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[gtk/wip/matthiasc/immodule-cleanup] add a missing file

commit 66ca5e0995e82c34ca8d2c296aee42e8d78a92ed
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Feb 23 15:14:02 2018 -0500

    add a missing file

 gtk/gtkimcontextwayland.c | 623 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 623 insertions(+)
---
diff --git a/gtk/gtkimcontextwayland.c b/gtk/gtkimcontextwayland.c
new file mode 100644
index 0000000000..4666abec01
--- /dev/null
+++ b/gtk/gtkimcontextwayland.c
@@ -0,0 +1,623 @@
+/* GTK - The GIMP Toolkit
+ * Copyright (C) 2017 Red Hat, Inc.
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <string.h>
+#include <wayland-client-protocol.h>
+
+#include <gtk/gtk.h>
+#include "gtk/gtkintl.h"
+#include "gtk/gtkimmodule.h"
+#include "gtk/gtkimcontextwayland.h"
+
+#include "gdk/wayland/gdkwayland.h"
+#include "gtk-text-input-client-protocol.h"
+
+typedef struct _GtkIMContextWaylandGlobal GtkIMContextWaylandGlobal;
+typedef struct _GtkIMContextWayland GtkIMContextWayland;
+typedef struct _GtkIMContextWaylandClass GtkIMContextWaylandClass;
+
+struct _GtkIMContextWaylandGlobal
+{
+  struct wl_display *display;
+  struct wl_registry *registry;
+  struct gtk_text_input_manager *text_input_manager;
+  struct gtk_text_input *text_input;
+  uint32_t enter_serial;
+
+  GtkIMContext *current;
+};
+
+struct _GtkIMContextWaylandClass
+{
+  GtkIMContextSimpleClass parent_class;
+};
+
+struct _GtkIMContextWayland
+{
+  GtkIMContextSimple parent_instance;
+  GtkWidget *widget;
+
+  GtkGesture *gesture;
+  gdouble press_x;
+  gdouble press_y;
+
+  struct {
+    gchar *text;
+    gint cursor_idx;
+  } surrounding;
+
+  struct {
+    gchar *text;
+    gint cursor_idx;
+  } preedit;
+
+  cairo_rectangle_int_t cursor_rect;
+  guint use_preedit : 1;
+};
+
+G_DEFINE_TYPE_WITH_CODE (GtkIMContextWayland, gtk_im_context_wayland, GTK_TYPE_IM_CONTEXT,
+                         g_io_extension_point_implement (GTK_IM_MODULE_EXTENSION_POINT_NAME,
+                                                         g_define_type_id,
+                                                         "wayland",
+                                                         10));
+
+static GtkIMContextWaylandGlobal *global = NULL;
+
+#define GTK_IM_CONTEXT_WAYLAND(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), gtk_im_context_wayland__get_type (), 
GtkIMContextWayland))
+
+static void
+reset_preedit (GtkIMContextWayland *context)
+{
+  g_clear_pointer (&context->preedit.text, g_free);
+  context->preedit.cursor_idx = 0;
+  g_signal_emit_by_name (context, "preedit-changed");
+}
+
+static void
+text_input_enter (void                     *data,
+                  struct gtk_text_input    *text_input,
+                  uint32_t                  serial,
+                  struct wl_surface        *surface)
+{
+  GtkIMContextWaylandGlobal *global = data;
+
+  global->enter_serial = serial;
+}
+
+static void
+text_input_leave (void                     *data,
+                  struct gtk_text_input    *text_input,
+                  uint32_t                  serial,
+                  struct wl_surface        *surface)
+{
+  GtkIMContextWayland *context;
+
+  if (!global->current)
+    return;
+
+  context = GTK_IM_CONTEXT_WAYLAND (global->current);
+  reset_preedit (context);
+}
+
+static void
+text_input_preedit (void                     *data,
+                    struct gtk_text_input    *text_input,
+                    const char               *text,
+                    guint                     cursor)
+{
+  GtkIMContextWayland *context;
+  gboolean state_change;
+
+  if (!global->current)
+    return;
+
+  context = GTK_IM_CONTEXT_WAYLAND (global->current);
+  if (!text && !context->preedit.text)
+    return;
+
+  state_change = ((text == NULL) != (context->preedit.text == NULL));
+
+  if (state_change && !context->preedit.text)
+    g_signal_emit_by_name (context, "preedit-start");
+
+  g_free (context->preedit.text);
+  context->preedit.text = g_strdup (text);
+  context->preedit.cursor_idx = cursor;
+
+  g_signal_emit_by_name (context, "preedit-changed");
+
+  if (state_change && !context->preedit.text)
+    g_signal_emit_by_name (context, "preedit-end");
+}
+
+static void
+text_input_commit (void                     *data,
+                   struct gtk_text_input    *text_input,
+                   const char               *text)
+{
+  GtkIMContextWaylandGlobal *global = data;
+
+  if (global->current && text)
+    g_signal_emit_by_name (global->current, "commit", text);
+}
+
+static void
+text_input_delete_surrounding_text (void                     *data,
+                                    struct gtk_text_input    *text_input,
+                                    uint32_t                  offset,
+                                    uint32_t                  len)
+{
+  GtkIMContextWaylandGlobal *global = data;
+
+  if (global->current)
+    g_signal_emit_by_name (global->current, "delete-surrounding", offset, len);
+}
+
+static const struct gtk_text_input_listener text_input_listener = {
+  text_input_enter,
+  text_input_leave,
+  text_input_preedit,
+  text_input_commit,
+  text_input_delete_surrounding_text
+};
+
+static void
+registry_handle_global (void               *data,
+                        struct wl_registry *registry,
+                        uint32_t            id,
+                        const char         *interface,
+                        uint32_t            version)
+{
+  GtkIMContextWaylandGlobal *global = data;
+  GdkSeat *seat = gdk_display_get_default_seat (gdk_display_get_default ());
+
+  if (strcmp (interface, "gtk_text_input_manager") == 0)
+    {
+      global->text_input_manager =
+        wl_registry_bind (global->registry, id,
+                          &gtk_text_input_manager_interface, 1);
+      global->text_input =
+        gtk_text_input_manager_get_text_input (global->text_input_manager,
+                                               gdk_wayland_seat_get_wl_seat (seat));
+      gtk_text_input_add_listener (global->text_input,
+                                   &text_input_listener, global);
+    }
+}
+
+static void
+registry_handle_global_remove (void               *data,
+                               struct wl_registry *registry,
+                               uint32_t            id)
+{
+  GtkIMContextWaylandGlobal *global = data;
+
+  gtk_text_input_destroy (global->text_input);
+  global->text_input = NULL;
+
+  gtk_text_input_manager_destroy (global->text_input_manager);
+  global->text_input_manager = NULL;
+}
+
+static const struct wl_registry_listener registry_listener = {
+    registry_handle_global,
+    registry_handle_global_remove
+};
+
+static void
+gtk_im_context_wayland_global_init (GdkDisplay *display)
+{
+  if (global != NULL)
+    return;
+
+  global = g_new0 (GtkIMContextWaylandGlobal, 1);
+  global->display = gdk_wayland_display_get_wl_display (display);
+  global->registry = wl_display_get_registry (global->display);
+
+  wl_registry_add_listener (global->registry, &registry_listener, global);
+}
+
+static void
+notify_surrounding_text (GtkIMContextWayland *context)
+{
+  if (!global || !global->text_input)
+    return;
+  if (global->current != GTK_IM_CONTEXT (context))
+    return;
+  if (!context->surrounding.text)
+    return;
+
+  gtk_text_input_set_surrounding_text (global->text_input,
+                                       context->surrounding.text,
+                                       context->surrounding.cursor_idx,
+                                       context->surrounding.cursor_idx);
+}
+
+static void
+notify_cursor_location (GtkIMContextWayland *context)
+{
+  cairo_rectangle_int_t rect;
+
+  if (!global || !global->text_input)
+    return;
+  if (global->current != GTK_IM_CONTEXT (context))
+    return;
+  if (!context->widget)
+    return;
+
+  rect = context->cursor_rect;
+  gtk_widget_translate_coordinates (context->widget,
+                                    gtk_widget_get_toplevel (context->widget),
+                                    rect.x, rect.y,
+                                    &rect.x, &rect.y);
+
+  gtk_text_input_set_cursor_rectangle (global->text_input,
+                                       rect.x, rect.y,
+                                       rect.width, rect.height);
+}
+
+static uint32_t
+translate_hints (GtkInputHints   input_hints,
+                 GtkInputPurpose purpose)
+{
+  uint32_t hints = 0;
+
+  if (input_hints & GTK_INPUT_HINT_SPELLCHECK)
+    hints |= GTK_TEXT_INPUT_CONTENT_HINT_SPELLCHECK;
+  if (input_hints & GTK_INPUT_HINT_WORD_COMPLETION)
+    hints |= GTK_TEXT_INPUT_CONTENT_HINT_COMPLETION;
+  if (input_hints & GTK_INPUT_HINT_LOWERCASE)
+    hints |= GTK_TEXT_INPUT_CONTENT_HINT_LOWERCASE;
+  if (input_hints & GTK_INPUT_HINT_UPPERCASE_CHARS)
+    hints |= GTK_TEXT_INPUT_CONTENT_HINT_UPPERCASE;
+  if (input_hints & GTK_INPUT_HINT_UPPERCASE_WORDS)
+    hints |= GTK_TEXT_INPUT_CONTENT_HINT_TITLECASE;
+  if (input_hints & GTK_INPUT_HINT_UPPERCASE_SENTENCES)
+    hints |= GTK_TEXT_INPUT_CONTENT_HINT_AUTO_CAPITALIZATION;
+
+  if (purpose == GTK_INPUT_PURPOSE_PIN ||
+      purpose == GTK_INPUT_PURPOSE_PASSWORD)
+    {
+      hints |= (GTK_TEXT_INPUT_CONTENT_HINT_HIDDEN_TEXT |
+                GTK_TEXT_INPUT_CONTENT_HINT_SENSITIVE_DATA);
+    }
+
+  return hints;
+}
+
+static uint32_t
+translate_purpose (GtkInputPurpose purpose)
+{
+  switch (purpose)
+    {
+    case GTK_INPUT_PURPOSE_FREE_FORM:
+      return GTK_TEXT_INPUT_CONTENT_PURPOSE_NORMAL;
+    case GTK_INPUT_PURPOSE_ALPHA:
+      return GTK_TEXT_INPUT_CONTENT_PURPOSE_ALPHA;
+    case GTK_INPUT_PURPOSE_DIGITS:
+      return GTK_TEXT_INPUT_CONTENT_PURPOSE_DIGITS;
+    case GTK_INPUT_PURPOSE_NUMBER:
+      return GTK_TEXT_INPUT_CONTENT_PURPOSE_NUMBER;
+    case GTK_INPUT_PURPOSE_PHONE:
+      return GTK_TEXT_INPUT_CONTENT_PURPOSE_PHONE;
+    case GTK_INPUT_PURPOSE_URL:
+      return GTK_TEXT_INPUT_CONTENT_PURPOSE_URL;
+    case GTK_INPUT_PURPOSE_EMAIL:
+      return GTK_TEXT_INPUT_CONTENT_PURPOSE_EMAIL;
+    case GTK_INPUT_PURPOSE_NAME:
+      return GTK_TEXT_INPUT_CONTENT_PURPOSE_NAME;
+    case GTK_INPUT_PURPOSE_PASSWORD:
+      return GTK_TEXT_INPUT_CONTENT_PURPOSE_PASSWORD;
+    case GTK_INPUT_PURPOSE_PIN:
+      return GTK_TEXT_INPUT_CONTENT_PURPOSE_PIN;
+    default:
+      g_assert_not_reached ();
+    }
+
+  return GTK_TEXT_INPUT_CONTENT_PURPOSE_NORMAL;
+}
+
+static void
+notify_content_type (GtkIMContextWayland *context)
+{
+  GtkInputHints hints;
+  GtkInputPurpose purpose;
+
+  if (global->current != GTK_IM_CONTEXT (context))
+    return;
+
+  g_object_get (context,
+                "input-hints", &hints,
+                "input-purpose", &purpose,
+                NULL);
+
+  gtk_text_input_set_content_type (global->text_input,
+                                   translate_hints (hints, purpose),
+                                   translate_purpose (purpose));
+}
+
+static void
+commit_state (GtkIMContextWayland *context)
+{
+  if (global->current != GTK_IM_CONTEXT (context))
+    return;
+  gtk_text_input_commit (global->text_input);
+}
+
+static void
+enable_text_input (GtkIMContextWayland *context,
+                   gboolean             toggle_panel)
+{
+  guint flags = 0;
+
+  if (context->use_preedit)
+    flags |= GTK_TEXT_INPUT_ENABLE_FLAGS_CAN_SHOW_PREEDIT;
+  if (toggle_panel)
+    flags |= GTK_TEXT_INPUT_ENABLE_FLAGS_TOGGLE_INPUT_PANEL;
+
+  gtk_text_input_enable (global->text_input,
+                         global->enter_serial,
+                         flags);
+}
+
+static void
+gtk_im_context_wayland_finalize (GObject *object)
+{
+  GtkIMContextWayland *context = GTK_IM_CONTEXT_WAYLAND (object);
+
+  g_clear_object (&context->widget);
+  g_clear_object (&context->gesture);
+
+  G_OBJECT_CLASS (gtk_im_context_wayland_parent_class)->finalize (object);
+}
+
+static void
+pressed_cb (GtkGestureMultiPress *gesture,
+            gint                  n_press,
+            gdouble               x,
+            gdouble               y,
+            GtkIMContextWayland  *context)
+{
+  if (n_press == 1)
+    {
+      context->press_x = x;
+      context->press_y = y;
+    }
+}
+
+static void
+released_cb (GtkGestureMultiPress *gesture,
+             gint                  n_press,
+             gdouble               x,
+             gdouble               y,
+             GtkIMContextWayland  *context)
+{
+  GtkInputHints hints;
+
+  g_object_get (context, "input-hints", &hints, NULL);
+
+  if (n_press == 1 &&
+      (hints & GTK_INPUT_HINT_INHIBIT_OSK) == 0 &&
+      !gtk_drag_check_threshold (context->widget,
+                                 context->press_x,
+                                 context->press_y,
+                                 x, y))
+    {
+      enable_text_input (GTK_IM_CONTEXT_WAYLAND (context), TRUE);
+    }
+}
+
+static void
+gtk_im_context_wayland_set_client_widget (GtkIMContext *context,
+                                          GtkWidget    *widget)
+{
+  GtkIMContextWayland *context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
+
+  if (widget == context_wayland->widget)
+    return;
+
+  if (context_wayland->widget && context_wayland->widget != widget)
+    g_clear_object (&context_wayland->gesture);
+
+  g_set_object (&context_wayland->widget, widget);
+
+  if (widget)
+    {
+      GtkGesture *gesture;
+
+      gesture = gtk_gesture_multi_press_new (widget);
+      gtk_event_controller_set_propagation_phase (GTK_EVENT_CONTROLLER (gesture),
+                                                  GTK_PHASE_CAPTURE);
+      g_signal_connect (gesture, "pressed",
+                        G_CALLBACK (pressed_cb), context);
+      g_signal_connect (gesture, "released",
+                        G_CALLBACK (released_cb), context);
+      context_wayland->gesture = gesture;
+    }
+}
+
+static void
+gtk_im_context_wayland_get_preedit_string (GtkIMContext   *context,
+                                           gchar         **str,
+                                           PangoAttrList **attrs,
+                                           gint           *cursor_pos)
+{
+  GtkIMContextWayland *context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
+  const char *preedit_str;
+
+  GTK_IM_CONTEXT_CLASS (gtk_im_context_wayland_parent_class)->get_preedit_string (context, str, attrs, 
cursor_pos);
+
+  /* If the parent implementation returns a len>0 string, go with it */
+  if (str && *str && **str)
+    return;
+
+  preedit_str =
+    context_wayland->preedit.text ? context_wayland->preedit.text : "";
+
+  if (str)
+    *str = g_strdup (preedit_str);
+  if (cursor_pos)
+    *cursor_pos = context_wayland->preedit.cursor_idx;
+
+  if (attrs)
+    {
+      *attrs = pango_attr_list_new ();
+      pango_attr_list_insert (*attrs,
+                              pango_attr_underline_new (PANGO_UNDERLINE_SINGLE));
+    }
+}
+
+static gboolean
+gtk_im_context_wayland_filter_keypress (GtkIMContext *context,
+                                        GdkEventKey  *key)
+{
+  /* This is done by the compositor */
+  return GTK_IM_CONTEXT_CLASS (gtk_im_context_wayland_parent_class)->filter_keypress (context, key);
+}
+
+static void
+gtk_im_context_wayland_focus_in (GtkIMContext *context)
+{
+  GtkIMContextWayland *context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
+
+  if (global->current == context)
+    return;
+  if (!global->text_input)
+    return;
+
+  global->current = context;
+  enable_text_input (context_wayland, FALSE);
+  notify_content_type (context_wayland);
+  notify_surrounding_text (context_wayland);
+  notify_cursor_location (context_wayland);
+  commit_state (context_wayland);
+}
+
+static void
+gtk_im_context_wayland_focus_out (GtkIMContext *context)
+{
+  if (global->current != context)
+    return;
+
+  gtk_text_input_disable (global->text_input);
+  global->current = NULL;
+}
+
+static void
+gtk_im_context_wayland_reset (GtkIMContext *context)
+{
+  reset_preedit (GTK_IM_CONTEXT_WAYLAND (context));
+
+  GTK_IM_CONTEXT_CLASS (gtk_im_context_wayland_parent_class)->reset (context);
+}
+
+static void
+gtk_im_context_wayland_set_cursor_location (GtkIMContext *context,
+                                            GdkRectangle *rect)
+{
+  GtkIMContextWayland *context_wayland;
+
+  context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
+
+  context_wayland->cursor_rect = *rect;
+  notify_cursor_location (context_wayland);
+  commit_state (context_wayland);
+}
+
+static void
+gtk_im_context_wayland_set_use_preedit (GtkIMContext *context,
+                                        gboolean      use_preedit)
+{
+  GtkIMContextWayland *context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
+
+  context_wayland->use_preedit = !!use_preedit;
+}
+
+static void
+gtk_im_context_wayland_set_surrounding (GtkIMContext *context,
+                                        const gchar  *text,
+                                        gint          len,
+                                        gint          cursor_index)
+{
+  GtkIMContextWayland *context_wayland;
+
+  context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
+
+  g_free (context_wayland->surrounding.text);
+  context_wayland->surrounding.text = g_strdup (text);
+  context_wayland->surrounding.cursor_idx = cursor_index;
+
+  notify_surrounding_text (context_wayland);
+  commit_state (context_wayland);
+}
+
+static gboolean
+gtk_im_context_wayland_get_surrounding (GtkIMContext  *context,
+                                        gchar        **text,
+                                        gint          *cursor_index)
+{
+  GtkIMContextWayland *context_wayland;
+
+  context_wayland = GTK_IM_CONTEXT_WAYLAND (context);
+
+  if (!context_wayland->surrounding.text)
+    return FALSE;
+
+  *text = context_wayland->surrounding.text;
+  *cursor_index = context_wayland->surrounding.cursor_idx;
+  return TRUE;
+}
+
+static void
+gtk_im_context_wayland_class_init (GtkIMContextWaylandClass *klass)
+{
+  GObjectClass *object_class = G_OBJECT_CLASS (klass);
+  GtkIMContextClass *im_context_class = GTK_IM_CONTEXT_CLASS (klass);
+
+  object_class->finalize = gtk_im_context_wayland_finalize;
+
+  im_context_class->set_client_widget = gtk_im_context_wayland_set_client_widget;
+  im_context_class->get_preedit_string = gtk_im_context_wayland_get_preedit_string;
+  im_context_class->filter_keypress = gtk_im_context_wayland_filter_keypress;
+  im_context_class->focus_in = gtk_im_context_wayland_focus_in;
+  im_context_class->focus_out = gtk_im_context_wayland_focus_out;
+  im_context_class->reset = gtk_im_context_wayland_reset;
+  im_context_class->set_cursor_location = gtk_im_context_wayland_set_cursor_location;
+  im_context_class->set_use_preedit = gtk_im_context_wayland_set_use_preedit;
+  im_context_class->set_surrounding = gtk_im_context_wayland_set_surrounding;
+  im_context_class->get_surrounding = gtk_im_context_wayland_get_surrounding;
+}
+
+static void
+on_content_type_changed (GtkIMContextWayland *context)
+{
+  notify_content_type (context);
+  commit_state (context);
+}
+
+static void
+gtk_im_context_wayland_init (GtkIMContextWayland *context)
+{
+  gtk_im_context_wayland_global_init (gdk_display_get_default ());
+
+  context->use_preedit = TRUE;
+  g_signal_connect_swapped (context, "notify::input-purpose",
+                            G_CALLBACK (on_content_type_changed), context);
+  g_signal_connect_swapped (context, "notify::input-hints",
+                            G_CALLBACK (on_content_type_changed), context);
+}
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