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394 lines
14 KiB
C
394 lines
14 KiB
C
/* GDK - The GIMP Drawing Kit
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*
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* Copyright (C) 2017 Benjamin Otte <otte@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gdkcontentproviderprivate.h"
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#include "gdkclipboard.h"
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#include "gdkcontentformats.h"
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#include "gdkintl.h"
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/**
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* SECTION:gdkcontentprovider
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* @Short_description: Provides content for data transfer between applications
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* @Title: GdkContentProvider
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* @See_also: #GdkContentSerializer, #GdkContentDeserializer
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*
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* A GdkContentProvider is used to provide content for the clipboard in
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* a number of formats.
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*
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* To create a GdkContentProvider, use gdk_content_provider_new_for_value() or
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* gdk_content_provider_new_for_bytes().
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*
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* GDK knows how to handle common text and image formats out-of-the-box. See
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* #GdkContentSerializer and #GdkContentDeserializer if you want to add support
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* for application-specific data formats.
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*/
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typedef struct _GdkContentProviderPrivate GdkContentProviderPrivate;
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struct _GdkContentProviderPrivate
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{
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GdkContentFormats *formats;
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};
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enum {
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PROP_0,
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PROP_FORMATS,
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PROP_STORABLE_FORMATS,
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N_PROPERTIES
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};
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enum {
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CONTENT_CHANGED,
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N_SIGNALS
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};
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static GParamSpec *properties[N_PROPERTIES] = { NULL, };
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static guint signals[N_SIGNALS] = { 0 };
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G_DEFINE_TYPE_WITH_PRIVATE (GdkContentProvider, gdk_content_provider, G_TYPE_OBJECT)
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static void
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gdk_content_provider_real_attach_clipboard (GdkContentProvider *provider,
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GdkClipboard *clipboard)
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{
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}
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static void
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gdk_content_provider_real_detach_clipboard (GdkContentProvider *provider,
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GdkClipboard *clipboard)
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{
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}
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static GdkContentFormats *
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gdk_content_provider_real_ref_formats (GdkContentProvider *provider)
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{
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return gdk_content_formats_new (NULL, 0);
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}
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static GdkContentFormats *
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gdk_content_provider_real_ref_storable_formats (GdkContentProvider *provider)
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{
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return gdk_content_provider_ref_formats (provider);
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}
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static void
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gdk_content_provider_real_write_mime_type_async (GdkContentProvider *provider,
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const char *mime_type,
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GOutputStream *stream,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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GTask *task;
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task = g_task_new (provider, cancellable, callback, user_data);
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g_task_set_priority (task, io_priority);
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g_task_set_source_tag (task, gdk_content_provider_real_write_mime_type_async);
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g_task_return_new_error (task, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
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_("Cannot provide contents as “%s”"), mime_type);
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g_object_unref (task);
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}
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static gboolean
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gdk_content_provider_real_write_mime_type_finish (GdkContentProvider *provider,
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GAsyncResult *result,
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GError **error)
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{
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g_return_val_if_fail (g_task_is_valid (result, provider), FALSE);
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g_return_val_if_fail (g_task_get_source_tag (G_TASK (result)) == gdk_content_provider_real_write_mime_type_async, FALSE);
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return g_task_propagate_boolean (G_TASK (result), error);
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}
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static gboolean
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gdk_content_provider_real_get_value (GdkContentProvider *provider,
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GValue *value,
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GError **error)
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED,
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_("Cannot provide contents as %s"), G_VALUE_TYPE_NAME (value));
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return FALSE;
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}
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static void
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gdk_content_provider_get_property (GObject *gobject,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GdkContentProvider *provider = GDK_CONTENT_PROVIDER (gobject);
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switch (prop_id)
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{
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case PROP_FORMATS:
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g_value_take_boxed (value, gdk_content_provider_ref_formats (provider));
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break;
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case PROP_STORABLE_FORMATS:
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g_value_take_boxed (value, gdk_content_provider_ref_storable_formats (provider));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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break;
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}
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}
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static void
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gdk_content_provider_class_init (GdkContentProviderClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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object_class->get_property = gdk_content_provider_get_property;
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class->attach_clipboard = gdk_content_provider_real_attach_clipboard;
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class->detach_clipboard = gdk_content_provider_real_detach_clipboard;
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class->ref_formats = gdk_content_provider_real_ref_formats;
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class->ref_storable_formats = gdk_content_provider_real_ref_storable_formats;
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class->write_mime_type_async = gdk_content_provider_real_write_mime_type_async;
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class->write_mime_type_finish = gdk_content_provider_real_write_mime_type_finish;
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class->get_value = gdk_content_provider_real_get_value;
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/**
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* GdkContentProvider:formats:
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*
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* The possible formats that the provider can provide its data in.
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*/
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properties[PROP_FORMATS] =
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g_param_spec_boxed ("formats",
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"Formats",
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"The possible formats for data",
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GDK_TYPE_CONTENT_FORMATS,
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G_PARAM_READABLE |
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G_PARAM_STATIC_STRINGS |
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G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GdkContentProvider:storable-formats:
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*
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* The subset of formats that clipboard managers should store this provider's data in.
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*/
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properties[PROP_STORABLE_FORMATS] =
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g_param_spec_boxed ("storable-formats",
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"Storable formats",
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"The formats that data should be stored in",
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GDK_TYPE_CONTENT_FORMATS,
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G_PARAM_READABLE |
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G_PARAM_STATIC_STRINGS |
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G_PARAM_EXPLICIT_NOTIFY);
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/**
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* GdkContentProvider::content-changed:
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*
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* Emitted whenever the content provided by this provider has changed.
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*/
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signals[CONTENT_CHANGED] =
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g_signal_new ("content-changed",
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G_TYPE_FROM_CLASS (class),
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G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GdkContentProviderClass, content_changed),
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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g_object_class_install_properties (object_class, N_PROPERTIES, properties);
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}
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static void
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gdk_content_provider_init (GdkContentProvider *provider)
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{
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}
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/**
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* gdk_content_provider_ref_formats:
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* @provider: a #GdkContentProvider
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*
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* Gets the formats that the provider can provide its current contents in.
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*
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* Returns: (transfer full): The formats of the provider
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**/
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GdkContentFormats *
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gdk_content_provider_ref_formats (GdkContentProvider *provider)
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{
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g_return_val_if_fail (GDK_IS_CONTENT_PROVIDER (provider), NULL);
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return GDK_CONTENT_PROVIDER_GET_CLASS (provider)->ref_formats (provider);
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}
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/**
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* gdk_content_provider_ref_storable_formats:
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* @provider: a #GdkContentProvider
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*
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* Gets the formats that the provider suggests other applications to store
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* the data in.
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* An example of such an application would be a clipboard manager.
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*
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* This can be assumed to be a subset of gdk_content_provider_ref_formats().
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*
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* Returns: (transfer full): The storable formats of the provider
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**/
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GdkContentFormats *
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gdk_content_provider_ref_storable_formats (GdkContentProvider *provider)
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{
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g_return_val_if_fail (GDK_IS_CONTENT_PROVIDER (provider), NULL);
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return GDK_CONTENT_PROVIDER_GET_CLASS (provider)->ref_storable_formats (provider);
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}
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/**
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* gdk_content_provider_content_changed:
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* @provider: a #GdkContentProvider
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*
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* Emits the #GdkContentProvider::contents-changed signal.
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*/
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void
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gdk_content_provider_content_changed (GdkContentProvider *provider)
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{
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g_return_if_fail (GDK_IS_CONTENT_PROVIDER (provider));
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g_signal_emit (provider, signals[CONTENT_CHANGED], 0);
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g_object_notify_by_pspec (G_OBJECT (provider), properties[PROP_FORMATS]);
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}
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/**
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* gdk_content_provider_write_mime_type_async:
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* @provider: a #GdkContentProvider
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* @mime_type: the mime type to provide the data in
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* @stream: the #GOutputStream to write to
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* @io_priority: the [I/O priority][io-priority]
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* of the request.
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* @cancellable: (nullable): optional #GCancellable object, %NULL to ignore.
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* @callback: (scope async): callback to call when the request is satisfied
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* @user_data: (closure): the data to pass to callback function
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*
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* Asynchronously writes the contents of @provider to @stream in the given
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* @mime_type. When the operation is finished @callback will be called. You
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* can then call gdk_content_provider_write_mime_type_finish() to get the
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* result of the operation.
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*
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* The given mime type does not need to be listed in the formats returned by
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* gdk_content_provider_ref_formats(). However, if the given #GType is not
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* supported, #G_IO_ERROR_NOT_SUPPORTED will be reported.
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*
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* The given @stream will not be closed.
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**/
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void
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gdk_content_provider_write_mime_type_async (GdkContentProvider *provider,
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const char *mime_type,
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GOutputStream *stream,
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int io_priority,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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g_return_if_fail (GDK_IS_CONTENT_PROVIDER (provider));
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g_return_if_fail (mime_type != NULL);
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g_return_if_fail (G_IS_OUTPUT_STREAM (stream));
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g_return_if_fail (cancellable == NULL || G_IS_CANCELLABLE (cancellable));
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GDK_CONTENT_PROVIDER_GET_CLASS (provider)->write_mime_type_async (provider,
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g_intern_string (mime_type),
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stream,
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io_priority,
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cancellable,
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callback,
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user_data);
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}
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/**
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* gdk_content_provider_write_mime_type_finish:
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* @provider: a #GdkContentProvider
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* @result: a #GAsyncResult
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* @error: a #GError location to store the error occurring, or %NULL to
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* ignore.
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*
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* Finishes an asynchronous write operation started with
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* gdk_content_provider_write_mime_type_async().
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*
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* Returns: %TRUE if the operation was completed successfully. Otherwise
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* @error will be set to describe the failure.
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**/
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gboolean
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gdk_content_provider_write_mime_type_finish (GdkContentProvider *provider,
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GAsyncResult *result,
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GError **error)
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{
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g_return_val_if_fail (GDK_IS_CONTENT_PROVIDER (provider), FALSE);
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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return GDK_CONTENT_PROVIDER_GET_CLASS (provider)->write_mime_type_finish (provider, result, error);
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}
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/**
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* gdk_content_provider_get_value:
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* @provider: a #GdkContentProvider
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* @value: the #GValue to fill
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* @error: a #GError location to store the error occurring, or %NULL to
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* ignore.
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*
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* Gets the contents of @provider stored in @value.
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*
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* The @value will have been initialized to the #GType the value should be
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* provided in. This given #GType does not need to be listed in the formats
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* returned by gdk_content_provider_ref_formats(). However, if the given
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* #GType is not supported, this operation can fail and
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* #G_IO_ERROR_NOT_SUPPORTED will be reported.
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*
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* Returns: %TRUE if the value was set successfully. Otherwise
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* @error will be set to describe the failure.
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**/
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gboolean
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gdk_content_provider_get_value (GdkContentProvider *provider,
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GValue *value,
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GError **error)
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{
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g_return_val_if_fail (GDK_IS_CONTENT_PROVIDER (provider), FALSE);
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g_return_val_if_fail (G_IS_VALUE (value), FALSE);
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g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
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return GDK_CONTENT_PROVIDER_GET_CLASS (provider)->get_value (provider,
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value,
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error);
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}
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void
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gdk_content_provider_attach_clipboard (GdkContentProvider *provider,
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GdkClipboard *clipboard)
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{
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g_return_if_fail (GDK_IS_CONTENT_PROVIDER (provider));
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g_return_if_fail (GDK_IS_CLIPBOARD (clipboard));
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return GDK_CONTENT_PROVIDER_GET_CLASS (provider)->attach_clipboard (provider, clipboard);
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}
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void
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gdk_content_provider_detach_clipboard (GdkContentProvider *provider,
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GdkClipboard *clipboard)
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{
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g_return_if_fail (GDK_IS_CONTENT_PROVIDER (provider));
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g_return_if_fail (GDK_IS_CLIPBOARD (clipboard));
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return GDK_CONTENT_PROVIDER_GET_CLASS (provider)->detach_clipboard (provider, clipboard);
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}
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