mirror of
https://gitlab.gnome.org/GNOME/gtk.git
synced 2024-12-30 15:31:34 +00:00
393 lines
8.7 KiB
C
393 lines
8.7 KiB
C
#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <gtk/gtk.h>
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#include <demos.h>
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static GtkTextBuffer *info_buffer;
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static GtkTextBuffer *source_buffer;
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static gchar *current_file = NULL;
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enum {
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TITLE_COLUMN,
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FILENAME_COLUMN,
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FUNC_COLUMN,
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ITALIC_COLUMN,
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NUM_COLUMNS
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};
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gboolean
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read_line (FILE *stream, GString *str)
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{
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int n_read = 0;
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flockfile (stream);
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g_string_truncate (str, 0);
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while (1)
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{
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int c;
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c = getc_unlocked (stream);
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if (c == EOF)
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goto done;
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else
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n_read++;
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switch (c)
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{
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case '\r':
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case '\n':
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{
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int next_c = getc_unlocked (stream);
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if (!(next_c == EOF ||
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(c == '\r' && next_c == '\n') ||
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(c == '\n' && next_c == '\r')))
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ungetc (next_c, stream);
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goto done;
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}
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default:
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g_string_append_c (str, c);
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}
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}
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done:
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funlockfile (stream);
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return n_read > 0;
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}
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void
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load_file (const gchar *filename)
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{
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FILE *file;
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GtkTextIter start, end;
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GString *buffer = g_string_new (NULL);
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int state = 0;
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gboolean in_para = 0;
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if (current_file && !strcmp (current_file, filename))
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return;
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g_free (current_file);
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current_file = g_strdup (filename);
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gtk_text_buffer_get_bounds (info_buffer, &start, &end);
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gtk_text_buffer_delete (info_buffer, &start, &end);
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gtk_text_buffer_get_bounds (source_buffer, &start, &end);
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gtk_text_buffer_delete (source_buffer, &start, &end);
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file = fopen (filename, "r");
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if (!file)
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{
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g_warning ("Cannot open %s: %s\n", filename, g_strerror (errno));
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return;
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}
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gtk_text_buffer_get_iter_at_offset (info_buffer, &start, 0);
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while (read_line (file, buffer))
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{
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gchar *p = buffer->str;
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gchar *q;
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switch (state)
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{
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case 0:
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/* Reading title */
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while (*p == '/' || *p == '*' || isspace (*p))
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p++;
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q = p + strlen (p);
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while (q > p && isspace (*(q - 1)))
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q--;
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if (q > p)
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{
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int len_chars = g_utf8_pointer_to_offset (p, q);
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end = start;
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g_assert (strlen (p) >= q - p);
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gtk_text_buffer_insert (info_buffer, &end, p, q - p);
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start = end;
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gtk_text_iter_backward_chars (&start, len_chars);
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gtk_text_buffer_apply_tag_by_name (info_buffer, "title", &start, &end);
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start = end;
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state++;
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}
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break;
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case 1:
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/* Reading body of info section */
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while (isspace (*p))
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p++;
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if (*p == '*' && *(p + 1) == '/')
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{
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gtk_text_buffer_get_iter_at_offset (source_buffer, &start, 0);
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state++;
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}
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else
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{
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int len;
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while (*p == '*' || isspace (*p))
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p++;
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len = strlen (p);
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while (isspace (*(p + len - 1)))
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len--;
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if (len > 0)
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{
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if (in_para)
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gtk_text_buffer_insert (info_buffer, &start, " ", 1);
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g_assert (strlen (p) >= len);
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gtk_text_buffer_insert (info_buffer, &start, p, len);
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in_para = 1;
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}
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else
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{
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gtk_text_buffer_insert (info_buffer, &start, "\n", 1);
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in_para = 0;
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}
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}
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break;
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case 2:
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/* Skipping blank lines */
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while (isspace (*p))
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p++;
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if (*p)
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{
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p = buffer->str;
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state++;
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/* Fall through */
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}
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else
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break;
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case 3:
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/* Reading program body */
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gtk_text_buffer_insert (source_buffer, &start, p, -1);
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gtk_text_buffer_insert (info_buffer, &start, "\n", 1);
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break;
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}
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}
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gtk_text_buffer_get_bounds (source_buffer, &start, &end);
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gtk_text_buffer_apply_tag_by_name (info_buffer, "source", &start, &end);
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fclose (file);
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}
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gboolean
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button_press_event_cb (GtkTreeView *tree_view,
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GdkEventButton *event,
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GtkTreeModel *model)
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{
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if (event->type == GDK_2BUTTON_PRESS)
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{
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GtkTreePath *path = NULL;
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gtk_tree_view_get_path_at_pos (tree_view,
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event->window,
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event->x,
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event->y,
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&path,
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NULL);
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if (path)
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{
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GtkTreeIter iter;
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gboolean italic;
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GVoidFunc func;
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gtk_tree_model_get_iter (model, &iter, path);
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gtk_tree_store_get (GTK_TREE_STORE (model),
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&iter,
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FUNC_COLUMN, &func,
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ITALIC_COLUMN, &italic,
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-1);
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(func) ();
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gtk_tree_store_set (GTK_TREE_STORE (model),
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&iter,
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ITALIC_COLUMN, !italic,
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-1);
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gtk_tree_path_free (path);
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}
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g_signal_stop_emission_by_name (tree_view, "button-press-event");
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return TRUE;
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}
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return FALSE;
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}
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static void
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selection_cb (GtkTreeSelection *selection,
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GtkTreeModel *model)
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{
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GtkTreeIter iter;
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GValue value = {0, };
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if (! gtk_tree_selection_get_selected (selection, NULL, &iter))
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return;
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gtk_tree_model_get_value (model, &iter,
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FILENAME_COLUMN,
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&value);
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load_file (g_value_get_string (&value));
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g_value_unset (&value);
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}
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static GtkWidget *
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create_text (GtkTextBuffer **buffer,
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gboolean is_source)
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{
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GtkWidget *scrolled_window;
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GtkWidget *text_view;
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PangoFontDescription *font_desc;
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scrolled_window = gtk_scrolled_window_new (NULL, NULL);
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gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
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GTK_POLICY_AUTOMATIC,
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GTK_POLICY_AUTOMATIC);
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gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolled_window),
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GTK_SHADOW_IN);
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text_view = gtk_text_view_new ();
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gtk_container_add (GTK_CONTAINER (scrolled_window), text_view);
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*buffer = gtk_text_buffer_new (NULL);
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gtk_text_view_set_buffer (GTK_TEXT_VIEW (text_view), *buffer);
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gtk_text_view_set_editable (GTK_TEXT_VIEW (text_view), FALSE);
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gtk_text_view_set_cursor_visible (GTK_TEXT_VIEW (text_view), FALSE);
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if (is_source)
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{
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font_desc = pango_font_description_from_string ("Courier 10");
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gtk_widget_modify_font (text_view, font_desc);
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pango_font_description_free (font_desc);
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}
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gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (text_view), !is_source);
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return scrolled_window;
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}
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/* Technically a list, but if we do go to 80 demos, we may want to move to a tree */
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static GtkWidget *
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create_tree (void)
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{
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GtkTreeSelection *selection;
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GtkCellRenderer *cell;
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GtkWidget *tree_view;
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GtkTreeViewColumn *column;
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GtkTreeStore *model;
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GtkTreeIter iter;
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gint i;
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model = gtk_tree_store_new_with_types (NUM_COLUMNS, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_POINTER, G_TYPE_BOOLEAN);
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tree_view = gtk_tree_view_new_with_model (GTK_TREE_MODEL (model));
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selection = gtk_tree_view_get_selection (GTK_TREE_VIEW (tree_view));
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gtk_tree_selection_set_type (GTK_TREE_SELECTION (selection),
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GTK_TREE_SELECTION_SINGLE);
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gtk_widget_set_usize (tree_view, 200, -1);
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for (i=0; i < G_N_ELEMENTS (testgtk_demos); i++)
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{
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gtk_tree_store_append (GTK_TREE_STORE (model), &iter, NULL);
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gtk_tree_store_set (GTK_TREE_STORE (model),
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&iter,
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TITLE_COLUMN, testgtk_demos[i].title,
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FILENAME_COLUMN, testgtk_demos[i].filename,
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FUNC_COLUMN, testgtk_demos[i].func,
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ITALIC_COLUMN, FALSE,
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-1);
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}
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cell = gtk_cell_renderer_text_new ();
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column = gtk_tree_view_column_new_with_attributes ("Widget",
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cell,
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"text", TITLE_COLUMN,
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"italic", ITALIC_COLUMN,
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NULL);
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gtk_tree_view_append_column (GTK_TREE_VIEW (tree_view),
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GTK_TREE_VIEW_COLUMN (column));
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g_signal_connect (selection, "selection-changed", selection_cb, model);
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g_signal_connect (tree_view, "button-press-event", G_CALLBACK (button_press_event_cb), model);
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return tree_view;
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}
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int
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main (int argc, char **argv)
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{
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GtkWidget *window;
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GtkWidget *notebook;
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GtkWidget *hbox;
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GtkWidget *tree;
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GtkTextTag *tag;
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gtk_init (&argc, &argv);
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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g_signal_connect (window, "destroy",
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G_CALLBACK (gtk_main_quit), NULL);
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hbox = gtk_hbox_new (FALSE, 0);
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gtk_container_add (GTK_CONTAINER (window), hbox);
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tree = create_tree ();
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gtk_box_pack_start (GTK_BOX (hbox), tree, FALSE, FALSE, 0);
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notebook = gtk_notebook_new ();
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gtk_box_pack_start (GTK_BOX (hbox), notebook, TRUE, TRUE, 0);
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gtk_notebook_append_page (GTK_NOTEBOOK (notebook),
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create_text (&info_buffer, FALSE),
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gtk_label_new ("Info"));
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gtk_notebook_append_page (GTK_NOTEBOOK (notebook),
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create_text (&source_buffer, TRUE),
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gtk_label_new ("Source"));
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tag = gtk_text_buffer_create_tag (info_buffer, "title");
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gtk_object_set (GTK_OBJECT (tag),
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"font", "Sans 18",
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NULL);
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tag = gtk_text_buffer_create_tag (info_buffer, "source");
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gtk_object_set (GTK_OBJECT (tag),
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"font", "Courier 10",
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"pixels_above_lines", 0,
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"pixels_below_lines", 0,
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NULL);
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gtk_window_set_default_size (GTK_WINDOW (window), 600, 400);
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gtk_widget_show_all (window);
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load_file (testgtk_demos[0].filename);
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gtk_main ();
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return 0;
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}
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