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-rw-r--r--src/html/html.c463
1 files changed, 226 insertions, 237 deletions
diff --git a/src/html/html.c b/src/html/html.c
index 76d488a..96fce66 100644
--- a/src/html/html.c
+++ b/src/html/html.c
@@ -7,58 +7,12 @@
#include "cmark.h"
#include "node.h"
#include "buffer.h"
-#include "debug.h"
#include "html/houdini.h"
-typedef struct RenderStack {
- struct RenderStack *previous;
- const char* literal;
- cmark_node* next_sibling;
- bool tight;
- bool trim;
-} render_stack;
+// Functions to convert cmark_nodes to HTML strings.
-static void free_render_stack(render_stack * rstack)
-{
- render_stack * tempstack;
- while (rstack) {
- tempstack = rstack;
- rstack = rstack->previous;
- free(tempstack);
- }
-}
-
-static render_stack* push_render_stack(render_stack* rstack,
- cmark_node* node,
- const char* literal)
-{
- render_stack* newstack;
- newstack = (render_stack*)malloc(sizeof(render_stack));
- if (newstack == NULL) {
- return NULL;
- }
- newstack->previous = rstack;
- newstack->next_sibling = node;
- newstack->literal = literal;
- newstack->tight = false;
- newstack->trim = false;
- return newstack;
-}
-
-static render_stack* pop_render_stack(render_stack* rstack)
-{
- render_stack* top = rstack;
-
- if (rstack == NULL) {
- return NULL;
- }
- rstack = rstack->previous;
- top->previous = NULL;
- free_render_stack(top);
- return rstack;
-}
-
-// Functions to convert cmark_node and inline lists to HTML strings.
+static bool
+finish_node(strbuf *html, cmark_node *node, bool tight);
static void escape_html(strbuf *dest, const unsigned char *source, int length)
{
@@ -82,65 +36,163 @@ static inline void cr(strbuf *html)
strbuf_putc(html, '\n');
}
-// Convert an inline list to HTML. Returns 0 on success, and sets result.
-static void inlines_to_plain_html(strbuf *html, cmark_node* ils)
+// Convert the inline children of a node to a plain string.
+static void inlines_to_plain_html(strbuf *html, cmark_node* node)
{
- cmark_node* children;
- bool visit_children;
- render_stack* rstack = NULL;
+ cmark_node* cur = node->first_child;
- while(ils != NULL) {
- visit_children = false;
- switch(ils->type) {
+ if (cur == NULL) {
+ return;
+ }
+
+ while (true) {
+ switch(cur->type) {
case NODE_STRING:
case NODE_INLINE_CODE:
case NODE_INLINE_HTML:
- escape_html(html, ils->as.literal.data, ils->as.literal.len);
+ escape_html(html, cur->as.literal.data, cur->as.literal.len);
break;
case NODE_LINEBREAK:
case NODE_SOFTBREAK:
- strbuf_putc(html, '\n');
+ strbuf_putc(html, ' ');
break;
- case NODE_LINK:
- case NODE_IMAGE:
- case NODE_STRONG:
- case NODE_EMPH:
- children = ils->first_child;
- visit_children = true;
- rstack = push_render_stack(rstack, ils->next, "");
- break;
default:
break;
}
- if (visit_children) {
- ils = children;
- } else {
- ils = ils->next;
+
+ if (cur->first_child) {
+ cur = cur->first_child;
+ continue;
}
- while (ils == NULL && rstack != NULL) {
- strbuf_puts(html, rstack->literal);
- ils = rstack->next_sibling;
- rstack = pop_render_stack(rstack);
+
+ next_sibling:
+ if (cur->next) {
+ cur = cur->next;
+ continue;
}
+ cur = cur->parent;
+ if (cur == node) {
+ break;
+ }
+ goto next_sibling;
}
-
- free_render_stack(rstack);
}
-// Convert an inline list to HTML. Returns 0 on success, and sets result.
-static void inlines_to_html(strbuf *html, cmark_node* ils)
+// Convert a cmark_node to HTML.
+static void node_to_html(strbuf *html, cmark_node *node)
{
+ cmark_node *cur;
+ char start_header[] = "<h0>";
+ bool tight = false;
bool visit_children;
- render_stack* rstack = NULL;
- while(ils != NULL) {
- visit_children = false;
- switch(ils->type) {
+ if (node == NULL) {
+ return;
+ }
+
+ cur = node;
+ while (true) {
+ // Only NODE_IMAGE wants to skip its children.
+ visit_children = true;
+
+ switch(cur->type) {
+ case NODE_DOCUMENT:
+ break;
+
+ case NODE_PARAGRAPH:
+ if (!tight) {
+ cr(html);
+ strbuf_puts(html, "<p>");
+ }
+ break;
+
+ case NODE_BQUOTE:
+ cr(html);
+ strbuf_puts(html, "<blockquote>\n");
+ // BQUOTE doesn't use any of the 'as' structs,
+ // so the 'list' member can be used to store the
+ // current value of 'tight'.
+ cur->as.list.tight = tight;
+ tight = false;
+ break;
+
+ case NODE_LIST_ITEM:
+ cr(html);
+ strbuf_puts(html, "<li>");
+ break;
+
+ case NODE_LIST: {
+ cmark_list *list = &cur->as.list;
+ bool tmp;
+
+ // make sure a list starts at the beginning of the line:
+ cr(html);
+
+ if (list->list_type == CMARK_BULLET_LIST) {
+ strbuf_puts(html, "<ul>\n");
+ }
+ else if (list->start == 1) {
+ strbuf_puts(html, "<ol>\n");
+ }
+ else {
+ strbuf_printf(html, "<ol start=\"%d\">\n",
+ list->start);
+ }
+
+ // Store the current value of 'tight' by swapping.
+ tmp = list->tight;
+ list->tight = tight;
+ tight = tmp;
+ break;
+ }
+
+ case NODE_ATX_HEADER:
+ case NODE_SETEXT_HEADER:
+ cr(html);
+ start_header[2] = '0' + cur->as.header.level;
+ strbuf_puts(html, start_header);
+ break;
+
+ case NODE_INDENTED_CODE:
+ case NODE_FENCED_CODE: {
+ strbuf *info = &cur->as.code.info;
+ cr(html);
+
+ if (cur->type != NODE_FENCED_CODE
+ || strbuf_len(info) == 0) {
+ strbuf_puts(html, "<pre><code>");
+ }
+ else {
+ int first_tag = strbuf_strchr(info, ' ', 0);
+ if (first_tag < 0)
+ first_tag = strbuf_len(info);
+
+ strbuf_puts(html,
+ "<pre><code class=\"language-");
+ escape_html(html, info->ptr, first_tag);
+ strbuf_puts(html, "\">");
+ }
+
+ escape_html(html, cur->string_content.ptr, cur->string_content.size);
+ break;
+ }
+
+ case NODE_HTML:
+ strbuf_put(html, cur->string_content.ptr, cur->string_content.size);
+ break;
+
+ case NODE_HRULE:
+ strbuf_puts(html, "<hr />\n");
+ break;
+
+ case NODE_REFERENCE_DEF:
+ break;
+
case NODE_STRING:
- escape_html(html, ils->as.literal.data, ils->as.literal.len);
+ escape_html(html, cur->as.literal.data, cur->as.literal.len);
break;
case NODE_LINEBREAK:
@@ -153,217 +205,154 @@ static void inlines_to_html(strbuf *html, cmark_node* ils)
case NODE_INLINE_CODE:
strbuf_puts(html, "<code>");
- escape_html(html, ils->as.literal.data, ils->as.literal.len);
- strbuf_puts(html, "</code>");
+ escape_html(html, cur->as.literal.data, cur->as.literal.len);
break;
case NODE_INLINE_HTML:
strbuf_put(html,
- ils->as.literal.data,
- ils->as.literal.len);
+ cur->as.literal.data,
+ cur->as.literal.len);
break;
case NODE_LINK:
strbuf_puts(html, "<a href=\"");
- if (ils->as.link.url)
- escape_href(html, ils->as.link.url, -1);
+ if (cur->as.link.url)
+ escape_href(html, cur->as.link.url, -1);
- if (ils->as.link.title) {
+ if (cur->as.link.title) {
strbuf_puts(html, "\" title=\"");
- escape_html(html, ils->as.link.title, -1);
+ escape_html(html, cur->as.link.title, -1);
}
strbuf_puts(html, "\">");
- visit_children = true;
- rstack = push_render_stack(rstack, ils->next, "</a>");
break;
case NODE_IMAGE:
strbuf_puts(html, "<img src=\"");
- if (ils->as.link.url)
- escape_href(html, ils->as.link.url, -1);
+ if (cur->as.link.url)
+ escape_href(html, cur->as.link.url, -1);
strbuf_puts(html, "\" alt=\"");
- inlines_to_plain_html(html, ils->first_child);
+ inlines_to_plain_html(html, cur);
- if (ils->as.link.title) {
+ if (cur->as.link.title) {
strbuf_puts(html, "\" title=\"");
- escape_html(html, ils->as.link.title, -1);
+ escape_html(html, cur->as.link.title, -1);
}
strbuf_puts(html, "\" />");
+ visit_children = false;
break;
case NODE_STRONG:
strbuf_puts(html, "<strong>");
- visit_children = true;
- rstack = push_render_stack(rstack, ils->next, "</strong>");
break;
case NODE_EMPH:
strbuf_puts(html, "<em>");
- visit_children = true;
- rstack = push_render_stack(rstack, ils->next, "</em>");
break;
+
default:
- break;
+ assert(false);
}
- if (visit_children) {
- ils = ils->first_child;
- } else {
- ils = ils->next;
+
+ if (visit_children && cur->first_child) {
+ cur = cur->first_child;
+ continue;
+ }
+
+ next_sibling:
+ tight = finish_node(html, cur, tight);
+ if (cur == node) {
+ break;
}
- while (ils == NULL && rstack != NULL) {
- strbuf_puts(html, rstack->literal);
- ils = rstack->next_sibling;
- rstack = pop_render_stack(rstack);
+ if (cur->next) {
+ cur = cur->next;
+ continue;
}
+ cur = cur->parent;
+ goto next_sibling;
}
-
- free_render_stack(rstack);
}
-// Convert a cmark_node list to HTML. Returns 0 on success, and sets result.
-static void blocks_to_html(strbuf *html, cmark_node *b)
+// Returns the restored value of 'tight'.
+static bool
+finish_node(strbuf *html, cmark_node *node, bool tight)
{
- cmark_list *data;
- render_stack* rstack = NULL;
- bool visit_children = false;
- bool tight = false;
-
- while(b != NULL) {
- visit_children = false;
- switch(b->type) {
- case NODE_DOCUMENT:
- rstack = push_render_stack(rstack, b->next, "");
- rstack->tight = false;
- rstack->trim = false;
- visit_children = true;
- break;
-
- case NODE_PARAGRAPH:
- if (tight) {
- inlines_to_html(html, b->first_child);
- } else {
- cr(html);
- strbuf_puts(html, "<p>");
- inlines_to_html(html, b->first_child);
- strbuf_puts(html, "</p>\n");
- }
- break;
+ char end_header[] = "</h0>\n";
- case NODE_BQUOTE:
- cr(html);
- strbuf_puts(html, "<blockquote>\n");
- rstack = push_render_stack(rstack, b->next, "</blockquote>\n");
- rstack->tight = tight;
- rstack->trim = false;
- tight = false;
- visit_children = true;
- break;
-
- case NODE_LIST_ITEM:
- cr(html);
- strbuf_puts(html, "<li>");
- rstack = push_render_stack(rstack, b->next, "</li>\n");
- rstack->tight = tight;
- rstack->trim = true;
- visit_children = true;
- break;
-
- case NODE_LIST:
- // make sure a list starts at the beginning of the line:
- cr(html);
- data = &(b->as.list);
-
- if (data->start > 1) {
- strbuf_printf(html, "<%s start=\"%d\">\n",
- data->list_type == CMARK_BULLET_LIST ? "ul" : "ol",
- data->start);
- } else {
- strbuf_puts(html, data->list_type == CMARK_BULLET_LIST ? "<ul>\n" : "<ol>\n");
- }
-
- rstack = push_render_stack(rstack, b->next,
- data->list_type == CMARK_BULLET_LIST ?
- "\n</ul>\n" : "\n</ol>\n");
- rstack->tight = tight;
- rstack->trim = false;
- tight = data->tight;
- visit_children = true;
- break;
-
- case NODE_ATX_HEADER:
- case NODE_SETEXT_HEADER:
- cr(html);
- strbuf_printf(html, "<h%d>", b->as.header.level);
- inlines_to_html(html, b->first_child);
- strbuf_printf(html, "</h%d>\n", b->as.header.level);
- break;
-
- case NODE_INDENTED_CODE:
- case NODE_FENCED_CODE:
- cr(html);
-
- strbuf_puts(html, "<pre><code");
+ switch (node->type) {
+ case NODE_PARAGRAPH:
+ if (!tight) {
+ strbuf_puts(html, "</p>\n");
+ }
+ break;
+
+ case NODE_BQUOTE: {
+ cmark_list *list = &node->as.list;
+ strbuf_puts(html, "</blockquote>\n");
+ // Restore old 'tight' value.
+ tight = list->tight;
+ list->tight = false;
+ break;
+ }
- if (b->type == NODE_FENCED_CODE) {
- strbuf *info = &b->as.code.info;
+ case NODE_LIST_ITEM:
+ strbuf_puts(html, "</li>\n");
+ break;
+
+ case NODE_LIST: {
+ cmark_list *list = &node->as.list;
+ bool tmp;
+ strbuf_puts(html,
+ list->list_type == CMARK_BULLET_LIST ?
+ "</ul>\n" : "</ol>\n");
+ // Restore old 'tight' value.
+ tmp = tight;
+ tight = list->tight;
+ list->tight = tmp;
+ break;
+ }
- if (strbuf_len(info) > 0) {
- int first_tag = strbuf_strchr(info, ' ', 0);
- if (first_tag < 0)
- first_tag = strbuf_len(info);
+ case NODE_ATX_HEADER:
+ case NODE_SETEXT_HEADER:
+ end_header[3] = '0' + node->as.header.level;
+ strbuf_puts(html, end_header);
+ break;
- strbuf_puts(html, " class=\"language-");
- escape_html(html, info->ptr, first_tag);
- strbuf_putc(html, '"');
- }
- }
+ case NODE_INDENTED_CODE:
+ case NODE_FENCED_CODE:
+ strbuf_puts(html, "</code></pre>\n");
+ break;
- strbuf_putc(html, '>');
- escape_html(html, b->string_content.ptr, b->string_content.size);
- strbuf_puts(html, "</code></pre>\n");
- break;
+ case NODE_INLINE_CODE:
+ strbuf_puts(html, "</code>");
+ break;
- case NODE_HTML:
- strbuf_put(html, b->string_content.ptr, b->string_content.size);
- break;
+ case NODE_LINK:
+ strbuf_puts(html, "</a>");
+ break;
- case NODE_HRULE:
- strbuf_puts(html, "<hr />\n");
- break;
+ case NODE_STRONG:
+ strbuf_puts(html, "</strong>");
+ break;
- case NODE_REFERENCE_DEF:
- break;
+ case NODE_EMPH:
+ strbuf_puts(html, "</em>");
+ break;
- default:
- assert(false);
- }
- if (visit_children) {
- b = b->first_child;
- } else {
- b = b->next;
- }
- while (b == NULL && rstack != NULL) {
- strbuf_puts(html, rstack->literal);
- if (rstack->trim) {
- strbuf_rtrim(html);
- }
- tight = rstack->tight;
- b = rstack->next_sibling;
- rstack = pop_render_stack(rstack);
- }
+ default:
+ break;
}
- free_render_stack(rstack);
+ return tight;
}
unsigned char *cmark_render_html(cmark_node *root)
{
unsigned char *result;
strbuf html = GH_BUF_INIT;
- blocks_to_html(&html, root);
+ node_to_html(&html, root);
result = strbuf_detach(&html);
strbuf_free(&html);
return result;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-27 17:45:08 +0000