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-rw-r--r--app/widgets/gtkhwrapbox.c607
1 files changed, 607 insertions, 0 deletions
diff --git a/app/widgets/gtkhwrapbox.c b/app/widgets/gtkhwrapbox.c
new file mode 100644
index 0000000..18b2ff4
--- /dev/null
+++ b/app/widgets/gtkhwrapbox.c
@@ -0,0 +1,607 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
+ *
+ * GtkHWrapBox: Horizontal wrapping box widget
+ * Copyright (C) 1999 Tim Janik
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library. If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#undef GSEAL_ENABLE
+#undef GTK_DISABLE_DEPRECATED
+
+#include "gtkhwrapbox.h"
+
+#include "libgimpmath/gimpmath.h"
+
+
+/* --- prototypes --- */
+static void gtk_hwrap_box_class_init (GtkHWrapBoxClass *klass);
+static void gtk_hwrap_box_init (GtkHWrapBox *hwbox);
+static void gtk_hwrap_box_size_request (GtkWidget *widget,
+ GtkRequisition *requisition);
+static void gtk_hwrap_box_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation);
+static GSList* reverse_list_row_children (GtkWrapBox *wbox,
+ GtkWrapBoxChild **child_p,
+ GtkAllocation *area,
+ guint *max_height,
+ gboolean *can_vexpand);
+
+
+/* --- variables --- */
+static gpointer parent_class = NULL;
+
+
+/* --- functions --- */
+GType
+gtk_hwrap_box_get_type (void)
+{
+ static GType hwrap_box_type = 0;
+
+ if (! hwrap_box_type)
+ {
+ const GTypeInfo hwrap_box_info =
+ {
+ sizeof (GtkHWrapBoxClass),
+ NULL, /* base_init */
+ NULL, /* base_finalize */
+ (GClassInitFunc) gtk_hwrap_box_class_init,
+ NULL, /* class_finalize */
+ NULL, /* class_data */
+ sizeof (GtkHWrapBox),
+ 0, /* n_preallocs */
+ (GInstanceInitFunc) gtk_hwrap_box_init,
+ };
+
+ hwrap_box_type = g_type_register_static (GTK_TYPE_WRAP_BOX, "GtkHWrapBox",
+ &hwrap_box_info, 0);
+ }
+
+ return hwrap_box_type;
+}
+
+static void
+gtk_hwrap_box_class_init (GtkHWrapBoxClass *class)
+{
+ GtkWidgetClass *widget_class;
+ GtkWrapBoxClass *wrap_box_class;
+
+ widget_class = GTK_WIDGET_CLASS (class);
+ wrap_box_class = GTK_WRAP_BOX_CLASS (class);
+
+ parent_class = g_type_class_peek_parent (class);
+
+ widget_class->size_request = gtk_hwrap_box_size_request;
+ widget_class->size_allocate = gtk_hwrap_box_size_allocate;
+
+ wrap_box_class->rlist_line_children = reverse_list_row_children;
+}
+
+static void
+gtk_hwrap_box_init (GtkHWrapBox *hwbox)
+{
+ hwbox->max_child_width = 0;
+ hwbox->max_child_height = 0;
+}
+
+GtkWidget*
+gtk_hwrap_box_new (gboolean homogeneous)
+{
+ return g_object_new (GTK_TYPE_HWRAP_BOX, "homogeneous", homogeneous, NULL);
+}
+
+static inline void
+get_child_requisition (GtkWrapBox *wbox,
+ GtkWidget *child,
+ GtkRequisition *child_requisition)
+{
+ if (wbox->homogeneous)
+ {
+ GtkHWrapBox *hwbox = GTK_HWRAP_BOX (wbox);
+
+ child_requisition->width = hwbox->max_child_width;
+ child_requisition->height = hwbox->max_child_height;
+ }
+ else
+ gtk_widget_get_child_requisition (child, child_requisition);
+}
+
+static gfloat
+get_layout_size (GtkHWrapBox *this,
+ guint max_width,
+ guint *width_inc)
+{
+ GtkWrapBox *wbox = GTK_WRAP_BOX (this);
+ GtkWrapBoxChild *child;
+ guint n_rows, left_over = 0, total_height = 0;
+ gboolean last_row_filled = TRUE;
+
+ *width_inc = this->max_child_width + 1;
+
+ n_rows = 0;
+ for (child = wbox->children; child; child = child->next)
+ {
+ GtkWrapBoxChild *row_child;
+ GtkRequisition child_requisition;
+ guint row_width, row_height, n = 1;
+
+ if (!GTK_WIDGET_VISIBLE (child->widget))
+ continue;
+
+ get_child_requisition (wbox, child->widget, &child_requisition);
+ if (!last_row_filled)
+ *width_inc = MIN (*width_inc, child_requisition.width - left_over);
+ row_width = child_requisition.width;
+ row_height = child_requisition.height;
+ for (row_child = child->next; row_child && n < wbox->child_limit; row_child = row_child->next)
+ {
+ if (GTK_WIDGET_VISIBLE (row_child->widget))
+ {
+ get_child_requisition (wbox, row_child->widget, &child_requisition);
+ if (row_width + wbox->hspacing + child_requisition.width > max_width)
+ break;
+ row_width += wbox->hspacing + child_requisition.width;
+ row_height = MAX (row_height, child_requisition.height);
+ n++;
+ }
+ child = row_child;
+ }
+ last_row_filled = n >= wbox->child_limit;
+ left_over = last_row_filled ? 0 : max_width - (row_width + wbox->hspacing);
+ total_height += (n_rows ? wbox->vspacing : 0) + row_height;
+ n_rows++;
+ }
+
+ if (*width_inc > this->max_child_width)
+ *width_inc = 0;
+
+ return MAX (total_height, 1);
+}
+
+static void
+gtk_hwrap_box_size_request (GtkWidget *widget,
+ GtkRequisition *requisition)
+{
+ GtkHWrapBox *this = GTK_HWRAP_BOX (widget);
+ GtkWrapBox *wbox = GTK_WRAP_BOX (widget);
+ GtkWrapBoxChild *child;
+ gfloat ratio_dist, layout_width = 0;
+ guint row_inc = 0;
+
+ g_return_if_fail (requisition != NULL);
+
+ requisition->width = 0;
+ requisition->height = 0;
+ this->max_child_width = 0;
+ this->max_child_height = 0;
+
+ /* size_request all children */
+ for (child = wbox->children; child; child = child->next)
+ if (GTK_WIDGET_VISIBLE (child->widget))
+ {
+ GtkRequisition child_requisition;
+
+ gtk_widget_size_request (child->widget, &child_requisition);
+
+ this->max_child_width = MAX (this->max_child_width, child_requisition.width);
+ this->max_child_height = MAX (this->max_child_height, child_requisition.height);
+ }
+
+ /* figure all possible layouts */
+ ratio_dist = 32768;
+ layout_width = this->max_child_width;
+ do
+ {
+ gfloat layout_height;
+ gfloat ratio, dist;
+
+ layout_width += row_inc;
+ layout_height = get_layout_size (this, layout_width, &row_inc);
+ ratio = layout_width / layout_height; /*<h2v-skip>*/
+ dist = MAX (ratio, wbox->aspect_ratio) - MIN (ratio, wbox->aspect_ratio);
+ if (dist < ratio_dist)
+ {
+ ratio_dist = dist;
+ requisition->width = layout_width;
+ requisition->height = layout_height;
+ }
+
+ /* g_print ("ratio for width %d height %d = %f\n",
+ (gint) layout_width,
+ (gint) layout_height,
+ ratio);
+ */
+ }
+ while (row_inc);
+
+ requisition->width += GTK_CONTAINER (wbox)->border_width * 2; /*<h2v-skip>*/
+ requisition->height += GTK_CONTAINER (wbox)->border_width * 2; /*<h2v-skip>*/
+ /* g_print ("chosen: width %d, height %d\n",
+ requisition->width,
+ requisition->height);
+ */
+}
+
+static GSList*
+reverse_list_row_children (GtkWrapBox *wbox,
+ GtkWrapBoxChild **child_p,
+ GtkAllocation *area,
+ guint *max_child_size,
+ gboolean *expand_line)
+{
+ GSList *slist = NULL;
+ guint width = 0, row_width = area->width;
+ GtkWrapBoxChild *child = *child_p;
+
+ *max_child_size = 0;
+ *expand_line = FALSE;
+
+ while (child && !GTK_WIDGET_VISIBLE (child->widget))
+ {
+ *child_p = child->next;
+ child = *child_p;
+ }
+
+ if (child)
+ {
+ GtkRequisition child_requisition;
+ guint n = 1;
+
+ get_child_requisition (wbox, child->widget, &child_requisition);
+ width += child_requisition.width;
+ *max_child_size = MAX (*max_child_size, child_requisition.height);
+ *expand_line |= child->vexpand;
+ slist = g_slist_prepend (slist, child);
+ *child_p = child->next;
+ child = *child_p;
+
+ while (child && n < wbox->child_limit)
+ {
+ if (GTK_WIDGET_VISIBLE (child->widget))
+ {
+ get_child_requisition (wbox, child->widget, &child_requisition);
+ if (width + wbox->hspacing + child_requisition.width > row_width ||
+ child->wrapped)
+ break;
+ width += wbox->hspacing + child_requisition.width;
+ *max_child_size = MAX (*max_child_size, child_requisition.height);
+ *expand_line |= child->vexpand;
+ slist = g_slist_prepend (slist, child);
+ n++;
+ }
+ *child_p = child->next;
+ child = *child_p;
+ }
+ }
+
+ return slist;
+}
+
+static void
+layout_row (GtkWrapBox *wbox,
+ GtkAllocation *area,
+ GSList *children,
+ guint children_per_line,
+ gboolean vexpand)
+{
+ GSList *slist;
+ guint n_children = 0, n_expand_children = 0, have_expand_children = 0;
+ gint total_width = 0;
+ gfloat x, width, extra;
+ GtkAllocation child_allocation;
+
+ for (slist = children; slist; slist = slist->next)
+ {
+ GtkWrapBoxChild *child = slist->data;
+ GtkRequisition child_requisition;
+
+ n_children++;
+ if (child->hexpand)
+ n_expand_children++;
+
+ get_child_requisition (wbox, child->widget, &child_requisition);
+ total_width += child_requisition.width;
+ }
+
+ width = MAX (1, area->width - (n_children - 1) * wbox->hspacing);
+ if (width > total_width)
+ extra = width - total_width;
+ else
+ extra = 0;
+ have_expand_children = n_expand_children && extra;
+
+ x = area->x;
+ if (wbox->homogeneous)
+ {
+ width = MAX (1, area->width - (children_per_line - 1) * wbox->hspacing);
+ width /= ((gdouble) children_per_line);
+ extra = 0;
+ }
+ else if (have_expand_children && wbox->justify != GTK_JUSTIFY_FILL)
+ {
+ width = extra;
+ extra /= ((gdouble) n_expand_children);
+ }
+ else
+ {
+ if (wbox->justify == GTK_JUSTIFY_FILL)
+ {
+ width = extra;
+ have_expand_children = TRUE;
+ n_expand_children = n_children;
+ extra /= ((gdouble) n_expand_children);
+ }
+ else if (wbox->justify == GTK_JUSTIFY_CENTER)
+ {
+ x += extra / 2;
+ width = 0;
+ extra = 0;
+ }
+ else if (wbox->justify == GTK_JUSTIFY_LEFT)
+ {
+ width = 0;
+ extra = 0;
+ }
+ else if (wbox->justify == GTK_JUSTIFY_RIGHT)
+ {
+ x += extra;
+ width = 0;
+ extra = 0;
+ }
+ }
+
+ n_children = 0;
+ for (slist = children; slist; slist = slist->next)
+ {
+ GtkWrapBoxChild *child = slist->data;
+
+ child_allocation.x = x;
+ child_allocation.y = area->y;
+ if (wbox->homogeneous)
+ {
+ child_allocation.height = area->height;
+ child_allocation.width = width;
+ x += child_allocation.width + wbox->hspacing;
+ }
+ else
+ {
+ GtkRequisition child_requisition;
+
+ get_child_requisition (wbox, child->widget, &child_requisition);
+
+ if (child_requisition.height >= area->height)
+ child_allocation.height = area->height;
+ else
+ {
+ child_allocation.height = child_requisition.height;
+ if (wbox->line_justify == GTK_JUSTIFY_FILL || child->vfill)
+ child_allocation.height = area->height;
+ else if (child->vexpand || wbox->line_justify == GTK_JUSTIFY_CENTER)
+ child_allocation.y += (area->height - child_requisition.height) / 2;
+ else if (wbox->line_justify == GTK_JUSTIFY_BOTTOM)
+ child_allocation.y += area->height - child_requisition.height;
+ }
+
+ if (have_expand_children)
+ {
+ child_allocation.width = child_requisition.width;
+ if (child->hexpand || wbox->justify == GTK_JUSTIFY_FILL)
+ {
+ guint space;
+
+ n_expand_children--;
+ space = extra * n_expand_children;
+ space = width - space;
+ width -= space;
+ if (child->hfill)
+ child_allocation.width += space;
+ else
+ {
+ child_allocation.x += space / 2;
+ x += space;
+ }
+ }
+ }
+ else
+ {
+ /* g_print ("child_allocation.x %d += %d * %f ",
+ child_allocation.x, n_children, extra); */
+ child_allocation.x += n_children * extra;
+ /* g_print ("= %d\n",
+ child_allocation.x); */
+ child_allocation.width = MIN (child_requisition.width,
+ area->width - child_allocation.x + area->x);
+ }
+ }
+
+ x += child_allocation.width + wbox->hspacing;
+ gtk_widget_size_allocate (child->widget, &child_allocation);
+ n_children++;
+ }
+}
+
+typedef struct _Line Line;
+struct _Line
+{
+ GSList *children;
+ guint16 min_size;
+ guint expand : 1;
+ Line *next;
+};
+
+static void
+layout_rows (GtkWrapBox *wbox,
+ GtkAllocation *area)
+{
+ GtkWrapBoxChild *next_child;
+ guint min_height;
+ gboolean vexpand;
+ GSList *slist;
+ Line *line_list = NULL;
+ guint total_height = 0, n_expand_lines = 0, n_lines = 0;
+ gfloat shrink_height;
+ guint children_per_line;
+
+ next_child = wbox->children;
+ slist = GTK_WRAP_BOX_GET_CLASS (wbox)->rlist_line_children (wbox,
+ &next_child,
+ area,
+ &min_height,
+ &vexpand);
+ slist = g_slist_reverse (slist);
+
+ children_per_line = g_slist_length (slist);
+ while (slist)
+ {
+ Line *line = g_slice_new (Line);
+
+ line->children = slist;
+ line->min_size = min_height;
+ total_height += min_height;
+ line->expand = vexpand;
+ if (vexpand)
+ n_expand_lines++;
+ line->next = line_list;
+ line_list = line;
+ n_lines++;
+
+ slist = GTK_WRAP_BOX_GET_CLASS (wbox)->rlist_line_children (wbox,
+ &next_child,
+ area,
+ &min_height,
+ &vexpand);
+ slist = g_slist_reverse (slist);
+ }
+
+ if (total_height > area->height)
+ shrink_height = total_height - area->height;
+ else
+ shrink_height = 0;
+
+ if (1) /* reverse lines and shrink */
+ {
+ Line *prev = NULL, *last = NULL;
+ gfloat n_shrink_lines = n_lines;
+
+ while (line_list)
+ {
+ Line *tmp = line_list->next;
+
+ if (shrink_height)
+ {
+ Line *line = line_list;
+ guint shrink_fract = shrink_height / n_shrink_lines + 0.5;
+
+ if (line->min_size > shrink_fract)
+ {
+ shrink_height -= shrink_fract;
+ line->min_size -= shrink_fract;
+ }
+ else
+ {
+ shrink_height -= line->min_size - 1;
+ line->min_size = 1;
+ }
+ }
+ n_shrink_lines--;
+
+ last = line_list;
+ line_list->next = prev;
+ prev = line_list;
+ line_list = tmp;
+ }
+ line_list = last;
+ }
+
+ if (n_lines)
+ {
+ Line *line;
+ gfloat y, height, extra = 0;
+
+ height = area->height;
+ height = MAX (n_lines, height - (n_lines - 1) * wbox->vspacing);
+
+ if (wbox->homogeneous)
+ height /= ((gdouble) n_lines);
+ else if (n_expand_lines)
+ {
+ height = MAX (0, height - total_height);
+ extra = height / ((gdouble) n_expand_lines);
+ }
+ else
+ height = 0;
+
+ y = area->y;
+ line = line_list;
+ while (line)
+ {
+ GtkAllocation row_allocation;
+ Line *next_line = line->next;
+
+ row_allocation.x = area->x;
+ row_allocation.width = area->width;
+ if (wbox->homogeneous)
+ row_allocation.height = height;
+ else
+ {
+ row_allocation.height = line->min_size;
+
+ if (line->expand)
+ row_allocation.height += extra;
+ }
+
+ row_allocation.y = y;
+
+ y += row_allocation.height + wbox->vspacing;
+ layout_row (wbox,
+ &row_allocation,
+ line->children,
+ children_per_line,
+ line->expand);
+
+ g_slist_free (line->children);
+ line = next_line;
+ }
+
+ g_slice_free_chain (Line, line_list, next);
+ }
+}
+
+static void
+gtk_hwrap_box_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ GtkWrapBox *wbox = GTK_WRAP_BOX (widget);
+ GtkAllocation area;
+ gint border = GTK_CONTAINER (wbox)->border_width; /*<h2v-skip>*/
+
+ widget->allocation = *allocation;
+ area.x = allocation->x + border;
+ area.y = allocation->y + border;
+ area.width = MAX (1, (gint) allocation->width - border * 2);
+ area.height = MAX (1, (gint) allocation->height - border * 2);
+
+ /*<h2v-off>*/
+ /* g_print ("got: width %d, height %d\n",
+ allocation->width,
+ allocation->height);
+ */
+ /*<h2v-on>*/
+
+ layout_rows (wbox, &area);
+}
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