From: Hiroshi Shirosaki <h.shirosaki@gmail.com>
Date: Fri, 5 Feb 2016 09:52:55 +0000 (+0900)
Subject: Merge pull request #252 from alexconst/feat/emphasis_singleline
X-Git-Url: https://git.madduck.net/etc/vim.git/commitdiff_plain/7501816f7befaee111f9fe9b87e5a1f6acfb23e4?hp=7bfbcf41b6c2578fff0b14bf23c65d139bb81094

Merge pull request #252 from alexconst/feat/emphasis_singleline

Add option for singleline emphasis
---

diff --git a/README.md b/README.md
index 6780572..73b7931 100644
--- a/README.md
+++ b/README.md
@@ -113,6 +113,13 @@ It never increases its default size (half screen), it only shrinks.
 let g:vim_markdown_toc_autofit = 1
 ```
 
+### Text emphasis restriction to single-lines
+
+By default text emphasis works across multiple lines until a closing token is found. However, it's possible to restrict text emphasis to a single line (ie, for it to be applied a closing token must be found on the same line). To do so:
+```vim
+let g:vim_markdown_emphasis_multiline = 0
+```
+
 ### Syntax Concealing
 
 Concealing is set for some syntax.
diff --git a/syntax/markdown.vim b/syntax/markdown.vim
index 6bf576f..ee954e0 100644
--- a/syntax/markdown.vim
+++ b/syntax/markdown.vim
@@ -42,12 +42,17 @@ if has('conceal')
 endif
 
 "additions to HTML groups
-syn region htmlItalic start="\%(^\|\s\)\zs\*\ze[^\\\*\t ]" end="[^\\\*\t ]\zs\*\ze\_W" keepend
-syn region htmlItalic start="\%(^\|\s\)\zs_\ze[^\\_\t ]" end="[^\\_\t ]\zs_\ze\_W" keepend
-syn region htmlBold start="\*\*\ze\S" end="\S\zs\*\*" keepend
-syn region htmlBold start="__\ze\S" end="\S\zs__" keepend
-syn region htmlBoldItalic start="\*\*\*\ze\S" end="\S\zs\*\*\*" keepend
-syn region htmlBoldItalic start="___\ze\S" end="\S\zs___" keepend
+if get(g:, "vim_markdown_emphasis_multiline", 1)
+    let oneline = ""
+else
+    let oneline = " oneline"
+endif
+execute 'syn region htmlItalic start="\%(^\|\s\)\zs\*\ze[^\\\*\t ]" end="[^\\\*\t ]\zs\*\ze\_W" keepend' . oneline
+execute 'syn region htmlItalic start="\%(^\|\s\)\zs_\ze[^\\_\t ]" end="[^\\_\t ]\zs_\ze\_W" keepend' . oneline
+execute 'syn region htmlBold start="\*\*\ze\S" end="\S\zs\*\*" keepend' . oneline
+execute 'syn region htmlBold start="__\ze\S" end="\S\zs__" keepend' . oneline
+execute 'syn region htmlBoldItalic start="\*\*\*\ze\S" end="\S\zs\*\*\*" keepend' . oneline
+execute 'syn region htmlBoldItalic start="___\ze\S" end="\S\zs___" keepend' . oneline
 
 " [link](URL) | [link][id] | [link][] | ![image](URL)
 syn region mkdFootnotes matchgroup=mkdDelimiter start="\[^"    end="\]"
diff --git a/test/syntax-singleline.vader b/test/syntax-singleline.vader
new file mode 100644
index 0000000..9fde407
--- /dev/null
+++ b/test/syntax-singleline.vader
@@ -0,0 +1,158 @@
+Before:
+  let g:vim_markdown_emphasis_multiline = 0
+  syn off | syn on
+
+After:
+  let g:vim_markdown_emphasis_multiline = 1
+  syn off | syn on
+
+Given markdown;
+a **b** c
+
+Execute (bold):
+  AssertNotEqual SyntaxOf('a'), 'htmlBold'
+  AssertEqual SyntaxOf('b'), 'htmlBold'
+  AssertNotEqual SyntaxOf('c'), 'htmlBold'
+
+Given markdown;
+a __b__ c
+
+Execute (bold):
+  AssertNotEqual SyntaxOf('a'), 'htmlBold'
+  AssertEqual SyntaxOf('b'), 'htmlBold'
+  AssertNotEqual SyntaxOf('c'), 'htmlBold'
+
+Given markdown;
+a *b* c
+
+Execute (italic):
+  AssertNotEqual SyntaxOf('a'), 'htmlItalic'
+  AssertEqual SyntaxOf('b'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('c'), 'htmlItalic'
+
+Given markdown;
+a _b_ c
+
+Execute (italic):
+  AssertNotEqual SyntaxOf('a'), 'htmlItalic'
+  AssertEqual SyntaxOf('b'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('c'), 'htmlItalic'
+
+Given markdown;
+_a_b_
+
+Execute (italic text has underscores):
+  AssertEqual SyntaxOf('a'), 'htmlItalic'
+  AssertEqual SyntaxOf('b'), 'htmlItalic'
+
+Given markdown;
+a \*b\* c
+
+Execute (not italic with escaped asterisks):
+  AssertNotEqual SyntaxOf('a'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('b'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('c'), 'htmlItalic'
+
+Given markdown;
+a \_b\_ c
+
+Execute (not italic with escaped underscores):
+  AssertNotEqual SyntaxOf('a'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('b'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('c'), 'htmlItalic'
+
+Given markdown;
+a _b\_c_ d
+
+Execute (italic with escaped underscores):
+  AssertNotEqual SyntaxOf('a'), 'htmlItalic'
+  AssertEqual SyntaxOf('b'), 'htmlItalic'
+  AssertEqual SyntaxOf('c'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('d'), 'htmlItalic'
+
+Given markdown;
+a_b_c
+
+Execute (not italic underscores within text):
+  AssertNotEqual SyntaxOf('a'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('b'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('c'), 'htmlItalic'
+
+Given markdown;
+a *b\*c* d
+
+Execute (italic with escaped asterisks):
+  AssertNotEqual SyntaxOf('a'), 'htmlItalic'
+  AssertEqual SyntaxOf('b'), 'htmlItalic'
+  AssertEqual SyntaxOf('c'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('d'), 'htmlItalic'
+
+Given markdown;
+a __b\_\_c__ d
+
+Execute (bold with escaped underscores):
+  AssertNotEqual SyntaxOf('a'), 'htmlBold'
+  AssertEqual SyntaxOf('b'), 'htmlBold'
+  AssertEqual SyntaxOf('c'), 'htmlBold'
+  AssertNotEqual SyntaxOf('d'), 'htmlBold'
+
+Given markdown;
+_a b
+c_ d
+
+Execute (italic with underscores in multiple lines):
+  AssertNotEqual SyntaxOf('a'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('b'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('c'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('d'), 'htmlItalic'
+
+Given markdown;
+__a b
+c__ d
+
+Execute (bold with underscores in multiple lines):
+  AssertNotEqual SyntaxOf('a'), 'htmlBold'
+  AssertNotEqual SyntaxOf('b'), 'htmlBold'
+  AssertNotEqual SyntaxOf('c'), 'htmlBold'
+  AssertNotEqual SyntaxOf('d'), 'htmlBold'
+
+Given markdown;
+___a b
+c___ d
+
+Execute (bold italic with underscores in multiple lines):
+  AssertNotEqual SyntaxOf('a'), 'htmlBoldItalic'
+  AssertNotEqual SyntaxOf('b'), 'htmlBoldItalic'
+  AssertNotEqual SyntaxOf('c'), 'htmlBoldItalic'
+  AssertNotEqual SyntaxOf('d'), 'htmlBoldItalic'
+
+Given markdown;
+*a b
+c* d
+
+Execute (italic with asterisks in multiple lines):
+  AssertNotEqual SyntaxOf('a'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('b'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('c'), 'htmlItalic'
+  AssertNotEqual SyntaxOf('d'), 'htmlItalic'
+
+Given markdown;
+**a b
+c** d
+
+Execute (bold with asterisks in multiple lines):
+  AssertNotEqual SyntaxOf('a'), 'htmlBold'
+  AssertNotEqual SyntaxOf('b'), 'htmlBold'
+  AssertNotEqual SyntaxOf('c'), 'htmlBold'
+  AssertNotEqual SyntaxOf('d'), 'htmlBold'
+
+Given markdown;
+***a b
+c*** d
+
+Execute (bold italic with asterisks in multiple lines):
+  AssertNotEqual SyntaxOf('a'), 'htmlBoldItalic'
+  AssertNotEqual SyntaxOf('b'), 'htmlBoldItalic'
+  AssertNotEqual SyntaxOf('c'), 'htmlBoldItalic'
+  AssertNotEqual SyntaxOf('d'), 'htmlBoldItalic'
+