hugo/hugolib/shortcode_page.go
Bjørn Erik Pedersen 597e418cb0
Make Page an interface
The main motivation of this commit is to add a `page.Page` interface to replace the very file-oriented `hugolib.Page` struct.
This is all a preparation step for issue  #5074, "pages from other data sources".

But this also fixes a set of annoying limitations, especially related to custom output formats, and shortcodes.

Most notable changes:

* The inner content of shortcodes using the `{{%` as the outer-most delimiter will now be sent to the content renderer, e.g. Blackfriday.
  This means that any markdown will partake in the global ToC and footnote context etc.
* The Custom Output formats are now "fully virtualized". This removes many of the current limitations.
* The taxonomy list type now has a reference to the `Page` object.
  This improves the taxonomy template `.Title` situation and make common template constructs much simpler.

See #5074
Fixes #5763
Fixes #5758
Fixes #5090
Fixes #5204
Fixes #4695
Fixes #5607
Fixes #5707
Fixes #5719
Fixes #3113
Fixes #5706
Fixes #5767
Fixes #5723
Fixes #5769
Fixes #5770
Fixes #5771
Fixes #5759
Fixes #5776
Fixes #5777
Fixes #5778
2019-03-23 18:51:22 +01:00

56 lines
1.6 KiB
Go

// Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package hugolib
import (
"html/template"
"github.com/gohugoio/hugo/resources/page"
)
var tocShortcodePlaceholder = createShortcodePlaceholder("TOC", 0)
// This is sent to the shortcodes. They cannot access the content
// they're a part of. It would cause an infinite regress.
//
// Go doesn't support virtual methods, so this careful dance is currently (I think)
// the best we can do.
type pageForShortcode struct {
page.PageWithoutContent
page.ContentProvider
// We need to replace it after we have rendered it, so provide a
// temporary placeholder.
toc template.HTML
p *pageState
}
func newPageForShortcode(p *pageState) page.Page {
return &pageForShortcode{
PageWithoutContent: p,
ContentProvider: page.NopPage,
toc: template.HTML(tocShortcodePlaceholder),
p: p,
}
}
func (p *pageForShortcode) page() page.Page {
return p.PageWithoutContent.(page.Page)
}
func (p *pageForShortcode) TableOfContents() template.HTML {
p.p.enablePlaceholders()
return p.toc
}