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Handle legacy window titles by rendering them not unicode-compatible.

This commit is contained in:
Michael Stapelberg 2009-03-11 21:31:54 +01:00
parent 17bcdd8b0f
commit cc2c63b860
5 changed files with 81 additions and 4 deletions
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4
include/data.h
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@ -223,6 +223,10 @@ struct Client {
/* Name (= window title) */
char *name;
/* name_len stores the real string length (glyphs) of the window title if the client uses
_NET_WM_NAME. Otherwise, it is set to -1 to indicate that name should be just passed
to X as 8-bit string and therefore will not be rendered correctly. This behaviour is
to support legacy applications which do not set _NET_WM_NAME */
int name_len;
/* fullscreen is pretty obvious */

2
include/handlers.h
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@ -21,6 +21,8 @@ int handle_configure_request(void *prophs, xcb_connection_t *conn, xcb_configure
int handle_unmap_notify_event(void *data, xcb_connection_t *conn, xcb_unmap_notify_event_t *event);
int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop);
int handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop);
int handle_expose_event(void *data, xcb_connection_t *conn, xcb_expose_event_t *event);
int handle_client_message(void *data, xcb_connection_t *conn, xcb_client_message_event_t *event);
int handle_window_type(void *data, xcb_connection_t *conn, uint8_t state, xcb_window_t window,

64
src/handlers.c
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@ -584,8 +584,8 @@ int handle_unmap_notify_event(void *data, xcb_connection_t *conn, xcb_unmap_noti
int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
LOG("window's name changed.\n");
if (prop == NULL) {
LOG("prop == NULL\n");
if (prop == NULL || xcb_get_property_value_length(prop) == 0) {
LOG("_NET_WM_NAME not specified, not changing\n");
return 1;
}
Client *client = table_get(byChild, window);
@ -632,6 +632,66 @@ int handle_windowname_change(void *data, xcb_connection_t *conn, uint8_t state,
return 1;
}
/*
* We handle legacy window names (titles) which are in COMPOUND_TEXT encoding. However, we
* just pass them along, so when containing non-ASCII characters, those will be rendering
* incorrectly. In order to correctly render unicode window titles in i3, an application
* has to set _NET_WM_NAME, which is in UTF-8 encoding.
*
* On every update, a message is put out to the user, so he may improve the situation and
* update applications which display filenames in their title to correctly use
* _NET_WM_NAME and therefore support unicode.
*
*/
int handle_windowname_change_legacy(void *data, xcb_connection_t *conn, uint8_t state,
xcb_window_t window, xcb_atom_t atom, xcb_get_property_reply_t *prop) {
LOG("window's name changed (legacy).\n");
if (prop == NULL) {
LOG("prop == NULL\n");
return 1;
}
Client *client = table_get(byChild, window);
if (client == NULL)
return 1;
/* Save the old pointer to make the update atomic */
char *new_name;
int new_len;
asprintf(&new_name, "%.*s", xcb_get_property_value_length(prop), (char*)xcb_get_property_value(prop));
/* Convert it to UCS-2 here for not having to convert it later every time we want to pass it to X */
LOG("Name should change to \"%s\"\n", new_name);
/* Check if they are the same and don’t update if so. */
if (client->name != NULL &&
strlen(new_name) == strlen(client->name) &&
strcmp(client->name, new_name) == 0) {
LOG("Name did not change, not updating\n");
free(new_name);
return 1;
}
LOG("Using legacy window title. Note that in order to get Unicode window titles in i3,"
"the application has to set _NET_WM_NAME which is in UTF-8 encoding.\n");
char *old_name = client->name;
client->name = new_name;
client->name_len = -1;
if (old_name != NULL)
free(old_name);
/* If the client is a dock window, we don’t need to render anything */
if (client->dock)
return 1;
if (client->container->mode == MODE_STACK)
render_container(conn, client->container);
else decorate_window(conn, client, client->frame, client->titlegc, 0);
xcb_flush(conn);
return 1;
}
/*
* Expose event means we should redraw our windows (= title bar)
*

7
src/layout.c
View File

@ -169,6 +169,13 @@ void decorate_window(xcb_connection_t *conn, Client *client, xcb_drawable_t draw
uint32_t values[] = { text_color, background_color, font->id };
xcb_change_gc(conn, gc, mask, values);
/* name_len == -1 means this is a legacy application which does not specify _NET_WM_NAME,
and we don’t handle the old window name (COMPOUND_TEXT) but only _NET_WM_NAME, which
is UTF-8 */
if (client->name_len == -1)
xcb_image_text_8(conn, strlen(client->name), drawable, gc, 3 /* X */,
offset + font->height /* Y = baseline of font */, client->name);
else
xcb_image_text_16(conn, client->name_len, drawable, gc, 3 /* X */,
offset + font->height /* Y = baseline of font */, (xcb_char2b_t*)client->name);
}

4
src/mainx.c
View File

@ -105,6 +105,7 @@ void manage_window(xcb_property_handlers_t *prophs, xcb_connection_t *conn, xcb_
if (attr && geom) {
reparent_window(conn, window, attr->visual, geom->root, geom->depth,
geom->x, geom->y, geom->width, geom->height);
xcb_property_changed(prophs, XCB_PROPERTY_NEW_VALUE, window, WM_NAME);
xcb_property_changed(prophs, XCB_PROPERTY_NEW_VALUE, window, atoms[_NET_WM_NAME]);
}
@ -467,6 +468,9 @@ int main(int argc, char *argv[], char *env[]) {
/* Watch _NET_WM_NAME (= title of the window in UTF-8) property */
xcb_property_set_handler(&prophs, atoms[_NET_WM_NAME], 128, handle_windowname_change, NULL);
/* Watch WM_NAME (= title of the window in compound text) property for legacy applications */
xcb_watch_wm_name(&prophs, 128, handle_windowname_change_legacy, NULL);
/* Set up the atoms we support */
check_error(conn, xcb_change_property_checked(conn, XCB_PROP_MODE_REPLACE, root, atoms[_NET_SUPPORTED],
ATOM, 32, 7, atoms), "Could not set _NET_SUPPORTED");