hugo/common/hugio/readers.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

54 lines
1.7 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 hugio
import (
"io"
"strings"
)
// ReadSeeker wraps io.Reader and io.Seeker.
type ReadSeeker interface {
io.Reader
io.Seeker
}
// ReadSeekCloser is implemented by afero.File. We use this as the common type for
// content in Resource objects, even for strings.
type ReadSeekCloser interface {
ReadSeeker
io.Closer
}
// ReadSeekerNoOpCloser implements ReadSeekCloser by doing nothing in Close.
// TODO(bep) rename this and simila to ReadSeekerNopCloser, naming used in stdlib, which kind of makes sense.
type ReadSeekerNoOpCloser struct {
ReadSeeker
}
// Close does nothing.
func (r ReadSeekerNoOpCloser) Close() error {
return nil
}
// NewReadSeekerNoOpCloser creates a new ReadSeekerNoOpCloser with the given ReadSeeker.
func NewReadSeekerNoOpCloser(r ReadSeeker) ReadSeekerNoOpCloser {
return ReadSeekerNoOpCloser{r}
}
// NewReadSeekerNoOpCloserFromString uses strings.NewReader to create a new ReadSeekerNoOpCloser
// from the given string.
func NewReadSeekerNoOpCloserFromString(content string) ReadSeekerNoOpCloser {
return ReadSeekerNoOpCloser{strings.NewReader(content)}
}