[mutter/wip/carlosg/clipboard-manager: 7/10] core: Add clipboard manager
- From: Carlos Garnacho <carlosg src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [mutter/wip/carlosg/clipboard-manager: 7/10] core: Add clipboard manager
- Date: Thu, 14 Feb 2019 16:42:00 +0000 (UTC)
commit c73749cb24a3adf1a729c492d60633819ab49586
Author: Carlos Garnacho <carlosg gnome org>
Date: Mon Nov 19 19:57:15 2018 +0100
core: Add clipboard manager
This is a simple clipboard manager implementation on top of MetaSelection.
It will inspect the clipboard content for UTF-8 text and image data whenever
any other selection source claims ownership, and claim it for itself
whenever the clipboard goes unowned.
The stored text has a maximum size of 4MB and images 200MB, to prevent the
compositor from allocating indefinite amounts of memory.
This is not quite a X11 clipboard manager, but also works there.
src/core/display-private.h | 3 +
src/core/display.c | 4 +
src/core/meta-clipboard-manager.c | 163 ++++++++++++++++++++++++++++++++++++++
src/core/meta-clipboard-manager.h | 29 +++++++
src/meson.build | 2 +
5 files changed, 201 insertions(+)
---
diff --git a/src/core/display-private.h b/src/core/display-private.h
index 407eec689..1055ca48b 100644
--- a/src/core/display-private.h
+++ b/src/core/display-private.h
@@ -245,6 +245,9 @@ struct _MetaDisplay
MetaSoundPlayer *sound_player;
+ MetaSelectionSource *selection_source;
+ GBytes *saved_clipboard;
+ gchar *saved_clipboard_mimetype;
MetaSelection *selection;
};
diff --git a/src/core/display.c b/src/core/display.c
index 5418a11e9..5cdee1368 100644
--- a/src/core/display.c
+++ b/src/core/display.c
@@ -57,6 +57,7 @@
#include "core/frame.h"
#include "core/keybindings-private.h"
#include "core/main-private.h"
+#include "core/meta-clipboard-manager.h"
#include "core/meta-workspace-manager-private.h"
#include "core/util-private.h"
#include "core/window-private.h"
@@ -724,6 +725,7 @@ meta_display_open (void)
display->bell = meta_bell_new (display);
display->selection = meta_selection_new (display);
+ meta_clipboard_manager_init (display);
if (meta_should_autostart_x11_display ())
{
@@ -961,6 +963,8 @@ meta_display_close (MetaDisplay *display,
g_clear_object (&display->workspace_manager);
g_clear_object (&display->sound_player);
+ meta_clipboard_manager_shutdown (display);
+
g_object_unref (display);
the_display = NULL;
diff --git a/src/core/meta-clipboard-manager.c b/src/core/meta-clipboard-manager.c
new file mode 100644
index 000000000..594e7f1a8
--- /dev/null
+++ b/src/core/meta-clipboard-manager.c
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2018 Red Hat
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Carlos Garnacho <carlosg gnome org>
+ */
+#include "config.h"
+
+#include "core/meta-clipboard-manager.h"
+#include "core/meta-selection-source-memory.h"
+
+#define MAX_TEXT_SIZE (4 * 1024 * 1024) /* 4MB */
+#define MAX_IMAGE_SIZE (200 * 1024 * 1024) /* 200MB */
+
+/* Supported mimetype globs, from least to most preferred */
+static struct {
+ const gchar *mimetype_glob;
+ gssize max_transfer_size;
+} supported_mimetypes[] = {
+ { "text/plain", MAX_TEXT_SIZE },
+ { "text/plain;charset=utf-8", MAX_TEXT_SIZE },
+ { "image/*", MAX_IMAGE_SIZE },
+};
+
+static gboolean
+mimetype_match (const gchar *mimetype,
+ int *idx,
+ gssize *max_transfer_size)
+{
+ int i;
+
+ for (i = 0; i < G_N_ELEMENTS (supported_mimetypes); i++)
+ {
+ if (g_pattern_match_simple (supported_mimetypes[i].mimetype_glob, mimetype))
+ {
+ *max_transfer_size = supported_mimetypes[i].max_transfer_size;
+ *idx = i;
+ return TRUE;
+ }
+ }
+
+ return FALSE;
+}
+
+static void
+transfer_cb (MetaSelection *selection,
+ GAsyncResult *result,
+ GOutputStream *stream)
+{
+ MetaDisplay *display = meta_get_display ();
+ GError *error = NULL;
+
+ if (!meta_selection_transfer_finish (selection, result, &error))
+ {
+ g_error_free (error);
+ g_object_unref (stream);
+ return;
+ }
+
+ g_output_stream_close (stream, NULL, NULL);
+ display->saved_clipboard =
+ g_memory_output_stream_steal_as_bytes (G_MEMORY_OUTPUT_STREAM (stream));
+ g_object_unref (stream);
+}
+
+static void
+owner_changed_cb (MetaSelection *selection,
+ MetaSelectionType selection_type,
+ MetaSelectionSource *source,
+ MetaDisplay *display)
+{
+ /* Only track CLIPBOARD selection changed */
+ if (selection_type != META_SELECTION_CLIPBOARD)
+ return;
+
+ if (source && source != display->selection_source)
+ {
+ GOutputStream *output;
+ GList *mimetypes, *l;
+ int best_idx = -1;
+ const gchar *best = NULL;
+ gssize transfer_size = -1;
+
+ /* New selection source, initiate inspection */
+ g_clear_object (&display->selection_source);
+ g_clear_pointer (&display->saved_clipboard_mimetype, g_free);
+ g_clear_pointer (&display->saved_clipboard, g_bytes_unref);
+
+ mimetypes = meta_selection_get_mimetypes (selection, selection_type);
+
+ for (l = mimetypes; l; l = l->next)
+ {
+ gssize max_transfer_size;
+ int idx;
+
+ if (!mimetype_match (l->data, &idx, &max_transfer_size))
+ continue;
+
+ if (best_idx < idx)
+ {
+ best_idx = idx;
+ best = l->data;
+ transfer_size = max_transfer_size;
+ }
+ }
+
+ if (best_idx < 0)
+ return;
+
+ display->saved_clipboard_mimetype = g_strdup (best);
+ output = g_memory_output_stream_new_resizable ();
+ meta_selection_transfer_async (selection,
+ META_SELECTION_CLIPBOARD,
+ best,
+ transfer_size,
+ output,
+ NULL,
+ (GAsyncReadyCallback) transfer_cb,
+ output);
+ }
+ else if (!source && display->saved_clipboard)
+ {
+ /* Selection source is gone, time to take over */
+ source = meta_selection_source_memory_new (display->saved_clipboard_mimetype,
+ display->saved_clipboard);
+ g_set_object (&display->selection_source, source);
+ meta_selection_set_owner (selection, selection_type, source);
+ }
+}
+
+void
+meta_clipboard_manager_init (MetaDisplay *display)
+{
+ MetaSelection *selection;
+
+ selection = meta_display_get_selection (display);
+ g_signal_connect_after (selection, "owner-changed",
+ G_CALLBACK (owner_changed_cb), display);
+}
+
+void
+meta_clipboard_manager_shutdown (MetaDisplay *display)
+{
+ MetaSelection *selection;
+
+ g_clear_pointer (&display->saved_clipboard, g_bytes_unref);
+ selection = meta_display_get_selection (display);
+ g_signal_handlers_disconnect_by_func (selection, owner_changed_cb, display);
+}
diff --git a/src/core/meta-clipboard-manager.h b/src/core/meta-clipboard-manager.h
new file mode 100644
index 000000000..e1ea75ceb
--- /dev/null
+++ b/src/core/meta-clipboard-manager.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2018 Red Hat
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ * Author: Carlos Garnacho <carlosg gnome org>
+ */
+#ifndef META_CLIPBOARD_MANAGER_H
+#define META_CLIPBOARD_MANAGER_H
+
+#include "core/display-private.h"
+
+void meta_clipboard_manager_init (MetaDisplay *display);
+void meta_clipboard_manager_shutdown (MetaDisplay *display);
+
+#endif /* META_CLIPBOARD_MANAGER_H */
diff --git a/src/meson.build b/src/meson.build
index baab07c8b..27e5ede93 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -330,6 +330,8 @@ mutter_sources = [
'core/meta-accel-parse.h',
'core/meta-border.c',
'core/meta-border.h',
+ 'core/meta-clipboard-manager.c',
+ 'core/meta-clipboard-manager.h',
'core/meta-close-dialog.c',
'core/meta-close-dialog-default.c',
'core/meta-close-dialog-default-private.h',
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