+/*
+ * This file is part of DisOrder
+ * Copyright (C) 2007 Richard Kettlewell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include "disobedience.h"
+#include "table.h"
+#include "html.h"
+#include "manual.h"
+
+VECTOR_TYPE(markstack, GtkTextMark *, xrealloc);
+
+/** @brief Known tag type */
+struct tag {
+ /** @brief HTML tag name */
+ const char *name;
+
+ /** @brief Called to set up the tag */
+ void (*init)(GtkTextTag *tag);
+
+ /** @brief GTK+ tag object */
+ GtkTextTag *tag;
+};
+
+static void init_bold(GtkTextTag *tag) {
+ g_object_set(G_OBJECT(tag), "weight", PANGO_WEIGHT_BOLD, (char *)0);
+}
+
+static void init_italic(GtkTextTag *tag) {
+ g_object_set(G_OBJECT(tag), "style", PANGO_STYLE_ITALIC, (char *)0);
+}
+
+/** @brief Table of known tags
+ *
+ * Keep in alphabetical order
+ */
+static struct tag tags[] = {
+ { "b", init_bold, 0 },
+ { "i", init_italic, 0 }
+};
+
+/** @brief Number of known tags */
+#define NTAGS (sizeof tags / sizeof *tags)
+
+/** @brief State structure for insert_html() */
+struct state {
+ /** @brief The buffer to insert into */
+ GtkTextBuffer *buffer;
+
+ /** @brief True if we are inside <body> */
+ int body;
+
+ /** @brief Stack of marks corresponding to tags */
+ struct markstack marks[1];
+
+};
+
+/** @brief Called for an open tag */
+static void html_open(const char *tag,
+ hash attribute((unused)) *attrs,
+ void *u) {
+ struct state *const s = u;
+ GtkTextIter iter[1];
+
+ if(!strcmp(tag, "body"))
+ s->body = 1;
+ if(!s->body)
+ return;
+ /* push a mark for the start of the region */
+ gtk_text_buffer_get_iter_at_mark(s->buffer, iter,
+ gtk_text_buffer_get_insert(s->buffer));
+ markstack_append(s->marks,
+ gtk_text_buffer_create_mark(s->buffer,
+ 0/* mark_name */,
+ iter,
+ TRUE/*left_gravity*/));
+}
+
+/** @brief Called for a close tag */
+static void html_close(const char *tag,
+ void *u) {
+ struct state *const s = u;
+ GtkTextIter start[1], end[1];
+ int n;
+
+ if(!strcmp(tag, "body"))
+ s->body = 0;
+ if(!s->body)
+ return;
+ /* see if this is a known tag */
+ if((n = TABLE_FIND(tags, struct tag, name, tag)) < 0)
+ return;
+ /* pop the mark at the start of the region */
+ assert(s->marks->nvec > 0);
+ gtk_text_buffer_get_iter_at_mark(s->buffer, start,
+ s->marks->vec[--s->marks->nvec]);
+ gtk_text_buffer_get_iter_at_mark(s->buffer, end,
+ gtk_text_buffer_get_insert(s->buffer));
+ /* apply a tag */
+ gtk_text_buffer_apply_tag(s->buffer, tags[n].tag, start, end);
+ /* don't need the start mark any more */
+ gtk_text_buffer_delete_mark(s->buffer, s->marks->vec[s->marks->nvec]);
+}
+
+/** @brief Called for text */
+static void html_text(const char *text,
+ void *u) {
+ struct state *const s = u;
+
+ /* ignore header */
+ if(!s->body)
+ return;
+ gtk_text_buffer_insert_at_cursor(s->buffer, text, strlen(text));
+}
+
+/** @brief Callbacks for insert_html() */
+static const struct html_parser_callbacks insert_html_callbacks = {
+ html_open,
+ html_close,
+ html_text
+};
+
+/** @brief Insert @p html into @p buffer at cursor */
+static void insert_html(GtkTextBuffer *buffer,
+ const char *html) {
+ struct state s[1];
+ size_t n;
+ GtkTextTagTable *tagtable;
+
+ memset(s, 0, sizeof *s);
+ s->buffer = buffer;
+ markstack_init(s->marks);
+ /* initialize tags */
+ if(!tags[0].tag)
+ for(n = 0; n < NTAGS; ++n)
+ tags[n].init(tags[n].tag = gtk_text_tag_new(0));
+ /* add tags to this buffer */
+ tagtable = gtk_text_buffer_get_tag_table(s->buffer);
+ for(n = 0; n < NTAGS; ++n)
+ gtk_text_tag_table_add(tagtable, tags[n].tag);
+ /* convert the input */
+ html_parse(&insert_html_callbacks, html, s);
+}
+
+static GtkTextBuffer *html_buffer(const char *html) {
+ GtkTextBuffer *buffer = gtk_text_buffer_new(NULL);
+
+ insert_html(buffer, html);
+ return buffer;
+}
+
+static GtkWidget *help_window;
+
+void popup_help(void) {
+ GtkWidget *view;
+
+ if(help_window) {
+ gtk_window_present(GTK_WINDOW(help_window));
+ return;
+ }
+ help_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+ g_signal_connect(help_window, "destroy",
+ G_CALLBACK(gtk_widget_destroyed), &help_window);
+ gtk_window_set_title(GTK_WINDOW(help_window), "Disobedience Manual");
+ view = gtk_text_view_new_with_buffer(html_buffer(manual));
+ gtk_container_add(GTK_CONTAINER(help_window),
+ scroll_widget(view,
+ "help"));
+ gtk_widget_show_all(help_window);
+}
+
+/*
+Local Variables:
+c-basic-offset:2
+comment-column:40
+fill-column:79
+indent-tabs-mode:nil
+End:
+*/
~mdw / disorder / commitdiff