Code

Filter effects dialog:
[inkscape.git] / src / style.cpp
index 07ea4a49a4c39eba85eb3121fcd02901d71110ad..87151c5a847feb38dd29251140c03aa88e37f460 100644 (file)
@@ -31,6 +31,7 @@
 #include "document.h"
 #include "extract-uri.h"
 #include "uri-references.h"
+#include "uri.h"
 #include "sp-paint-server.h"
 #include "streq.h"
 #include "strneq.h"
@@ -39,6 +40,9 @@
 #include "xml/repr.h"
 #include "unit-constants.h"
 #include "isnan.h"
+#include "macros.h"
+
+#include "sp-filter-reference.h"
 
 #include <sigc++/functors/ptr_fun.h>
 #include <sigc++/adaptors/bind.h>
 using Inkscape::CSSOStringStream;
 using std::vector;
 
-namespace Inkscape {
-
-/**
- * Parses a CSS url() specification; temporary hack until
- * style stuff is redone.
- * \param string the CSS string to parse
- * \return a newly-allocated URL string (or NULL); free with g_free()
- */
-gchar *parse_css_url(gchar const *string) {
-    if (!string)
-        return NULL;
-
-    gchar const *iter = string;
-    for ( ; g_ascii_isspace(*iter) ; iter = g_utf8_next_char(iter) );
-    if (strncmp(iter, "url(", 4))
-        return NULL;
-    iter += 4;
-
-    gchar const end_char = *iter;
-    if ( *iter == '"' || *iter == '\'' ) {
-        iter += 1;
-    }
-
-    GString *temp = g_string_new(NULL);
-    for ( ; *iter ; iter = g_utf8_next_char(iter) ) {
-        if ( *iter == '(' || *iter == ')'  ||
-             *iter == '"' || *iter == '\'' ||
-             g_ascii_isspace(*iter)        ||
-             g_ascii_iscntrl(*iter)           )
-        {
-            break;
-        }
-        if ( *iter == '\\' ) {
-            iter = g_utf8_next_char(iter);
-        }
-        if ( *iter & (gchar)0x80 ) {
-            break;
-        } else {
-            g_string_append_c(temp, *iter);
-        }
-    }
-
-    if ( *iter == end_char && end_char != ')' ) {
-        iter = g_utf8_next_char(iter);
-    }
-    gchar *result;
-    if ( *iter == ')' ) {
-        result = temp->str;
-        g_string_free(temp, FALSE);
-    } else {
-        result = NULL;
-        g_string_free(temp, TRUE);
-    }
-
-    return result;
-}
-
-}
-
 #define BMAX 8192
 
 class SPStyleEnum;
@@ -155,8 +100,6 @@ static gint sp_style_write_ilengthornormal(gchar *p, gint const len, gchar const
 static gint sp_style_write_itextdecoration(gchar *p, gint const len, gchar const *const key, SPITextDecoration const *const val, SPITextDecoration const *const base, guint const flags);
 static gint sp_style_write_ifilter(gchar *b, gint len, gchar const *key, SPIFilter const *filter, SPIFilter const *base, guint flags);
 
-static void css2_unescape_unquote(SPIString *val);
-
 static void sp_style_paint_clear(SPStyle *style, SPIPaint *paint);
 
 static void sp_style_filter_clear(SPStyle *style);
@@ -388,19 +331,119 @@ sp_style_object_release(SPObject *object, SPStyle *style)
     style->object = NULL;
 }
 
+/**
+ * Emit style modified signal on style's object if the filter changed.
+ */
+static void
+sp_style_filter_ref_modified(SPObject *obj, guint flags, SPStyle *style)
+{
+    SPFilter *filter=static_cast<SPFilter *>(obj);
+    if (style->getFilter() == filter)
+    {
+        if (style->object) {
+            style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
+        }
+    }
+}
 
+/**
+ * Gets called when the filter is (re)attached to the style
+ */
+static void
+sp_style_filter_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
+{
+    if (old_ref) {
+        style->filter_modified_connection.disconnect();
+    }
+    if ( SP_IS_FILTER(ref))
+    {
+        style->filter_modified_connection = 
+           ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_filter_ref_modified), style));
+    }
 
+    sp_style_filter_ref_modified(ref, 0, style);
+}
+
+/**
+ * Emit style modified signal on style's object if server is style's fill
+ * or stroke paint server.
+ */
+static void
+sp_style_paint_server_ref_modified(SPObject *obj, guint flags, SPStyle *style)
+{
+    SPPaintServer *server = static_cast<SPPaintServer *>(obj);
+
+    if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
+        && style->getFillPaintServer() == server)
+    {
+        if (style->object) {
+            /** \todo
+             * fixme: I do not know, whether it is optimal - we are
+             * forcing reread of everything (Lauris)
+             */
+            /** \todo
+             * fixme: We have to use object_modified flag, because parent
+             * flag is only available downstreams.
+             */
+            style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
+        }
+    } else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
+        && style->getStrokePaintServer() == server)
+    {
+        if (style->object) {
+            /// \todo fixme:
+            style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
+        }
+    } else {
+        g_assert_not_reached();
+    }
+}
+
+/**
+ * Gets called when the paintserver is (re)attached to the style
+ */
+static void
+sp_style_fill_paint_server_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
+{
+    if (old_ref) {
+        style->fill_ps_modified_connection.disconnect();
+    }
+    if (SP_IS_PAINT_SERVER(ref)) {
+        style->fill_ps_modified_connection = 
+           ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_paint_server_ref_modified), style));
+    }
+
+    sp_style_paint_server_ref_modified(ref, 0, style);
+}
+
+/**
+ * Gets called when the paintserver is (re)attached to the style
+ */
+static void
+sp_style_stroke_paint_server_ref_changed(SPObject *old_ref, SPObject *ref, SPStyle *style)
+{
+    if (old_ref) {
+        style->stroke_ps_modified_connection.disconnect();
+    }
+    if (SP_IS_PAINT_SERVER(ref)) {
+        style->stroke_ps_modified_connection = 
+          ref->connectModified(sigc::bind(sigc::ptr_fun(&sp_style_paint_server_ref_modified), style));
+    }
+
+    sp_style_paint_server_ref_modified(ref, 0, style);
+}
 
 /**
  * Returns a new SPStyle object with settings as per sp_style_clear().
  */
 SPStyle *
-sp_style_new()
+sp_style_new(SPDocument *document)
 {
     SPStyle *const style = g_new0(SPStyle, 1);
 
     style->refcount = 1;
     style->object = NULL;
+    style->document = document;
     style->text = sp_text_style_new();
     style->text_private = TRUE;
 
@@ -408,20 +451,10 @@ sp_style_new()
 
     style->cloned = false;
 
-    style->fill_hreffed = false;
-    style->stroke_hreffed = false;
-    style->filter_hreffed = false;
-
     new (&style->release_connection) sigc::connection();
-
-    new (&style->fill_release_connection) sigc::connection();
-    new (&style->fill_modified_connection) sigc::connection();
-
-    new (&style->stroke_release_connection) sigc::connection();
-    new (&style->stroke_modified_connection) sigc::connection();
-
-    new (&style->filter_release_connection) sigc::connection();
     new (&style->filter_modified_connection) sigc::connection();
+    new (&style->fill_ps_modified_connection) sigc::connection();
+    new (&style->stroke_ps_modified_connection) sigc::connection();
 
     return style;
 }
@@ -436,7 +469,7 @@ sp_style_new_from_object(SPObject *object)
     g_return_val_if_fail(object != NULL, NULL);
     g_return_val_if_fail(SP_IS_OBJECT(object), NULL);
 
-    SPStyle *style = sp_style_new();
+    SPStyle *style = sp_style_new(SP_OBJECT_DOCUMENT(object));
     style->object = object;
     style->release_connection = object->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_object_release), style));
 
@@ -478,21 +511,31 @@ sp_style_unref(SPStyle *style)
         style->release_connection.disconnect();
         style->release_connection.~connection();
         if (style->text) sp_text_style_unref(style->text);
+
+         if (style->fill.value.href) {
+             style->fill_ps_modified_connection.disconnect();
+             delete style->fill.value.href;
+             style->fill.value.href = NULL;
+         }
+         if (style->stroke.value.href) {
+             style->stroke_ps_modified_connection.disconnect();
+             delete style->stroke.value.href;
+             style->stroke.value.href = NULL;
+         }
+         if (style->filter.href) {
+             style->filter_modified_connection.disconnect();
+             delete style->filter.href;
+             style->filter.href = NULL;
+         }
+
+        style->filter_modified_connection.~connection();
+        style->fill_ps_modified_connection.~connection();
+        style->stroke_ps_modified_connection.~connection();
+
         sp_style_paint_clear(style, &style->fill);
         sp_style_paint_clear(style, &style->stroke);
         sp_style_filter_clear(style);
-        style->fill_release_connection.disconnect();
-        style->fill_release_connection.~connection();
-        style->fill_modified_connection.disconnect();
-        style->fill_modified_connection.~connection();
-        style->stroke_release_connection.disconnect();
-        style->stroke_release_connection.~connection();
-        style->stroke_modified_connection.disconnect();
-        style->stroke_modified_connection.~connection();
-        style->filter_modified_connection.disconnect();
-        style->filter_modified_connection.~connection();
-        style->filter_release_connection.disconnect();
-        style->filter_release_connection.~connection();
+
         g_free(style->stroke_dash.dash);
         g_free(style);
     }
@@ -677,8 +720,9 @@ sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
         val = repr->attribute("font-family");
         if (val) {
             if (!style->text_private) sp_style_privatize_text(style);
-            sp_style_read_istring(&style->text->font_family, val);
-            css2_unescape_unquote(&style->text->font_family);
+            gchar *val_unquoted = attribute_unquote(val);
+            sp_style_read_istring(&style->text->font_family, val_unquoted);
+            if (val_unquoted) g_free (val_unquoted);
         }
     }
 
@@ -686,12 +730,12 @@ sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
     if (!style->filter.set) {
         val = repr->attribute("filter");
         if (val) {
-               sp_style_read_ifilter(val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
+                     sp_style_read_ifilter(val, style, (object) ? SP_OBJECT_DOCUMENT(object) : NULL);
         }
     }
     SPS_READ_PENUM_IF_UNSET(&style->enable_background, repr,
                             "enable-background", enum_enable_background, true);
-            
+
     /* 3. Merge from parent */
     if (object) {
         if (object->parent) {
@@ -700,7 +744,7 @@ sp_style_read(SPStyle *style, SPObject *object, Inkscape::XML::Node *repr)
     } else {
         if (sp_repr_parent(repr)) {
             /// \todo fixme: This is not the prettiest thing (Lauris)
-            SPStyle *parent = sp_style_new();
+            SPStyle *parent = sp_style_new(NULL);
             sp_style_read(parent, NULL, sp_repr_parent(repr));
             sp_style_merge_from_parent(style, parent);
             sp_style_unref(parent);
@@ -777,8 +821,9 @@ sp_style_merge_property(SPStyle *style, gint id, gchar const *val)
         case SP_PROP_FONT_FAMILY:
             if (!style->text_private) sp_style_privatize_text(style);
             if (!style->text->font_family.set) {
-                sp_style_read_istring(&style->text->font_family, val);
-                css2_unescape_unquote(&style->text->font_family);
+                gchar *val_unquoted = attribute_unquote(val);
+                sp_style_read_istring(&style->text->font_family, val_unquoted);
+                if (val_unquoted) g_free (val_unquoted);
             }
             break;
         case SP_PROP_FONT_SIZE:
@@ -1128,6 +1173,9 @@ sp_style_merge_from_props(SPStyle *const style, CRPropList *const props)
 static void
 sp_style_merge_from_decl_list(SPStyle *const style, CRDeclaration const *const decl_list)
 {
+    // read the decls from end to start, using head recursion, so that latter declarations override
+    // (Ref: http://www.w3.org/TR/REC-CSS2/cascade.html#cascading-order point 4.)
+    // because sp_style_merge_style_from_decl only sets properties that are unset
     if (decl_list->next) {
         sp_style_merge_from_decl_list(style, decl_list->next);
     }
@@ -1934,7 +1982,7 @@ sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const pare
 
         if (!style->filter.set || style->filter.inherit)
         {
-            // FIXME: 
+            // FIXME:
             // instead of just copying over, we need to _really merge_ the two filters by combining their
             // filter primitives
             sp_style_merge_ifilter(style, &parent->filter);
@@ -2000,96 +2048,42 @@ sp_style_merge_from_dying_parent(SPStyle *const style, SPStyle const *const pare
 }
 
 
-
-/**
- * Disconnects from possible fill and stroke paint servers.
- */
 static void
-sp_style_paint_server_release(SPObject *obj, SPStyle *style)
+sp_style_set_ipaint_to_uri(SPStyle *style, SPIPaint *paint, const Inkscape::URI *uri, SPDocument *document)
 {
-    SPPaintServer *server=static_cast<SPPaintServer *>(obj);
-    if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
-        && (server == style->fill.value.paint.server))
-    {
-        sp_style_paint_clear(style, &style->fill);
+    // it may be that this style's SPIPaint has not yet created its URIReference;
+    // now that we have a document, we can create it here
+    if (!paint->value.href && document) {
+        paint->value.href = new SPPaintServerReference(document);
+        paint->value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun((paint == &style->fill)? sp_style_fill_paint_server_ref_changed : sp_style_stroke_paint_server_ref_changed), style));
     }
 
-    if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
-        && (server == style->stroke.value.paint.server))
-    {
-        sp_style_paint_clear(style, &style->stroke);
-    }
-}
-
-
+    if (paint->value.href && paint->value.href->getObject())
+        paint->value.href->detach();
 
-
-/**
- * Emit style modified signal on style's object if server is style's fill
- * or stroke paint server.
- */
-static void
-sp_style_paint_server_modified(SPObject *obj, guint flags, SPStyle *style)
-{
-    SPPaintServer *server = static_cast<SPPaintServer *>(obj);
-    if ((style->fill.type == SP_PAINT_TYPE_PAINTSERVER)
-        && (server == style->fill.value.paint.server))
-    {
-        if (style->object) {
-            /** \todo
-             * fixme: I do not know, whether it is optimal - we are
-             * forcing reread of everything (Lauris)
-             */
-            /** \todo
-             * fixme: We have to use object_modified flag, because parent
-             * flag is only available downstreams.
-             */
-            style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
-        }
-    } else if ((style->stroke.type == SP_PAINT_TYPE_PAINTSERVER)
-               && (server == style->stroke.value.paint.server))
-    {
-        if (style->object) {
-            /// \todo fixme:
-            style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
+    if (paint->value.href) {
+        try {
+            paint->value.href->attach(*uri);
+        } catch (Inkscape::BadURIException &e) {
+            g_warning("%s", e.what());
+            paint->value.href->detach();
         }
-    } else {
-        g_assert_not_reached();
     }
 }
 
-
-
-/**
- * Disconnects from filter.
- */
 static void
-sp_style_filter_release(SPObject *obj, SPStyle *style)
+sp_style_set_ipaint_to_uri_string (SPStyle *style, SPIPaint *paint, const gchar *uri)
 {
-    SPFilter *filter=static_cast<SPFilter *>(obj);
-    if (style->filter.filter == filter)
-    {
-        sp_style_filter_clear(style);
-    }
+    const Inkscape::URI IURI(uri);
+    sp_style_set_ipaint_to_uri(style, paint, &IURI, style->document);
 }
 
-
-/**
- * Emit style modified signal on style's object if the filter changed.
- */
-static void
-sp_style_filter_modified(SPObject *obj, guint flags, SPStyle *style)
+void
+sp_style_set_to_uri_string (SPStyle *style, bool isfill, const gchar *uri)
 {
-    SPFilter *filter=static_cast<SPFilter *>(obj);
-    if (style->filter.filter == filter)
-    {
-        if (style->object) {
-            style->object->requestModified(SP_OBJECT_MODIFIED_FLAG | SP_OBJECT_STYLE_MODIFIED_FLAG);
-        }
-    } 
+    sp_style_set_ipaint_to_uri_string (style, isfill? &style->fill : &style->stroke, uri);
 }
 
-
 /**
  *
  */
@@ -2111,33 +2105,8 @@ sp_style_merge_ipaint(SPStyle *style, SPIPaint *paint, SPIPaint const *parent)
             sp_color_copy(&paint->value.color, &parent->value.color);
             break;
         case SP_PAINT_TYPE_PAINTSERVER:
-            paint->value.paint.server = parent->value.paint.server;
-            paint->value.paint.uri = parent->value.paint.uri;
-            if (paint->value.paint.server) {
-                if (style->object && !style->cloned) { // href paintserver for style of non-clones only
-                    sp_object_href(SP_OBJECT(paint->value.paint.server), style);
-                    if (paint == &style->fill) {
-                        style->fill_hreffed = true;
-                    } else {
-                        assert(paint == &style->stroke);
-                        style->stroke_hreffed = true;
-                    }
-                }
-                if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
-                    SPObject *server = paint->value.paint.server;
-                    sigc::connection release_connection
-                      = server->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_paint_server_release), style));
-                    sigc::connection modified_connection
-                      = server->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_paint_server_modified), style));
-                    if (paint == &style->fill) {
-                        style->fill_release_connection = release_connection;
-                        style->fill_modified_connection = modified_connection;
-                    } else {
-                        assert(paint == &style->stroke);
-                        style->stroke_release_connection = release_connection;
-                        style->stroke_modified_connection = modified_connection;
-                    }
-                }
+            if (parent->value.href) {
+                sp_style_set_ipaint_to_uri(style, paint, parent->value.href->getURI(), parent->value.href->getOwnerDocument());
             }
             break;
         case SP_PAINT_TYPE_NONE:
@@ -2159,19 +2128,16 @@ sp_style_merge_ifilter(SPStyle *style, SPIFilter const *parent)
     sp_style_filter_clear(style);
     style->filter.set = parent->set;
     style->filter.inherit = parent->inherit;
-    style->filter.filter = parent->filter;
-    style->filter.uri = parent->uri;
-    if (style->filter.filter) {
-        if (style->object && !style->cloned) { // href filter for style of non-clones only
-            sp_object_href(SP_OBJECT(style->filter.filter), style);
-            style->filter_hreffed = true;
-        }
-        if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
-            SPObject *filter = style->filter.filter;
-            style->filter_release_connection
-                = filter->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_filter_release), style));
-            style->filter_modified_connection
-                = filter->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_filter_modified), style));
+
+    if (style->filter.href && style->filter.href->getObject())
+       style->filter.href->detach();
+
+    if (style->filter.href && parent->href) {
+        try {
+            style->filter.href->attach(*parent->href->getURI());
+        } catch (Inkscape::BadURIException &e) {
+            g_warning("%s", e.what());
+            style->filter.href->detach();
         }
     }
 }
@@ -2451,20 +2417,45 @@ sp_style_clear(SPStyle *style)
     sp_style_paint_clear(style, &style->fill);
     sp_style_paint_clear(style, &style->stroke);
     sp_style_filter_clear(style);
+
+    if (style->fill.value.href) 
+        delete style->fill.value.href;
+    if (style->stroke.value.href)
+        delete style->stroke.value.href;
+    if (style->filter.href)
+        delete style->filter.href;
+
     if (style->stroke_dash.dash) {
         g_free(style->stroke_dash.dash);
     }
 
     /** \todo fixme: Do that text manipulation via parents */
     SPObject *object = style->object;
+    SPDocument *document = style->document;
     gint const refcount = style->refcount;
     SPTextStyle *text = style->text;
     unsigned const text_private = style->text_private;
+
     memset(style, 0, sizeof(SPStyle));
+
     style->refcount = refcount;
     style->object = object;
+    style->document = document;
+
+    if (document) {
+        style->filter.href = new SPFilterReference(document);
+        style->filter.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_filter_ref_changed), style));
+
+        style->fill.value.href = new SPPaintServerReference(document);
+        style->fill.value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_fill_paint_server_ref_changed), style));
+
+        style->stroke.value.href = new SPPaintServerReference(document);
+        style->stroke.value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_stroke_paint_server_ref_changed), style));
+    }
+
     style->text = text;
     style->text_private = text_private;
+
     /* fixme: */
     style->text->font.set = FALSE;
     style->text->font_family.set = FALSE;
@@ -2571,10 +2562,6 @@ sp_style_clear(SPStyle *style)
         style->marker[i].set = FALSE;
     }
 
-    style->filter.set = FALSE;
-    style->filter.uri = NULL;
-    style->filter.filter = NULL;
-
     style->enable_background.value = SP_CSS_BACKGROUND_ACCUMULATE;
     style->enable_background.set = false;
     style->enable_background.inherit = false;
@@ -3013,10 +3000,8 @@ sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocume
         paint->inherit = FALSE;
         paint->currentcolor = FALSE;
     } else if (strneq(str, "url", 3) && paint != &style->color) {
-        // this is alloc'd uri, but seems to be shared with a parent
-        // potentially, so it's not any easy g_free case...
-        paint->value.paint.uri = extract_uri(str);
-        if (paint->value.paint.uri == NULL || *(paint->value.paint.uri) == '\0') {
+        gchar *uri = extract_uri(str);
+        if(uri == NULL || uri[0] == '\0') {
             paint->type = SP_PAINT_TYPE_NONE;
             return;
         }
@@ -3024,38 +3009,18 @@ sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocume
         paint->set = TRUE;
         paint->inherit = FALSE;
         paint->currentcolor = FALSE;
-        if (document) {
-            SPObject *ps = sp_uri_reference_resolve(document, str);
-            if (ps && SP_IS_PAINT_SERVER(ps)) {
-                paint->value.paint.server = SP_PAINT_SERVER(ps);
-                if (style->object && !style->cloned) {
-                    sp_object_href(SP_OBJECT(paint->value.paint.server), style);
-                    if (paint == &style->fill) {
-                        style->fill_hreffed = true;
-                    } else {
-                        assert(paint == &style->stroke);
-                        style->stroke_hreffed = true;
-                    }
-                }
-                if (style->object || style->cloned) {
-                    SPObject *server = paint->value.paint.server;
-                    sigc::connection release_connection
-                      = server->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_paint_server_release), style));
-                    sigc::connection modified_connection
-                      = server->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_paint_server_modified), style));
-                    if (paint == &style->fill) {
-                        style->fill_release_connection = release_connection;
-                        style->fill_modified_connection = modified_connection;
-                    } else {
-                        assert(paint == &style->stroke);
-                        style->stroke_release_connection = release_connection;
-                        style->stroke_modified_connection = modified_connection;
-                    }
-                }
-            } else {
-                paint->value.paint.server = NULL;
-            }
+
+        // it may be that this style's SPIPaint has not yet created its URIReference;
+        // now that we have a document, we can create it here
+        if (!paint->value.href && document) {
+            paint->value.href = new SPPaintServerReference(document);
+            paint->value.href->changedSignal().connect(sigc::bind(sigc::ptr_fun((paint == &style->fill)? sp_style_fill_paint_server_ref_changed : sp_style_stroke_paint_server_ref_changed), style));
         }
+
+        sp_style_set_ipaint_to_uri_string (style, paint, uri);
+
+        g_free (uri);
+        
     } else {
         guint32 const rgb0 = sp_svg_read_color(str, &str, 0xff);
         if (rgb0 != 0xff) {
@@ -3074,7 +3039,7 @@ sp_style_read_ipaint(SPIPaint *paint, gchar const *str, SPStyle *style, SPDocume
                     delete tmp;
                     tmp = 0;
                 }
-                paint->iccColor = tmp;
+                paint->value.iccColor = tmp;
             }
         }
     }
@@ -3159,49 +3124,47 @@ sp_style_read_ifilter(gchar const *str, SPStyle * style, SPDocument *document)
     if (streq(str, "inherit")) {
         f->set = TRUE;
         f->inherit = TRUE;
-        f->filter = NULL;
+        if (f->href && f->href->getObject())
+            f->href->detach(); 
     } else if(streq(str, "none")) {
         f->set = TRUE;
         f->inherit = FALSE;
-        f->filter = NULL;
+        if (f->href && f->href->getObject())
+           f->href->detach(); 
     } else if (strneq(str, "url", 3)) {
-        f->uri = extract_uri(str);
-        if(f->uri == NULL || f->uri[0] == '\0') {
+        char *uri = extract_uri(str);
+        if(uri == NULL || uri[0] == '\0') {
             g_warning("Specified filter url is empty");
             f->set = TRUE;
             f->inherit = FALSE;
-            f->filter = NULL;
             return;
         }
         f->set = TRUE;
         f->inherit = FALSE;
-        f->filter = NULL;
-        if (document) {
-            SPObject *obj = sp_uri_reference_resolve(document, str);
-            if (SP_IS_FILTER(obj)) {
-                f->filter = SP_FILTER(obj);
-                if (style->object && !style->cloned) {
-                    sp_object_href(obj, style);
-                    style->filter_hreffed = true;
-                }
-                if (style->object || style->cloned) { // connect to signals for style of real objects or clones (this excludes temp styles)
-                    SPObject *filter = style->filter.filter;
-                    style->filter_release_connection
-                        = filter->connectRelease(sigc::bind<1>(sigc::ptr_fun(&sp_style_filter_release), style));
-                    style->filter_modified_connection
-                        = filter->connectModified(sigc::bind<2>(sigc::ptr_fun(&sp_style_filter_modified), style));
-                }
-            } else {
-                g_warning("Element '%s' not found or is not a filter", f->uri);
-            }
+        if (f->href && f->href->getObject())
+            f->href->detach();
+
+        // it may be that this style has not yet created its SPFilterReference;
+        // now that we have a document, we can create it here
+        if (!f->href && document) {
+            f->href = new SPFilterReference(document);
+            f->href->changedSignal().connect(sigc::bind(sigc::ptr_fun(sp_style_filter_ref_changed), style));
         }
 
+        try {
+            f->href->attach(Inkscape::URI(uri));
+        } catch (Inkscape::BadURIException &e) {
+            g_warning("%s", e.what());
+            f->href->detach();
+        }
+        g_free (uri);
+
     } else {
         /* We shouldn't reach this if SVG input is well-formed */
         f->set = FALSE;
         f->inherit = FALSE;
-        f->filter = NULL;
-        f->uri = NULL;
+        if (f->href && f->href->getObject())
+            f->href->detach(); 
     }
 }
 
@@ -3352,7 +3315,9 @@ sp_style_write_istring(gchar *p, gint const len, gchar const *const key,
         if (val->inherit) {
             return g_snprintf(p, len, "%s:inherit;", key);
         } else {
-            return g_snprintf(p, len, "%s:%s;", key, val->value);
+            gchar *val_quoted = css2_escape_quote(val->value);
+            return g_snprintf(p, len, "%s:%s;", key, val_quoted);
+            g_free (val_quoted);
         }
     }
     return 0;
@@ -3553,14 +3518,14 @@ sp_paint_differ(SPIPaint const *const a, SPIPaint const *const b)
         return true;
     if (a->type == SP_PAINT_TYPE_COLOR)
         return !(sp_color_is_equal(&a->value.color, &b->value.color)
-                 && ((a->iccColor == b->iccColor)
-                     || (a->iccColor && b->iccColor
-                         && (a->iccColor->colorProfile == b->iccColor->colorProfile)
-                         && (a->iccColor->colors == b->iccColor->colors))));
+                 && ((a->value.iccColor == b->value.iccColor)
+                     || (a->value.iccColor && b->value.iccColor
+                         && (a->value.iccColor->colorProfile == b->value.iccColor->colorProfile)
+                         && (a->value.iccColor->colors == b->value.iccColor->colors))));
     /* todo: Allow for epsilon differences in iccColor->colors, e.g. changes small enough not to show up
      * in the string representation. */
     if (a->type == SP_PAINT_TYPE_PAINTSERVER)
-        return (a->value.paint.server != b->value.paint.server);
+        return (a->value.href == NULL || b->value.href == NULL || a->value.href->getObject() != b->value.href->getObject());
     return false;
 }
 
@@ -3587,11 +3552,11 @@ sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
                 case SP_PAINT_TYPE_COLOR: {
                     char color_buf[8];
                     sp_svg_write_color(color_buf, sizeof(color_buf), sp_color_get_rgba32_ualpha(&paint->value.color, 0));
-                    if (paint->iccColor) {
+                    if (paint->value.iccColor) {
                         CSSOStringStream css;
-                        css << color_buf << " icc-color(" << paint->iccColor->colorProfile;
-                        for (vector<double>::const_iterator i(paint->iccColor->colors.begin()),
-                                 iEnd(paint->iccColor->colors.end());
+                        css << color_buf << " icc-color(" << paint->value.iccColor->colorProfile;
+                        for (vector<double>::const_iterator i(paint->value.iccColor->colors.begin()),
+                                 iEnd(paint->value.iccColor->colors.end());
                              i != iEnd; ++i) {
                             css << ", " << *i;
                         }
@@ -3602,7 +3567,7 @@ sp_style_write_ipaint(gchar *b, gint const len, gchar const *const key,
                     }
                 }
                 case SP_PAINT_TYPE_PAINTSERVER:
-                    return g_snprintf(b, len, "%s:url(%s);", key, paint->value.paint.uri);
+                    return g_snprintf(b, len, "%s:url(%s);", key, paint->value.href? paint->value.href->getURI()->toString() : "");
                 default:
                     break;
             }
@@ -3681,8 +3646,8 @@ sp_style_write_ifilter(gchar *p, gint const len, gchar const *key,
     {
         if (val->inherit) {
             return g_snprintf(p, len, "%s:inherit;", key);
-        } else if (val->uri) {
-            return g_snprintf(p, len, "%s:url(%s);", key, val->uri);
+        } else if (val->href && val->href->getURI()) {
+            return g_snprintf(p, len, "%s:url(%s);", key, val->href->getURI()->toString());
         }
     }
 
@@ -3697,30 +3662,12 @@ sp_style_write_ifilter(gchar *p, gint const len, gchar const *key,
 static void
 sp_style_paint_clear(SPStyle *style, SPIPaint *paint)
 {
-    if ((paint->type == SP_PAINT_TYPE_PAINTSERVER) && paint->value.paint.server) {
-        if (paint == &style->fill) {
-            if (style->fill_hreffed) {
-                sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
-                style->fill_hreffed = false;
-            }
-            style->fill_release_connection.disconnect();
-            style->fill_modified_connection.disconnect();
-        } else {
-            assert(paint == &style->stroke);  // Only fill & stroke can have a paint server.
-            if (style->stroke_hreffed) {
-                sp_object_hunref(SP_OBJECT(paint->value.paint.server), style);
-                style->stroke_hreffed = false;
-            }
-            style->stroke_release_connection.disconnect();
-            style->stroke_modified_connection.disconnect();
-        }
+    if (paint->value.href && paint->value.href->getObject())
+        paint->value.href->detach(); 
 
-        paint->value.paint.server = NULL;
-    }
-    paint->value.paint.uri = NULL;
     paint->type = SP_PAINT_TYPE_NONE;
-    delete paint->iccColor;
-    paint->iccColor = NULL;
+    delete paint->value.iccColor;
+    paint->value.iccColor = NULL;
 }
 
 
@@ -3730,15 +3677,8 @@ sp_style_paint_clear(SPStyle *style, SPIPaint *paint)
 static void
 sp_style_filter_clear(SPStyle *style)
 {
-
-    if (style->filter_hreffed) {
-        sp_object_hunref(SP_OBJECT(style->filter.filter), style);
-        style->filter_hreffed = false;
-    }
-    style->filter_release_connection.disconnect();
-    style->filter_modified_connection.disconnect();
-
-    style->filter.filter = NULL;
+    if (style->filter.href && style->filter.href->getObject())
+        style->filter.href->detach(); 
 }
 
 
@@ -4027,28 +3967,81 @@ sp_css_attr_scale(SPCSSAttr *css, double ex)
 
 
 /**
- * Remove quotes from SPIString object value.
- *
- * \todo FIXME: now used for font family, but perhaps this should apply to
- * ALL strings (check CSS spec), in which case this should be part of
- * read_istring.
+ * Remove quotes and escapes from a string. Returned value must be g_free'd.
+ * Note: in CSS (in style= and in stylesheets), unquoting and unescaping is done
+ * by libcroco, our CSS parser, though it adds a new pair of "" quotes for the strings
+ * it parsed for us. So this function is only used to remove those quotes and for
+ * presentation attributes, without any unescaping. (XML unescaping
+ * (&amp; etc) is done by XML parser.)
  */
-static void
-css2_unescape_unquote(SPIString *val)
-{
-    if (val->set && val->value && strlen(val->value) >= 2) {
+gchar *
+attribute_unquote(gchar const *val)
+{
+    if (val) {
+        if (*val == '\'' || *val == '"') {
+            int l = strlen(val);
+            if (l >= 2) {
+                if ( ( val[0] == '"' && val[l - 1] == '"' )  ||
+                     ( val[0] == '\'' && val[l - 1] == '\'' )  ) {
+                    return (g_strndup (val+1, l-2));
+                }
+            }
+        }
+    }
 
-        /// \todo unescape all \-escaped chars
+    return (val? g_strdup (val) : NULL);
+}
 
-        int l = strlen(val->value);
-        if ( ( val->value[0] == '"' && val->value[l - 1] == '"' )  ||
-             ( val->value[0] == '\'' && val->value[l - 1] == '\'' )  ) {
-            memcpy(val->value, val->value + 1, l - 2);
-            val->value[l - 2] = '\0';
+/**
+ * Quote and/or escape string for writing to CSS (style=). Returned value must be g_free'd.
+ */
+gchar *
+css2_escape_quote(gchar const *val) {
+
+    Glib::ustring t;
+    bool quote = false;
+    bool last_was_space = false;
+
+    for (gchar const *i = val; *i; i++) {
+        bool is_space = ( *i == ' ' );
+        if (g_ascii_isalnum(*i) || *i=='-' || *i=='_') {
+            // ASCII alphanumeric, - and _ don't require quotes
+            t.push_back(*i);
+        } else if ( is_space && !last_was_space ) {
+            // non-consecutive spaces don't require quotes
+            t.push_back(*i);
+        } else if (*i=='\'') {
+            // single quotes require escaping and quotes
+            t.push_back('\\');
+            t.push_back(*i);
+            quote = true;
+        } else {
+            // everything else requires quotes
+            t.push_back(*i);
+            quote = true;
         }
+        if (i == val && !g_ascii_isalpha(*i)) {
+            // a non-ASCII/non-alpha initial character requires quotes
+            quote = true;
+        }
+        last_was_space = is_space;
+    }
+
+    if (last_was_space) {
+        // a trailing space requires quotes
+        quote = true;
     }
-}
 
+    if (quote) {
+        // we use single quotes so the result can be stored in an XML
+        // attribute without incurring un-aesthetic additional quoting
+        // (our XML emitter always uses double quotes)
+        t.insert(t.begin(), '\'');
+        t.push_back('\'');
+    }
+
+    return (t.empty() ? NULL : g_strdup (t.c_str()));
+}
 
 /*
   Local Variables: