/* GTK - The GIMP Toolkit * Copyright (C) 2012 Red Hat, Inc. * * Authors: * - Bastien Nocera * * 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 . */ /* * Modified by the GTK+ Team and others 2012. See the AUTHORS * file for a list of people on the GTK+ Team. See the ChangeLog * files for a list of changes. These files are distributed with * GTK+ at ftp://ftp.gtk.org/pub/gtk/. */ #include "config.h" #include "gtksearchentryprivate.h" #include "gtkaccessibleprivate.h" #include "gtkeditable.h" #include "gtkboxlayout.h" #include "gtkgestureclick.h" #include "gtktextprivate.h" #include "gtkimage.h" #include "gtkintl.h" #include "gtkprivate.h" #include "gtkmarshalers.h" #include "gtkstylecontext.h" #include "gtkeventcontrollerkey.h" #include "gtkwidgetprivate.h" /** * SECTION:gtksearchentry * @Short_description: An entry which shows a search icon * @Title: GtkSearchEntry * * #GtkSearchEntry is an entry widget that has been tailored for use * as a search entry. The main aPI for interacting with a GtkSearchEntry * as entry is the #GtkEditable interface. * * It will show an inactive symbolic “find” icon when the search * entry is empty, and a symbolic “clear” icon when there is text. * Clicking on the “clear” icon will empty the search entry. * * To make filtering appear more reactive, it is a good idea to * not react to every change in the entry text immediately, but * only after a short delay. To support this, #GtkSearchEntry * emits the #GtkSearchEntry::search-changed signal which can * be used instead of the #GtkEditable::changed signal. * * The #GtkSearchEntry::previous-match, #GtkSearchEntry::next-match * and #GtkSearchEntry::stop-search signals can be used to implement * moving between search results and ending the search. * * Often, GtkSearchEntry will be fed events by means of being * placed inside a #GtkSearchBar. If that is not the case, * you can use gtk_search_entry_set_key_capture_widget() to let it * capture key input from another widget. * * # CSS Nodes * * |[ * entry.search * ╰── text * ]| * * GtkSearchEntry has a single CSS node with name entry that carries * a .search style class, and the text node is a child of that. * * # Accessibility * * GtkSearchEntry uses the #GTK_ACCESSIBLE_ROLE_SEARCH_BOX role. */ enum { ACTIVATE, SEARCH_CHANGED, NEXT_MATCH, PREVIOUS_MATCH, STOP_SEARCH, SEARCH_STARTED, LAST_SIGNAL }; enum { PROP_0, PROP_PLACEHOLDER_TEXT, PROP_ACTIVATES_DEFAULT, NUM_PROPERTIES, }; static guint signals[LAST_SIGNAL] = { 0 }; static GParamSpec *props[NUM_PROPERTIES] = { NULL, }; typedef struct _GtkSearchEntryClass GtkSearchEntryClass; struct _GtkSearchEntry { GtkWidget parent; GtkWidget *capture_widget; GtkEventController *capture_widget_controller; GtkWidget *entry; GtkWidget *icon; guint delayed_changed_id; gboolean content_changed; gboolean search_stopped; }; struct _GtkSearchEntryClass { GtkWidgetClass parent_class; void (* activate) (GtkSearchEntry *entry); void (* search_changed) (GtkSearchEntry *entry); void (* next_match) (GtkSearchEntry *entry); void (* previous_match) (GtkSearchEntry *entry); void (* stop_search) (GtkSearchEntry *entry); }; static void gtk_search_entry_editable_init (GtkEditableInterface *iface); static void gtk_search_entry_accessible_init (GtkAccessibleInterface *iface); G_DEFINE_TYPE_WITH_CODE (GtkSearchEntry, gtk_search_entry, GTK_TYPE_WIDGET, G_IMPLEMENT_INTERFACE (GTK_TYPE_ACCESSIBLE, gtk_search_entry_accessible_init) G_IMPLEMENT_INTERFACE (GTK_TYPE_EDITABLE, gtk_search_entry_editable_init)) /* 150 mseconds of delay */ #define DELAYED_TIMEOUT_ID 150 static void text_changed (GtkSearchEntry *entry) { entry->content_changed = TRUE; } static void gtk_search_entry_finalize (GObject *object) { GtkSearchEntry *entry = GTK_SEARCH_ENTRY (object); gtk_editable_finish_delegate (GTK_EDITABLE (entry)); gtk_widget_unparent (gtk_widget_get_first_child (GTK_WIDGET (entry))); g_clear_pointer (&entry->entry, gtk_widget_unparent); g_clear_pointer (&entry->icon, gtk_widget_unparent); if (entry->delayed_changed_id > 0) g_source_remove (entry->delayed_changed_id); gtk_search_entry_set_key_capture_widget (GTK_SEARCH_ENTRY (object), NULL); G_OBJECT_CLASS (gtk_search_entry_parent_class)->finalize (object); } static void gtk_search_entry_stop_search (GtkSearchEntry *entry) { entry->search_stopped = TRUE; } static void gtk_search_entry_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkSearchEntry *entry = GTK_SEARCH_ENTRY (object); const char *text; if (gtk_editable_delegate_set_property (object, prop_id, value, pspec)) { if (prop_id == NUM_PROPERTIES + GTK_EDITABLE_PROP_EDITABLE) { gtk_accessible_update_property (GTK_ACCESSIBLE (entry), GTK_ACCESSIBLE_PROPERTY_READ_ONLY, !g_value_get_boolean (value), -1); } return; } switch (prop_id) { case PROP_PLACEHOLDER_TEXT: text = g_value_get_string (value); gtk_text_set_placeholder_text (GTK_TEXT (entry->entry), text); gtk_accessible_update_property (GTK_ACCESSIBLE (entry), GTK_ACCESSIBLE_PROPERTY_PLACEHOLDER, text, -1); break; case PROP_ACTIVATES_DEFAULT: if (gtk_text_get_activates_default (GTK_TEXT (entry->entry)) != g_value_get_boolean (value)) { gtk_text_set_activates_default (GTK_TEXT (entry->entry), g_value_get_boolean (value)); g_object_notify_by_pspec (object, pspec); } break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); } } static void gtk_search_entry_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkSearchEntry *entry = GTK_SEARCH_ENTRY (object); if (gtk_editable_delegate_get_property (object, prop_id, value, pspec)) return; switch (prop_id) { case PROP_PLACEHOLDER_TEXT: g_value_set_string (value, gtk_text_get_placeholder_text (GTK_TEXT (entry->entry))); break; case PROP_ACTIVATES_DEFAULT: g_value_set_boolean (value, gtk_text_get_activates_default (GTK_TEXT (entry->entry))); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); } } static gboolean gtk_search_entry_grab_focus (GtkWidget *widget) { GtkSearchEntry *entry = GTK_SEARCH_ENTRY (widget); return gtk_text_grab_focus_without_selecting (GTK_TEXT (entry->entry)); } static gboolean gtk_search_entry_mnemonic_activate (GtkWidget *widget, gboolean group_cycling) { GtkSearchEntry *entry = GTK_SEARCH_ENTRY (widget); gtk_widget_grab_focus (entry->entry); return TRUE; } static void gtk_search_entry_class_init (GtkSearchEntryClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass); object_class->finalize = gtk_search_entry_finalize; object_class->get_property = gtk_search_entry_get_property; object_class->set_property = gtk_search_entry_set_property; widget_class->grab_focus = gtk_search_entry_grab_focus; widget_class->focus = gtk_widget_focus_child; widget_class->mnemonic_activate = gtk_search_entry_mnemonic_activate; klass->stop_search = gtk_search_entry_stop_search; props[PROP_PLACEHOLDER_TEXT] = g_param_spec_string ("placeholder-text", P_("Placeholder text"), P_("Show text in the entry when it’s empty and unfocused"), NULL, GTK_PARAM_READWRITE); props[PROP_ACTIVATES_DEFAULT] = g_param_spec_boolean ("activates-default", P_("Activates default"), P_("Whether to activate the default widget (such as the default button in a dialog) when Enter is pressed"), FALSE, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY); g_object_class_install_properties (object_class, NUM_PROPERTIES, props); gtk_editable_install_properties (object_class, NUM_PROPERTIES); /** * GtkSearchEntry::activate: * @self: The widget on which the signal is emitted * * The ::activate signal is forwarded from the * #GtkText::activated signal, which is a keybinding * signal for all forms of the Enter key. */ signals[ACTIVATE] = g_signal_new (I_("activate"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkSearchEntryClass, activate), NULL, NULL, NULL, G_TYPE_NONE, 0); /** * GtkSearchEntry::search-changed: * @entry: the entry on which the signal was emitted * * The #GtkSearchEntry::search-changed signal is emitted with a short * delay of 150 milliseconds after the last change to the entry text. */ signals[SEARCH_CHANGED] = g_signal_new (I_("search-changed"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GtkSearchEntryClass, search_changed), NULL, NULL, NULL, G_TYPE_NONE, 0); /** * GtkSearchEntry::next-match: * @entry: the entry on which the signal was emitted * * The ::next-match signal is a [keybinding signal][GtkSignalAction] * which gets emitted when the user initiates a move to the next match * for the current search string. * * Applications should connect to it, to implement moving between * matches. * * The default bindings for this signal is Ctrl-g. */ signals[NEXT_MATCH] = g_signal_new (I_("next-match"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkSearchEntryClass, next_match), NULL, NULL, NULL, G_TYPE_NONE, 0); /** * GtkSearchEntry::previous-match: * @entry: the entry on which the signal was emitted * * The ::previous-match signal is a [keybinding signal][GtkSignalAction] * which gets emitted when the user initiates a move to the previous match * for the current search string. * * Applications should connect to it, to implement moving between * matches. * * The default bindings for this signal is Ctrl-Shift-g. */ signals[PREVIOUS_MATCH] = g_signal_new (I_("previous-match"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkSearchEntryClass, previous_match), NULL, NULL, NULL, G_TYPE_NONE, 0); /** * GtkSearchEntry::stop-search: * @entry: the entry on which the signal was emitted * * The ::stop-search signal is a [keybinding signal][GtkSignalAction] * which gets emitted when the user stops a search via keyboard input. * * Applications should connect to it, to implement hiding the search * entry in this case. * * The default bindings for this signal is Escape. */ signals[STOP_SEARCH] = g_signal_new (I_("stop-search"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION, G_STRUCT_OFFSET (GtkSearchEntryClass, stop_search), NULL, NULL, NULL, G_TYPE_NONE, 0); /** * GtkSearchEntry::search-started: * @entry: the entry on which the signal was emitted * * The ::search-started signal gets emitted when the user initiated * a search on the entry. */ signals[SEARCH_STARTED] = g_signal_new (I_("search-started"), G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 0); gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_g, GDK_CONTROL_MASK, "next-match", NULL); gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_g, GDK_SHIFT_MASK | GDK_CONTROL_MASK, "previous-match", NULL); gtk_widget_class_add_binding_signal (widget_class, GDK_KEY_Escape, 0, "stop-search", NULL); gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BOX_LAYOUT); gtk_widget_class_set_css_name (widget_class, I_("entry")); gtk_widget_class_set_accessible_role (widget_class, GTK_ACCESSIBLE_ROLE_SEARCH_BOX); } static GtkEditable * gtk_search_entry_get_delegate (GtkEditable *editable) { return GTK_EDITABLE (GTK_SEARCH_ENTRY (editable)->entry); } static void gtk_search_entry_editable_init (GtkEditableInterface *iface) { iface->get_delegate = gtk_search_entry_get_delegate; } static gboolean gtk_search_entry_accessible_get_platform_state (GtkAccessible *self, GtkAccessiblePlatformState state) { GtkSearchEntry *entry = GTK_SEARCH_ENTRY (self); switch (state) { case GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSABLE: return gtk_widget_get_focusable (GTK_WIDGET (entry->entry)); case GTK_ACCESSIBLE_PLATFORM_STATE_FOCUSED: return gtk_widget_has_focus (GTK_WIDGET (entry->entry)); default: g_assert_not_reached (); } } static void gtk_search_entry_accessible_init (GtkAccessibleInterface *iface) { GtkAccessibleInterface *parent_iface = g_type_interface_peek_parent (iface); iface->get_at_context = parent_iface->get_at_context; iface->get_platform_state = gtk_search_entry_accessible_get_platform_state; } static void gtk_search_entry_icon_release (GtkGestureClick *press, int n_press, double x, double y, GtkSearchEntry *entry) { gtk_editable_set_text (GTK_EDITABLE (entry->entry), ""); } static gboolean gtk_search_entry_changed_timeout_cb (gpointer user_data) { GtkSearchEntry *entry = user_data; g_signal_emit (entry, signals[SEARCH_CHANGED], 0); entry->delayed_changed_id = 0; return G_SOURCE_REMOVE; } static void reset_timeout (GtkSearchEntry *entry) { if (entry->delayed_changed_id > 0) g_source_remove (entry->delayed_changed_id); entry->delayed_changed_id = g_timeout_add (DELAYED_TIMEOUT_ID, gtk_search_entry_changed_timeout_cb, entry); g_source_set_name_by_id (entry->delayed_changed_id, "[gtk] gtk_search_entry_changed_timeout_cb"); } static void gtk_search_entry_changed (GtkEditable *editable, GtkSearchEntry *entry) { const char *str; /* Update the icons first */ str = gtk_editable_get_text (GTK_EDITABLE (entry->entry)); if (str == NULL || *str == '\0') { gtk_widget_set_child_visible (entry->icon, FALSE); if (entry->delayed_changed_id > 0) { g_source_remove (entry->delayed_changed_id); entry->delayed_changed_id = 0; } g_signal_emit (entry, signals[SEARCH_CHANGED], 0); } else { gtk_widget_set_child_visible (entry->icon, TRUE); /* Queue up the timeout */ reset_timeout (entry); } } static void notify_cb (GObject *object, GParamSpec *pspec, gpointer data) { /* The editable interface properties are already forwarded by the editable delegate setup */ if (g_str_equal (pspec->name, "placeholder-text") || g_str_equal (pspec->name, "activates-default")) g_object_notify (data, pspec->name); } static void activate_cb (GtkText *text, gpointer data) { g_signal_emit (data, signals[ACTIVATE], 0); } static void gtk_search_entry_init (GtkSearchEntry *entry) { GtkWidget *icon; GtkGesture *press; /* The search icon is purely presentational */ icon = g_object_new (GTK_TYPE_IMAGE, "accessible-role", GTK_ACCESSIBLE_ROLE_PRESENTATION, "icon-name", "system-search-symbolic", NULL); gtk_widget_set_parent (icon, GTK_WIDGET (entry)); entry->entry = gtk_text_new (); gtk_widget_set_parent (entry->entry, GTK_WIDGET (entry)); gtk_widget_set_hexpand (entry->entry, TRUE); gtk_editable_init_delegate (GTK_EDITABLE (entry)); g_signal_connect_swapped (entry->entry, "changed", G_CALLBACK (text_changed), entry); g_signal_connect_after (entry->entry, "changed", G_CALLBACK (gtk_search_entry_changed), entry); g_signal_connect_swapped (entry->entry, "preedit-changed", G_CALLBACK (text_changed), entry); g_signal_connect (entry->entry, "notify", G_CALLBACK (notify_cb), entry); g_signal_connect (entry->entry, "activate", G_CALLBACK (activate_cb), entry); entry->icon = g_object_new (GTK_TYPE_IMAGE, "accessible-role", GTK_ACCESSIBLE_ROLE_PRESENTATION, "icon-name", "edit-clear-symbolic", NULL); gtk_widget_set_tooltip_text (entry->icon, _("Clear entry")); gtk_widget_set_parent (entry->icon, GTK_WIDGET (entry)); gtk_widget_set_child_visible (entry->icon, FALSE); press = gtk_gesture_click_new (); g_signal_connect (press, "released", G_CALLBACK (gtk_search_entry_icon_release), entry); gtk_widget_add_controller (entry->icon, GTK_EVENT_CONTROLLER (press)); gtk_widget_add_css_class (GTK_WIDGET (entry), I_("search")); } /** * gtk_search_entry_new: * * Creates a #GtkSearchEntry, with a find icon when the search field is * empty, and a clear icon when it isn't. * * Returns: a new #GtkSearchEntry */ GtkWidget * gtk_search_entry_new (void) { return GTK_WIDGET (g_object_new (GTK_TYPE_SEARCH_ENTRY, NULL)); } gboolean gtk_search_entry_is_keynav (guint keyval, GdkModifierType state) { if (keyval == GDK_KEY_Tab || keyval == GDK_KEY_KP_Tab || keyval == GDK_KEY_Up || keyval == GDK_KEY_KP_Up || keyval == GDK_KEY_Down || keyval == GDK_KEY_KP_Down || keyval == GDK_KEY_Left || keyval == GDK_KEY_KP_Left || keyval == GDK_KEY_Right || keyval == GDK_KEY_KP_Right || keyval == GDK_KEY_Home || keyval == GDK_KEY_KP_Home || keyval == GDK_KEY_End || keyval == GDK_KEY_KP_End || keyval == GDK_KEY_Page_Up || keyval == GDK_KEY_KP_Page_Up || keyval == GDK_KEY_Page_Down || keyval == GDK_KEY_KP_Page_Down || ((state & (GDK_CONTROL_MASK | GDK_ALT_MASK)) != 0)) return TRUE; /* Other navigation events should get automatically * ignored as they will not change the content of the entry */ return FALSE; } static gboolean capture_widget_key_handled (GtkEventControllerKey *controller, guint keyval, guint keycode, GdkModifierType state, GtkWidget *widget) { GtkSearchEntry *entry = GTK_SEARCH_ENTRY (widget); gboolean handled, was_empty; if (gtk_search_entry_is_keynav (keyval, state) || keyval == GDK_KEY_space || keyval == GDK_KEY_Menu) return FALSE; entry->content_changed = FALSE; entry->search_stopped = FALSE; was_empty = (gtk_text_get_text_length (GTK_TEXT (entry->entry)) == 0); handled = gtk_event_controller_key_forward (controller, entry->entry); if (handled) { if (was_empty && entry->content_changed && !entry->search_stopped) g_signal_emit (entry, signals[SEARCH_STARTED], 0); return GDK_EVENT_STOP; } return GDK_EVENT_PROPAGATE; } /** * gtk_search_entry_set_key_capture_widget: * @entry: a #GtkSearchEntry * @widget: (nullable) (transfer none): a #GtkWidget * * Sets @widget as the widget that @entry will capture key events from. * * Key events are consumed by the search entry to start or * continue a search. * * If the entry is part of a #GtkSearchBar, it is preferable * to call gtk_search_bar_set_key_capture_widget() instead, which * will reveal the entry in addition to triggering the search entry. * * Note that despite the name of this function, the events * are only 'captured' in the bubble phase, which means that * editable child widgets of @widget will receive text input * before it gets captured. If that is not desired, you can * capture and forward the events yourself with * gtk_event_controller_key_forward(). **/ void gtk_search_entry_set_key_capture_widget (GtkSearchEntry *entry, GtkWidget *widget) { g_return_if_fail (GTK_IS_SEARCH_ENTRY (entry)); g_return_if_fail (!widget || GTK_IS_WIDGET (widget)); if (entry->capture_widget) { gtk_widget_remove_controller (entry->capture_widget, entry->capture_widget_controller); g_object_remove_weak_pointer (G_OBJECT (entry->capture_widget), (gpointer *) &entry->capture_widget); } entry->capture_widget = widget; if (widget) { g_object_add_weak_pointer (G_OBJECT (entry->capture_widget), (gpointer *) &entry->capture_widget); entry->capture_widget_controller = gtk_event_controller_key_new (); gtk_event_controller_set_propagation_phase (entry->capture_widget_controller, GTK_PHASE_BUBBLE); g_signal_connect (entry->capture_widget_controller, "key-pressed", G_CALLBACK (capture_widget_key_handled), entry); g_signal_connect (entry->capture_widget_controller, "key-released", G_CALLBACK (capture_widget_key_handled), entry); gtk_widget_add_controller (widget, entry->capture_widget_controller); } } /** * gtk_search_entry_get_key_capture_widget: * @entry: a #GtkSearchEntry * * Gets the widget that @entry is capturing key events from. * * Returns: (transfer none): The key capture widget. **/ GtkWidget * gtk_search_entry_get_key_capture_widget (GtkSearchEntry *entry) { g_return_val_if_fail (GTK_IS_SEARCH_ENTRY (entry), NULL); return entry->capture_widget; } GtkEventController * gtk_search_entry_get_key_controller (GtkSearchEntry *entry) { return gtk_text_get_key_controller (GTK_TEXT (entry->entry)); } GtkText * gtk_search_entry_get_text_widget (GtkSearchEntry *entry) { return GTK_TEXT (entry->entry); }