/* Helper function: move the pager to the last visible position in the buffer,
and return the distance between the pager and the end of the buffer in buffer
coordinates */
-static gint
-move_pager_and_get_scroll_distance(GtkTextView *textview)
+static void
+move_pager_and_get_scroll_distance(GtkTextView *textview, gint *view_height, gint *scroll_distance, gboolean move )
{
GdkRectangle pagerpos, endpos, visiblerect;
GtkTextIter oldpager, newpager, end;
/* Get an iter at the lower right corner of the visible part of the buffer */
gtk_text_view_get_visible_rect(textview, &visiblerect);
- gtk_text_view_get_iter_at_location(textview, &newpager, visiblerect.x + visiblerect.width, visiblerect.y + visiblerect.height);
+ gtk_text_view_get_iter_at_location(
+ textview,
+ &newpager,
+ visiblerect.x + visiblerect.width,
+ visiblerect.y + visiblerect.height
+ );
gtk_text_buffer_get_iter_at_mark(buffer, &oldpager, pager);
- gtk_text_buffer_move_mark(buffer, pager, &newpager);
+ if(move)
+ gtk_text_buffer_move_mark(buffer, pager, &newpager);
/* Get the buffer coordinates of the pager and the end iter */
gtk_text_buffer_get_end_iter(buffer, &end);
gtk_text_buffer_get_iter_at_mark(buffer, &newpager, pager);
gtk_text_view_get_iter_location(textview, &newpager, &pagerpos);
gtk_text_view_get_iter_location(textview, &end, &endpos);
+
+ /*
+ g_printerr("View height = %d\n", visiblerect.height);
+ g_printerr("End - Pager = %d - %d = %d\n", endpos.y, pagerpos.y, endpos.y - pagerpos.y);
+ */
- //g_printerr("View height = %d\n", visiblerect.height);
- //g_printerr("End - Pager = %d\n", endpos.y - pagerpos.y);
-
- return endpos.y - pagerpos.y;
+ *view_height = visiblerect.height;
+ *scroll_distance = endpos.y - pagerpos.y;
}
/* Helper function: turn on paging for this textview */
g_signal_handler_block(win->widget, win->pager_keypress_handler);
}
-/* Update the pager position after new text is inserted in the buffer */
-void
-pager_after_insert_text(GtkTextBuffer *buffer, GtkTextIter *location, gchar *text, gint len, winid_t win)
-{
- while(gtk_events_pending())
- gtk_main_iteration();
-
- /* Move the pager to the last visible character in the buffer */
- gint scroll_distance = move_pager_and_get_scroll_distance( GTK_TEXT_VIEW(win->widget) );
-
- if(scroll_distance > 0 && !win->currently_paging)
- start_paging(win);
-}
-
+/* When the user scrolls up in a textbuffer, start paging. */
void
pager_after_adjustment_changed(GtkAdjustment *adj, winid_t win)
{
- while(gtk_events_pending())
- gtk_main_iteration();
-
/* Move the pager, etc. */
- gint scroll_distance = move_pager_and_get_scroll_distance( GTK_TEXT_VIEW(win->widget) );
-
+ gint scroll_distance, view_height;
+ move_pager_and_get_scroll_distance( GTK_TEXT_VIEW(win->widget), &view_height, &scroll_distance, TRUE );
+
if(scroll_distance > 0 && !win->currently_paging)
start_paging(win);
else if(scroll_distance == 0 && win->currently_paging)
gboolean
pager_on_key_press_event(GtkTextView *textview, GdkEventKey *event, winid_t win)
{
- /*** ALTERNATIVE, POSSIBLY INFERIOR, METHOD OF SCROLLING ***
- GtkTextMark *pagermark = gtk_text_buffer_get_mark(buffer, "pager_position");
- gtk_text_view_scroll_to_mark(textview, pagermark, 0.0, TRUE, 0.0, 0.0);
- */
-
GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment( GTK_SCROLLED_WINDOW(win->frame) );
- gdouble step_increment, page_size, upper, lower, value;
+ gdouble page_size, upper, lower, value;
g_object_get(adj,
"page-size", &page_size,
- "step-increment", &step_increment,
"upper", &upper,
"lower", &lower,
"value", &value,
NULL);
switch (event->keyval) {
- case GDK_space: case GDK_KP_Space: case GDK_Page_Down: case GDK_KP_Page_Down:
+ case GDK_KEY_space: case GDK_KEY_KP_Space:
+ case GDK_KEY_Page_Down: case GDK_KEY_KP_Page_Down:
+ case GDK_KEY_Return: case GDK_KEY_KP_Enter:
gtk_adjustment_set_value(adj, CLAMP(value + page_size, lower, upper - page_size));
return TRUE;
- case GDK_Page_Up: case GDK_KP_Page_Up:
+ case GDK_KEY_Page_Up: case GDK_KEY_KP_Page_Up:
gtk_adjustment_set_value(adj, CLAMP(value - page_size, lower, upper - page_size));
return TRUE;
- case GDK_Return: case GDK_KP_Enter:
- gtk_adjustment_set_value(adj, CLAMP(value + step_increment, lower, upper - page_size));
- return TRUE;
/* don't handle "up" and "down", they're used for input history */
}
return FALSE; /* if the key wasn't handled here, pass it to other handlers */
}
-/* Draw the "more" prompt on top of the buffer, after the regular expose event has run */
+/* Draw the "more" prompt on top of the buffer, after the regular draw event has run */
gboolean
-pager_on_expose(GtkTextView *textview, GdkEventExpose *event, winid_t win)
+pager_on_draw(GtkTextView *textview, cairo_t *cr, winid_t win)
{
/* Calculate the position of the 'more' tag */
gint promptwidth, promptheight;
pango_layout_get_pixel_size(win->pager_layout, &promptwidth, &promptheight);
- gint winx, winy, winwidth, winheight;
- gdk_window_get_position(event->window, &winx, &winy);
- gdk_drawable_get_size(GDK_DRAWABLE(event->window), &winwidth, &winheight);
+ int winwidth = gtk_widget_get_allocated_width( GTK_WIDGET(textview) );
+ int winheight = gtk_widget_get_allocated_height( GTK_WIDGET(textview) );
/* Draw the 'more' tag */
- GdkGC *context = gdk_gc_new(GDK_DRAWABLE(event->window));
- /*
- gdk_draw_layout_with_colors(event->window, context,
- winx + winwidth - promptwidth,
- winy + winheight - promptheight,
- prompt, &white, &red);
- */
- gdk_draw_layout(event->window, context,
- winx + winwidth - promptwidth,
- winy + winheight - promptheight,
- win->pager_layout);
+ cairo_move_to(cr, winwidth - promptwidth, winheight - promptheight);
+ pango_cairo_show_layout(cr, win->pager_layout);
return FALSE; /* Propagate event further */
}
+
+/* Check whether paging should be done. This function is called after the
+ * textview has finished validating text positions. */
+void
+pager_after_size_allocate(GtkTextView *textview, GdkRectangle *allocation, winid_t win)
+{
+ /* Move the pager to the last visible character in the buffer */
+ gint view_height, scroll_distance;
+ move_pager_and_get_scroll_distance(GTK_TEXT_VIEW(win->widget), &view_height, &scroll_distance, FALSE);
+
+ if(view_height <= 1)
+ /* Paging is unusable when window is too small */
+ return;
+
+ /* If not in interactive mode, then just scroll to the bottom. */
+ ChimaraGlk *glk = CHIMARA_GLK(gtk_widget_get_ancestor(GTK_WIDGET(textview), CHIMARA_TYPE_GLK));
+ g_assert(glk);
+ if(!chimara_glk_get_interactive(glk)) {
+ GtkTextIter end;
+ gtk_text_buffer_get_end_iter(gtk_text_view_get_buffer(textview), &end);
+ gtk_text_view_scroll_to_iter(textview, &end, 0.0, TRUE, 0.0, 0.0);
+ return;
+ }
+
+ /* Scroll past text already read by user. This is automatic scrolling, so disable the pager_ajustment_handler
+ * first, that acts on the belief the scolling is performed by the user. */
+ GtkAdjustment *adj = gtk_scrolled_window_get_vadjustment(GTK_SCROLLED_WINDOW(win->frame));
+ g_signal_handler_block(adj, win->pager_adjustment_handler);
+ GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(win->widget));
+ GtkTextMark *pager_position = gtk_text_buffer_get_mark(buffer, "pager_position");
+ gtk_text_view_scroll_to_mark(GTK_TEXT_VIEW(win->widget), pager_position, 0.0, TRUE, 0.0, 0.0);
+ g_signal_handler_unblock(adj, win->pager_adjustment_handler);
+
+ if(!win->currently_paging) {
+ if(scroll_distance > view_height) {
+ start_paging(win);
+ gdk_window_invalidate_rect(gtk_widget_get_window(win->widget), NULL, TRUE);
+ }
+ }
+}
+
+void
+pager_update(winid_t win)
+{
+ GtkTextIter input_iter;
+ GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(win->widget));
+ GtkTextMark *input_position = gtk_text_buffer_get_mark(buffer, "input_position");
+ GtkTextMark *pager_position = gtk_text_buffer_get_mark(buffer, "pager_position");
+ gtk_text_buffer_get_iter_at_mark(buffer, &input_iter, input_position);
+ gtk_text_buffer_move_mark(buffer, pager_position, &input_iter);
+}
projects / projects / chimara / chimara.git / blobdiff