/* called when some state in an embedded html object has changed ... do a redraw */
static void
html_embedded_object_changed (GtkHTMLEmbedded *eb,
HTMLEngine *e)
{
HTMLObject *object;
object = HTML_OBJECT (g_object_get_data (G_OBJECT (eb), "embeddedelement"));
if (object)
html_object_calc_size (object, e->painter, NULL);
html_engine_schedule_update (e);
}
static gboolean
relayout (HTMLObject *self,
HTMLEngine *engine,
HTMLObject *child)
{
gint prev_width, prev_ascent, prev_descent;
gboolean changed;
if (html_engine_frozen (engine))
return FALSE;
if (child == NULL)
child = HTML_CLUE (self)->head;
html_object_calc_size (child, engine->painter, NULL);
HTML_CLUE (self)->curr = NULL;
prev_width = self->width;
prev_ascent = self->ascent;
prev_descent = self->descent;
changed = html_cluev_do_layout (self, engine->painter, FALSE, NULL);
if (changed)
html_engine_queue_draw (engine, self);
if (prev_width == self->width
&& prev_ascent == self->ascent
&& prev_descent == self->descent)
return FALSE;
if (self->parent == NULL) {
/* FIXME resize the widget, e.g. scrollbars and such. */
html_engine_queue_draw (engine, self);
/* FIXME extreme ugliness. */
self->x = 0;
self->y = self->ascent;
} else {
/* Relayout our parent starting from us. */
if (!html_object_relayout (self->parent, engine, self))
html_engine_queue_draw (engine, self);
}
/* If the object has shrunk, we have to clean the areas around
it so that we don't leave garbage on the screen. FIXME:
this wastes some time if there is an object on the right of
or under this one. */
if (prev_ascent + prev_descent > self->ascent + self->descent)
html_engine_queue_clear (engine,
self->x,
self->y + self->descent,
self->width,
(prev_ascent + prev_descent
- (self->ascent + self->descent)));
if (prev_width > self->width)
html_engine_queue_clear (engine,
self->x + self->width,
self->y - self->ascent,
prev_width - self->width,
self->ascent + self->descent);
return TRUE;
}
static gboolean
html_cluev_do_layout (HTMLObject *o, HTMLPainter *painter, gboolean calc_size, GList **changed_objs)
{
HTMLClueV *cluev;
HTMLClue *clue;
HTMLObject *obj;
HTMLObject *aclue;
GList *local_changed_objs;
gint lmargin;
gboolean changed;
gint old_width, old_ascent, old_descent;
gint new_x;
gint pixel_size;
gint padding;
gint padding2;
gboolean first_change;
gint first_y_off = 0;
/* printf ("HTMLClueV::do_layout\n"); */
cluev = HTML_CLUEV (o);
clue = HTML_CLUE (o);
pixel_size = html_painter_get_pixel_size (painter);
padding = pixel_size * (cluev->padding + cluev->border_width);
padding2 = 2 * padding;
old_width = o->width;
old_ascent = o->ascent;
old_descent = o->descent;
changed = FALSE;
first_change = TRUE;
local_changed_objs = NULL;
lmargin = get_lmargin (o, painter);
/* If we have already called calc_size for the children, then just
continue from the last object done in previous call. */
if (clue->curr != NULL) {
if (clue->curr->prev)
o->ascent = clue->curr->prev->y + clue->curr->prev->descent;
else
o->ascent = padding;
remove_aligned_by_parent (cluev, clue->curr);
} else {
o->width = 0;
o->ascent = padding;
o->descent = 0;
clue->curr = clue->head;
}
while (clue->curr != NULL) {
gint old_y, old_y_off, new_y_off;
/* Set an initial ypos so that the alignment stuff knows where
the top of this object is */
old_y = clue->curr->y;
old_y_off = clue->curr->y - clue->curr->ascent;
clue->curr->y = o->ascent;
switch (html_object_get_clear (clue->curr)) {
case HTML_CLEAR_ALL: {
gint y;
do {
y = clue->curr->y;
clue->curr->y = html_clue_get_left_clear (clue, clue->curr->y);
clue->curr->y = html_clue_get_right_clear (clue, clue->curr->y);
} while (clue->curr->y != y);
break;
}
case HTML_CLEAR_LEFT:
clue->curr->y = html_clue_get_left_clear (clue, clue->curr->y);
break;
case HTML_CLEAR_RIGHT:
clue->curr->y = html_clue_get_right_clear (clue, clue->curr->y);
break;
case HTML_CLEAR_NONE:
break;
case HTML_CLEAR_INHERIT:
/* TODO */
break;
}
o->ascent = clue->curr->y;
lmargin = get_lmargin (o, painter);
if (calc_size)
changed |= html_object_calc_size (clue->curr, painter, changed_objs);
if (o->width < clue->curr->width + padding2)
o->width = clue->curr->width + padding2;
o->ascent += clue->curr->ascent + clue->curr->descent;
new_y_off = o->ascent - clue->curr->descent - clue->curr->ascent;
if (clue->curr->x != lmargin || old_y_off != new_y_off) {
if (changed_objs) {
/* printf ("y: %d ", o->ascent - clue->curr->descent); */
if (first_change) {
first_change = FALSE;
/* if it's new one (y == 0) clear from new y_off, else from old one or new one,
which one is higher */
first_y_off = old_y && old_y_off < new_y_off ? old_y_off : new_y_off;
/* printf ("\nfirst_y_off: %d x %d --> %d\n", old_y_off, new_y_off, first_y_off); */
}
html_object_add_to_changed (&local_changed_objs, clue->curr);
}
}
clue->curr->x = lmargin;
clue->curr->y = o->ascent - clue->curr->descent;
clue->curr = clue->curr->next;
}
o->ascent += padding;
/* Remember the last object so that we can start from here next time
we are called. */
clue->curr = clue->tail;
if (o->max_width != 0 && o->width < o->max_width)
o->width = o->max_width;
if (clue->halign == HTML_HALIGN_CENTER) {
for (obj = clue->head; obj != 0; obj = obj->next) {
new_x = lmargin + (o->width - obj->width - padding2) / 2;
if (obj->x != new_x) {
obj->x = new_x;
changed = TRUE;
}
}
} else if (clue->halign == HTML_HALIGN_RIGHT) {
for (obj = clue->head; obj != 0; obj = obj->next) {
new_x = lmargin + (o->width - obj->width - padding2);
if (obj->x != new_x) {
obj->x = new_x;
changed = TRUE;
}
}
}
for (aclue = cluev->align_left_list; aclue != NULL; aclue = cluev_next_aligned (aclue)) {
if (aclue->y + aclue->parent->y - aclue->parent->ascent > o->ascent)
o->ascent = aclue->y + aclue->parent->y - aclue->parent->ascent;
}
for (aclue = cluev->align_right_list; aclue != NULL; aclue = cluev_next_aligned (aclue)) {
if (aclue->y + aclue->parent->y - aclue->parent->ascent > o->ascent)
o->ascent = aclue->y + aclue->parent->y - aclue->parent->ascent;
}
if (!changed
&& (o->ascent != old_ascent || o->descent != old_descent || o->width != old_width))
changed = TRUE;
if (changed_objs && local_changed_objs) {
if (!first_change && o->width > o->max_width) {
add_clear_area_behind (changed_objs, o, o->max_width, first_y_off,
o->width - o->max_width, o->ascent + o->descent - first_y_off);
}
*changed_objs = g_list_concat (local_changed_objs, *changed_objs);
}
return changed;
}