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Don't recalculate the layout on each gkt_label_ensure_layout () for

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2001-11-14  Alex Larsson  <alexl@redhat.com>

	* gtk/gtklabel.c:
	Don't recalculate the layout on each gkt_label_ensure_layout () for
	wrapped labels.
This commit is contained in:
Alex Larsson 2001-11-14 23:10:53 +00:00 committed by Alexander Larsson
parent 99fea7f976
commit cfb30b2d72
8 changed files with 135 additions and 120 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
2001-11-14 Alex Larsson <alexl@redhat.com>
* gtk/gtklabel.c:
Don't recalculate the layout on each gkt_label_ensure_layout () for
wrapped labels.
Wed Nov 14 17:40:23 2001 Jonathan Blandford <jrb@redhat.com>
* gtk/gtktreeview.c (gtk_tree_view_get_expander_column): Return

6
ChangeLog.pre-2-0
View File

@ -1,3 +1,9 @@
2001-11-14 Alex Larsson <alexl@redhat.com>
* gtk/gtklabel.c:
Don't recalculate the layout on each gkt_label_ensure_layout () for
wrapped labels.
Wed Nov 14 17:40:23 2001 Jonathan Blandford <jrb@redhat.com>
* gtk/gtktreeview.c (gtk_tree_view_get_expander_column): Return

6
ChangeLog.pre-2-10
View File

@ -1,3 +1,9 @@
2001-11-14 Alex Larsson <alexl@redhat.com>
* gtk/gtklabel.c:
Don't recalculate the layout on each gkt_label_ensure_layout () for
wrapped labels.
Wed Nov 14 17:40:23 2001 Jonathan Blandford <jrb@redhat.com>
* gtk/gtktreeview.c (gtk_tree_view_get_expander_column): Return

6
ChangeLog.pre-2-2
View File

@ -1,3 +1,9 @@
2001-11-14 Alex Larsson <alexl@redhat.com>
* gtk/gtklabel.c:
Don't recalculate the layout on each gkt_label_ensure_layout () for
wrapped labels.
Wed Nov 14 17:40:23 2001 Jonathan Blandford <jrb@redhat.com>
* gtk/gtktreeview.c (gtk_tree_view_get_expander_column): Return

6
ChangeLog.pre-2-4
View File

@ -1,3 +1,9 @@
2001-11-14 Alex Larsson <alexl@redhat.com>
* gtk/gtklabel.c:
Don't recalculate the layout on each gkt_label_ensure_layout () for
wrapped labels.
Wed Nov 14 17:40:23 2001 Jonathan Blandford <jrb@redhat.com>
* gtk/gtktreeview.c (gtk_tree_view_get_expander_column): Return

6
ChangeLog.pre-2-6
View File

@ -1,3 +1,9 @@
2001-11-14 Alex Larsson <alexl@redhat.com>
* gtk/gtklabel.c:
Don't recalculate the layout on each gkt_label_ensure_layout () for
wrapped labels.
Wed Nov 14 17:40:23 2001 Jonathan Blandford <jrb@redhat.com>
* gtk/gtktreeview.c (gtk_tree_view_get_expander_column): Return

6
ChangeLog.pre-2-8
View File

@ -1,3 +1,9 @@
2001-11-14 Alex Larsson <alexl@redhat.com>
* gtk/gtklabel.c:
Don't recalculate the layout on each gkt_label_ensure_layout () for
wrapped labels.
Wed Nov 14 17:40:23 2001 Jonathan Blandford <jrb@redhat.com>
* gtk/gtktreeview.c (gtk_tree_view_get_expander_column): Return

211
gtk/gtklabel.c
View File

@ -136,9 +136,7 @@ static void gtk_label_hierarchy_changed (GtkWidget *widget,
static void gtk_label_create_window (GtkLabel *label);
static void gtk_label_destroy_window (GtkLabel *label);
static void gtk_label_clear_layout (GtkLabel *label);
static void gtk_label_ensure_layout (GtkLabel *label,
gint *widthp,
gint *heightp);
static void gtk_label_ensure_layout (GtkLabel *label);
static void gtk_label_select_region_index (GtkLabel *label,
gint anchor_index,
gint end_index);
@ -1319,9 +1317,7 @@ gtk_label_clear_layout (GtkLabel *label)
}
static void
gtk_label_ensure_layout (GtkLabel *label,
gint *widthp,
gint *heightp)
gtk_label_ensure_layout (GtkLabel *label)
{
GtkWidget *widget;
PangoRectangle logical_rect;
@ -1329,27 +1325,6 @@ gtk_label_ensure_layout (GtkLabel *label,
widget = GTK_WIDGET (label);
/*
* There are a number of conditions which will necessitate re-filling
* our text:
*
* 1. text changed.
* 2. justification changed either from to to GTK_JUSTIFY_FILL.
* 3. font changed.
*
* These have been detected elsewhere, and label->words will be zero,
* if one of the above has occured.
*
* Additionally, though, if GTK_JUSTIFY_FILL, we need to re-fill if:
*
* 4. gtk_widget_set_usize has changed the requested width.
* 5. gtk_misc_set_padding has changed xpad.
* 6. maybe others?...
*
* Too much of a pain to detect all these case, so always re-fill. I
* don't think it's really that slow.
*/
rwidth = label->misc.xpad * 2;
rheight = label->misc.ypad * 2;
@ -1383,107 +1358,74 @@ gtk_label_ensure_layout (GtkLabel *label,
}
pango_layout_set_alignment (label->layout, align);
}
if (label->wrap)
{
GtkWidgetAuxInfo *aux_info;
gint longest_paragraph;
gint width, height;
gint real_width;
aux_info = _gtk_widget_get_aux_info (widget, FALSE);
if (aux_info && aux_info->width > 0)
if (label->wrap)
{
pango_layout_set_width (label->layout, aux_info->width * PANGO_SCALE);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
GtkWidgetAuxInfo *aux_info;
gint longest_paragraph;
gint width, height;
rwidth += aux_info->width;
rheight += PANGO_PIXELS (logical_rect.height);
}
else
{
pango_layout_set_width (label->layout, -1);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
width = logical_rect.width;
height = logical_rect.height;
/* Try to guess a reasonable maximum width
*/
longest_paragraph = width;
width = MIN (width,
PANGO_SCALE * gdk_string_width (gtk_style_get_font (GTK_WIDGET (label)->style),
"This long string gives a good enough length for any line to have."));
width = MIN (width,
PANGO_SCALE * (gdk_screen_width () + 1) / 2);
pango_layout_set_width (label->layout, width);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
real_width = logical_rect.width;
height = logical_rect.height;
/* Unfortunately, the above may leave us with a very unbalanced looking paragraph,
* so we try short search for a narrower width that leaves us with the same height
*/
if (longest_paragraph > 0)
aux_info = _gtk_widget_get_aux_info (widget, FALSE);
if (aux_info && aux_info->width > 0)
pango_layout_set_width (label->layout, aux_info->width * PANGO_SCALE);
else
{
gint nlines, perfect_width;
pango_layout_set_width (label->layout, -1);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
nlines = pango_layout_get_line_count (label->layout);
perfect_width = (longest_paragraph + nlines - 1) / nlines;
width = logical_rect.width;
if (perfect_width < width)
/* Try to guess a reasonable maximum width */
longest_paragraph = width;
width = MIN (width,
PANGO_SCALE * gdk_string_width (gtk_style_get_font (GTK_WIDGET (label)->style),
"This long string gives a good enough length for any line to have."));
width = MIN (width,
PANGO_SCALE * (gdk_screen_width () + 1) / 2);
pango_layout_set_width (label->layout, width);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
height = logical_rect.height;
/* Unfortunately, the above may leave us with a very unbalanced looking paragraph,
* so we try short search for a narrower width that leaves us with the same height
*/
if (longest_paragraph > 0)
{
pango_layout_set_width (label->layout, perfect_width);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
gint nlines, perfect_width;
if (logical_rect.height <= height)
{
width = perfect_width;
real_width = logical_rect.width;
height = logical_rect.height;
}
else
{
gint mid_width = (perfect_width + width) / 2;
nlines = pango_layout_get_line_count (label->layout);
perfect_width = (longest_paragraph + nlines - 1) / nlines;
if (mid_width > perfect_width)
if (perfect_width < width)
{
pango_layout_set_width (label->layout, perfect_width);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
if (logical_rect.height <= height)
width = perfect_width;
else
{
pango_layout_set_width (label->layout, mid_width);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
gint mid_width = (perfect_width + width) / 2;
if (logical_rect.height <= height)
if (mid_width > perfect_width)
{
width = mid_width;
real_width = logical_rect.width;
height = logical_rect.height;
pango_layout_set_width (label->layout, mid_width);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
if (logical_rect.height <= height)
width = mid_width;
}
}
}
}
pango_layout_set_width (label->layout, width);
}
pango_layout_set_width (label->layout, width);
rwidth += PANGO_PIXELS (real_width);
rheight += PANGO_PIXELS (height);
}
else /* !label->wrap */
pango_layout_set_width (label->layout, -1);
}
else /* !label->wrap */
{
pango_layout_set_width (label->layout, -1);
pango_layout_get_extents (label->layout, NULL, &logical_rect);
rwidth += PANGO_PIXELS (logical_rect.width);
rheight += PANGO_PIXELS (logical_rect.height);
}
if (widthp)
*widthp = rwidth;
if (heightp)
*heightp = rheight;
}
static void
@ -1492,13 +1434,44 @@ gtk_label_size_request (GtkWidget *widget,
{
GtkLabel *label;
gint width, height;
PangoRectangle logical_rect;
GtkWidgetAuxInfo *aux_info;
g_return_if_fail (GTK_IS_LABEL (widget));
g_return_if_fail (requisition != NULL);
label = GTK_LABEL (widget);
gtk_label_ensure_layout (label, &width, &height);
/*
* If word wrapping is on, then the height requisition can depend
* on:
*
* - Any width set on the widget via gtk_widget_set_usize().
* - The padding of the widget (xpad, set by gtk_misc_set_padding)
*
* Instead of trying to detect changes to these quantities, if we
* are wrapping, we just rewrap for each size request. Since
* size requisitions are cached by the GTK+ core, this is not
* expensive.
*/
if (label->wrap)
gtk_label_clear_layout (label);
gtk_label_ensure_layout (label);
width = label->misc.xpad * 2;
height = label->misc.ypad * 2;
pango_layout_get_extents (label->layout, NULL, &logical_rect);
aux_info = _gtk_widget_get_aux_info (widget, FALSE);
if (label->wrap && aux_info && aux_info->width > 0)
width += aux_info->width;
else
width += PANGO_PIXELS (logical_rect.width);
height += PANGO_PIXELS (logical_rect.height);
requisition->width = width;
requisition->height = height;
@ -1658,7 +1631,7 @@ gtk_label_draw_cursor (GtkLabel *label, gint xoffset, gint yoffset)
widget_direction = gtk_widget_get_direction (widget);
gtk_label_ensure_layout (label, NULL, NULL);
gtk_label_ensure_layout (label);
pango_layout_get_cursor_pos (label->layout, label->select_info->selection_end,
&strong_pos, &weak_pos);
@ -1726,7 +1699,7 @@ gtk_label_expose (GtkWidget *widget,
label = GTK_LABEL (widget);
gtk_label_ensure_layout (label, NULL, NULL);
gtk_label_ensure_layout (label);
if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget) &&
label->text && (*label->text != '\0'))
@ -2095,7 +2068,7 @@ get_layout_index (GtkLabel *label,
*index = 0;
gtk_label_ensure_layout (label, NULL, NULL);
gtk_label_ensure_layout (label);
window_to_layout_coords (label, &x, &y);
@ -2620,7 +2593,7 @@ gtk_label_get_layout (GtkLabel *label)
{
g_return_val_if_fail (GTK_IS_LABEL (label), NULL);
gtk_label_ensure_layout (label, NULL, NULL);
gtk_label_ensure_layout (label);
return label->layout;
}
@ -2754,7 +2727,7 @@ get_better_cursor (GtkLabel *label,
"gtk-split-cursor", &split_cursor,
NULL);
gtk_label_ensure_layout (label, NULL, NULL);
gtk_label_ensure_layout (label);
pango_layout_get_cursor_pos (label->layout, index,
&strong_pos, &weak_pos);
@ -2794,7 +2767,7 @@ gtk_label_move_logically (GtkLabel *label,
gint n_attrs;
gint length;
gtk_label_ensure_layout (label, NULL, NULL);
gtk_label_ensure_layout (label);
length = g_utf8_strlen (label->label, -1);
@ -2838,7 +2811,7 @@ gtk_label_move_visually (GtkLabel *label,
gboolean split_cursor;
gboolean strong;
gtk_label_ensure_layout (label, NULL, NULL);
gtk_label_ensure_layout (label);
g_object_get (gtk_widget_get_settings (GTK_WIDGET (label)),
"gtk-split-cursor", &split_cursor,
@ -2892,7 +2865,7 @@ gtk_label_move_forward_word (GtkLabel *label,
PangoLogAttr *log_attrs;
gint n_attrs;
gtk_label_ensure_layout (label, NULL, NULL);
gtk_label_ensure_layout (label);
pango_layout_get_log_attrs (label->layout, &log_attrs, &n_attrs);
@ -2923,7 +2896,7 @@ gtk_label_move_backward_word (GtkLabel *label,
PangoLogAttr *log_attrs;
gint n_attrs;
gtk_label_ensure_layout (label, NULL, NULL);
gtk_label_ensure_layout (label);
pango_layout_get_log_attrs (label->layout, &log_attrs, &n_attrs);