forked from AuroraMiddleware/gtk
gtk-demo: Modernize source highlighting
Drop the homegrown highlighting code, and just use highlight to produce Pango markup. When using an external highlighter, we can also highlight css, xml, headers, at least.
This commit is contained in:
Matthias Clasen
parent
41ef2c5f34
commit
05255bfc90
@ -234,373 +234,106 @@ activate_run (GSimpleAction *action,
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gtk_demo_run (demo, window);
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}
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/* Stupid syntax highlighting.
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*
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* No regex was used in the making of this highlighting.
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* It should only work for simple cases. This is good, as
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* that's all we should have in the demos.
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*/
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/* This code should not be used elsewhere, except perhaps as an example of how
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* to iterate through a text buffer.
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*/
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enum {
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STATE_NORMAL,
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STATE_IN_COMMENT
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};
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static const char *tokens[] =
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static GBytes *
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fontify_text (const char *format,
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const char *text)
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{
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"/*",
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"\"",
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NULL
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};
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GSubprocess *subprocess;
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static gboolean warned = FALSE;
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GBytes *stdin_buf;
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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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char *format_arg;
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static const char *types[] =
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{
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"static",
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"const ",
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"void",
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" int ",
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" char ",
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"char ",
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"float",
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"double",
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"gint8",
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"gint16",
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"gint32",
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"guint",
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"guint8",
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"guint16",
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"guint32",
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"guchar",
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"glong",
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"gboolean" ,
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"gshort",
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"gushort",
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"gulong",
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"gpointer",
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"NULL",
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"GList",
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"GSList",
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"FALSE",
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"TRUE",
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"FILE ",
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"GtkColorSelection ",
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"GtkWidget ",
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"GtkButton ",
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"GdkColor ",
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"GdkRectangle ",
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"GdkEventExpose ",
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"GdkGC ",
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"GdkPixbufLoader ",
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"GdkPixbuf ",
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"GError",
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"size_t",
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"GtkAboutDialog ",
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"GtkAction ",
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"GtkActionEntry ",
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"GtkRadioActionEntry ",
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"GtkIconFactory ",
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"GtkTextBuffer ",
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"GtkStatusbar ",
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"GtkTextIter ",
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"GtkTextMark ",
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"GdkEventWindowState ",
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"GtkActionGroup ",
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"GtkUIManager ",
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"GtkRadioAction ",
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"GtkActionClass ",
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"GtkToggleActionEntry ",
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"GtkAssistant ",
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"GtkBuilder ",
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"GtkSizeGroup ",
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"GtkTreeModel ",
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"GtkTreeSelection ",
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"GdkDisplay ",
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"GdkScreen ",
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"GdkSurface ",
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"GdkEventButton ",
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"GdkCursor ",
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"GtkTreeIter ",
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"GtkTreeViewColumn ",
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"GdkDisplayManager ",
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"GdkClipboard ",
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"GtkIconSize ",
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"GtkImage ",
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"GdkDragContext ",
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"GtkSelectionData ",
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"GtkDialog ",
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"GtkMenuItem ",
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"GtkListStore ",
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"GtkCellLayout ",
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"GtkCellRenderer ",
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"GtkTreePath ",
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"GtkTreeStore ",
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"GtkEntry ",
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"GtkEditable ",
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"GtkEditableInterface ",
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"GdkPixmap ",
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"GdkEventConfigure ",
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"GdkEventMotion ",
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"GdkModifierType ",
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"GtkEntryCompletion ",
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"GtkToolItem ",
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"GDir ",
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"GtkIconView ",
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"GtkCellRendererText ",
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"GtkContainer ",
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"GtkPaned ",
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"GtkPrintOperation ",
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"GtkPrintContext ",
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"cairo_t ",
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"PangoLayout "
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"PangoFontDescription ",
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"PangoRenderer ",
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"PangoMatrix ",
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"PangoContext ",
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"PangoLayout ",
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"GtkToggleButton ",
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"GString ",
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"GtkIconSize ",
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"GtkTreeView ",
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"GtkTextTag ",
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"GdkEvent ",
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"GdkEventKey ",
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"GtkTextView ",
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"GdkBitmap ",
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"GtkTextChildAnchor ",
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"GArray ",
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"GtkCellEditable ",
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"GtkCellRendererToggle ",
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NULL
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};
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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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NULL);
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g_free (format_arg);
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static const char *control[] =
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{
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" if ",
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" while ",
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" else",
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" do ",
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" for ",
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"?",
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":",
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"return ",
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"goto ",
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NULL
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};
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void
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parse_chars (char *text,
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char **end_ptr,
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int *state,
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const char **tag,
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gboolean start)
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{
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int i;
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char *next_token;
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/* Handle comments first */
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if (*state == STATE_IN_COMMENT)
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if (!subprocess)
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{
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*end_ptr = strstr (text, "*/");
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if (*end_ptr)
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if (!warned)
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{
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*end_ptr += 2;
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*state = STATE_NORMAL;
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*tag = "comment";
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g_warning ("%s", error->message);
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warned = TRUE;
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}
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return;
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g_clear_error (&error);
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return NULL;
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}
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*tag = NULL;
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*end_ptr = NULL;
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stdin_buf = g_bytes_new_static (text, strlen (text));
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/* check for comment */
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if (!strncmp (text, "/*", 2))
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if (!g_subprocess_communicate (subprocess,
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stdin_buf,
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NULL,
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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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*end_ptr = strstr (text, "*/");
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if (*end_ptr)
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*end_ptr += 2;
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else
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*state = STATE_IN_COMMENT;
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*tag = "comment";
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return;
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g_clear_pointer (&stdin_buf, g_bytes_unref);
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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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return NULL;
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}
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/* check for preprocessor defines */
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if (*text == '#' && start)
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g_bytes_unref (stdin_buf);
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if (g_subprocess_get_exit_status (subprocess) != 0)
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{
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*end_ptr = NULL;
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*tag = "preprocessor";
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return;
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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 (&stdout_buf, g_bytes_unref);
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}
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/* functions */
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if (start && * text != '\t' && *text != ' ' && *text != '{' && *text != '}')
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{
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if (strstr (text, "("))
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{
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*end_ptr = strstr (text, "(");
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*tag = "function";
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return;
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}
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}
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/* check for types */
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for (i = 0; types[i] != NULL; i++)
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if (!strncmp (text, types[i], strlen (types[i])) ||
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(start && types[i][0] == ' ' && !strncmp (text, types[i] + 1, strlen (types[i]) - 1)))
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{
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*end_ptr = text + strlen (types[i]);
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*tag = "type";
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return;
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}
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g_clear_pointer (&stderr_buf, g_bytes_unref);
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/* check for control */
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for (i = 0; control[i] != NULL; i++)
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if (!strncmp (text, control[i], strlen (control[i])))
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{
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*end_ptr = text + strlen (control[i]);
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*tag = "control";
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return;
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}
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g_object_unref (subprocess);
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/* check for string */
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if (text[0] == '"')
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{
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int maybe_escape = FALSE;
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*end_ptr = text + 1;
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*tag = "string";
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while (**end_ptr != '\000')
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{
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if (**end_ptr == '\"' && !maybe_escape)
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{
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*end_ptr += 1;
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return;
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}
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if (**end_ptr == '\\')
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maybe_escape = TRUE;
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else
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maybe_escape = FALSE;
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*end_ptr += 1;
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}
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return;
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}
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/* not at the start of a tag. Find the next one. */
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for (i = 0; tokens[i] != NULL; i++)
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{
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next_token = strstr (text, tokens[i]);
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if (next_token)
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{
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if (*end_ptr)
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*end_ptr = (*end_ptr<next_token)?*end_ptr:next_token;
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else
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*end_ptr = next_token;
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}
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}
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for (i = 0; types[i] != NULL; i++)
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{
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next_token = strstr (text, types[i]);
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if (next_token)
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{
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if (*end_ptr)
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*end_ptr = (*end_ptr<next_token)?*end_ptr:next_token;
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else
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*end_ptr = next_token;
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}
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}
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for (i = 0; control[i] != NULL; i++)
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{
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next_token = strstr (text, control[i]);
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if (next_token)
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{
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if (*end_ptr)
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*end_ptr = (*end_ptr<next_token)?*end_ptr:next_token;
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else
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*end_ptr = next_token;
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}
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}
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return stdout_buf;
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}
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/* While not as cool as c-mode, this will do as a quick attempt at highlighting */
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void
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fontify (GtkTextBuffer *source_buffer)
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fontify (const char *format,
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GtkTextBuffer *source_buffer)
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{
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GtkTextIter start_iter, next_iter, tmp_iter;
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int state;
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GtkTextIter start, end;
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char *text;
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char *start_ptr, *end_ptr;
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const char *tag;
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GBytes *bytes;
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gtk_text_buffer_create_tag (source_buffer, "source",
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"font", "monospace",
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NULL);
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gtk_text_buffer_create_tag (source_buffer, "comment",
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"foreground", "DodgerBlue",
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NULL);
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gtk_text_buffer_create_tag (source_buffer, "type",
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"foreground", "ForestGreen",
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NULL);
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gtk_text_buffer_create_tag (source_buffer, "string",
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"foreground", "RosyBrown",
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"weight", PANGO_WEIGHT_BOLD,
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NULL);
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gtk_text_buffer_create_tag (source_buffer, "control",
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"foreground", "purple",
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NULL);
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gtk_text_buffer_create_tag (source_buffer, "preprocessor",
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"style", PANGO_STYLE_OBLIQUE,
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"foreground", "burlywood4",
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NULL);
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gtk_text_buffer_create_tag (source_buffer, "function",
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"weight", PANGO_WEIGHT_BOLD,
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"foreground", "DarkGoldenrod4",
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NULL);
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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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gtk_text_buffer_get_bounds (source_buffer, &start_iter, &tmp_iter);
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gtk_text_buffer_apply_tag_by_name (source_buffer, "source", &start_iter, &tmp_iter);
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state = STATE_NORMAL;
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gtk_text_buffer_get_iter_at_offset (source_buffer, &start_iter, 0);
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next_iter = start_iter;
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while (gtk_text_iter_forward_line (&next_iter))
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bytes = fontify_text (format, text);
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if (bytes)
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{
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gboolean start = TRUE;
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start_ptr = text = gtk_text_iter_get_text (&start_iter, &next_iter);
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const char *markup;
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gsize len;
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do
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{
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parse_chars (start_ptr, &end_ptr, &state, &tag, start);
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start = FALSE;
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if (end_ptr)
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{
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tmp_iter = start_iter;
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gtk_text_iter_forward_chars (&tmp_iter, end_ptr - start_ptr);
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}
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else
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{
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tmp_iter = next_iter;
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}
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if (tag)
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gtk_text_buffer_apply_tag_by_name (source_buffer, tag, &start_iter, &tmp_iter);
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start_iter = tmp_iter;
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start_ptr = end_ptr;
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}
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while (end_ptr);
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g_free (text);
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start_iter = next_iter;
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markup = g_bytes_get_data (bytes, &len);
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gtk_text_buffer_delete (source_buffer, &start, &end);
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gtk_text_buffer_insert_markup (source_buffer, &start, markup, len);
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g_bytes_unref (bytes);
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}
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g_free (text);
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}
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static GtkWidget *
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display_image (const char *resource)
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display_image (const char *format,
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const char *resource)
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{
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GtkWidget *sw, *image;
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@ -614,7 +347,8 @@ display_image (const char *resource)
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}
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static GtkWidget *
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display_text (const char *resource)
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display_text (const char *format,
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const char *resource)
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{
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GtkTextBuffer *buffer;
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GtkWidget *textview, *sw;
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@ -641,8 +375,10 @@ display_text (const char *resource)
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buffer = gtk_text_buffer_new (NULL);
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gtk_text_buffer_set_text (buffer, g_bytes_get_data (bytes, NULL), g_bytes_get_size (bytes));
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if (g_str_has_suffix (resource, ".c"))
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fontify (buffer);
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if (format)
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fontify (format, buffer);
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gtk_text_view_set_buffer (GTK_TEXT_VIEW (textview), buffer);
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g_bytes_unref (bytes);
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@ -657,7 +393,8 @@ display_text (const char *resource)
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}
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static GtkWidget *
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display_video (const char *resource)
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display_video (const char *format,
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const char *resource)
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{
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GtkWidget *video;
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@ -684,18 +421,20 @@ display_nothing (const char *resource)
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static struct {
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const char *extension;
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GtkWidget * (* display_func) (const char *resource);
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const char *format;
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GtkWidget * (* display_func) (const char *format,
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const char *resource);
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} display_funcs[] = {
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{ ".gif", display_image },
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{ ".jpg", display_image },
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{ ".png", display_image },
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{ ".c", display_text },
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{ ".css", display_text },
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{ ".glsl", display_text },
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{ ".h", display_text },
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{ ".txt", display_text },
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{ ".ui", display_text },
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{ ".webm", display_video }
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{ ".gif", NULL, display_image },
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{ ".jpg", NULL, display_image },
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{ ".png", NULL, display_image },
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{ ".c", "c", display_text },
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{ ".css", "css", display_text },
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{ ".glsl", NULL, display_text },
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{ ".h", "c", display_text },
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{ ".txt", NULL, display_text },
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{ ".ui", "xml", display_text },
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{ ".webm", NULL, display_video }
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};
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static void
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@ -725,7 +464,7 @@ add_data_tab (const char *demoname)
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}
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if (j < G_N_ELEMENTS(display_funcs))
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widget = display_funcs[j].display_func (resource_name);
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widget = display_funcs[j].display_func (display_funcs[j].format, resource_name);
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else
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widget = display_nothing (resource_name);
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@ -920,7 +659,7 @@ load_file (const char *demoname,
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g_strfreev (lines);
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fontify (source_buffer);
|
||||
fontify ("c", source_buffer);
|
||||
|
||||
gtk_text_buffer_end_irreversible_action (source_buffer);
|
||||
gtk_text_view_set_buffer (GTK_TEXT_VIEW (source_view), source_buffer);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user