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static gboolean
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parse_markup_idle (gpointer data)
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{
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MarkupData *mdata = data;
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gint64 begin;
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GError *error = NULL;
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begin = g_get_monotonic_time ();
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do {
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if (g_get_monotonic_time () - begin > G_TIME_SPAN_MILLISECOND)
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{
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g_idle_add (parse_markup_idle, data);
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return G_SOURCE_REMOVE;
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}
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if (!g_markup_parse_context_parse (mdata->parser,
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mdata->markup + mdata->pos,
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MIN (4096, mdata->len - mdata->pos),
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&error))
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{
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g_warning ("Invalid markup string: %s", error->message);
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g_error_free (error);
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free_markup_data (mdata);
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return G_SOURCE_REMOVE;
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}
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mdata->pos += 4096;
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} while (mdata->pos < mdata->len);
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if (!pango_markup_parser_finish (mdata->parser,
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&mdata->attributes,
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&mdata->text,
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NULL,
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&error))
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{
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g_warning ("Invalid markup string: %s", error->message);
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g_error_free (error);
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free_markup_data (mdata);
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return G_SOURCE_REMOVE;
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}
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if (!mdata->attributes)
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{
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gtk_text_buffer_insert (mdata->buffer, &mdata->iter, mdata->text, -1);
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free_markup_data (mdata);
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return G_SOURCE_REMOVE;
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}
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mdata->attr = pango_attr_list_get_iterator (mdata->attributes);
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insert_markup_idle (data);
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return G_SOURCE_REMOVE;
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}
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/* Takes a ref on @buffer while it is operating,
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* and consumes @markup.
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*/
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static void
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insert_markup (GtkTextBuffer *buffer,
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GtkTextIter *iter,
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char *markup,
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int len)
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{
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MarkupData *data;
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g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
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data = g_new0 (MarkupData, 1);
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data->buffer = g_object_ref (buffer);
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data->iter = *iter;
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data->markup = markup;
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data->len = len;
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data->parser = pango_markup_parser_new (0);
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data->pos = 0;
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/* create mark with right gravity */
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data->mark = gtk_text_buffer_create_mark (buffer, NULL, iter, FALSE);
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parse_markup_idle (data);
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}
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static void
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fontify_finish (GObject *source,
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GAsyncResult *result,
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gpointer data)
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{
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GSubprocess *subprocess = G_SUBPROCESS (source);
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GtkTextBuffer *buffer = data;
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GBytes *stdout_buf = NULL;
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GBytes *stderr_buf = NULL;
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GError *error = NULL;
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if (!g_subprocess_communicate_finish (subprocess,
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result,
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&stdout_buf,
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&stderr_buf,
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&error))
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{
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g_clear_pointer (&stdout_buf, g_bytes_unref);
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g_clear_pointer (&stderr_buf, g_bytes_unref);
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g_warning ("%s", error->message);
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g_clear_error (&error);
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g_object_unref (subprocess);
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g_object_unref (buffer);
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return;
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}
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if (g_subprocess_get_exit_status (subprocess) != 0)
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{
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if (stderr_buf)
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g_warning ("%s", (char *)g_bytes_get_data (stderr_buf, NULL));
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g_clear_pointer (&stderr_buf, g_bytes_unref);
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}
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g_object_unref (subprocess);
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g_clear_pointer (&stderr_buf, g_bytes_unref);
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if (stdout_buf)
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{
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char *markup;
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gsize len;
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char *p;
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GtkTextIter start;
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gtk_text_buffer_set_text (buffer, "", 0);
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/* highlight puts a span with font and size around its output,
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* which we don't want.
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*/
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markup = g_bytes_unref_to_data (stdout_buf, &len);
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for (p = markup + strlen ("<span "); *p != '>'; p++) *p = ' ';
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gtk_text_buffer_get_start_iter (buffer, &start);
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insert_markup (buffer, &start, markup, len);
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}
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g_object_unref (buffer);
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}
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void
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fontify (const char *format,
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GtkTextBuffer *source_buffer)
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{
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GSubprocess *subprocess;
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char *format_arg;
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GtkSettings *settings;
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char *theme;
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gboolean prefer_dark;
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const char *style_arg;
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const char *text;
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GtkTextIter start, end;
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GBytes *bytes;
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GError *error = NULL;
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settings = gtk_settings_get_default ();
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g_object_get (settings,
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"gtk-theme-name", &theme,
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"gtk-application-prefer-dark-theme", &prefer_dark,
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NULL);
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if (prefer_dark || strcmp (theme, "HighContrastInverse") == 0)
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style_arg = "--style=edit-vim-dark";
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else
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style_arg = "--style=edit-kwrite";
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g_free (theme);
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format_arg = g_strconcat ("--syntax=", format, NULL);
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subprocess = g_subprocess_new (G_SUBPROCESS_FLAGS_STDIN_PIPE |
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G_SUBPROCESS_FLAGS_STDOUT_PIPE |
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G_SUBPROCESS_FLAGS_STDERR_PIPE,
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&error,
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"highlight",
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format_arg,
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"--out-format=pango",
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style_arg,
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NULL);
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g_free (format_arg);
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if (!subprocess)
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{
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if (g_error_matches (error, G_SPAWN_ERROR, G_SPAWN_ERROR_NOENT))
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{
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static gboolean warned = FALSE;
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if (!warned)
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{
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warned = TRUE;
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g_message ("For syntax highlighting, install the “highlight” program");
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}
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}
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else
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g_warning ("%s", error->message);
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g_clear_error (&error);
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return;
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}
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gtk_text_buffer_get_bounds (source_buffer, &start, &end);
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text = gtk_text_buffer_get_text (source_buffer, &start, &end, TRUE);
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bytes = g_bytes_new_static (text, strlen (text));
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#ifdef HAVE_GIO_UNIX
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/* Work around https://gitlab.gnome.org/GNOME/glib/-/issues/2182 */
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if (G_IS_UNIX_OUTPUT_STREAM (g_subprocess_get_stdin_pipe (subprocess)))
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{
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GOutputStream *stdin_pipe = g_subprocess_get_stdin_pipe (subprocess);
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int fd = g_unix_output_stream_get_fd (G_UNIX_OUTPUT_STREAM (stdin_pipe));
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fcntl (fd, F_SETFL, O_NONBLOCK);
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}
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#endif
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g_subprocess_communicate_async (subprocess,
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bytes,
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NULL,
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fontify_finish,
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g_object_ref (source_buffer));
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}
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