/* GTK - The GIMP Toolkit * Copyright © 2012 Carlos Garnacho * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see . */ #include "config.h" #include "gtkprivatetypebuiltins.h" #include "gtktexthandleprivate.h" #include "gtkmarshalers.h" #include "gtkprivate.h" #include "gtkwindowprivate.h" #include "gtkcssnodeprivate.h" #include "gtkwidgetprivate.h" #include "gtkgizmoprivate.h" #include "gtkrendericonprivate.h" #include "gtkintl.h" #include typedef struct _GtkTextHandlePrivate GtkTextHandlePrivate; typedef struct _HandleWindow HandleWindow; enum { DRAG_STARTED, HANDLE_DRAGGED, DRAG_FINISHED, LAST_SIGNAL }; enum { PROP_0, PROP_PARENT }; struct _HandleWindow { GtkWidget *widget; GdkRectangle pointing_to; GtkBorder border; gint dx; gint dy; GtkTextDirection dir; guint dragged : 1; guint mode_visible : 1; guint user_visible : 1; guint has_point : 1; }; struct _GtkTextHandlePrivate { HandleWindow windows[2]; GtkWidget *toplevel; GtkWidget *parent; GtkScrollable *parent_scrollable; GtkAdjustment *vadj; GtkAdjustment *hadj; guint hierarchy_changed_id; guint scrollable_notify_id; guint mode : 2; }; G_DEFINE_TYPE_WITH_PRIVATE (GtkTextHandle, _gtk_text_handle, G_TYPE_OBJECT) static guint signals[LAST_SIGNAL] = { 0 }; static void _gtk_text_handle_update (GtkTextHandle *handle, GtkTextHandlePosition pos); static void _gtk_text_handle_get_size (GtkTextHandle *handle, GtkTextHandlePosition pos, gint *width, gint *height) { GtkTextHandlePrivate *priv = handle->priv; GtkWidget *widget = priv->windows[pos].widget; GtkStyleContext *context; context = gtk_widget_get_style_context (widget); gtk_style_context_get (context, "min-width", width, "min-height", height, NULL); } static gint _text_handle_pos_from_widget (GtkTextHandle *handle, GtkWidget *widget) { GtkTextHandlePrivate *priv = handle->priv; if (widget == priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].widget) return GTK_TEXT_HANDLE_POSITION_SELECTION_START; else if (widget == priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].widget) return GTK_TEXT_HANDLE_POSITION_SELECTION_END; else return -1; } static void handle_drag_begin (GtkGestureDrag *gesture, gdouble x, gdouble y, GtkTextHandle *handle) { GtkTextHandlePrivate *priv = handle->priv; GtkWidget *widget; gint pos; widget = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture)); pos = _text_handle_pos_from_widget (handle, widget); if (pos == GTK_TEXT_HANDLE_POSITION_CURSOR && priv->mode == GTK_TEXT_HANDLE_MODE_CURSOR) x -= gtk_widget_get_width (widget) / 2; else if ((pos == GTK_TEXT_HANDLE_POSITION_CURSOR && priv->windows[pos].dir == GTK_TEXT_DIR_RTL) || (pos == GTK_TEXT_HANDLE_POSITION_SELECTION_START && priv->windows[pos].dir != GTK_TEXT_DIR_RTL)) x -= gtk_widget_get_width (widget); y += priv->windows[pos].border.top / 2; priv->windows[pos].dx = x; priv->windows[pos].dy = y; priv->windows[pos].dragged = TRUE; g_signal_emit (handle, signals[DRAG_STARTED], 0, pos); } static void handle_drag_update (GtkGestureDrag *gesture, gdouble offset_x, gdouble offset_y, GtkTextHandle *handle) { GtkTextHandlePrivate *priv = handle->priv; gdouble start_x, start_y; gint pos, x, y; pos = _text_handle_pos_from_widget (handle, gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture))); gtk_gesture_drag_get_start_point (gesture, &start_x, &start_y); gtk_widget_translate_coordinates (priv->windows[pos].widget, priv->parent, start_x + offset_x - priv->windows[pos].dx, start_y + offset_y - priv->windows[pos].dy, &x, &y); g_signal_emit (handle, signals[HANDLE_DRAGGED], 0, pos, x, y); } static void handle_drag_end (GtkGestureDrag *gesture, gdouble offset_x, gdouble offset_y, GtkTextHandle *handle) { GtkTextHandlePrivate *priv = handle->priv; gint pos; pos = _text_handle_pos_from_widget (handle, gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture))); g_signal_emit (handle, signals[DRAG_FINISHED], 0, pos); priv->windows[pos].dragged = FALSE; } static void snapshot_func (GtkGizmo *gizmo, GtkSnapshot *snapshot) { GtkCssStyle *style = gtk_css_node_get_style (gtk_widget_get_css_node (GTK_WIDGET (gizmo))); gtk_css_style_snapshot_icon (style, snapshot, gtk_widget_get_width (GTK_WIDGET (gizmo)), gtk_widget_get_height (GTK_WIDGET (gizmo)), GTK_CSS_IMAGE_BUILTIN_HANDLE); } static GtkWidget * _gtk_text_handle_ensure_widget (GtkTextHandle *handle, GtkTextHandlePosition pos) { GtkTextHandlePrivate *priv; priv = handle->priv; if (!priv->windows[pos].widget) { GtkWidget *widget, *window; GtkStyleContext *context; GtkEventController *controller; widget = gtk_gizmo_new (I_("cursor-handle"), NULL, NULL, snapshot_func, NULL); gtk_widget_set_direction (widget, priv->windows[pos].dir); controller = GTK_EVENT_CONTROLLER (gtk_gesture_drag_new ()); g_signal_connect (controller, "drag-begin", G_CALLBACK (handle_drag_begin), handle); g_signal_connect (controller, "drag-update", G_CALLBACK (handle_drag_update), handle); g_signal_connect (controller, "drag-end", G_CALLBACK (handle_drag_end), handle); gtk_widget_add_controller (widget, controller); priv->windows[pos].widget = g_object_ref_sink (widget); priv->toplevel = window = gtk_widget_get_ancestor (priv->parent, GTK_TYPE_WINDOW); _gtk_window_add_popover (GTK_WINDOW (window), widget, priv->parent, FALSE); context = gtk_widget_get_style_context (widget); gtk_style_context_set_parent (context, gtk_widget_get_style_context (priv->parent)); if (pos == GTK_TEXT_HANDLE_POSITION_SELECTION_END) { gtk_style_context_add_class (context, GTK_STYLE_CLASS_BOTTOM); if (priv->mode == GTK_TEXT_HANDLE_MODE_CURSOR) gtk_style_context_add_class (context, GTK_STYLE_CLASS_INSERTION_CURSOR); } else gtk_style_context_add_class (context, GTK_STYLE_CLASS_TOP); } return priv->windows[pos].widget; } static void _handle_update_child_visible (GtkTextHandle *handle, GtkTextHandlePosition pos) { HandleWindow *handle_window; GtkTextHandlePrivate *priv; cairo_rectangle_int_t rect; GtkAllocation allocation; GtkWidget *parent; priv = handle->priv; handle_window = &priv->windows[pos]; if (!priv->parent_scrollable) { gtk_widget_set_child_visible (handle_window->widget, TRUE); return; } parent = gtk_widget_get_parent (GTK_WIDGET (priv->parent_scrollable)); rect = handle_window->pointing_to; gtk_widget_translate_coordinates (priv->parent, parent, rect.x, rect.y, &rect.x, &rect.y); gtk_widget_get_allocation (GTK_WIDGET (parent), &allocation); if (rect.x < 0 || rect.x + rect.width > allocation.width || rect.y < 0 || rect.y + rect.height > allocation.height) gtk_widget_set_child_visible (handle_window->widget, FALSE); else gtk_widget_set_child_visible (handle_window->widget, TRUE); } static void _gtk_text_handle_update (GtkTextHandle *handle, GtkTextHandlePosition pos) { GtkTextHandlePrivate *priv; HandleWindow *handle_window; GtkBorder *border; priv = handle->priv; handle_window = &priv->windows[pos]; border = &handle_window->border; if (!priv->parent || !gtk_widget_is_drawable (priv->parent)) return; if (handle_window->has_point && handle_window->mode_visible && handle_window->user_visible) { cairo_rectangle_int_t rect; gint width, height; GtkWidget *window; GtkAllocation alloc; gint w, h; _gtk_text_handle_ensure_widget (handle, pos); _gtk_text_handle_get_size (handle, pos, &width, &height); border->top = height; border->bottom = height; border->left = width; border->right = width; rect.x = handle_window->pointing_to.x; rect.y = handle_window->pointing_to.y + handle_window->pointing_to.height - handle_window->border.top; rect.width = width; rect.height = 0; _handle_update_child_visible (handle, pos); window = gtk_widget_get_parent (handle_window->widget); gtk_widget_translate_coordinates (priv->parent, window, rect.x, rect.y, &rect.x, &rect.y); if (pos == GTK_TEXT_HANDLE_POSITION_CURSOR && priv->mode == GTK_TEXT_HANDLE_MODE_CURSOR) rect.x -= rect.width / 2; else if ((pos == GTK_TEXT_HANDLE_POSITION_CURSOR && handle_window->dir == GTK_TEXT_DIR_RTL) || (pos == GTK_TEXT_HANDLE_POSITION_SELECTION_START && handle_window->dir != GTK_TEXT_DIR_RTL)) rect.x -= rect.width; /* The goal is to make the window 3 times as wide and high. The handle * will be rendered in the center, making the rest an invisible border. * If we hit the edge of the toplevel, we shrink the border to avoid * mispositioning the handle, if at all possible. This calculation uses * knowledge about how popover_get_rect() works. */ gtk_widget_get_allocation (window, &alloc); w = width + border->left + border->right; h = height + border->top + border->bottom; if (rect.x + rect.width/2 - w/2 < alloc.x) border->left = MAX (0, border->left - (alloc.x - (rect.x + rect.width/2 - w/2))); if (rect.y + rect.height/2 - h/2 < alloc.y) border->top = MAX (0, border->top - (alloc.y - (rect.y + rect.height/2 - h/2))); if (rect.x + rect.width/2 + w/2 > alloc.x + alloc.width) border->right = MAX (0, border->right - (rect.x + rect.width/2 + w/2 - (alloc.x + alloc.width))); if (rect.y + rect.height/2 + h/2 > alloc.y + alloc.height) border->bottom = MAX (0, border->bottom - (rect.y + rect.height/2 + h/2 - (alloc.y + alloc.height))); width += border->left + border->right; height += border->top + border->bottom; gtk_widget_set_size_request (handle_window->widget, width, height); gtk_widget_show (handle_window->widget); _gtk_window_raise_popover (GTK_WINDOW (window), handle_window->widget); _gtk_window_set_popover_position (GTK_WINDOW (window), handle_window->widget, GTK_POS_BOTTOM, &rect); } else if (handle_window->widget) gtk_widget_hide (handle_window->widget); } static void adjustment_changed_cb (GtkAdjustment *adjustment, GtkTextHandle *handle) { _gtk_text_handle_update (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_START); _gtk_text_handle_update (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_END); } static void _gtk_text_handle_set_scrollable (GtkTextHandle *handle, GtkScrollable *scrollable) { GtkTextHandlePrivate *priv; priv = handle->priv; if (priv->vadj) { g_signal_handlers_disconnect_by_data (priv->vadj, handle); g_clear_object (&priv->vadj); } if (priv->hadj) { g_signal_handlers_disconnect_by_data (priv->hadj, handle); g_clear_object (&priv->hadj); } if (priv->parent_scrollable) g_object_remove_weak_pointer (G_OBJECT (priv->parent_scrollable), (gpointer *) &priv->parent_scrollable); priv->parent_scrollable = scrollable; if (scrollable) { g_object_add_weak_pointer (G_OBJECT (priv->parent_scrollable), (gpointer *) &priv->parent_scrollable); priv->vadj = gtk_scrollable_get_vadjustment (scrollable); priv->hadj = gtk_scrollable_get_hadjustment (scrollable); if (priv->vadj) { g_object_ref (priv->vadj); g_signal_connect (priv->vadj, "changed", G_CALLBACK (adjustment_changed_cb), handle); g_signal_connect (priv->vadj, "value-changed", G_CALLBACK (adjustment_changed_cb), handle); } if (priv->hadj) { g_object_ref (priv->hadj); g_signal_connect (priv->hadj, "changed", G_CALLBACK (adjustment_changed_cb), handle); g_signal_connect (priv->hadj, "value-changed", G_CALLBACK (adjustment_changed_cb), handle); } } } static void _gtk_text_handle_scrollable_notify (GObject *object, GParamSpec *pspec, GtkTextHandle *handle) { if (pspec->value_type == GTK_TYPE_ADJUSTMENT) _gtk_text_handle_set_scrollable (handle, GTK_SCROLLABLE (object)); } static void _gtk_text_handle_update_scrollable (GtkTextHandle *handle, GtkScrollable *scrollable) { GtkTextHandlePrivate *priv; priv = handle->priv; if (priv->parent_scrollable == scrollable) return; if (priv->parent_scrollable && priv->scrollable_notify_id && g_signal_handler_is_connected (priv->parent_scrollable, priv->scrollable_notify_id)) g_signal_handler_disconnect (priv->parent_scrollable, priv->scrollable_notify_id); _gtk_text_handle_set_scrollable (handle, scrollable); if (priv->parent_scrollable) priv->scrollable_notify_id = g_signal_connect (priv->parent_scrollable, "notify", G_CALLBACK (_gtk_text_handle_scrollable_notify), handle); } static GtkWidget * gtk_text_handle_lookup_scrollable (GtkTextHandle *handle) { GtkTextHandlePrivate *priv; GtkWidget *scrolled_window; priv = handle->priv; scrolled_window = gtk_widget_get_ancestor (priv->parent, GTK_TYPE_SCROLLED_WINDOW); if (!scrolled_window) return NULL; return gtk_bin_get_child (GTK_BIN (scrolled_window)); } static void _gtk_text_handle_parent_hierarchy_changed (GtkWidget *widget, GParamSpec *pspec, GtkTextHandle *handle) { GtkWidget *toplevel, *scrollable; GtkTextHandlePrivate *priv; priv = handle->priv; toplevel = gtk_widget_get_ancestor (widget, GTK_TYPE_WINDOW); if (priv->toplevel && !toplevel) { if (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].widget) { _gtk_window_remove_popover (GTK_WINDOW (priv->toplevel), priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].widget); g_object_unref (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].widget); priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].widget = NULL; } if (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].widget) { _gtk_window_remove_popover (GTK_WINDOW (priv->toplevel), priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].widget); g_object_unref (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].widget); priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].widget = NULL; } priv->toplevel = NULL; } scrollable = gtk_text_handle_lookup_scrollable (handle); _gtk_text_handle_update_scrollable (handle, GTK_SCROLLABLE (scrollable)); } static void _gtk_text_handle_set_parent (GtkTextHandle *handle, GtkWidget *parent) { GtkTextHandlePrivate *priv; GtkWidget *scrollable = NULL; priv = handle->priv; if (priv->parent == parent) return; if (priv->parent && priv->hierarchy_changed_id && g_signal_handler_is_connected (priv->parent, priv->hierarchy_changed_id)) g_signal_handler_disconnect (priv->parent, priv->hierarchy_changed_id); priv->parent = parent; if (parent) { priv->hierarchy_changed_id = g_signal_connect (parent, "notify::root", G_CALLBACK (_gtk_text_handle_parent_hierarchy_changed), handle); scrollable = gtk_text_handle_lookup_scrollable (handle); } _gtk_text_handle_update_scrollable (handle, GTK_SCROLLABLE (scrollable)); } static void gtk_text_handle_finalize (GObject *object) { GtkTextHandlePrivate *priv; priv = GTK_TEXT_HANDLE (object)->priv; _gtk_text_handle_set_parent (GTK_TEXT_HANDLE (object), NULL); /* We sank the references, unref here */ if (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].widget) g_object_unref (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START].widget); if (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].widget) g_object_unref (priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END].widget); G_OBJECT_CLASS (_gtk_text_handle_parent_class)->finalize (object); } static void gtk_text_handle_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkTextHandle *handle; handle = GTK_TEXT_HANDLE (object); switch (prop_id) { case PROP_PARENT: _gtk_text_handle_set_parent (handle, g_value_get_object (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); } } static void gtk_text_handle_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkTextHandlePrivate *priv; priv = GTK_TEXT_HANDLE (object)->priv; switch (prop_id) { case PROP_PARENT: g_value_set_object (value, priv->parent); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); } } static void _gtk_text_handle_class_init (GtkTextHandleClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); object_class->finalize = gtk_text_handle_finalize; object_class->set_property = gtk_text_handle_set_property; object_class->get_property = gtk_text_handle_get_property; signals[HANDLE_DRAGGED] = g_signal_new (I_("handle-dragged"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkTextHandleClass, handle_dragged), NULL, NULL, _gtk_marshal_VOID__ENUM_INT_INT, G_TYPE_NONE, 3, GTK_TYPE_TEXT_HANDLE_POSITION, G_TYPE_INT, G_TYPE_INT); signals[DRAG_STARTED] = g_signal_new (I_("drag-started"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_VOID__ENUM, G_TYPE_NONE, 1, GTK_TYPE_TEXT_HANDLE_POSITION); signals[DRAG_FINISHED] = g_signal_new (I_("drag-finished"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST, 0, NULL, NULL, g_cclosure_marshal_VOID__ENUM, G_TYPE_NONE, 1, GTK_TYPE_TEXT_HANDLE_POSITION); g_object_class_install_property (object_class, PROP_PARENT, g_param_spec_object ("parent", P_("Parent widget"), P_("Parent widget"), GTK_TYPE_WIDGET, GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY)); } static void _gtk_text_handle_init (GtkTextHandle *handle) { handle->priv = _gtk_text_handle_get_instance_private (handle); } GtkTextHandle * _gtk_text_handle_new (GtkWidget *parent) { return g_object_new (GTK_TYPE_TEXT_HANDLE, "parent", parent, NULL); } void _gtk_text_handle_set_mode (GtkTextHandle *handle, GtkTextHandleMode mode) { GtkTextHandlePrivate *priv; HandleWindow *start, *end; g_return_if_fail (GTK_IS_TEXT_HANDLE (handle)); priv = handle->priv; if (priv->mode == mode) return; priv->mode = mode; start = &priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_START]; end = &priv->windows[GTK_TEXT_HANDLE_POSITION_SELECTION_END]; switch (mode) { case GTK_TEXT_HANDLE_MODE_CURSOR: start->mode_visible = FALSE; /* end = cursor */ end->mode_visible = TRUE; break; case GTK_TEXT_HANDLE_MODE_SELECTION: start->mode_visible = TRUE; end->mode_visible = TRUE; break; case GTK_TEXT_HANDLE_MODE_NONE: default: start->mode_visible = FALSE; end->mode_visible = FALSE; break; } if (end->widget) { if (mode == GTK_TEXT_HANDLE_MODE_CURSOR) gtk_style_context_add_class (gtk_widget_get_style_context (end->widget), GTK_STYLE_CLASS_INSERTION_CURSOR); else gtk_style_context_remove_class (gtk_widget_get_style_context (end->widget), GTK_STYLE_CLASS_INSERTION_CURSOR); } _gtk_text_handle_update (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_START); _gtk_text_handle_update (handle, GTK_TEXT_HANDLE_POSITION_SELECTION_END); if (start->widget && start->mode_visible) gtk_widget_queue_draw (start->widget); if (end->widget && end->mode_visible) gtk_widget_queue_draw (end->widget); } GtkTextHandleMode _gtk_text_handle_get_mode (GtkTextHandle *handle) { GtkTextHandlePrivate *priv; g_return_val_if_fail (GTK_IS_TEXT_HANDLE (handle), GTK_TEXT_HANDLE_MODE_NONE); priv = handle->priv; return priv->mode; } void _gtk_text_handle_set_position (GtkTextHandle *handle, GtkTextHandlePosition pos, GdkRectangle *rect) { GtkTextHandlePrivate *priv; HandleWindow *handle_window; g_return_if_fail (GTK_IS_TEXT_HANDLE (handle)); priv = handle->priv; pos = CLAMP (pos, GTK_TEXT_HANDLE_POSITION_CURSOR, GTK_TEXT_HANDLE_POSITION_SELECTION_START); handle_window = &priv->windows[pos]; if (priv->mode == GTK_TEXT_HANDLE_MODE_NONE || (priv->mode == GTK_TEXT_HANDLE_MODE_CURSOR && pos != GTK_TEXT_HANDLE_POSITION_CURSOR)) return; handle_window->pointing_to = *rect; handle_window->has_point = TRUE; if (gtk_widget_is_visible (priv->parent)) _gtk_text_handle_update (handle, pos); } void _gtk_text_handle_set_visible (GtkTextHandle *handle, GtkTextHandlePosition pos, gboolean visible) { GtkTextHandlePrivate *priv; g_return_if_fail (GTK_IS_TEXT_HANDLE (handle)); priv = handle->priv; pos = CLAMP (pos, GTK_TEXT_HANDLE_POSITION_CURSOR, GTK_TEXT_HANDLE_POSITION_SELECTION_START); priv->windows[pos].user_visible = visible; if (gtk_widget_is_visible (priv->parent)) _gtk_text_handle_update (handle, pos); } gboolean _gtk_text_handle_get_is_dragged (GtkTextHandle *handle, GtkTextHandlePosition pos) { GtkTextHandlePrivate *priv; g_return_val_if_fail (GTK_IS_TEXT_HANDLE (handle), FALSE); priv = handle->priv; pos = CLAMP (pos, GTK_TEXT_HANDLE_POSITION_CURSOR, GTK_TEXT_HANDLE_POSITION_SELECTION_START); return priv->windows[pos].dragged; } void _gtk_text_handle_set_direction (GtkTextHandle *handle, GtkTextHandlePosition pos, GtkTextDirection dir) { GtkTextHandlePrivate *priv; g_return_if_fail (GTK_IS_TEXT_HANDLE (handle)); priv = handle->priv; pos = CLAMP (pos, GTK_TEXT_HANDLE_POSITION_CURSOR, GTK_TEXT_HANDLE_POSITION_SELECTION_START); priv->windows[pos].dir = dir; if (priv->windows[pos].widget) { gtk_widget_set_direction (priv->windows[pos].widget, dir); _gtk_text_handle_update (handle, pos); } }