First implementation of history buffer.

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

diff --git a/libchimara/input.c b/libchimara/input.c
index a0d2ec759eedd6a90bf3dfd90c0be1eb1cf1c9bb..d0a037a8856c2a719903d8e2f00cd1aa873159e1 100644 (file)
--- a/libchimara/input.c
+++ b/libchimara/input.c
@@ -22,7 +22,7 @@ request_char_event_common(winid_t win, gboolean unicode)
        ChimaraGlkPrivate *glk_data = g_private_get(glk_data_key);
 
        win->input_request_type = unicode? INPUT_REQUEST_CHARACTER_UNICODE : INPUT_REQUEST_CHARACTER;
-       g_signal_handler_unblock( G_OBJECT(win->widget), win->keypress_handler );
+       g_signal_handler_unblock( G_OBJECT(win->widget), win->char_input_keypress_handler );
 
        gdk_threads_enter();
        
@@ -93,7 +93,7 @@ glk_cancel_char_event(winid_t win)
        if(win->input_request_type == INPUT_REQUEST_CHARACTER || win->input_request_type == INPUT_REQUEST_CHARACTER_UNICODE)
        {
                win->input_request_type = INPUT_REQUEST_NONE;
-               g_signal_handler_block( G_OBJECT(win->widget), win->keypress_handler );
+               g_signal_handler_block( G_OBJECT(win->widget), win->char_input_keypress_handler );
        }
 }
 
@@ -157,7 +157,7 @@ text_grid_request_line_event_common(winid_t win, glui32 maxlen, gboolean insert,
     gtk_widget_show(win->input_entry);
     gtk_text_view_add_child_at_anchor(GTK_TEXT_VIEW(win->widget), win->input_entry, win->input_anchor);
        
-       g_signal_handler_unblock( G_OBJECT(win->widget), win->keypress_handler );
+       g_signal_handler_unblock( G_OBJECT(win->widget), win->char_input_keypress_handler );
 
        gtk_widget_grab_focus(win->input_entry);
        
@@ -355,12 +355,12 @@ glk_cancel_line_event(winid_t win, event_t *event)
        if(win->input_request_type != INPUT_REQUEST_LINE && win->input_request_type != INPUT_REQUEST_LINE_UNICODE)
                return;
 
-       g_signal_handler_block( G_OBJECT(win->widget), win->keypress_handler );
+       g_signal_handler_block( G_OBJECT(win->widget), win->char_input_keypress_handler );
 
        int chars_written = 0;
 
        if(win->type == wintype_TextGrid) {
-               g_signal_handler_block( G_OBJECT(win->widget), win->keypress_handler );
+               g_signal_handler_block( G_OBJECT(win->widget), win->char_input_keypress_handler );
                chars_written = finish_text_grid_line_input(win, FALSE);
        } else if(win->type == wintype_TextBuffer) {
                GtkTextBuffer *window_buffer = gtk_text_view_get_buffer( GTK_TEXT_VIEW(win->widget) );
@@ -396,7 +396,7 @@ 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( G_OBJECT(win->widget), win->keypress_handler );
+       g_signal_handler_block( G_OBJECT(win->widget), win->char_input_keypress_handler );
 
        return TRUE;
 }
@@ -407,15 +407,51 @@ on_line_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win
        switch(win->type)
        {
                case wintype_TextBuffer:
-                       if(event->keyval == GDK_Up || event->keyval == GDK_KP_Up)
-                       {
-                               
-                       }
-                       else if(event->keyval == GDK_Down || event->keyval == GDK_KP_Down)
+                       if(event->keyval == GDK_Up || event->keyval == GDK_KP_Up
+                               || event->keyval == GDK_Down || event->keyval == GDK_KP_Down)
                        {
+                               /* Prevent falling off the end of the history list */
+                               if( (event->keyval == GDK_Up || event->keyval == GDK_KP_Up)
+                                       && win->history_pos && win->history_pos->next == NULL)
+                                       return TRUE;
+                               if( (event->keyval == GDK_Down || event->keyval == GDK_KP_Down)
+                                       && (win->history_pos == NULL || win->history_pos->prev == NULL) )
+                                       return TRUE;
                        
+                               GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(win->widget));
+                               GtkTextIter start, end;
+                               /* Erase any text that was already typed */
+                               GtkTextMark *input_position = gtk_text_buffer_get_mark(buffer, "input_position");
+                               gtk_text_buffer_get_iter_at_mark(buffer, &start, input_position);
+                               gtk_text_buffer_get_end_iter(buffer, &end);
+                               
+                               if(win->history_pos == NULL) {
+                                       gchar *current_input = gtk_text_buffer_get_text(buffer, &start, &end, FALSE);
+                                       win->history = g_list_prepend(win->history, current_input);
+                                       win->history_pos = win->history;
+                               }
+                               
+                               gtk_text_buffer_delete(buffer, &start, &end);
+               
+                               if(event->keyval == GDK_Up || event->keyval == GDK_KP_Up)
+                               {
+                                       if(win->history_pos)
+                                               win->history_pos = g_list_next(win->history_pos);
+                                       else
+                                               win->history_pos = win->history;
+                               }
+                               else /* down */
+                                       win->history_pos = g_list_previous(win->history_pos);
+               
+                               /* Insert the history item into the window */
+                               gtk_text_buffer_get_end_iter(buffer, &end);
+                               
+                               g_signal_handler_block(buffer, win->insert_text_handler);
+                               gtk_text_buffer_insert_with_tags_by_name(buffer, &end, win->history_pos->data, -1, "input", NULL);
+                               g_signal_handler_unblock(buffer, win->insert_text_handler);
+                               return TRUE;
                        }
-                       break;
+                       return FALSE;
 
                /* If this is a text grid window, then redirect the key press to the line input GtkEntry */
                case wintype_TextGrid:
@@ -437,6 +473,7 @@ on_line_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win
                        return retval; /* Block this key event if the entry handled it */
                }
        }
+       return FALSE;
 }
 
 /* Internal function: finish handling a line input request, for both text grid and text buffer windows. */
@@ -520,8 +557,13 @@ finish_text_buffer_line_input(winid_t win, gboolean emit_signal)
        }
        
        /* Add the text to the window input history */
-       win->history = g_list_prepend(win->history, g_strdup(inserted_text));
-       win->history_pos = win->history;
+       if(win->history_pos != NULL)
+       {
+               g_free(win->history->data);
+               win->history = g_list_delete_link(win->history, win->history);
+       }
+       win->history = g_list_prepend(win->history, g_strdup(inserted_text));   
+       win->history_pos = NULL;
        
        g_free(inserted_text);
 
@@ -579,6 +621,13 @@ pasted into the window. */
 void
 after_window_insert_text(GtkTextBuffer *textbuffer, GtkTextIter *location, gchar *text, gint len, winid_t win) 
 {
+       /* Set the history position to NULL and erase the text we were already editing */
+       if(win->history_pos != NULL)
+       {
+               g_free(win->history->data);
+               win->history = g_list_delete_link(win->history, win->history);
+               win->history_pos = NULL;
+       }
        if( strchr(text, '\n') != NULL ) 
        {
                /* Remove signal handlers */
@@ -599,7 +648,7 @@ in a text grid window. */
 void
 on_input_entry_activate(GtkEntry *input_entry, winid_t win)
 {
-       g_signal_handler_block(win->widget, win->keypress_handler);
+       g_signal_handler_block(win->widget, win->char_input_keypress_handler);
 
        int chars_written = finish_text_grid_line_input(win, TRUE);
        ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(win->widget, CHIMARA_TYPE_GLK));
@@ -717,7 +766,7 @@ force_line_input_from_queue(winid_t win, event_t *event)
        else if(win->type == wintype_TextGrid)
        {
                /* Remove signal handlers so the line input doesn't get picked up again */
-               g_signal_handler_block(win->widget, win->keypress_handler);
+               g_signal_handler_block(win->widget, win->char_input_keypress_handler);
                
                /* Insert the forced input into the window */
                gtk_entry_set_text(GTK_ENTRY(win->input_entry), text);