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-rw-r--r--src/CMakeLists.txt2
-rw-r--r--src/node.c236
-rw-r--r--src/node.h143
3 files changed, 381 insertions, 0 deletions
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 6f78a26..d4d7d19 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -4,6 +4,7 @@ set(HEADERS
cmark.h
ast.h
buffer.h
+ node.h
chunk.h
references.h
debug.h
@@ -16,6 +17,7 @@ set(HEADERS
)
set(LIBRARY_SOURCES
cmark.c
+ node.c
blocks.c
inlines.c
print.c
diff --git a/src/node.c b/src/node.c
new file mode 100644
index 0000000..0255479
--- /dev/null
+++ b/src/node.c
@@ -0,0 +1,236 @@
+#include <stddef.h>
+
+#include "config.h"
+#include "node.h"
+
+CMARK_EXPORT cmark_node_type
+cmark_node_get_type(cmark_node *node)
+{
+ return node->type;
+}
+
+cmark_node*
+cmark_node_next(cmark_node *node)
+{
+ return node->next;
+}
+
+cmark_node*
+cmark_node_previous(cmark_node *node)
+{
+ return node->prev;
+}
+
+cmark_node*
+cmark_node_parent(cmark_node *node)
+{
+ return node->parent;
+}
+
+cmark_node*
+cmark_node_first_child(cmark_node *node)
+{
+ return node->first_child;
+}
+
+cmark_node*
+cmark_node_last_child(cmark_node *node)
+{
+ return node->last_child;
+}
+
+static inline bool
+S_is_block(cmark_node *node) {
+ return node->type >= CMARK_NODE_FIRST_BLOCK
+ && node->type <= CMARK_NODE_LAST_BLOCK;
+}
+
+static inline bool
+S_is_inline(cmark_node *node) {
+ return node->type >= CMARK_NODE_FIRST_INLINE
+ && node->type <= CMARK_NODE_LAST_INLINE;
+}
+
+static bool
+S_can_contain(cmark_node *node, cmark_node *child)
+{
+ if (child->type == CMARK_NODE_DOCUMENT) {
+ return false;
+ }
+
+ switch (node->type) {
+ case CMARK_NODE_DOCUMENT:
+ case CMARK_NODE_BQUOTE:
+ case CMARK_NODE_LIST_ITEM:
+ return S_is_block(child)
+ && child->type != CMARK_NODE_LIST_ITEM;
+
+ case CMARK_NODE_LIST:
+ return child->type == CMARK_NODE_LIST_ITEM;
+
+ case CMARK_NODE_PARAGRAPH:
+ case CMARK_NODE_ATX_HEADER:
+ case CMARK_NODE_SETEXT_HEADER:
+ case CMARK_NODE_EMPH:
+ case CMARK_NODE_STRONG:
+ case CMARK_NODE_LINK:
+ case CMARK_NODE_IMAGE:
+ case CMARK_NODE_LINK_LABEL:
+ return S_is_inline(child);
+
+ default:
+ break;
+ }
+
+ return false;
+}
+
+// Unlink a node without adjusting its next, prev, and parent pointers.
+static void
+S_node_unlink(cmark_node *node)
+{
+ if (node->prev) {
+ node->prev->next = node->next;
+ }
+ if (node->next) {
+ node->next->prev = node->prev;
+ }
+
+ // Adjust first_child and last_child of parent.
+ cmark_node *parent = node->parent;
+ if (parent) {
+ if (parent->first_child == node) {
+ parent->first_child = node->next;
+ }
+ if (parent->last_child == node) {
+ parent->last_child = node->prev;
+ }
+ }
+}
+
+void
+cmark_node_unlink(cmark_node *node) {
+ S_node_unlink(node);
+
+ node->next = NULL;
+ node->prev = NULL;
+ node->parent = NULL;
+}
+
+int
+cmark_node_insert_before(cmark_node *node, cmark_node *sibling)
+{
+ if (!S_can_contain(node->parent, sibling)) {
+ return 0;
+ }
+
+ S_node_unlink(sibling);
+
+ cmark_node *old_prev = node->prev;
+
+ // Insert 'sibling' between 'old_prev' and 'node'.
+ if (old_prev) {
+ old_prev->next = sibling;
+ }
+ sibling->prev = old_prev;
+ sibling->next = node;
+ node->prev = sibling;
+
+ // Set new parent.
+ cmark_node *parent = node->parent;
+ sibling->parent = parent;
+
+ // Adjust first_child of parent if inserted as first child.
+ if (parent && !old_prev) {
+ parent->first_child = sibling;
+ }
+
+ return 1;
+}
+
+int
+cmark_node_insert_after(cmark_node *node, cmark_node *sibling)
+{
+ if (!S_can_contain(node->parent, sibling)) {
+ return 0;
+ }
+
+ S_node_unlink(sibling);
+
+ cmark_node *old_next = node->next;
+
+ // Insert 'sibling' between 'node' and 'old_next'.
+ if (old_next) {
+ old_next->prev = sibling;
+ }
+ sibling->next = old_next;
+ sibling->prev = node;
+ node->next = sibling;
+
+ // Set new parent.
+ cmark_node *parent = node->parent;
+ sibling->parent = parent;
+
+ // Adjust last_child of parent if inserted as last child.
+ if (parent && !old_next) {
+ parent->last_child = sibling;
+ }
+
+ return 1;
+}
+
+int
+cmark_node_prepend_child(cmark_node *node, cmark_node *child)
+{
+ if (!S_can_contain(node, child)) {
+ return 0;
+ }
+
+ S_node_unlink(child);
+
+ cmark_node *old_first_child = node->first_child;
+
+ child->next = old_first_child;
+ child->prev = NULL;
+ child->parent = node;
+ node->first_child = child;
+
+ if (old_first_child) {
+ old_first_child->prev = child;
+ }
+ else {
+ // Also set last_child if node previously had no children.
+ node->last_child = child;
+ }
+
+ return 1;
+}
+
+int
+cmark_node_append_child(cmark_node *node, cmark_node *child)
+{
+ if (!S_can_contain(node, child)) {
+ return 0;
+ }
+
+ S_node_unlink(child);
+
+ cmark_node *old_last_child = node->last_child;
+
+ child->next = NULL;
+ child->prev = old_last_child;
+ child->parent = node;
+ node->last_child = child;
+
+ if (old_last_child) {
+ old_last_child->next = child;
+ }
+ else {
+ // Also set first_child if node previously had no children.
+ node->first_child = child;
+ }
+
+ return 1;
+}
+
+
diff --git a/src/node.h b/src/node.h
new file mode 100644
index 0000000..237c4ae
--- /dev/null
+++ b/src/node.h
@@ -0,0 +1,143 @@
+#ifndef CMARK_NODE_H
+#define CMARK_NODE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "cmark.h"
+#include "buffer.h"
+
+typedef enum {
+ // Block
+ CMARK_NODE_DOCUMENT,
+ CMARK_NODE_BQUOTE,
+ CMARK_NODE_LIST,
+ CMARK_NODE_LIST_ITEM,
+ CMARK_NODE_FENCED_CODE,
+ CMARK_NODE_INDENTED_CODE,
+ CMARK_NODE_HTML,
+ CMARK_NODE_PARAGRAPH,
+ CMARK_NODE_ATX_HEADER,
+ CMARK_NODE_SETEXT_HEADER,
+ CMARK_NODE_HRULE,
+ CMARK_NODE_REFERENCE_DEF,
+
+ CMARK_NODE_FIRST_BLOCK = CMARK_NODE_DOCUMENT,
+ CMARK_NODE_LAST_BLOCK = CMARK_NODE_REFERENCE_DEF,
+
+ // Inline
+ CMARK_NODE_STRING,
+ CMARK_NODE_SOFTBREAK,
+ CMARK_NODE_LINEBREAK,
+ CMARK_NODE_INLINE_CODE,
+ CMARK_NODE_INLINE_HTML,
+ CMARK_NODE_EMPH,
+ CMARK_NODE_STRONG,
+ CMARK_NODE_LINK,
+ CMARK_NODE_IMAGE,
+
+ CMARK_NODE_FIRST_INLINE = CMARK_NODE_STRING,
+ CMARK_NODE_LAST_INLINE = CMARK_NODE_IMAGE,
+
+ // Other
+ CMARK_NODE_LINK_LABEL
+} cmark_node_type;
+
+typedef struct {
+ cmark_list_type list_type;
+ int marker_offset;
+ int padding;
+ int start;
+ cmark_delim_type delimiter;
+ unsigned char bullet_char;
+ bool tight;
+} cmark_list;
+
+typedef struct {
+ int fence_length;
+ int fence_offset;
+ unsigned char fence_char;
+ cmark_strbuf info;
+} cmark_fenced_code;
+
+typedef struct {
+ int level;
+} cmark_header;
+
+typedef struct {
+ struct cmark_node *label;
+ unsigned char *url;
+ unsigned char *title;
+} cmark_link;
+
+struct cmark_node {
+ cmark_node_type type;
+
+ struct cmark_node *next;
+ struct cmark_node *prev;
+ struct cmark_node *parent;
+ struct cmark_node *first_child;
+ struct cmark_node *last_child;
+
+ int start_line;
+ int start_column;
+ int end_line;
+ bool open;
+ bool last_line_blank;
+
+ cmark_strbuf string_content;
+
+ union {
+ cmark_list list;
+ cmark_fenced_code code;
+ cmark_header header;
+ cmark_link link;
+ } as;
+};
+
+typedef struct cmark_node cmark_node;
+
+CMARK_EXPORT cmark_node_type
+cmark_node_get_type(cmark_node *node);
+
+// Tree traversal
+
+CMARK_EXPORT cmark_node*
+cmark_node_next(cmark_node *node);
+
+CMARK_EXPORT cmark_node*
+cmark_node_previous(cmark_node *node);
+
+CMARK_EXPORT cmark_node*
+cmark_node_parent(cmark_node *node);
+
+CMARK_EXPORT cmark_node*
+cmark_node_first_child(cmark_node *node);
+
+CMARK_EXPORT cmark_node*
+cmark_node_last_child(cmark_node *node);
+
+// Tree manipulation
+
+CMARK_EXPORT void
+cmark_node_unlink(cmark_node *node);
+
+CMARK_EXPORT int
+cmark_node_insert_before(cmark_node *node, cmark_node *sibling);
+
+CMARK_EXPORT int
+cmark_node_insert_before(cmark_node *node, cmark_node *sibling);
+
+CMARK_EXPORT int
+cmark_node_prepend_child(cmark_node *node, cmark_node *child);
+
+CMARK_EXPORT int
+cmark_node_append_child(cmark_node *node, cmark_node *child);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 08:09:17 +0000