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// Copyright 2014 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package markup
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import (
"bytes"
"fmt"
"path"
"path/filepath"
"regexp"
"strings"
"github.com/russross/blackfriday"
"github.com/gogits/gogs/pkg/tool"
"github.com/gogits/gogs/pkg/setting"
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)
// IsMarkdownFile reports whether name looks like a Markdown file based on its extension.
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func IsMarkdownFile(name string) bool {
Squashed commit of the following: commit 0afcb843d7ffd596991c4885cab768273a6eb42c Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 17:13:29 2016 -0600 Removed Upload stats as the upload table is just a temporary table commit 7ecd73ff5535612d79d471409173ee7f1fcfa157 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 08:42:41 2016 -0600 Fix for CodeMirror mode commit c29b9ab531e2e7af0fb5db24dc17e51027dd1174 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 08:03:33 2016 -0600 Made tabbing in editor use spaces commit 23af384c53206a8a40e11e45bf49d7a149c4adcd Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 07:56:46 2016 -0600 Fix for data-url commit cfb8a97591cb6fc0a92e49563b7b764c524db0e9 Merge: 7fc8a89 991ce42 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 07:42:53 2016 -0600 Merge remote-tracking branch 'gogits/develop' into feature-create-and-edit-repo-file Conflicts: modules/bindata/bindata.go public/js/gogs.js commit 7fc8a89cb495478225b02d613e647f99a1489634 Merge: fd3d86c c03d040 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 07:40:00 2016 -0600 Merge branch 'feature-create-and-edit-repo-file' of github.com:richmahn/gogs into feature-create-and-edit-repo-file commit fd3d86ca6bbc02cfda566a504ffd6b03db4f75ef Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 07:39:44 2016 -0600 Code cleanup commit c03d0401c1049eeeccc32ab1f9c3303c130be5ee Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Fri Jul 29 15:38:23 2016 -0600 Code cleanup commit 98e1206ccf9f9a4503c020e3a7830cf9f861dfae Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Thu Jul 28 18:36:01 2016 -0600 Code cleanup and fixes commit c2895dc742f25f8412879c9fa15e18f27f42f194 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Thu Jul 28 18:24:04 2016 -0600 Fixes per Unknwon's requests commit 6aa7e46b21ad4c96e562daa2eac26a8fb408f8ef Merge: 889e9fa ad7ea88 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Thu Jul 28 17:13:43 2016 -0600 Merge remote-tracking branch 'gogits/develop' into feature-create-and-edit-repo-file Conflicts: modules/bindata/bindata.go modules/setting/setting.go commit 889e9faf1bd8559a4979c8f46005d488c1a234d4 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Fri Jul 22 14:09:18 2016 -0600 Fix in gogs.js commit 47603edf223f147b114be65f3bd27bc1e88827a5 Merge: bb57912 cf85e9e Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Fri Jul 22 14:07:36 2016 -0600 Merge remote-tracking branch 'gogits/develop' into feature-create-and-edit-repo-file Conflicts: modules/bindata/bindata.go public/js/gogs.js commit bb5791255867a71c11a77b639db050ad09c597a4 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Fri Jul 22 14:02:18 2016 -0600 Update for using CodeMirror mode addon commit d10d128c51039be19e2af9c66c63db66a9f2ec6d Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Tue Jul 19 16:12:57 2016 -0600 Update for Edit commit 34a34982025144e3225e389f7849eb6273c1d576 Merge: fa1b752 1c7dcdd Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Tue Jul 19 11:52:02 2016 -0600 Merge remote-tracking branch 'gogits/develop' into feature-create-and-edit-repo-file Conflicts: modules/bindata/bindata.go commit fa1b752be29cd455c5184ddac2ffe80b3489763e Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Fri Jul 15 18:35:42 2016 -0600 Feature for editing, creating, uploading and deleting files
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extension := strings.ToLower(filepath.Ext(name))
for _, ext := range setting.Markdown.FileExtensions {
Squashed commit of the following: commit 0afcb843d7ffd596991c4885cab768273a6eb42c Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 17:13:29 2016 -0600 Removed Upload stats as the upload table is just a temporary table commit 7ecd73ff5535612d79d471409173ee7f1fcfa157 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 08:42:41 2016 -0600 Fix for CodeMirror mode commit c29b9ab531e2e7af0fb5db24dc17e51027dd1174 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 08:03:33 2016 -0600 Made tabbing in editor use spaces commit 23af384c53206a8a40e11e45bf49d7a149c4adcd Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 07:56:46 2016 -0600 Fix for data-url commit cfb8a97591cb6fc0a92e49563b7b764c524db0e9 Merge: 7fc8a89 991ce42 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 07:42:53 2016 -0600 Merge remote-tracking branch 'gogits/develop' into feature-create-and-edit-repo-file Conflicts: modules/bindata/bindata.go public/js/gogs.js commit 7fc8a89cb495478225b02d613e647f99a1489634 Merge: fd3d86c c03d040 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 07:40:00 2016 -0600 Merge branch 'feature-create-and-edit-repo-file' of github.com:richmahn/gogs into feature-create-and-edit-repo-file commit fd3d86ca6bbc02cfda566a504ffd6b03db4f75ef Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Sun Jul 31 07:39:44 2016 -0600 Code cleanup commit c03d0401c1049eeeccc32ab1f9c3303c130be5ee Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Fri Jul 29 15:38:23 2016 -0600 Code cleanup commit 98e1206ccf9f9a4503c020e3a7830cf9f861dfae Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Thu Jul 28 18:36:01 2016 -0600 Code cleanup and fixes commit c2895dc742f25f8412879c9fa15e18f27f42f194 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Thu Jul 28 18:24:04 2016 -0600 Fixes per Unknwon's requests commit 6aa7e46b21ad4c96e562daa2eac26a8fb408f8ef Merge: 889e9fa ad7ea88 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Thu Jul 28 17:13:43 2016 -0600 Merge remote-tracking branch 'gogits/develop' into feature-create-and-edit-repo-file Conflicts: modules/bindata/bindata.go modules/setting/setting.go commit 889e9faf1bd8559a4979c8f46005d488c1a234d4 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Fri Jul 22 14:09:18 2016 -0600 Fix in gogs.js commit 47603edf223f147b114be65f3bd27bc1e88827a5 Merge: bb57912 cf85e9e Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Fri Jul 22 14:07:36 2016 -0600 Merge remote-tracking branch 'gogits/develop' into feature-create-and-edit-repo-file Conflicts: modules/bindata/bindata.go public/js/gogs.js commit bb5791255867a71c11a77b639db050ad09c597a4 Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Fri Jul 22 14:02:18 2016 -0600 Update for using CodeMirror mode addon commit d10d128c51039be19e2af9c66c63db66a9f2ec6d Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Tue Jul 19 16:12:57 2016 -0600 Update for Edit commit 34a34982025144e3225e389f7849eb6273c1d576 Merge: fa1b752 1c7dcdd Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Tue Jul 19 11:52:02 2016 -0600 Merge remote-tracking branch 'gogits/develop' into feature-create-and-edit-repo-file Conflicts: modules/bindata/bindata.go commit fa1b752be29cd455c5184ddac2ffe80b3489763e Author: Richard Mahn <richard_mahn@wycliffeassociates.org> Date: Fri Jul 15 18:35:42 2016 -0600 Feature for editing, creating, uploading and deleting files
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if strings.ToLower(ext) == extension {
return true
}
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}
return false
}
// MarkdownRenderer is a extended version of underlying Markdown render object.
type MarkdownRenderer struct {
blackfriday.Renderer
urlPrefix string
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}
var validLinksPattern = regexp.MustCompile(`^[a-z][\w-]+://|^mailto:`)
// isLink reports whether link fits valid format.
func isLink(link []byte) bool {
return validLinksPattern.Match(link)
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}
// Link defines how formal links should be processed to produce corresponding HTML elements.
func (r *MarkdownRenderer) Link(out *bytes.Buffer, link []byte, title []byte, content []byte) {
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if len(link) > 0 && !isLink(link) {
if link[0] != '#' {
link = []byte(path.Join(r.urlPrefix, string(link)))
}
}
r.Renderer.Link(out, link, title, content)
}
// AutoLink defines how auto-detected links should be processed to produce corresponding HTML elements.
// Reference for kind: https://github.com/russross/blackfriday/blob/master/markdown.go#L69-L76
func (r *MarkdownRenderer) AutoLink(out *bytes.Buffer, link []byte, kind int) {
if kind != blackfriday.LINK_TYPE_NORMAL {
r.Renderer.AutoLink(out, link, kind)
return
}
// Since this method could only possibly serve one link at a time,
// we do not need to find all.
if bytes.HasPrefix(link, []byte(setting.AppURL)) {
m := CommitPattern.Find(link)
if m != nil {
m = bytes.TrimSpace(m)
i := strings.Index(string(m), "commit/")
j := strings.Index(string(m), "#")
if j == -1 {
j = len(m)
}
out.WriteString(fmt.Sprintf(` <code><a href="%s">%s</a></code>`, m, tool.ShortSHA1(string(m[i+7:j]))))
return
}
m = IssueFullPattern.Find(link)
if m != nil {
m = bytes.TrimSpace(m)
i := strings.Index(string(m), "issues/")
j := strings.Index(string(m), "#")
if j == -1 {
j = len(m)
}
index := string(m[i+7 : j])
fullRepoURL := setting.AppURL + strings.TrimPrefix(r.urlPrefix, "/")
var link string
if strings.HasPrefix(string(m), fullRepoURL) {
// Use a short issue reference if the URL refers to this repository
link = fmt.Sprintf(`<a href="%s">#%s</a>`, m, index)
} else {
// Use a cross-repository issue reference if the URL refers to a different repository
repo := string(m[len(setting.AppURL) : i-1])
link = fmt.Sprintf(`<a href="%s">%s#%s</a>`, m, repo, index)
}
out.WriteString(link)
return
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}
}
r.Renderer.AutoLink(out, link, kind)
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}
// ListItem defines how list items should be processed to produce corresponding HTML elements.
func (options *MarkdownRenderer) ListItem(out *bytes.Buffer, text []byte, flags int) {
// Detect procedures to draw checkboxes.
switch {
case bytes.HasPrefix(text, []byte("[ ] ")):
text = append([]byte(`<input type="checkbox" disabled="" />`), text[3:]...)
case bytes.HasPrefix(text, []byte("[x] ")):
text = append([]byte(`<input type="checkbox" disabled="" checked="" />`), text[3:]...)
}
options.Renderer.ListItem(out, text, flags)
}
// RawMarkdown renders content in Markdown syntax to HTML without handling special links.
func RawMarkdown(body []byte, urlPrefix string) []byte {
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htmlFlags := 0
htmlFlags |= blackfriday.HTML_SKIP_STYLE
htmlFlags |= blackfriday.HTML_OMIT_CONTENTS
if setting.Smartypants.Enabled {
htmlFlags |= blackfriday.HTML_USE_SMARTYPANTS
if setting.Smartypants.Fractions {
htmlFlags |= blackfriday.HTML_SMARTYPANTS_FRACTIONS
}
if setting.Smartypants.Dashes {
htmlFlags |= blackfriday.HTML_SMARTYPANTS_DASHES
}
if setting.Smartypants.LatexDashes {
htmlFlags |= blackfriday.HTML_SMARTYPANTS_LATEX_DASHES
}
if setting.Smartypants.AngledQuotes {
htmlFlags |= blackfriday.HTML_SMARTYPANTS_ANGLED_QUOTES
}
}
renderer := &MarkdownRenderer{
Renderer: blackfriday.HtmlRenderer(htmlFlags, "", ""),
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urlPrefix: urlPrefix,
}
// set up the parser
extensions := 0
extensions |= blackfriday.EXTENSION_NO_INTRA_EMPHASIS
extensions |= blackfriday.EXTENSION_TABLES
extensions |= blackfriday.EXTENSION_FENCED_CODE
extensions |= blackfriday.EXTENSION_AUTOLINK
extensions |= blackfriday.EXTENSION_STRIKETHROUGH
extensions |= blackfriday.EXTENSION_SPACE_HEADERS
extensions |= blackfriday.EXTENSION_NO_EMPTY_LINE_BEFORE_BLOCK
if setting.Markdown.EnableHardLineBreak {
extensions |= blackfriday.EXTENSION_HARD_LINE_BREAK
}
body = blackfriday.Markdown(body, renderer, extensions)
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return body
}
// Markdown takes a string or []byte and renders to HTML in Markdown syntax with special links.
func Markdown(input interface{}, urlPrefix string, metas map[string]string) []byte {
return Render(MARKDOWN, input, urlPrefix, metas)
}