From 176fcc8b35a44b76edad95f795f6d19a68cc6ecc Mon Sep 17 00:00:00 2001
From: debuggio <eugeniy.timofeev@gmail.com>
Date: Tue, 7 Mar 2017 11:55:50 -0800
Subject: [PATCH] Added nolinks flag to skip links during rendering

---
 fuzzing/snudown-validator.c | 16 ++++++++++
 snudown.c                   | 16 ++++++++++
 test_snudown.py             | 64 +++++++++++++++++++++++++++++++++++++
 3 files changed, 96 insertions(+)

diff --git a/fuzzing/snudown-validator.c b/fuzzing/snudown-validator.c
index 153e1c4..0a6f89a 100644
--- a/fuzzing/snudown-validator.c
+++ b/fuzzing/snudown-validator.c
@@ -22,6 +22,7 @@
 enum snudown_renderer_mode {
 	RENDERER_USERTEXT = 0,
 	RENDERER_WIKI,
+	RENDERER_USERTEXT_WITHOUTLINKS,
 	RENDERER_COUNT
 };
 
@@ -60,6 +61,12 @@ static const unsigned int snudown_default_md_flags =
 	MKDEXT_STRIKETHROUGH |
 	MKDEXT_TABLES;
 
+static const unsigned int snudown_default_md_flags_without_links =
+	MKDEXT_NO_INTRA_EMPHASIS |
+	MKDEXT_SUPERSCRIPT |
+	MKDEXT_STRIKETHROUGH |
+	MKDEXT_TABLES;
+
 static const unsigned int snudown_default_render_flags =
 	HTML_SKIP_HTML |
 	HTML_SKIP_IMAGES |
@@ -129,6 +136,14 @@ void init_wiki_renderer() {
 	sundown[RENDERER_WIKI].toc_state = &wiki_toc_state;
 }
 
+void init_default_renderer_without_links(PyObject *module) {
+	PyModule_AddIntConstant(module, "RENDERER_USERTEXT_WITHOUTLINKS", RENDERER_USERTEXT_WITHOUTLINKS);
+	sundown[RENDERER_USERTEXT_WITHOUTLINKS].main_renderer = make_custom_renderer(&usertext_state, snudown_default_render_flags, snudown_default_md_flags_without_links, 0);
+	sundown[RENDERER_USERTEXT_WITHOUTLINKS].toc_renderer = make_custom_renderer(&usertext_toc_state, snudown_default_render_flags, snudown_default_md_flags_without_links, 1);
+	sundown[RENDERER_USERTEXT_WITHOUTLINKS].state = &usertext_state;
+	sundown[RENDERER_USERTEXT_WITHOUTLINKS].toc_state = &usertext_toc_state;
+}
+
 void
 snudown_md(struct buf *ob, const uint8_t *document, size_t doc_size, int wiki_mode)
 {
@@ -172,6 +187,7 @@ main(int argc, char **argv)
 {
 	init_default_renderer();
 	init_wiki_renderer();
+	init_default_renderer_without_links(module);
 
 	struct buf *ib, *ob;
 	int size_read = 0, wiki_mode = 0, i = 0, have_errors = 0;
diff --git a/snudown.c b/snudown.c
index e268f66..be4ae27 100644
--- a/snudown.c
+++ b/snudown.c
@@ -10,6 +10,7 @@
 enum snudown_renderer_mode {
 	RENDERER_USERTEXT = 0,
 	RENDERER_WIKI,
+	RENDERER_USERTEXT_WITHOUTLINKS,
 	RENDERER_COUNT
 };
 
@@ -52,6 +53,12 @@ static const unsigned int snudown_default_md_flags =
 	MKDEXT_STRIKETHROUGH |
 	MKDEXT_TABLES;
 
+static const unsigned int snudown_default_md_flags_without_links =
+	MKDEXT_NO_INTRA_EMPHASIS |
+	MKDEXT_SUPERSCRIPT |
+	MKDEXT_STRIKETHROUGH |
+	MKDEXT_TABLES;
+
 static const unsigned int snudown_default_render_flags =
 	HTML_SKIP_HTML |
 	HTML_SKIP_IMAGES |
@@ -123,6 +130,14 @@ void init_wiki_renderer(PyObject *module) {
 	sundown[RENDERER_WIKI].toc_state = &wiki_toc_state;
 }
 
+void init_default_renderer_without_links(PyObject *module) {
+	PyModule_AddIntConstant(module, "RENDERER_USERTEXT_WITHOUTLINKS", RENDERER_USERTEXT_WITHOUTLINKS);
+	sundown[RENDERER_USERTEXT_WITHOUTLINKS].main_renderer = make_custom_renderer(&usertext_state, snudown_default_render_flags, snudown_default_md_flags_without_links, 0);
+	sundown[RENDERER_USERTEXT_WITHOUTLINKS].toc_renderer = make_custom_renderer(&usertext_toc_state, snudown_default_render_flags, snudown_default_md_flags_without_links, 1);
+	sundown[RENDERER_USERTEXT_WITHOUTLINKS].state = &usertext_state;
+	sundown[RENDERER_USERTEXT_WITHOUTLINKS].toc_state = &usertext_toc_state;
+}
+
 static PyObject *
 snudown_md(PyObject *self, PyObject *args, PyObject *kwargs)
 {
@@ -206,6 +221,7 @@ PyMODINIT_FUNC initsnudown(void)
 
 	init_default_renderer(module);
 	init_wiki_renderer(module);
+	init_default_renderer_without_links(module);
 
 	/* Version */
 	PyModule_AddStringConstant(module, "__version__", SNUDOWN_VERSION);
diff --git a/test_snudown.py b/test_snudown.py
index fa9568f..d0d0cb3 100644
--- a/test_snudown.py
+++ b/test_snudown.py
@@ -422,6 +422,64 @@
         '<p><table scope="foo"></p>\n',
 }
 
+
+no_links_cases = {
+    'http://www.reddit.com':
+        '<p>http://www.reddit.com</p>\n',
+
+    'http://www.reddit.com/a\x00b':
+        '<p>http://www.reddit.com/ab</p>\n',
+
+    'ampersands http://www.google.com?test&blah':
+        '<p>ampersands http://www.google.com?test&amp;blah</p>\n',
+
+    'www.http://example.com/':
+        '<p>www.http://example.com/</p>\n',
+
+    'foo@example.com':
+        '<p>foo@example.com</p>\n', 
+        
+    '/u/test/m/test test':
+        '<p>/u/test/m/test test</p>\n',
+
+    '/u/test':
+        '<p>/u/test</p>\n',
+
+    '/r/not.cool':
+        '<p>/r/not.cool</p>\n',
+
+    'u/test':
+        '<p>u/test</p>\n',
+
+    '/r/whatever: fork':
+        '<p>/r/whatever: fork</p>\n',
+
+    '/r/t:timereddit':
+        '<p>/r/t:timereddit</p>\n',
+
+    '/r/reddit.com':
+        '<p>/r/reddit.com</p>\n',
+
+    'r/not.cool':
+        '<p>r/not.cool</p>\n',
+
+    '/r/very+clever+multireddit+reddit.com+t:fork+yay':
+        '<p>/r/very+clever+multireddit+reddit.com+t:fork+yay</p>\n',
+
+    '/r/t:heatdeathoftheuniverse':
+        '<p>/r/t:heatdeathoftheuniverse</p>\n',
+
+    '/r/all-minus-something':
+        '<p>/r/all-minus-something</p>\n',
+
+    r'escaped \/r/test':
+        '<p>escaped /r/test</p>\n',
+
+    'Words words /r/test words':
+        '<p>Words words /r/test words</p>\n',
+}
+
+
 class SnudownTestCase(unittest.TestCase):
     def __init__(self, renderer=snudown.RENDERER_USERTEXT):
         self.renderer = renderer
@@ -458,4 +516,10 @@ def test_snudown():
         case.expected_output = expected_output
         suite.addTest(case)
 
+    for input, expected_output in no_links_cases.iteritems():
+        case = SnudownTestCase(renderer=snudown.RENDERER_USERTEXT_WITHOUTLINKS)
+        case.input = input
+        case.expected_output = expected_output
+        suite.addTest(case)        
+
     return suite