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tpl: Rework to handle both text and HTML templates

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Before this commit, Hugo used `html/template` for all Go templates.

While this is a fine choice for HTML and maybe also RSS feeds, it is painful for plain text formats such as CSV, JSON etc.

This commit fixes that by using the `IsPlainText` attribute on the output format to decide what to use.

A couple of notes:

* The above requires a nonambiguous template name to type mapping. I.e. `/layouts/_default/list.json` will only work if there is only one JSON output format, `/layouts/_default/list.mytype.json` will always work.
* Ambiguous types will fall back to HTML.
* Partials inherits the text vs HTML identificator of the container template. This also means that plain text templates can only include plain text partials.
* Shortcode templates are, by definition, currently HTML templates only.

Fixes #3221
This commit is contained in:
Bjørn Erik Pedersen 2017-03-27 20:43:49 +02:00
parent 73c1c7b69d
commit 5c5efa03d2
31 changed files with 1208 additions and 840 deletions
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16
hugolib/shortcode.go
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@ -177,7 +177,7 @@ var isInnerShortcodeCache = struct {
// to avoid potential costly look-aheads for closing tags we look inside the template itself
// we could change the syntax to self-closing tags, but that would make users cry
// the value found is cached
func isInnerShortcode(t *template.Template) (bool, error) {
func isInnerShortcode(t tpl.TemplateExecutor) (bool, error) {
isInnerShortcodeCache.RLock()
m, ok := isInnerShortcodeCache.m[t.Name()]
isInnerShortcodeCache.RUnlock()
@ -188,10 +188,7 @@ func isInnerShortcode(t *template.Template) (bool, error) {
isInnerShortcodeCache.Lock()
defer isInnerShortcodeCache.Unlock()
if t.Tree == nil {
return false, errors.New("Template failed to compile")
}
match, _ := regexp.MatchString("{{.*?\\.Inner.*?}}", t.Tree.Root.String())
match, _ := regexp.MatchString("{{.*?\\.Inner.*?}}", t.Tree())
isInnerShortcodeCache.m[t.Name()] = match
return match, nil
@ -398,8 +395,6 @@ Loop:
case tScName:
sc.name = currItem.val
tmpl := getShortcodeTemplate(sc.name, p.s.Tmpl)
{
}
if tmpl == nil {
return sc, fmt.Errorf("Unable to locate template for shortcode %q in page %q", sc.name, p.Path())
}
@ -570,7 +565,10 @@ func replaceShortcodeTokens(source []byte, prefix string, replacements map[strin
return source, nil
}
func getShortcodeTemplate(name string, t tpl.Template) *template.Template {
func getShortcodeTemplate(name string, t tpl.TemplateHandler) *tpl.TemplateAdapter {
isInnerShortcodeCache.RLock()
defer isInnerShortcodeCache.RUnlock()
if x := t.Lookup("shortcodes/" + name + ".html"); x != nil {
return x
}
@ -580,7 +578,7 @@ func getShortcodeTemplate(name string, t tpl.Template) *template.Template {
return t.Lookup("_internal/shortcodes/" + name + ".html")
}
func renderShortcodeWithPage(tmpl *template.Template, data *ShortcodeWithPage) string {
func renderShortcodeWithPage(tmpl tpl.Template, data *ShortcodeWithPage) string {
buffer := bp.GetBuffer()
defer bp.PutBuffer(buffer)