Handle Home/End keys properly

[rodin/chimara.git] / libchimara / input.c

diff --git a/libchimara/input.c b/libchimara/input.c
index a2e0e4a8bd49d88d0f017a1efda711c4569b4b0a..96b6353f96f4b4fb9de6eff5dcb762020d4b64c7 100644 (file)
--- a/libchimara/input.c
+++ b/libchimara/input.c
@@ -8,15 +8,17 @@ extern GPrivate *glk_data_key;
 /* Forward declarations */
 static int finish_text_buffer_line_input(winid_t win, gboolean emit_signal);
 static int finish_text_grid_line_input(winid_t win, gboolean emit_signal);
+static void cancel_old_input_request(winid_t win);
 
 /* Internal function: code common to both flavors of char event request */
 void
 request_char_event_common(winid_t win, gboolean unicode)
 {
        VALID_WINDOW(win, return);
-       g_return_if_fail(win->input_request_type == INPUT_REQUEST_NONE);
        g_return_if_fail(win->type != wintype_TextBuffer || win->type != wintype_TextGrid);
 
+       cancel_old_input_request(win);
+
        flush_window_buffer(win);
 
        ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
@@ -239,10 +241,11 @@ glk_request_line_event(winid_t win, char *buf, glui32 maxlen, glui32 initlen)
 {
        VALID_WINDOW(win, return);
        g_return_if_fail(buf);
-       g_return_if_fail(win->input_request_type == INPUT_REQUEST_NONE);
        g_return_if_fail(win->type != wintype_TextBuffer || win->type != wintype_TextGrid);
        g_return_if_fail(initlen <= maxlen);
 
+       cancel_old_input_request(win);
+
        ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
 
        /* Register the buffer */
@@ -293,10 +296,10 @@ glk_request_line_event_uni(winid_t win, glui32 *buf, glui32 maxlen, glui32 initl
 {
        VALID_WINDOW(win, return);
        g_return_if_fail(buf);
-       g_return_if_fail(win->input_request_type == INPUT_REQUEST_NONE);
        g_return_if_fail(win->type != wintype_TextBuffer || win->type != wintype_TextGrid);
        g_return_if_fail(initlen <= maxlen);
 
+       cancel_old_input_request(win);
        ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
 
        /* Register the buffer */
@@ -368,6 +371,7 @@ glk_cancel_line_event(winid_t win, event_t *event)
 
        int chars_written = 0;
 
+       gdk_threads_enter();
        if(win->type == wintype_TextGrid) {
                chars_written = finish_text_grid_line_input(win, FALSE);
        } else if(win->type == wintype_TextBuffer) {
@@ -376,6 +380,7 @@ glk_cancel_line_event(winid_t win, event_t *event)
                g_signal_handler_block(window_buffer, win->insert_text_handler);
                chars_written = finish_text_buffer_line_input(win, FALSE);
        }
+       gdk_threads_leave();
 
        ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
        if(glk_data->unregister_arr)
@@ -392,6 +397,35 @@ glk_cancel_line_event(winid_t win, event_t *event)
        }
 }
 
+/* Helper function: Turn off shutdown key-press-event signal handler */
+static gboolean
+turn_off_handler(GNode *node)
+{
+       winid_t win = node->data;
+       g_signal_handler_block(win->widget, win->shutdown_keypress_handler);
+       return FALSE; /* don't stop */
+}
+
+/* Internal function: Callback for signal key-press-event while waiting for shutdown. */
+gboolean
+on_shutdown_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win)
+{
+       ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(widget, CHIMARA_TYPE_GLK));
+       g_assert(glk);
+       CHIMARA_GLK_USE_PRIVATE(glk, priv);
+       
+       /* Turn off all the signal handlers */
+       if(priv->root_window)
+               g_node_traverse(priv->root_window, G_IN_ORDER, G_TRAVERSE_LEAVES, -1, (GNodeTraverseFunc)turn_off_handler, NULL);
+       
+       /* Signal the Glk library that it can shut everything down now */
+       g_mutex_lock(priv->shutdown_lock);
+       g_cond_signal(priv->shutdown_key_pressed);
+       g_mutex_unlock(priv->shutdown_lock);
+       
+       return TRUE; /* block the event */
+}
+
 /* Internal function: General callback for signal key-press-event on a text buffer or text grid window. Used in character input on both text buffers and grids. Blocked when not in use. */
 gboolean
 on_char_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win)
@@ -405,7 +439,7 @@ on_char_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win
 
        /* Only one keypress will be handled */
        win->input_request_type = INPUT_REQUEST_NONE;
-       g_signal_handler_block( win->widget, win->char_input_keypress_handler );
+       g_signal_handler_block(win->widget, win->char_input_keypress_handler);
 
        return TRUE;
 }
@@ -416,6 +450,8 @@ on_line_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win
        switch(win->type)
        {
                case wintype_TextBuffer:
+
+                       /* History up/down */
                        if(event->keyval == GDK_Up || event->keyval == GDK_KP_Up
                                || event->keyval == GDK_Down || event->keyval == GDK_KP_Down)
                        {
@@ -460,6 +496,24 @@ on_line_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win
                                g_signal_handler_unblock(buffer, win->insert_text_handler);
                                return TRUE;
                        }
+
+                       /* Move to beginning/end of input field */
+                       else if(event->keyval == GDK_Home) {
+                               GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(win->widget));
+                               GtkTextIter input_iter;
+                               GtkTextMark *input_position = gtk_text_buffer_get_mark(buffer, "input_position");
+                               gtk_text_buffer_get_iter_at_mark(buffer, &input_iter, input_position);
+                               gtk_text_buffer_place_cursor(buffer, &input_iter);
+                               return TRUE;
+                       }
+                       else if(event->keyval == GDK_End) {
+                               GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(win->widget));
+                               GtkTextIter end_iter;
+                               gtk_text_buffer_get_end_iter(buffer, &end_iter);
+                               gtk_text_buffer_place_cursor(buffer, &end_iter);
+                               return TRUE;
+                       }
+
                        return FALSE;
 
                /* If this is a text grid window, then redirect the key press to the line input GtkEntry */
@@ -865,3 +919,25 @@ force_line_input_from_queue(winid_t win, event_t *event)
        event->val1 = chars_written;
        event->val2 = 0;
 }
+
+/*** Internal function: cancels any pending input requests on the window and presents a warning if not INPUT_REQUEST_NONE ***/
+void
+cancel_old_input_request(winid_t win)
+{
+       switch(win->input_request_type) {
+       case INPUT_REQUEST_NONE:
+               break; /* All is well */
+       case INPUT_REQUEST_CHARACTER:
+       case INPUT_REQUEST_CHARACTER_UNICODE:
+               glk_cancel_char_event(win);
+               WARNING("Cancelling pending char event");
+               break;
+       case INPUT_REQUEST_LINE:
+       case INPUT_REQUEST_LINE_UNICODE:
+               glk_cancel_line_event(win, NULL);
+               WARNING("Cancelling pending line event");
+               break;
+       default:
+               WARNING("Could not cancel pending input request: unknown input request");
+       }
+}