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// Copyright 2017-present 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 output
import (
"fmt"
"path"
"strings"
)
// LayoutIdentifier is used to pick the correct layout for a piece of content.
type LayoutIdentifier interface {
PageType() string
PageSection() string // TODO(bep) name
PageKind() string
PageLayout() string
}
// Layout calculates the layout template to use to render a given output type.
// TODO(bep) output improve names
type LayoutHandler struct {
}
// TODO(bep) output theme layouts
var (
layoutsHome = "index.html _default/list.html"
layoutsSection = "section/SECTION.html SECTION/list.html _default/section.html _default/list.html indexes/SECTION.html _default/indexes.html"
layoutTaxonomy = "taxonomy/SECTION.html indexes/SECTION.html _default/taxonomy.html _default/list.html"
layoutTaxonomyTerm = "taxonomy/SECTION.terms.html _default/terms.html indexes/indexes.html"
)
func (l *LayoutHandler) For(id LayoutIdentifier, layoutOverride string, tp Type) []string {
var layouts []string
layout := id.PageLayout()
if layoutOverride != "" {
layout = layoutOverride
}
switch id.PageKind() {
// TODO(bep) move the Kind constants some common place.
case "home":
layouts = strings.Fields(layoutsHome)
case "section":
layouts = strings.Fields(strings.Replace(layoutsSection, "SECTION", id.PageSection(), -1))
case "taxonomy":
layouts = strings.Fields(strings.Replace(layoutTaxonomy, "SECTION", id.PageSection(), -1))
case "taxonomyTerm":
layouts = strings.Fields(strings.Replace(layoutTaxonomyTerm, "SECTION", id.PageSection(), -1))
case "page":
layouts = regularPageLayouts(id.PageType(), layout)
}
for _, l := range layouts {
layouts = append(layouts, "theme/"+l)
}
return layouts
}
func regularPageLayouts(types string, layout string) (layouts []string) {
if layout == "" {
layout = "single"
}
if types != "" {
t := strings.Split(types, "/")
// Add type/layout.html
for i := range t {
search := t[:len(t)-i]
layouts = append(layouts, fmt.Sprintf("%s/%s.html", strings.ToLower(path.Join(search...)), layout))
}
}
// Add _default/layout.html
layouts = append(layouts, fmt.Sprintf("_default/%s.html", layout))
return
}
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