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test/source/blender/editors/space_node/node_templates.cc
Hans Goudey 4bf34d9591 Nodes: Simplify location storage, remove hidden offfsets 
Currently each node's position is stored in the coordinate space of
its parent. To find the location of a node on the canvas, we have to
apply the translation of each of its parents. Also, nodes have hidden
"offset" values used while transforming frame nodes. Together,
those made the system much more complicated than necessary,
and they made the Python API ineffective.

This commit removes usage of the offset values and moves nodes
to be stored in the "global" space of the node canvas. It also resolves
some weird behavior when resizing frame nodes, and fixes a few bugs.

The change is forward compatible, so we still write files with nodes in
the old parent-space format. In 5.0 the conversion when writing can be
removed. The existing Python API also stays the same. A new
"location_absolute" property gives node locations in global space,
and changing the old property also moves the child nodes of frames.

Resolves #92458, #72904.

Pull Request: https://projects.blender.org/blender/blender/pulls/131335
2024-12-11 21:06:41 +01:00

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/* SPDX-FileCopyrightText: 2023 Blender Authors
*
* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup edinterface
*/
#include <cstdlib>
#include <cstring>
#include <optional>
#include "MEM_guardedalloc.h"
#include "DNA_node_types.h"
#include "DNA_screen_types.h"
#include "BLI_listbase.h"
#include "BLI_string.h"
#include "BLI_string_utf8.h"
#include "BLI_vector.hh"
#include "BLT_translation.hh"
#include "BKE_context.hh"
#include "BKE_lib_id.hh"
#include "BKE_main.hh"
#include "BKE_node_runtime.hh"
#include "BKE_node_tree_interface.hh"
#include "BKE_node_tree_update.hh"
#include "RNA_access.hh"
#include "RNA_prototypes.hh"
#include "NOD_node_declaration.hh"
#include "NOD_socket.hh"
#include "NOD_socket_declarations.hh"
#include "../interface/interface_intern.hh" /* XXX bad level */
#include "UI_interface.hh"
#include "ED_node.hh" /* own include */
#include "node_intern.hh"
#include "ED_undo.hh"
#include "WM_api.hh"
using blender::nodes::NodeDeclaration;
namespace blender::ed::space_node {
/************************* Node Socket Manipulation **************************/
/* describes an instance of a node type and a specific socket to link */
struct NodeLinkItem {
int socket_index; /* index for linking */
int socket_type; /* socket type for compatibility check */
const char *socket_name; /* ui label of the socket */
const char *node_name; /* ui label of the node */
/* extra settings */
bNodeTree *ngroup; /* group node tree */
};
static void node_link_item_init(NodeLinkItem &item)
{
item.socket_index = -1;
item.socket_type = SOCK_CUSTOM;
item.socket_name = nullptr;
item.node_name = nullptr;
item.ngroup = nullptr;
}
/* Compare an existing node to a link item to see if it can be reused.
* item must be for the same node type!
* XXX should become a node type callback
*/
static bool node_link_item_compare(bNode *node, NodeLinkItem *item)
{
if (ELEM(node->type, NODE_GROUP, NODE_CUSTOM_GROUP)) {
return (node->id == (ID *)item->ngroup);
}
return true;
}
static void node_link_item_apply(bNodeTree *ntree, bNode *node, NodeLinkItem *item)
{
if (ELEM(node->type, NODE_GROUP, NODE_CUSTOM_GROUP)) {
node->id = (ID *)item->ngroup;
BKE_ntree_update_tag_node_property(ntree, node);
}
else {
/* nothing to do for now */
}
if (node->id) {
id_us_plus(node->id);
}
}
static void node_tag_recursive(bNode *node)
{
if (!node || (node->flag & NODE_TEST)) {
return; /* in case of cycles */
}
node->flag |= NODE_TEST;
LISTBASE_FOREACH (bNodeSocket *, input, &node->inputs) {
if (input->link) {
node_tag_recursive(input->link->fromnode);
}
}
}
static void node_clear_recursive(bNode *node)
{
if (!node || !(node->flag & NODE_TEST)) {
return; /* in case of cycles */
}
node->flag &= ~NODE_TEST;
LISTBASE_FOREACH (bNodeSocket *, input, &node->inputs) {
if (input->link) {
node_clear_recursive(input->link->fromnode);
}
}
}
static void node_remove_linked(Main *bmain, bNodeTree *ntree, bNode *rem_node)
{
bNode *node, *next;
if (!rem_node) {
return;
}
/* tag linked nodes to be removed */
LISTBASE_FOREACH (bNode *, node, &ntree->nodes) {
node->flag &= ~NODE_TEST;
}
node_tag_recursive(rem_node);
/* clear tags on nodes that are still used by other nodes */
LISTBASE_FOREACH (bNode *, node, &ntree->nodes) {
if (!(node->flag & NODE_TEST)) {
LISTBASE_FOREACH (bNodeSocket *, sock, &node->inputs) {
if (sock->link && sock->link->fromnode != rem_node) {
node_clear_recursive(sock->link->fromnode);
}
}
}
}
/* remove nodes */
for (node = (bNode *)ntree->nodes.first; node; node = next) {
next = node->next;
if (node->flag & NODE_TEST) {
bke::node_remove_node(bmain, ntree, node, true);
}
}
}
/* disconnect socket from the node it is connected to */
static void node_socket_disconnect(Main *bmain,
bNodeTree *ntree,
bNode *node_to,
bNodeSocket *sock_to)
{
if (!sock_to->link) {
return;
}
bke::node_remove_link(ntree, sock_to->link);
sock_to->flag |= SOCK_COLLAPSED;
BKE_ntree_update_tag_node_property(ntree, node_to);
ED_node_tree_propagate_change(nullptr, bmain, ntree);
}
/* remove all nodes connected to this socket, if they aren't connected to other nodes */
static void node_socket_remove(Main *bmain, bNodeTree *ntree, bNode *node_to, bNodeSocket *sock_to)
{
if (!sock_to->link) {
return;
}
node_remove_linked(bmain, ntree, sock_to->link->fromnode);
sock_to->flag |= SOCK_COLLAPSED;
BKE_ntree_update_tag_node_property(ntree, node_to);
ED_node_tree_propagate_change(nullptr, bmain, ntree);
}
/* add new node connected to this socket, or replace an existing one */
static void node_socket_add_replace(const bContext *C,
bNodeTree *ntree,
bNode *node_to,
bNodeSocket *sock_to,
int type,
NodeLinkItem *item)
{
Main *bmain = CTX_data_main(C);
bNode *node_from;
bNodeSocket *sock_from_tmp;
bNode *node_prev = nullptr;
/* unlink existing node */
if (sock_to->link) {
node_prev = sock_to->link->fromnode;
bke::node_remove_link(ntree, sock_to->link);
}
/* find existing node that we can use */
for (node_from = (bNode *)ntree->nodes.first; node_from; node_from = node_from->next) {
if (node_from->type == type) {
break;
}
}
if (node_from) {
if (node_from->inputs.first || node_from->typeinfo->draw_buttons ||
node_from->typeinfo->draw_buttons_ex)
{
node_from = nullptr;
}
}
if (node_prev && node_prev->type == type && node_link_item_compare(node_prev, item)) {
/* keep the previous node if it's the same type */
node_from = node_prev;
}
else if (!node_from) {
node_from = bke::node_add_static_node(C, ntree, type);
if (node_prev != nullptr) {
/* If we're replacing existing node, use its location. */
node_from->location[0] = node_prev->location[0];
node_from->location[1] = node_prev->location[1];
}
else {
sock_from_tmp = (bNodeSocket *)BLI_findlink(&node_from->outputs, item->socket_index);
bke::node_position_relative(node_from, node_to, sock_from_tmp, sock_to);
}
node_link_item_apply(ntree, node_from, item);
ED_node_tree_propagate_change(C, bmain, ntree);
}
bke::node_set_active(ntree, node_from);
/* add link */
sock_from_tmp = (bNodeSocket *)BLI_findlink(&node_from->outputs, item->socket_index);
bke::node_add_link(ntree, node_from, sock_from_tmp, node_to, sock_to);
sock_to->flag &= ~SOCK_COLLAPSED;
/* copy input sockets from previous node */
if (node_prev && node_from != node_prev) {
LISTBASE_FOREACH (bNodeSocket *, sock_prev, &node_prev->inputs) {
LISTBASE_FOREACH (bNodeSocket *, sock_from, &node_from->inputs) {
if (bke::node_count_socket_links(ntree, sock_from) >=
bke::node_socket_link_limit(sock_from))
{
continue;
}
if (STREQ(sock_prev->identifier, sock_from->identifier) &&
sock_prev->type == sock_from->type)
{
bNodeLink *link = sock_prev->link;
if (link && link->fromnode) {
bke::node_add_link(ntree, link->fromnode, link->fromsock, node_from, sock_from);
bke::node_remove_link(ntree, link);
}
node_socket_copy_default_value(sock_from, sock_prev);
}
}
}
/* also preserve mapping for texture nodes */
if (node_from->typeinfo->nclass == NODE_CLASS_TEXTURE &&
node_prev->typeinfo->nclass == NODE_CLASS_TEXTURE &&
/* White noise texture node does not have NodeTexBase. */
node_from->storage != nullptr && node_prev->storage != nullptr)
{
memcpy(node_from->storage, node_prev->storage, sizeof(NodeTexBase));
}
/* remove node */
node_remove_linked(bmain, ntree, node_prev);
}
BKE_ntree_update_tag_node_property(ntree, node_from);
BKE_ntree_update_tag_node_property(ntree, node_to);
ED_node_tree_propagate_change(nullptr, bmain, ntree);
}
/****************************** Node Link Menu *******************************/
// #define UI_NODE_LINK_ADD 0
#define UI_NODE_LINK_DISCONNECT -1
#define UI_NODE_LINK_REMOVE -2
struct NodeLinkArg {
Main *bmain;
Scene *scene;
bNodeTree *ntree;
bNode *node;
bNodeSocket *sock;
bke::bNodeType *node_type;
NodeLinkItem item;
uiLayout *layout;
};
static Vector<NodeLinkItem> ui_node_link_items(NodeLinkArg *arg,
int in_out,
std::optional<NodeDeclaration> &r_node_decl)
{
Vector<NodeLinkItem> items;
/* XXX this should become a callback for node types! */
if (arg->node_type->type == NODE_GROUP) {
bNodeTree *ngroup;
for (ngroup = (bNodeTree *)arg->bmain->nodetrees.first; ngroup;
ngroup = (bNodeTree *)ngroup->id.next)
{
const char *disabled_hint;
if ((ngroup->type != arg->ntree->type) ||
!bke::node_group_poll(arg->ntree, ngroup, &disabled_hint))
{
continue;
}
}
for (ngroup = (bNodeTree *)arg->bmain->nodetrees.first; ngroup;
ngroup = (bNodeTree *)ngroup->id.next)
{
const char *disabled_hint;
if ((ngroup->type != arg->ntree->type) ||
!bke::node_group_poll(arg->ntree, ngroup, &disabled_hint))
{
continue;
}
ngroup->ensure_interface_cache();
Span<bNodeTreeInterfaceSocket *> iosockets = (in_out == SOCK_IN ?
ngroup->interface_inputs() :
ngroup->interface_outputs());
for (const int index : iosockets.index_range()) {
bNodeTreeInterfaceSocket *iosock = iosockets[index];
NodeLinkItem item;
node_link_item_init(item);
item.socket_index = index;
/* NOTE: int stemp->type is not fully reliable, not used for node group
* interface sockets. use the typeinfo->type instead.
*/
const bke::bNodeSocketType *typeinfo = iosock->socket_typeinfo();
item.socket_type = typeinfo->type;
item.socket_name = iosock->name;
item.node_name = ngroup->id.name + 2;
item.ngroup = ngroup;
items.append(item);
}
}
}
else if (arg->node_type->declare != nullptr) {
using namespace blender;
using namespace blender::nodes;
r_node_decl.emplace(NodeDeclaration());
blender::nodes::build_node_declaration(*arg->node_type, *r_node_decl, nullptr, nullptr);
Span<SocketDeclaration *> socket_decls = (in_out == SOCK_IN) ? r_node_decl->inputs :
r_node_decl->outputs;
int index = 0;
for (const SocketDeclaration *socket_decl_ptr : socket_decls) {
const SocketDeclaration &socket_decl = *socket_decl_ptr;
NodeLinkItem item;
node_link_item_init(item);
item.socket_index = index++;
item.socket_type = socket_decl.socket_type;
item.socket_name = socket_decl.name.c_str();
item.node_name = arg->node_type->ui_name;
items.append(item);
}
}
else {
bke::bNodeSocketTemplate *socket_templates = (in_out == SOCK_IN ? arg->node_type->inputs :
arg->node_type->outputs);
bke::bNodeSocketTemplate *stemp;
int i;
i = 0;
for (stemp = socket_templates; stemp && stemp->type != -1; stemp++, i++) {
NodeLinkItem item;
node_link_item_init(item);
item.socket_index = i;
item.socket_type = stemp->type;
item.socket_name = stemp->name;
item.node_name = arg->node_type->ui_name;
items.append(item);
}
}
return items;
}
static void ui_node_link(bContext *C, void *arg_p, void *event_p)
{
NodeLinkArg *arg = (NodeLinkArg *)arg_p;
Main *bmain = arg->bmain;
bNode *node_to = arg->node;
bNodeSocket *sock_to = arg->sock;
bNodeTree *ntree = arg->ntree;
int event = POINTER_AS_INT(event_p);
if (event == UI_NODE_LINK_DISCONNECT) {
node_socket_disconnect(bmain, ntree, node_to, sock_to);
}
else if (event == UI_NODE_LINK_REMOVE) {
node_socket_remove(bmain, ntree, node_to, sock_to);
}
else {
node_socket_add_replace(C, ntree, node_to, sock_to, arg->node_type->type, &arg->item);
}
ED_undo_push(C, "Node input modify");
}
static void ui_node_sock_name(const bNodeTree *ntree,
bNodeSocket *sock,
char name[UI_MAX_NAME_STR])
{
if (sock->link && sock->link->fromnode) {
bNode *node = sock->link->fromnode;
char node_name[UI_MAX_NAME_STR];
bke::nodeLabel(ntree, node, node_name, sizeof(node_name));
if (BLI_listbase_is_empty(&node->inputs) && node->outputs.first != node->outputs.last) {
BLI_snprintf(
name, UI_MAX_NAME_STR, "%s | %s", IFACE_(node_name), IFACE_(sock->link->fromsock->name));
}
else {
BLI_strncpy_utf8(name, IFACE_(node_name), UI_MAX_NAME_STR);
}
}
else if (sock->type == SOCK_SHADER) {
BLI_strncpy_utf8(name, IFACE_("None"), UI_MAX_NAME_STR);
}
else {
BLI_strncpy_utf8(name, IFACE_("Default"), UI_MAX_NAME_STR);
}
}
static int ui_compatible_sockets(int typeA, int typeB)
{
return (typeA == typeB);
}
static int ui_node_item_name_compare(const void *a, const void *b)
{
const bke::bNodeType *type_a = *(const bke::bNodeType **)a;
const bke::bNodeType *type_b = *(const bke::bNodeType **)b;
return BLI_strcasecmp_natural(type_a->ui_name, type_b->ui_name);
}
static bool ui_node_item_special_poll(const bNodeTree * /*ntree*/, const bke::bNodeType *ntype)
{
if (STREQ(ntype->idname, "ShaderNodeUVAlongStroke")) {
/* TODO(sergey): Currently we don't have Freestyle nodes edited from
* the buttons context, so can ignore its nodes completely.
*
* However, we might want to do some extra checks here later.
*/
return false;
}
return true;
}
static void ui_node_menu_column(NodeLinkArg *arg, int nclass, const char *cname)
{
bNodeTree *ntree = arg->ntree;
bNodeSocket *sock = arg->sock;
uiLayout *layout = arg->layout;
uiLayout *column = nullptr;
uiBlock *block = uiLayoutGetBlock(layout);
uiBut *but;
NodeLinkArg *argN;
int first = 1;
/* generate array of node types sorted by UI name */
blender::Vector<bke::bNodeType *> sorted_ntypes;
NODE_TYPES_BEGIN (ntype) {
const char *disabled_hint;
if (!(ntype->poll && ntype->poll(ntype, ntree, &disabled_hint))) {
continue;
}
if (ntype->nclass != nclass) {
continue;
}
if (!ui_node_item_special_poll(ntree, ntype)) {
continue;
}
sorted_ntypes.append(ntype);
}
NODE_TYPES_END;
qsort(sorted_ntypes.data(),
sorted_ntypes.size(),
sizeof(bke::bNodeType *),
ui_node_item_name_compare);
/* generate UI */
for (int j = 0; j < sorted_ntypes.size(); j++) {
bke::bNodeType *ntype = sorted_ntypes[j];
char name[UI_MAX_NAME_STR];
const char *cur_node_name = nullptr;
int num = 0;
int icon = ICON_NONE;
arg->node_type = ntype;
std::optional<blender::nodes::NodeDeclaration> node_decl;
Vector<NodeLinkItem> items = ui_node_link_items(arg, SOCK_OUT, node_decl);
for (const NodeLinkItem &item : items) {
if (ui_compatible_sockets(item.socket_type, sock->type)) {
num++;
}
}
for (const NodeLinkItem &item : items) {
if (!ui_compatible_sockets(item.socket_type, sock->type)) {
continue;
}
if (first) {
column = uiLayoutColumn(layout, false);
UI_block_layout_set_current(block, column);
uiItemL(column, IFACE_(cname), ICON_NODE);
but = (uiBut *)block->buttons.last;
first = 0;
}
if (num > 1) {
if (!cur_node_name || !STREQ(cur_node_name, item.node_name)) {
cur_node_name = item.node_name;
/* XXX Do not use uiItemL here,
* it would add an empty icon as we are in a menu! */
uiDefBut(block,
UI_BTYPE_LABEL,
0,
IFACE_(cur_node_name),
0,
0,
UI_UNIT_X * 4,
UI_UNIT_Y,
nullptr,
0.0,
0.0,
"");
}
SNPRINTF(name, "%s", IFACE_(item.socket_name));
icon = ICON_BLANK1;
}
else {
STRNCPY_UTF8(name, IFACE_(item.node_name));
icon = ICON_NONE;
}
but = uiDefIconTextBut(block,
UI_BTYPE_BUT,
0,
icon,
name,
0,
0,
UI_UNIT_X * 4,
UI_UNIT_Y,
nullptr,
0.0,
0.0,
TIP_("Add node to input"));
argN = (NodeLinkArg *)MEM_dupallocN(arg);
argN->item = item;
UI_but_funcN_set(but, ui_node_link, argN, nullptr);
}
}
}
static void node_menu_column_foreach_cb(void *calldata, int nclass, const StringRefNull name)
{
NodeLinkArg *arg = (NodeLinkArg *)calldata;
if (!ELEM(nclass, NODE_CLASS_GROUP, NODE_CLASS_LAYOUT)) {
ui_node_menu_column(arg, nclass, name.c_str());
}
}
static void ui_template_node_link_menu(bContext *C, uiLayout *layout, void *but_p)
{
Main *bmain = CTX_data_main(C);
Scene *scene = CTX_data_scene(C);
uiBlock *block = uiLayoutGetBlock(layout);
uiBut *but = (uiBut *)but_p;
uiLayout *split, *column;
NodeLinkArg *arg = (NodeLinkArg *)but->func_argN;
bNodeSocket *sock = arg->sock;
bke::bNodeTreeType *ntreetype = arg->ntree->typeinfo;
UI_block_layout_set_current(block, layout);
split = uiLayoutSplit(layout, 0.0f, false);
arg->bmain = bmain;
arg->scene = scene;
arg->layout = split;
if (ntreetype && ntreetype->foreach_nodeclass) {
ntreetype->foreach_nodeclass(arg, node_menu_column_foreach_cb);
}
column = uiLayoutColumn(split, false);
UI_block_layout_set_current(block, column);
if (sock->link) {
uiItemL(column, IFACE_("Link"), ICON_NONE);
but = (uiBut *)block->buttons.last;
but->drawflag = UI_BUT_TEXT_LEFT;
but = uiDefBut(block,
UI_BTYPE_BUT,
0,
CTX_IFACE_(BLT_I18NCONTEXT_OPERATOR_DEFAULT, "Remove"),
0,
0,
UI_UNIT_X * 4,
UI_UNIT_Y,
nullptr,
0.0,
0.0,
TIP_("Remove nodes connected to the input"));
UI_but_funcN_set(but, ui_node_link, MEM_dupallocN(arg), POINTER_FROM_INT(UI_NODE_LINK_REMOVE));
but = uiDefBut(block,
UI_BTYPE_BUT,
0,
IFACE_("Disconnect"),
0,
0,
UI_UNIT_X * 4,
UI_UNIT_Y,
nullptr,
0.0,
0.0,
TIP_("Disconnect nodes connected to the input"));
UI_but_funcN_set(
but, ui_node_link, MEM_dupallocN(arg), POINTER_FROM_INT(UI_NODE_LINK_DISCONNECT));
}
ui_node_menu_column(arg, NODE_CLASS_GROUP, N_("Group"));
}
} // namespace blender::ed::space_node
void uiTemplateNodeLink(
uiLayout *layout, bContext *C, bNodeTree *ntree, bNode *node, bNodeSocket *input)
{
using namespace blender::ed::space_node;
uiBlock *block = uiLayoutGetBlock(layout);
NodeLinkArg *arg;
uiBut *but;
float socket_col[4];
arg = MEM_cnew<NodeLinkArg>("NodeLinkArg");
arg->ntree = ntree;
arg->node = node;
arg->sock = input;
node_link_item_init(arg->item);
PointerRNA node_ptr = RNA_pointer_create(&ntree->id, &RNA_Node, node);
node_socket_color_get(*C, *ntree, node_ptr, *input, socket_col);
UI_block_layout_set_current(block, layout);
if (input->link || input->type == SOCK_SHADER || (input->flag & SOCK_HIDE_VALUE)) {
char name[UI_MAX_NAME_STR];
ui_node_sock_name(ntree, input, name);
but = uiDefMenuBut(
block, ui_template_node_link_menu, nullptr, name, 0, 0, UI_UNIT_X * 4, UI_UNIT_Y, "");
}
else {
but = uiDefIconMenuBut(
block, ui_template_node_link_menu, nullptr, ICON_NONE, 0, 0, UI_UNIT_X, UI_UNIT_Y, "");
}
UI_but_type_set_menu_from_pulldown(but);
UI_but_node_link_set(but, input, socket_col);
UI_but_drawflag_enable(but, UI_BUT_ICON_LEFT);
but->poin = (char *)but;
but->func_argN = arg;
but->func_argN_free_fn = MEM_freeN;
but->func_argN_copy_fn = MEM_dupallocN;
if (input->link && input->link->fromnode) {
if (input->link->fromnode->flag & NODE_ACTIVE_TEXTURE) {
but->flag |= UI_BUT_NODE_ACTIVE;
}
}
}
namespace blender::ed::space_node {
/**************************** Node Tree Layout *******************************/
static void ui_node_draw_input(uiLayout &layout,
bContext &C,
bNodeTree &ntree,
bNode &node,
bNodeSocket &input,
int depth,
const char *panel_label);
static void node_panel_toggle_button_cb(bContext *C, void *panel_state_argv, void *ntree_argv)
{
Main *bmain = CTX_data_main(C);
bNodePanelState *panel_state = static_cast<bNodePanelState *>(panel_state_argv);
bNodeTree *ntree = static_cast<bNodeTree *>(ntree_argv);
panel_state->flag ^= NODE_PANEL_COLLAPSED;
ED_node_tree_propagate_change(C, bmain, ntree);
/* Make sure panel state updates from the Properties Editor, too. */
WM_event_add_notifier(C, NC_SPACE | ND_SPACE_NODE_VIEW, nullptr);
}
static void ui_node_draw_panel(uiLayout &layout,
bNodeTree &ntree,
const nodes::PanelDeclaration &panel_decl,
bNodePanelState &panel_state)
{
uiLayout *row = uiLayoutRow(&layout, true);
uiLayoutSetPropDecorate(row, false);
/* Panel header with collapse icon */
uiBlock *block = uiLayoutGetBlock(row);
UI_block_emboss_set(block, UI_EMBOSS_NONE);
uiBut *but = uiDefIconTextBut(block,
UI_BTYPE_BUT,
0,
panel_state.is_collapsed() ? ICON_RIGHTARROW : ICON_DOWNARROW_HLT,
IFACE_(panel_decl.name.c_str()),
0,
0,
UI_UNIT_X * 4,
UI_UNIT_Y,
nullptr,
0.0,
0.0,
"");
UI_but_drawflag_enable(but, UI_BUT_TEXT_LEFT | UI_BUT_NO_TOOLTIP);
UI_but_func_set(but, node_panel_toggle_button_cb, &panel_state, &ntree);
UI_block_emboss_set(block, UI_EMBOSS);
}
static void ui_node_draw_recursive(uiLayout &layout,
bContext &C,
bNodeTree &ntree,
bNode &node,
const nodes::PanelDeclaration &panel_decl,
const int depth)
{
bNodePanelState &panel_state = node.panel_states_array[panel_decl.index];
ui_node_draw_panel(layout, ntree, panel_decl, panel_state);
if (panel_state.is_collapsed()) {
return;
}
for (const nodes::ItemDeclaration *item_decl : panel_decl.items) {
if (const auto *socket_decl = dynamic_cast<const nodes::SocketDeclaration *>(item_decl)) {
if (socket_decl->in_out == SOCK_IN) {
ui_node_draw_input(layout,
C,
ntree,
node,
node.socket_by_decl(*socket_decl),
depth,
panel_decl.name.c_str());
}
}
else if (const auto *sub_panel_decl = dynamic_cast<const nodes::PanelDeclaration *>(item_decl))
{
ui_node_draw_recursive(layout, C, ntree, node, *sub_panel_decl, depth + 1);
}
else if (const auto *layout_decl = dynamic_cast<const nodes::LayoutDeclaration *>(item_decl)) {
PointerRNA nodeptr = RNA_pointer_create(&ntree.id, &RNA_Node, &node);
layout_decl->draw(&layout, &C, &nodeptr);
}
}
}
static void ui_node_draw_node(
uiLayout &layout, bContext &C, bNodeTree &ntree, bNode &node, int depth)
{
PointerRNA nodeptr = RNA_pointer_create(&ntree.id, &RNA_Node, &node);
if (node.declaration() && node.declaration()->use_custom_socket_order) {
const nodes::NodeDeclaration &node_decl = *node.declaration();
for (const nodes::ItemDeclaration *item_decl : node_decl.root_items) {
if (const auto *panel_decl = dynamic_cast<const nodes::PanelDeclaration *>(item_decl)) {
ui_node_draw_recursive(layout, C, ntree, node, *panel_decl, depth + 1);
}
else if (const auto *socket_decl = dynamic_cast<const nodes::SocketDeclaration *>(item_decl))
{
if (socket_decl->in_out == SOCK_IN) {
ui_node_draw_input(
layout, C, ntree, node, node.socket_by_decl(*socket_decl), depth, nullptr);
}
}
}
}
else {
if (node.typeinfo->draw_buttons) {
if (node.type != NODE_GROUP) {
uiLayoutSetPropSep(&layout, true);
node.typeinfo->draw_buttons(&layout, &C, &nodeptr);
}
}
LISTBASE_FOREACH (bNodeSocket *, input, &node.inputs) {
ui_node_draw_input(layout, C, ntree, node, *input, depth + 1, nullptr);
}
}
}
static void ui_node_draw_input(uiLayout &layout,
bContext &C,
bNodeTree &ntree,
bNode &node,
bNodeSocket &input,
int depth,
const char *panel_label)
{
uiBlock *block = uiLayoutGetBlock(&layout);
uiLayout *row = nullptr;
bool dependency_loop;
if (input.flag & SOCK_UNAVAIL) {
return;
}
/* to avoid eternal loops on cyclic dependencies */
node.flag |= NODE_TEST;
bNode *lnode = (input.link) ? input.link->fromnode : nullptr;
dependency_loop = (lnode && (lnode->flag & NODE_TEST));
if (dependency_loop) {
lnode = nullptr;
}
/* socket RNA pointer */
PointerRNA inputptr = RNA_pointer_create(&ntree.id, &RNA_NodeSocket, &input);
PointerRNA nodeptr = RNA_pointer_create(&ntree.id, &RNA_Node, &node);
row = uiLayoutRow(&layout, true);
uiPropertySplitWrapper split_wrapper = uiItemPropertySplitWrapperCreate(row);
/* Decorations are added manually here. */
uiLayoutSetPropDecorate(row, false);
/* Empty decorator item for alignment. */
bool add_dummy_decorator = false;
{
uiLayout *sub = uiLayoutRow(split_wrapper.label_column, true);
if (depth > 0) {
UI_block_emboss_set(block, UI_EMBOSS_NONE);
if (lnode &&
(lnode->inputs.first || (lnode->typeinfo->draw_buttons && lnode->type != NODE_GROUP)))
{
int icon = (input.flag & SOCK_COLLAPSED) ? ICON_RIGHTARROW : ICON_DOWNARROW_HLT;
uiItemR(sub, &inputptr, "show_expanded", UI_ITEM_R_ICON_ONLY, "", icon);
}
UI_block_emboss_set(block, UI_EMBOSS);
}
sub = uiLayoutRow(sub, true);
uiLayoutSetAlignment(sub, UI_LAYOUT_ALIGN_RIGHT);
uiItemL(sub, node_socket_get_label(&input, panel_label), ICON_NONE);
}
if (dependency_loop) {
uiItemL(row, RPT_("Dependency Loop"), ICON_ERROR);
add_dummy_decorator = true;
}
else if (lnode) {
/* input linked to a node */
uiTemplateNodeLink(row, &C, &ntree, &node, &input);
add_dummy_decorator = true;
if (depth == 0 || !(input.flag & SOCK_COLLAPSED)) {
if (depth == 0) {
uiItemS(&layout);
}
ui_node_draw_node(layout, C, ntree, *lnode, depth);
}
}
else {
uiLayout *sub = uiLayoutRow(row, true);
uiTemplateNodeLink(sub, &C, &ntree, &node, &input);
if (input.flag & SOCK_HIDE_VALUE) {
add_dummy_decorator = true;
}
/* input not linked, show value */
else {
switch (input.type) {
case SOCK_VECTOR:
uiItemS(sub);
sub = uiLayoutColumn(sub, true);
ATTR_FALLTHROUGH;
case SOCK_FLOAT:
case SOCK_INT:
case SOCK_ROTATION:
case SOCK_BOOLEAN:
case SOCK_RGBA:
uiItemR(sub, &inputptr, "default_value", UI_ITEM_NONE, "", ICON_NONE);
if (split_wrapper.decorate_column) {
uiItemDecoratorR(
split_wrapper.decorate_column, &inputptr, "default_value", RNA_NO_INDEX);
}
break;
case SOCK_STRING: {
const bNodeTree *node_tree = (const bNodeTree *)nodeptr.owner_id;
SpaceNode *snode = CTX_wm_space_node(&C);
if (node_tree->type == NTREE_GEOMETRY && snode != nullptr) {
/* Only add the attribute search in the node editor, in other places there is not
* enough context. */
node_geometry_add_attribute_search_button(C, node, inputptr, *sub);
}
else {
uiItemR(sub, &inputptr, "default_value", UI_ITEM_NONE, "", ICON_NONE);
}
if (split_wrapper.decorate_column) {
uiItemDecoratorR(
split_wrapper.decorate_column, &inputptr, "default_value", RNA_NO_INDEX);
}
break;
}
case SOCK_MENU:
uiItemL(sub, RPT_("Unsupported Menu Socket"), ICON_NONE);
break;
case SOCK_CUSTOM:
input.typeinfo->draw(&C, sub, &inputptr, &nodeptr, input.name);
break;
default:
add_dummy_decorator = true;
}
}
}
if (add_dummy_decorator && split_wrapper.decorate_column) {
uiItemDecoratorR(split_wrapper.decorate_column, nullptr, std::nullopt, 0);
}
node_socket_add_tooltip(ntree, input, *row);
/* clear */
node.flag &= ~NODE_TEST;
}
} // namespace blender::ed::space_node
void uiTemplateNodeView(
uiLayout *layout, bContext *C, bNodeTree *ntree, bNode *node, bNodeSocket *input)
{
using namespace blender::ed::space_node;
if (!ntree) {
return;
}
ntree->ensure_topology_cache();
/* clear for cycle check */
LISTBASE_FOREACH (bNode *, tnode, &ntree->nodes) {
tnode->flag &= ~NODE_TEST;
}
if (input) {
ui_node_draw_input(*layout, *C, *ntree, *node, *input, 0, nullptr);
}
else {
ui_node_draw_node(*layout, *C, *ntree, *node, 0);
}
}
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