New feature: imporant missing option for use of Libraries: access to to the

file path where library is read from.

In Outliner, choose new view mode "Libraries". A ctrl+click on the library
name then allows to change the file name or path. Note that when you change
the file name, nothing is being re-read or re-linked. Only after saving the
.blend file and reading it back the new library is used.

This feature allows to cleanup library usage. You can make files relative,
or reorganize a project. Just keep in mind that you cannot use this feature
to fix .blend files that link to non-existing other files. That because the
lost data is actually not read at all, so cannot be saved either.

Currently, library errors are only printed in the console... quite
important to keep track of when using Libraries.

Implementation note: this Outliner view mode can become expanded to a full
"Database view", showing something similar as SHIFT+F4 databrowse does now.

source/blender/blenkernel/BKE_library.h

@@ -50,6 +50,8 @@ void id_us_plus(struct ID *id);
 int new_id(struct ListBase *lb, struct ID *id, const char *name);
 
 struct ListBase *wich_libbase(struct Main *mainlib, short type);
+
+#define MAX_LIBARRAY	40
 int set_listbasepointers(struct Main *main, struct ListBase **lb);
 
 void free_libblock(struct ListBase *lb, void *idv);

source/blender/blenkernel/intern/library.c

@@ -114,7 +114,6 @@
 #include "BPI_script.h"
 
 #define MAX_IDPUP		60	/* was 24 */
-#define MAX_LIBARRAY	100 /* was 30, warning: used it readfile.c too */
 
 /* ************* general ************************ */
 
@@ -201,6 +200,7 @@ ListBase *wich_libbase(Main *mainlib, short type)
 	return 0;
 }
 
+/* note: MAX_LIBARRAY define should match this code */
 int set_listbasepointers(Main *main, ListBase **lb)
 {
 	/* BACKWARDS! also watch order of free-ing! (mesh<->mat) */

source/blender/blenloader/intern/readfile.c

@@ -384,7 +384,7 @@ static void read_libraries(FileData *basefd, ListBase *mainlist);
 
 static void add_main_to_main(Main *mainvar, Main *from)
 {
-	ListBase *lbarray[100], *fromarray[100];	// define in library.c too
+	ListBase *lbarray[MAX_LIBARRAY], *fromarray[MAX_LIBARRAY];
 	int a;
 
 	a= set_listbasepointers(mainvar, lbarray);
@@ -434,7 +434,7 @@ static void split_libdata(ListBase *lb, Main *first)
 void blo_split_main(ListBase *mainlist)
 {
 	Main *mainl= mainlist->first;
-	ListBase *lbarray[30];
+	ListBase *lbarray[MAX_LIBARRAY];
 	Library *lib;
 	int i;
 
@@ -6260,7 +6260,7 @@ static void expand_sound(FileData *fd, Main *mainvar, bSound *snd)
 
 static void expand_main(FileData *fd, Main *mainvar)
 {
-	ListBase *lbarray[30];
+	ListBase *lbarray[MAX_LIBARRAY];
 	ID *id;
 	int a, doit= 1;
 
@@ -6643,7 +6643,7 @@ void BLO_library_append(SpaceFile *sfile, char *dir, int idcode)
 
 static int mainvar_count_libread_blocks(Main *mainvar)
 {
-	ListBase *lbarray[30];
+	ListBase *lbarray[MAX_LIBARRAY];
 	int a, tot= 0;
 
 	a= set_listbasepointers(mainvar, lbarray);
@@ -6661,7 +6661,7 @@ static void read_libraries(FileData *basefd, ListBase *mainlist)
 {
 	Main *mainl= mainlist->first;
 	Main *mainptr;
-	ListBase *lbarray[30];
+	ListBase *lbarray[MAX_LIBARRAY];
 	int a, doit= 1;
 
 	while(doit) {

source/blender/makesdna/DNA_space_types.h

@@ -526,6 +526,7 @@ typedef struct SpaceImaSel {
 #define SO_ACTIVE		4
 #define SO_SAME_TYPE	5
 #define SO_GROUPS		6
+#define SO_LIBRARIES	7
 
 /* SpaceOops->storeflag */
 #define SO_TREESTORE_CLEANUP	1

source/blender/src/header_oops.c

@@ -477,7 +477,10 @@ void oops_buttons(void)
 	} 
 #endif
 	else {
-		uiDefButS(block, MENU, B_REDR, "Outliner Display%t|All Scenes %x0|Current Scene %x1|Visible Layers %x2|Groups %x6|Same Types %x5|Selected %x3|Active %x4",	 xco, 0, 100, 20,  &soops->outlinevis, 0, 0, 0, 0, "");
+		if(G.main->library.first)
+			uiDefButS(block, MENU, B_REDR, "Outliner Display%t|Libraries %x7|All Scenes %x0|Current Scene %x1|Visible Layers %x2|Groups %x6|Same Types %x5|Selected %x3|Active %x4",	 xco, 0, 100, 20,  &soops->outlinevis, 0, 0, 0, 0, "");
+		else
+			uiDefButS(block, MENU, B_REDR, "Outliner Display%t|All Scenes %x0|Current Scene %x1|Visible Layers %x2|Groups %x6|Same Types %x5|Selected %x3|Active %x4",	 xco, 0, 100, 20,  &soops->outlinevis, 0, 0, 0, 0, "");
 	}
 	
 	/* always do as last */

source/blender/src/outliner.c

@@ -399,7 +399,7 @@ static TreeElement *outliner_add_element(SpaceOops *soops, ListBase *lb, void *i
 	
 	te->parent= parent;
 	te->index= index;	// for data arays
-	te->name= id->name+2; // default, can be overridden by non-ID data
+	te->name= id->name+2; // default, can be overridden by Library or non-ID data
 	te->idcode= GS(id->name);
 	
 	if(type==0) {
@@ -409,6 +409,9 @@ static TreeElement *outliner_add_element(SpaceOops *soops, ListBase *lb, void *i
 		
 		/* expand specific data always */
 		switch(GS(id->name)) {
+		case ID_LI:
+			te->name= ((Library *)id)->name;
+			break;
 		case ID_SCE:
 			{
 				Scene *sce= (Scene *)id;
@@ -788,7 +791,6 @@ static void outliner_make_hierarchy(SpaceOops *soops, ListBase *lb)
 
 static void outliner_build_tree(SpaceOops *soops)
 {
-	Scene *sce;
 	Base *base;
 	Object *ob;
 	TreeElement *te, *ten;
@@ -804,8 +806,15 @@ static void outliner_build_tree(SpaceOops *soops)
 	/* clear ob id.new flags */
 	for(ob= G.main->object.first; ob; ob= ob->id.next) ob->id.newid= NULL;
 	
-	/* option 1: all scenes */
-	if(soops->outlinevis == SO_ALL_SCENES) {
+	/* options */
+	if(soops->outlinevis == SO_LIBRARIES) {
+		Library *lib;
+		for(lib= G.main->library.first; lib; lib= lib->id.next) {
+			outliner_add_element(soops, &soops->tree, lib, NULL, 0, 0);
+		}
+	}
+	else if(soops->outlinevis == SO_ALL_SCENES) {
+		Scene *sce;
 		for(sce= G.main->scene.first; sce; sce= sce->id.next) {
 			te= outliner_add_element(soops, &soops->tree, sce, NULL, 0, 0);
 			tselem= TREESTORE(te);
@@ -848,7 +857,7 @@ static void outliner_build_tree(SpaceOops *soops)
 				
 				for(go= group->gobject.first; go; go= go->next) {
 					ten= outliner_add_element(soops, &te->subtree, go->ob, te, 0, 0);
-					ten->directdata= NULL;
+					ten->directdata= NULL; /* eh, why? */
 				}
 				outliner_make_hierarchy(soops, &te->subtree);
 				/* clear id.newid, to prevent objects be inserted in wrong scenes (parent in other scene) */
@@ -2134,7 +2143,7 @@ void outliner_operation_menu(ScrArea *sa)
 {
 	SpaceOops *soops= sa->spacedata.first;
 	
-	// globals
+	// bad globals
 	scenelevel= objectlevel= idlevel= datalevel=0;
 	
 	set_operation_types(soops, &soops->tree);
@@ -2360,6 +2369,8 @@ static void tselem_draw_icon(float x, float y, TreeStoreElem *tselem, TreeElemen
 				BIF_icon_draw(x, y, ICON_SCRIPT); break;
 			case ID_GR:
 				BIF_icon_draw(x, y, ICON_CIRCLE_DEHLT); break;
+			case ID_LI:
+				BIF_icon_draw(x, y, ICON_PARLIB); break;
 		}
 	}
 }
@@ -2739,6 +2750,7 @@ static void outliner_buttons(uiBlock *block, SpaceOops *soops, ListBase *lb)
 			
 			if(tselem->type==TSE_EBONE) len = sizeof(((EditBone*) 0)->name);
 			else if (tselem->type==TSE_MODIFIER) len = sizeof(((ModifierData*) 0)->name);
+			else if(tselem->id && GS(tselem->id->name)==ID_LI) len = sizeof(((Library*) 0)->name);
 			else len= sizeof(((ID*) 0)->name)-2;
 			
 			dx= BIF_GetStringWidth(G.font, te->name, 0);