hugo/common/types/types.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

80 lines
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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 types contains types shared between packages in Hugo.
package types
import (
"fmt"
"reflect"
"github.com/spf13/cast"
)
// KeyValueStr is a string tuple.
type KeyValueStr struct {
Key string
Value string
}
// KeyValues holds an key and a slice of values.
type KeyValues struct {
Key interface{}
Values []interface{}
}
// KeyString returns the key as a string, an empty string if conversion fails.
func (k KeyValues) KeyString() string {
return cast.ToString(k.Key)
}
func (k KeyValues) String() string {
return fmt.Sprintf("%v: %v", k.Key, k.Values)
}
// NewKeyValuesStrings takes a given key and slice of values and returns a new
// KeyValues struct.
func NewKeyValuesStrings(key string, values ...string) KeyValues {
iv := make([]interface{}, len(values))
for i := 0; i < len(values); i++ {
iv[i] = values[i]
}
return KeyValues{Key: key, Values: iv}
}
// Zeroer, as implemented by time.Time, will be used by the truth template
// funcs in Hugo (if, with, not, and, or).
type Zeroer interface {
IsZero() bool
}
// IsNil reports whether v is nil.
func IsNil(v interface{}) bool {
if v == nil {
return true
}
value := reflect.ValueOf(v)
switch value.Kind() {
case reflect.Chan, reflect.Func, reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
return value.IsNil()
}
return false
}
// DevMarker is a marker interface for types that should only be used during
// development.
type DevMarker interface {
DevOnly()
}