From 55d43e4e27e0ba58a47fad70957dfa989aa173ad Mon Sep 17 00:00:00 2001
From: "Johan B. C. Engelen" <jbc.engelen@swissonline.ch>
Date: Tue, 14 Aug 2007 20:54:48 +0000
Subject: Commit LivePathEffect branch to trunk! (disabled
 extension/internal/bitmap/*.* in build.xml to fix compilation)

(bzr r3472)
---
 src/live_effects/lpeobject-reference.cpp | 161 +++++++++++++++++++++++++++++++
 1 file changed, 161 insertions(+)
 create mode 100644 src/live_effects/lpeobject-reference.cpp

(limited to 'src/live_effects/lpeobject-reference.cpp')

diff --git a/src/live_effects/lpeobject-reference.cpp b/src/live_effects/lpeobject-reference.cpp
new file mode 100644
index 000000000..a5392ef90
--- /dev/null
+++ b/src/live_effects/lpeobject-reference.cpp
@@ -0,0 +1,161 @@
+/*
+ * The reference corresponding to the inkscape:live-effect attribute
+ *
+ * Copyright (C) 2007 Johan Engelen
+ *
+ * Released under GNU GPL, read the file 'COPYING' for more information.
+ */
+
+#include "enums.h"
+#include "live_effects/lpeobject-reference.h"
+#include "live_effects/lpeobject.h"
+
+#include "prefs-utils.h"
+#include "uri.h"
+
+namespace Inkscape {
+
+namespace LivePathEffect {
+
+static void lpeobjectreference_href_changed(SPObject *old_ref, SPObject *ref, LPEObjectReference *lpeobjref);
+static void lpeobjectreference_delete_self(SPObject *deleted, LPEObjectReference *lpeobjref);
+static void lpeobjectreference_source_modified(SPObject *iSource, guint flags, LPEObjectReference *lpeobjref);
+
+LPEObjectReference::LPEObjectReference(SPObject* i_owner) : URIReference(i_owner)
+{
+    owner=i_owner;
+    lpeobject_href = NULL;
+    lpeobject_repr = NULL;
+    lpeobject = NULL;
+    _changed_connection = changedSignal().connect(sigc::bind(sigc::ptr_fun(lpeobjectreference_href_changed), this)); // listening to myself, this should be virtual instead
+
+    user_unlink = NULL;
+}
+
+LPEObjectReference::~LPEObjectReference(void)
+{
+    _changed_connection.disconnect(); // to do before unlinking
+
+    quit_listening();
+    unlink();
+}
+
+bool LPEObjectReference::_acceptObject(SPObject * const obj) const
+{
+    if (IS_LIVEPATHEFFECT(obj)) {
+        SPObject * const owner = getOwner();
+        /* Refuse references to us or to an ancestor. */
+        for ( SPObject *iter = owner ; iter ; iter = SP_OBJECT_PARENT(iter) ) {
+            if ( iter == obj ) {
+                return false;
+            }
+        }
+        return true;
+    } else {
+        return false;
+    }
+}
+
+void
+LPEObjectReference::link(char *to)
+{
+    if ( to == NULL ) {
+        quit_listening();
+        unlink();
+    } else {
+        if ( !lpeobject_href || ( strcmp(to, lpeobject_href) != 0 ) ) {
+            g_free(lpeobject_href);
+            lpeobject_href = g_strdup(to);
+            try {
+                attach(Inkscape::URI(to));
+            } catch (Inkscape::BadURIException &e) {
+                /* TODO: Proper error handling as per
+                 * http://www.w3.org/TR/SVG11/implnote.html#ErrorProcessing.
+                 */
+                g_warning("%s", e.what());
+                detach();
+            }
+        }
+    }
+}
+
+void
+LPEObjectReference::unlink(void)
+{
+    g_free(lpeobject_href);
+    lpeobject_href = NULL;
+    detach();
+}
+
+void
+LPEObjectReference::start_listening(LivePathEffectObject* to)
+{
+    if ( to == NULL ) {
+        return;
+    }
+    lpeobject = to;
+    lpeobject_repr = SP_OBJECT_REPR(to);
+    _delete_connection = to->connectDelete(sigc::bind(sigc::ptr_fun(&lpeobjectreference_delete_self), this));
+    _modified_connection = to->connectModified(sigc::bind<2>(sigc::ptr_fun(&lpeobjectreference_source_modified), this));
+}
+
+void
+LPEObjectReference::quit_listening(void)
+{
+    if ( lpeobject == NULL ) {
+        return;
+    }
+    _modified_connection.disconnect();
+    _delete_connection.disconnect();
+    lpeobject_repr = NULL;
+    lpeobject = NULL;
+}
+
+static void
+lpeobjectreference_href_changed(SPObject */*old_ref*/, SPObject */*ref*/, LPEObjectReference *lpeobjref)
+{
+    lpeobjref->quit_listening();
+    LivePathEffectObject *refobj = LIVEPATHEFFECT( lpeobjref->getObject() );
+    if ( refobj ) {
+        lpeobjref->start_listening(refobj);
+    }
+
+    lpeobjref->owner->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+}
+
+static void
+lpeobjectreference_delete_self(SPObject */*deleted*/, LPEObjectReference *lpeobjref)
+{
+    guint const mode = prefs_get_int_attribute("options.cloneorphans", "value", SP_CLONE_ORPHANS_UNLINK);
+
+    if (mode == SP_CLONE_ORPHANS_UNLINK) {
+        // leave it be. just forget about the source
+        lpeobjref->quit_listening();
+        lpeobjref->unlink();
+        if (lpeobjref->user_unlink)
+            lpeobjref->user_unlink(lpeobjref->owner);
+    } else if (mode == SP_CLONE_ORPHANS_DELETE) {
+        lpeobjref->owner->deleteObject();
+    }
+}
+
+static void
+lpeobjectreference_source_modified(SPObject *iSource, guint flags, LPEObjectReference *lpeobjref)
+{
+    lpeobjref->owner->requestDisplayUpdate(SP_OBJECT_MODIFIED_FLAG);
+}
+
+}; //namespace LivePathEffect
+
+}; // namespace inkscape
+
+/*
+  Local Variables:
+  mode:c++
+  c-file-style:"stroustrup"
+  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
+  indent-tabs-mode:nil
+  fill-column:99
+  End:
+*/
+// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :
-- 
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