Line terminators in text buffer windows
[projects/chimara/chimara.git] / libchimara / input.c
index 0bcfd4ddec725a61bb62b77bddad78a3bfddc539..6003f501bf7bff13a239e44a07a4ee232794ffb4 100644 (file)
@@ -3,6 +3,7 @@
 #include "input.h"
 #include "pager.h"
 #include "chimara-glk-private.h"
+#include "garglk.h"
 
 extern GPrivate *glk_data_key;
 
@@ -244,6 +245,7 @@ glk_request_line_event(winid_t win, char *buf, glui32 maxlen, glui32 initlen)
        win->line_input_buffer = buf;
        win->line_input_buffer_max_len = maxlen;
        win->echo_current_line_input = win->echo_line_input;
+       win->current_extra_line_terminators = g_slist_copy(win->extra_line_terminators);
 
        gchar *inserttext = (initlen > 0)? g_strndup(buf, initlen) : g_strdup("");
        switch(win->type)
@@ -312,11 +314,11 @@ glk_request_line_event_uni(winid_t win, glui32 *buf, glui32 maxlen, glui32 initl
        if(glk_data->register_arr)
         win->buffer_rock = (*glk_data->register_arr)(buf, maxlen, "&+#!Iu");
 
-
-
        win->input_request_type = INPUT_REQUEST_LINE_UNICODE;
        win->line_input_buffer_unicode = buf;
        win->line_input_buffer_max_len = maxlen;
+       win->echo_current_line_input = win->echo_line_input;
+       win->current_extra_line_terminators = g_slist_copy(win->extra_line_terminators);
 
        gchar *utf8;
        if(initlen > 0) {
@@ -467,9 +469,12 @@ on_line_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win
        switch(win->type)
        {
                case wintype_TextBuffer:
+               {
                        /* All text up to the input position is now regarded as being read by the user */
                        pager_update(win);
 
+                       GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(win->widget));
+
                        /* History up/down */
                        if(event->keyval == GDK_Up || event->keyval == GDK_KP_Up
                                || event->keyval == GDK_Down || event->keyval == GDK_KP_Down)
@@ -484,7 +489,6 @@ on_line_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win
                                        && (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");
@@ -520,7 +524,6 @@ on_line_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win
 
                        /* 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);
@@ -528,22 +531,34 @@ on_line_input_key_press_event(GtkWidget *widget, GdkEventKey *event, winid_t win
                                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;
                        }
 
-                       /* Handle the enter key, which could occur in the middle of the sentence. */
-                       else if(event->keyval == GDK_Return || event->keyval == GDK_KP_Enter) {
-                               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 FALSE; 
-                       }
+                       /* Handle the line terminators */
+                       else if(event->keyval == GDK_Return || event->keyval == GDK_KP_Enter
+                          || g_slist_find(win->current_extra_line_terminators, GUINT_TO_POINTER(event->keyval)))
+                       {
+                               /* Remove signal handlers */
+                               g_signal_handler_block(buffer, win->insert_text_handler);
+                               g_signal_handler_block(win->widget, win->line_input_keypress_handler);
 
+                               /* Insert a newline (even if line input was terminated with a different key */
+                               GtkTextIter end;
+                               gtk_text_buffer_get_end_iter(buffer, &end);
+                               gtk_text_buffer_insert(buffer, &end, "\n", 1);
+
+                               /* Make the window uneditable again and retrieve the text that was input */
+                               gtk_text_view_set_editable(GTK_TEXT_VIEW(win->widget), FALSE);
+
+                               int chars_written = finish_text_buffer_line_input(win, TRUE);
+                               ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(win->widget, CHIMARA_TYPE_GLK));
+                               event_throw(glk, evtype_LineInput, win, chars_written, 0);
+                               return TRUE;
+                       }
+               }
                        return FALSE;
 
                /* If this is a text grid window, then redirect the key press to the line input GtkEntry */
@@ -721,10 +736,7 @@ finish_text_grid_line_input(winid_t win, gboolean emit_signal)
 }
 
 /* Internal function: Callback for signal insert-text on a text buffer window.
-Runs after the default handler has already inserted the text.
-FIXME: This function assumes that newline was the last character typed into the
-window. That assumption is wrong if, for example, text containing a newline was
-pasted into the window. */
+Runs after the default handler has already inserted the text. */
 void
 after_window_insert_text(GtkTextBuffer *textbuffer, GtkTextIter *location, gchar *text, gint len, winid_t win)
 {
@@ -737,19 +749,6 @@ after_window_insert_text(GtkTextBuffer *textbuffer, GtkTextIter *location, gchar
                win->history = g_list_delete_link(win->history, win->history);
                win->history_pos = NULL;
        }
-       if( strchr(text, '\n') != NULL )
-       {
-               /* Remove signal handlers */
-               g_signal_handler_block(window_buffer, win->insert_text_handler);
-               g_signal_handler_block(win->widget, win->line_input_keypress_handler);
-
-               /* Make the window uneditable again and retrieve the text that was input */
-        gtk_text_view_set_editable(GTK_TEXT_VIEW(win->widget), FALSE);
-
-        int chars_written = finish_text_buffer_line_input(win, TRUE);
-        ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(win->widget, CHIMARA_TYPE_GLK));
-               event_throw(glk, evtype_LineInput, win, chars_written, 0);
-       }
 
        /* Apply the 'input' style to the text that was entered */
        GtkTextIter end_iter;
@@ -1022,6 +1021,92 @@ glk_set_echo_line_event(winid_t win, glui32 val)
        win->echo_line_input = val? TRUE : FALSE;
 }
 
+/* Internal function to convert from a Glk keycode to a GDK keyval. */
+static unsigned
+keycode_to_gdk_keyval(glui32 keycode)
+{
+       switch (keycode)
+       {
+               case keycode_Left:
+                       return GDK_Left;
+               case keycode_Right:
+                       return GDK_Right;
+               case keycode_Up:
+                       return GDK_Up;
+               case keycode_Down:
+                       return GDK_Down;
+               case keycode_Return:
+                       return GDK_Return;
+               case keycode_Delete:
+                       return GDK_Delete;
+               case keycode_Escape:
+                       return GDK_Escape;
+               case keycode_Tab:
+                       return GDK_Tab;
+               case keycode_PageUp:
+                       return GDK_Page_Up;
+               case keycode_PageDown:
+                       return GDK_Page_Down;
+               case keycode_Home:
+                       return GDK_Home;
+               case keycode_End:
+                       return GDK_End;
+               case keycode_Func1:
+                       return GDK_F1;
+               case keycode_Func2:
+                       return GDK_F2;
+               case keycode_Func3:
+                       return GDK_F3;
+               case keycode_Func4:
+                       return GDK_F4;
+               case keycode_Func5:
+                       return GDK_F5;
+               case keycode_Func6:
+                       return GDK_F6;
+               case keycode_Func7:
+                       return GDK_F7;
+               case keycode_Func8:
+                       return GDK_F8;
+               case keycode_Func9:
+                       return GDK_F9;
+               case keycode_Func10:
+                       return GDK_F10;
+               case keycode_Func11:
+                       return GDK_F11;
+               case keycode_Func12:
+                       return GDK_F12;
+               case keycode_Erase:
+                       return GDK_BackSpace;
+       }
+       unsigned keyval = gdk_unicode_to_keyval(keycode);
+       if(keyval < 0x01000000) /* magic number meaning illegal unicode point */
+               return keyval;
+       return 0;
+}
+
+/* Internal function to decide whether @keycode is a valid line terminator. */
+gboolean
+is_valid_line_terminator(glui32 keycode)
+{
+       switch(keycode) {
+               case keycode_Escape:
+               case keycode_Func1:
+               case keycode_Func2:
+               case keycode_Func3:
+               case keycode_Func4:
+               case keycode_Func5:
+               case keycode_Func6:
+               case keycode_Func7:
+               case keycode_Func8:
+               case keycode_Func9:
+               case keycode_Func10:
+               case keycode_Func11:
+               case keycode_Func12:
+                       return TRUE;
+       }
+       return FALSE;
+}
+
 /**
  * glk_set_terminators_line_event:
  * @win: The window for which to set the line input terminator keys.
@@ -1055,4 +1140,20 @@ void
 glk_set_terminators_line_event(winid_t win, glui32 *keycodes, glui32 count)
 {
        VALID_WINDOW(win, return);
+
+       g_slist_free(win->extra_line_terminators);
+       win->extra_line_terminators = NULL;
+
+       if(keycodes == NULL || count == 0)
+               return;
+
+       int i;
+       for(i = 0; i < count; i++)
+       {
+               unsigned key = keycode_to_gdk_keyval(keycodes[i]);
+               if(is_valid_line_terminator(keycodes[i]))
+                       win->extra_line_terminators = g_slist_prepend(win->extra_line_terminators, GUINT_TO_POINTER(key));
+               else
+                  WARNING_S("Ignoring invalid line terminator", gdk_keyval_name(key));
+       }
 }
\ No newline at end of file