From c28af79329264a7cf331a1b1c414919e4ed9e9f9 Mon Sep 17 00:00:00 2001
From: Vicent Marti <tanoku@gmail.com>
Date: Tue, 2 Sep 2014 13:37:34 +0200
Subject: It buiiiilds

---
 src/html/html.c | 212 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 212 insertions(+)
 create mode 100644 src/html/html.c

(limited to 'src/html/html.c')

diff --git a/src/html/html.c b/src/html/html.c
new file mode 100644
index 0000000..2f160ca
--- /dev/null
+++ b/src/html/html.c
@@ -0,0 +1,212 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <assert.h>
+
+#include "stmd.h"
+#include "debug.h"
+#include "scanners.h"
+#include "html/houdini.h"
+
+// Functions to convert block and inline lists to HTML strings.
+
+static void escape_html(gh_buf *dest, const unsigned char *source, int length)
+{
+	if (length < 0)
+		length = strlen((char *)source);
+
+	houdini_escape_html0(dest, source, (size_t)length, 0);
+}
+
+static void escape_href(gh_buf *dest, const unsigned char *source, int length)
+{
+	if (length < 0)
+		length = strlen((char *)source);
+
+	houdini_escape_href(dest, source, (size_t)length);
+}
+
+static inline void cr(gh_buf *html)
+{
+	if (html->size && html->ptr[html->size - 1] != '\n')
+		gh_buf_putc(html, '\n');
+}
+
+// Convert a block list to HTML.  Returns 0 on success, and sets result.
+void blocks_to_html(gh_buf *html, block *b, bool tight)
+{
+	struct ListData *data;
+
+	while(b != NULL) {
+		switch(b->tag) {
+			case document:
+				blocks_to_html(html, b->children, false);
+				break;
+
+			case paragraph:
+				if (tight) {
+					inlines_to_html(html, b->inline_content);
+				} else {
+					cr(html);
+					gh_buf_puts(html, "<p>");
+					inlines_to_html(html, b->inline_content);
+					gh_buf_puts(html, "</p>");
+					cr(html);
+				}
+				break;
+
+			case block_quote:
+				cr(html);
+				gh_buf_puts(html, "<blockquote>");
+				blocks_to_html(html, b->children, false);
+				gh_buf_puts(html, "</blockquote>");
+				cr(html);
+				break;
+
+			case list_item:
+				cr(html);
+				gh_buf_puts(html, "<li>");
+				blocks_to_html(html, b->children, tight);
+				gh_buf_trim(html);
+				gh_buf_puts(html, "</li>");
+				cr(html);
+				break;
+
+			case list:
+				// make sure a list starts at the beginning of the line:
+				cr(html);
+				data = &(b->attributes.list_data);
+
+				if (data->start > 1) {
+					gh_buf_printf(html, "<%s start=\"%d\">\n",
+							data->list_type == bullet ? "ul" : "ol",
+							data->start);
+				} else {
+					gh_buf_puts(html, data->list_type == bullet ? "<ul>\n" : "<ol>\n");
+				}
+
+				blocks_to_html(html, b->children, data->tight);
+				gh_buf_puts(html, data->list_type == bullet ? "</ul>" : "</ol>");
+				cr(html);
+				break;
+
+			case atx_header:
+			case setext_header:
+				cr(html);
+				gh_buf_printf(html, "<h%d>", b->attributes.header_level);
+				inlines_to_html(html, b->inline_content);
+				gh_buf_printf(html, "</h%d>", b->attributes.header_level);
+				cr(html);
+				break;
+
+			case indented_code:
+			case fenced_code:
+				/* TODO: fenced code lang attributes */
+				cr(html);
+				gh_buf_puts(html, "<pre><code>");
+				escape_html(html, b->string_content.ptr, b->string_content.size);
+				gh_buf_puts(html, "</pre></code>");
+				cr(html);
+				break;
+
+			case html_block:
+				gh_buf_put(html, b->string_content.ptr, b->string_content.size);
+				break;
+
+			case hrule:
+				gh_buf_puts(html, "<hr />");
+				cr(html);
+				break;
+
+			case reference_def:
+				break;
+
+			default:
+				assert(false);
+		}
+
+		b = b->next;
+	}
+}
+
+// Convert an inline list to HTML.  Returns 0 on success, and sets result.
+void inlines_to_html(gh_buf *html, inl* ils)
+{
+	gh_buf scrap = GH_BUF_INIT;
+
+	while(ils != NULL) {
+		switch(ils->tag) {
+			case INL_STRING:
+				escape_html(html, ils->content.literal.data, ils->content.literal.len);
+				break;
+
+			case INL_LINEBREAK:
+				gh_buf_puts(html, "<br />\n");
+				break;
+
+			case INL_SOFTBREAK:
+				gh_buf_putc(html, '\n');
+				break;
+
+			case INL_CODE:
+				gh_buf_puts(html, "<code>");
+				escape_html(html, ils->content.literal.data, ils->content.literal.len);
+				gh_buf_puts(html, "</code>");
+				break;
+
+			case INL_RAW_HTML:
+			case INL_ENTITY:
+				gh_buf_put(html,
+						ils->content.literal.data,
+						ils->content.literal.len);
+				break;
+
+			case INL_LINK:
+				gh_buf_puts(html, "<a href=\"");
+				escape_href(html, ils->content.linkable.url, -1);
+
+				if (ils->content.linkable.title) {
+					gh_buf_puts(html, "\" title=\"");
+					escape_html(html, ils->content.linkable.title, -1);
+				}
+
+				gh_buf_puts(html, "\">");
+				inlines_to_html(html, ils->content.inlines);
+				gh_buf_puts(html, "</a>");
+				break;
+
+			case INL_IMAGE:
+				gh_buf_puts(html, "<img src=\"");
+				escape_href(html, ils->content.linkable.url, -1);
+
+				inlines_to_html(&scrap, ils->content.inlines);
+				if (scrap.size) {
+					gh_buf_puts(html, "\" alt=\"");
+					escape_html(html, scrap.ptr, scrap.size);
+				}
+				gh_buf_clear(&scrap);
+
+				if (ils->content.linkable.title) {
+					gh_buf_puts(html, "\" title=\"");
+					escape_html(html, ils->content.linkable.title, -1);
+				}
+
+				gh_buf_puts(html, "\"/>");
+				break;
+
+			case INL_STRONG:
+				gh_buf_puts(html, "<strong>");
+				inlines_to_html(html, ils->content.inlines);
+				gh_buf_puts(html, "</strong>");
+				break;
+
+			case INL_EMPH:
+				gh_buf_puts(html, "<em>");
+				inlines_to_html(html, ils->content.inlines);
+				gh_buf_puts(html, "</em>");
+				break;
+		}
+		ils = ils->next;
+	}
+}
-- 
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