mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-07 20:30:36 -05:00
705 lines
18 KiB
Go
705 lines
18 KiB
Go
// Copyright 2019 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package hugolib
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"html/template"
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"strings"
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"sync"
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"github.com/gohugoio/hugo/common/text"
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"github.com/gohugoio/hugo/common/types/hstring"
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"github.com/gohugoio/hugo/identity"
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"github.com/gohugoio/hugo/parser/pageparser"
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"github.com/mitchellh/mapstructure"
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"github.com/spf13/cast"
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"github.com/gohugoio/hugo/markup/converter/hooks"
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"github.com/gohugoio/hugo/markup/goldmark/hugocontext"
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"github.com/gohugoio/hugo/markup/highlight/chromalexers"
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"github.com/gohugoio/hugo/markup/tableofcontents"
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"github.com/gohugoio/hugo/markup/converter"
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bp "github.com/gohugoio/hugo/bufferpool"
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"github.com/gohugoio/hugo/tpl"
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"github.com/gohugoio/hugo/helpers"
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"github.com/gohugoio/hugo/output"
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"github.com/gohugoio/hugo/resources/page"
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"github.com/gohugoio/hugo/resources/resource"
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)
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var (
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nopTargetPath = targetPathsHolder{}
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nopPagePerOutput = struct {
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resource.ResourceLinksProvider
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page.ContentProvider
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page.PageRenderProvider
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page.PaginatorProvider
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page.TableOfContentsProvider
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page.AlternativeOutputFormatsProvider
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targetPather
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}{
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page.NopPage,
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page.NopPage,
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page.NopPage,
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page.NopPage,
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page.NopPage,
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page.NopPage,
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nopTargetPath,
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}
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)
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func newPageContentOutput(po *pageOutput) (*pageContentOutput, error) {
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cp := &pageContentOutput{
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po: po,
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renderHooks: &renderHooks{},
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otherOutputs: make(map[uint64]*pageContentOutput),
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}
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return cp, nil
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}
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type renderHooks struct {
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getRenderer hooks.GetRendererFunc
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init sync.Once
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}
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// pageContentOutput represents the Page content for a given output format.
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type pageContentOutput struct {
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po *pageOutput
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// Other pages involved in rendering of this page,
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// typically included with .RenderShortcodes.
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otherOutputs map[uint64]*pageContentOutput
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contentRenderedVersion uint32 // Incremented on reset.
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contentRendered bool // Set on content render.
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// Renders Markdown hooks.
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renderHooks *renderHooks
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}
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func (pco *pageContentOutput) trackDependency(idp identity.IdentityProvider) {
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pco.po.p.dependencyManagerOutput.AddIdentity(idp.GetIdentity())
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}
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func (pco *pageContentOutput) Reset() {
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if pco == nil {
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return
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}
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pco.contentRenderedVersion++
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pco.contentRendered = false
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pco.renderHooks = &renderHooks{}
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}
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func (pco *pageContentOutput) Fragments(ctx context.Context) *tableofcontents.Fragments {
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return pco.po.p.m.content.mustContentToC(ctx, pco).tableOfContents
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}
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func (pco *pageContentOutput) RenderShortcodes(ctx context.Context) (template.HTML, error) {
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content := pco.po.p.m.content
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source, err := content.pi.contentSource(content)
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if err != nil {
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return "", err
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}
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ct, err := content.contentToC(ctx, pco)
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if err != nil {
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return "", err
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}
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var insertPlaceholders bool
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var hasVariants bool
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cb := setGetContentCallbackInContext.Get(ctx)
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if cb != nil {
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insertPlaceholders = true
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}
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c := make([]byte, 0, len(source)+(len(source)/10))
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for _, it := range content.pi.itemsStep2 {
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switch v := it.(type) {
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case pageparser.Item:
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c = append(c, source[v.Pos():v.Pos()+len(v.Val(source))]...)
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case pageContentReplacement:
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// Ignore.
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case *shortcode:
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if !insertPlaceholders || !v.insertPlaceholder() {
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// Insert the rendered shortcode.
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renderedShortcode, found := ct.contentPlaceholders[v.placeholder]
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if !found {
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// This should never happen.
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panic(fmt.Sprintf("rendered shortcode %q not found", v.placeholder))
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}
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b, more, err := renderedShortcode.renderShortcode(ctx)
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if err != nil {
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return "", fmt.Errorf("failed to render shortcode: %w", err)
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}
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hasVariants = hasVariants || more
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c = append(c, []byte(b)...)
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} else {
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// Insert the placeholder so we can insert the content after
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// markdown processing.
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c = append(c, []byte(v.placeholder)...)
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}
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default:
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panic(fmt.Sprintf("unknown item type %T", it))
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}
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}
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if hasVariants {
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pco.po.p.pageOutputTemplateVariationsState.Add(1)
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}
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if cb != nil {
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cb(pco, ct)
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}
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if tpl.Context.IsInGoldmark.Get(ctx) {
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// This content will be parsed and rendered by Goldmark.
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// Wrap it in a special Hugo markup to assign the correct Page from
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// the stack.
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return template.HTML(hugocontext.Wrap(c, pco.po.p.pid)), nil
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}
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return helpers.BytesToHTML(c), nil
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}
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func (pco *pageContentOutput) Content(ctx context.Context) (any, error) {
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r, err := pco.po.p.m.content.contentRendered(ctx, pco)
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return r.content, err
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}
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func (pco *pageContentOutput) TableOfContents(ctx context.Context) template.HTML {
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return pco.po.p.m.content.mustContentToC(ctx, pco).tableOfContentsHTML
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}
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func (p *pageContentOutput) Len(ctx context.Context) int {
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return len(p.mustContentRendered(ctx).content)
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}
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func (pco *pageContentOutput) mustContentRendered(ctx context.Context) contentSummary {
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r, err := pco.po.p.m.content.contentRendered(ctx, pco)
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if err != nil {
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pco.fail(err)
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}
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return r
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}
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func (pco *pageContentOutput) mustContentPlain(ctx context.Context) contentPlainPlainWords {
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r, err := pco.po.p.m.content.contentPlain(ctx, pco)
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if err != nil {
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pco.fail(err)
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}
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return r
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}
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func (pco *pageContentOutput) fail(err error) {
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pco.po.p.s.h.FatalError(pco.po.p.wrapError(err))
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}
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func (pco *pageContentOutput) Plain(ctx context.Context) string {
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return pco.mustContentPlain(ctx).plain
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}
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func (pco *pageContentOutput) PlainWords(ctx context.Context) []string {
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return pco.mustContentPlain(ctx).plainWords
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}
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func (pco *pageContentOutput) ReadingTime(ctx context.Context) int {
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return pco.mustContentPlain(ctx).readingTime
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}
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func (pco *pageContentOutput) WordCount(ctx context.Context) int {
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return pco.mustContentPlain(ctx).wordCount
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}
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func (pco *pageContentOutput) FuzzyWordCount(ctx context.Context) int {
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return pco.mustContentPlain(ctx).fuzzyWordCount
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}
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func (pco *pageContentOutput) Summary(ctx context.Context) template.HTML {
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return pco.mustContentPlain(ctx).summary
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}
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func (pco *pageContentOutput) Truncated(ctx context.Context) bool {
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return pco.mustContentPlain(ctx).summaryTruncated
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}
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func (pco *pageContentOutput) RenderString(ctx context.Context, args ...any) (template.HTML, error) {
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if len(args) < 1 || len(args) > 2 {
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return "", errors.New("want 1 or 2 arguments")
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}
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var contentToRender string
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opts := defaultRenderStringOpts
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sidx := 1
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if len(args) == 1 {
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sidx = 0
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} else {
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m, ok := args[0].(map[string]any)
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if !ok {
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return "", errors.New("first argument must be a map")
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}
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if err := mapstructure.WeakDecode(m, &opts); err != nil {
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return "", fmt.Errorf("failed to decode options: %w", err)
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}
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}
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contentToRenderv := args[sidx]
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if _, ok := contentToRenderv.(hstring.RenderedString); ok {
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// This content is already rendered, this is potentially
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// a infinite recursion.
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return "", errors.New("text is already rendered, repeating it may cause infinite recursion")
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}
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var err error
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contentToRender, err = cast.ToStringE(contentToRenderv)
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if err != nil {
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return "", err
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}
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if err = pco.initRenderHooks(); err != nil {
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return "", err
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}
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conv := pco.po.p.getContentConverter()
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if opts.Markup != "" && opts.Markup != pco.po.p.m.pageConfig.Markup {
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var err error
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conv, err = pco.po.p.m.newContentConverter(pco.po.p, opts.Markup)
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if err != nil {
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return "", pco.po.p.wrapError(err)
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}
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}
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var rendered []byte
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parseInfo := &contentParseInfo{
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h: pco.po.p.s.h,
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pid: pco.po.p.pid,
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}
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if pageparser.HasShortcode(contentToRender) {
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contentToRenderb := []byte(contentToRender)
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// String contains a shortcode.
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parseInfo.itemsStep1, err = pageparser.ParseBytesMain(contentToRenderb, pageparser.Config{})
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if err != nil {
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return "", err
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}
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s := newShortcodeHandler(pco.po.p.pathOrTitle(), pco.po.p.s)
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if err := parseInfo.mapItemsAfterFrontMatter(contentToRenderb, s); err != nil {
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return "", err
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}
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placeholders, err := s.prepareShortcodesForPage(ctx, pco.po.p, pco.po.f, true)
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if err != nil {
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return "", err
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}
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contentToRender, hasVariants, err := parseInfo.contentToRender(ctx, contentToRenderb, placeholders)
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if err != nil {
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return "", err
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}
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if hasVariants {
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pco.po.p.pageOutputTemplateVariationsState.Add(1)
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}
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b, err := pco.renderContentWithConverter(ctx, conv, contentToRender, false)
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if err != nil {
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return "", pco.po.p.wrapError(err)
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}
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rendered = b.Bytes()
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if parseInfo.hasNonMarkdownShortcode {
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var hasShortcodeVariants bool
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tokenHandler := func(ctx context.Context, token string) ([]byte, error) {
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if token == tocShortcodePlaceholder {
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toc, err := pco.po.p.m.content.contentToC(ctx, pco)
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if err != nil {
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return nil, err
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}
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// The Page's TableOfContents was accessed in a shortcode.
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return []byte(toc.tableOfContentsHTML), nil
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}
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renderer, found := placeholders[token]
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if found {
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repl, more, err := renderer.renderShortcode(ctx)
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if err != nil {
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return nil, err
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}
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hasShortcodeVariants = hasShortcodeVariants || more
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return repl, nil
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}
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// This should not happen.
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return nil, fmt.Errorf("unknown shortcode token %q", token)
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}
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rendered, err = expandShortcodeTokens(ctx, rendered, tokenHandler)
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if err != nil {
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return "", err
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}
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if hasShortcodeVariants {
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pco.po.p.pageOutputTemplateVariationsState.Add(1)
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}
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}
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// We need a consolidated view in $page.HasShortcode
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pco.po.p.m.content.shortcodeState.transferNames(s)
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} else {
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c, err := pco.renderContentWithConverter(ctx, conv, []byte(contentToRender), false)
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if err != nil {
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return "", pco.po.p.wrapError(err)
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}
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rendered = c.Bytes()
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}
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if opts.Display == "inline" {
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markup := pco.po.p.m.pageConfig.Markup
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if opts.Markup != "" {
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markup = pco.po.p.s.ContentSpec.ResolveMarkup(opts.Markup)
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}
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rendered = pco.po.p.s.ContentSpec.TrimShortHTML(rendered, markup)
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}
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return template.HTML(string(rendered)), nil
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}
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func (pco *pageContentOutput) Render(ctx context.Context, layout ...string) (template.HTML, error) {
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if len(layout) == 0 {
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return "", errors.New("no layout given")
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}
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templ, found, err := pco.po.p.resolveTemplate(layout...)
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if err != nil {
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return "", pco.po.p.wrapError(err)
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}
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if !found {
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return "", nil
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}
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// Make sure to send the *pageState and not the *pageContentOutput to the template.
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res, err := executeToString(ctx, pco.po.p.s.Tmpl(), templ, pco.po.p)
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if err != nil {
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return "", pco.po.p.wrapError(fmt.Errorf("failed to execute template %s: %w", templ.Name(), err))
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}
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return template.HTML(res), nil
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}
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func (pco *pageContentOutput) initRenderHooks() error {
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if pco == nil {
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return nil
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}
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pco.renderHooks.init.Do(func() {
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if pco.po.p.pageOutputTemplateVariationsState.Load() == 0 {
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pco.po.p.pageOutputTemplateVariationsState.Store(1)
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}
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type cacheKey struct {
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tp hooks.RendererType
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id any
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f output.Format
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}
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renderCache := make(map[cacheKey]any)
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var renderCacheMu sync.Mutex
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resolvePosition := func(ctx any) text.Position {
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source := pco.po.p.m.content.mustSource()
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var offset int
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switch v := ctx.(type) {
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case hooks.CodeblockContext:
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offset = bytes.Index(source, []byte(v.Inner()))
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}
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pos := pco.po.p.posFromInput(source, offset)
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if pos.LineNumber > 0 {
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// Move up to the code fence delimiter.
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// This is in line with how we report on shortcodes.
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pos.LineNumber = pos.LineNumber - 1
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}
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return pos
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}
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pco.renderHooks.getRenderer = func(tp hooks.RendererType, id any) any {
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renderCacheMu.Lock()
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defer renderCacheMu.Unlock()
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key := cacheKey{tp: tp, id: id, f: pco.po.f}
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if r, ok := renderCache[key]; ok {
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return r
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}
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layoutDescriptor := pco.po.p.getLayoutDescriptor()
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layoutDescriptor.RenderingHook = true
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layoutDescriptor.LayoutOverride = false
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layoutDescriptor.Layout = ""
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switch tp {
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case hooks.LinkRendererType:
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layoutDescriptor.Kind = "render-link"
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case hooks.ImageRendererType:
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layoutDescriptor.Kind = "render-image"
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case hooks.HeadingRendererType:
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layoutDescriptor.Kind = "render-heading"
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case hooks.CodeBlockRendererType:
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layoutDescriptor.Kind = "render-codeblock"
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if id != nil {
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lang := id.(string)
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lexer := chromalexers.Get(lang)
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if lexer != nil {
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layoutDescriptor.KindVariants = strings.Join(lexer.Config().Aliases, ",")
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} else {
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layoutDescriptor.KindVariants = lang
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}
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}
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}
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getHookTemplate := func(f output.Format) (tpl.Template, bool) {
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templ, found, err := pco.po.p.s.Tmpl().LookupLayout(layoutDescriptor, f)
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if err != nil {
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panic(err)
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}
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if found {
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if isitp, ok := templ.(tpl.IsInternalTemplateProvider); ok && isitp.IsInternalTemplate() {
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renderHookConfig := pco.po.p.s.conf.Markup.Goldmark.RenderHooks
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switch templ.Name() {
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case "_default/_markup/render-link.html":
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if !renderHookConfig.Link.IsEnableDefault() {
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return nil, false
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}
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case "_default/_markup/render-image.html":
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if !renderHookConfig.Image.IsEnableDefault() {
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return nil, false
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}
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}
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}
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}
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return templ, found
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}
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templ, found1 := getHookTemplate(pco.po.f)
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if pco.po.p.reusePageOutputContent() {
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// Check if some of the other output formats would give a different template.
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for _, f := range pco.po.p.s.renderFormats {
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if f.Name == pco.po.f.Name {
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continue
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}
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templ2, found2 := getHookTemplate(f)
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if found2 {
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if !found1 {
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templ = templ2
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found1 = true
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break
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}
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if templ != templ2 {
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pco.po.p.pageOutputTemplateVariationsState.Add(1)
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break
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}
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}
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}
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}
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|
if !found1 {
|
|
if tp == hooks.CodeBlockRendererType {
|
|
// No user provided template for code blocks, so we use the native Go version -- which is also faster.
|
|
r := pco.po.p.s.ContentSpec.Converters.GetHighlighter()
|
|
renderCache[key] = r
|
|
return r
|
|
}
|
|
return nil
|
|
}
|
|
|
|
r := hookRendererTemplate{
|
|
templateHandler: pco.po.p.s.Tmpl(),
|
|
templ: templ,
|
|
resolvePosition: resolvePosition,
|
|
}
|
|
renderCache[key] = r
|
|
return r
|
|
}
|
|
})
|
|
|
|
return nil
|
|
}
|
|
|
|
func (pco *pageContentOutput) getContentConverter() (converter.Converter, error) {
|
|
if err := pco.initRenderHooks(); err != nil {
|
|
return nil, err
|
|
}
|
|
return pco.po.p.getContentConverter(), nil
|
|
}
|
|
|
|
func (cp *pageContentOutput) ParseAndRenderContent(ctx context.Context, content []byte, renderTOC bool) (converter.ResultRender, error) {
|
|
c, err := cp.getContentConverter()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return cp.renderContentWithConverter(ctx, c, content, renderTOC)
|
|
}
|
|
|
|
func (pco *pageContentOutput) ParseContent(ctx context.Context, content []byte) (converter.ResultParse, bool, error) {
|
|
c, err := pco.getContentConverter()
|
|
if err != nil {
|
|
return nil, false, err
|
|
}
|
|
p, ok := c.(converter.ParseRenderer)
|
|
if !ok {
|
|
return nil, ok, nil
|
|
}
|
|
rctx := converter.RenderContext{
|
|
Ctx: ctx,
|
|
Src: content,
|
|
RenderTOC: true,
|
|
GetRenderer: pco.renderHooks.getRenderer,
|
|
}
|
|
r, err := p.Parse(rctx)
|
|
return r, ok, err
|
|
}
|
|
|
|
func (pco *pageContentOutput) RenderContent(ctx context.Context, content []byte, doc any) (converter.ResultRender, bool, error) {
|
|
c, err := pco.getContentConverter()
|
|
if err != nil {
|
|
return nil, false, err
|
|
}
|
|
p, ok := c.(converter.ParseRenderer)
|
|
if !ok {
|
|
return nil, ok, nil
|
|
}
|
|
rctx := converter.RenderContext{
|
|
Ctx: ctx,
|
|
Src: content,
|
|
RenderTOC: true,
|
|
GetRenderer: pco.renderHooks.getRenderer,
|
|
}
|
|
r, err := p.Render(rctx, doc)
|
|
return r, ok, err
|
|
}
|
|
|
|
func (pco *pageContentOutput) renderContentWithConverter(ctx context.Context, c converter.Converter, content []byte, renderTOC bool) (converter.ResultRender, error) {
|
|
r, err := c.Convert(
|
|
converter.RenderContext{
|
|
Ctx: ctx,
|
|
Src: content,
|
|
RenderTOC: renderTOC,
|
|
GetRenderer: pco.renderHooks.getRenderer,
|
|
})
|
|
return r, err
|
|
}
|
|
|
|
// these will be shifted out when rendering a given output format.
|
|
type pagePerOutputProviders interface {
|
|
targetPather
|
|
page.PaginatorProvider
|
|
resource.ResourceLinksProvider
|
|
}
|
|
|
|
type targetPather interface {
|
|
targetPaths() page.TargetPaths
|
|
}
|
|
|
|
type targetPathsHolder struct {
|
|
paths page.TargetPaths
|
|
page.OutputFormat
|
|
}
|
|
|
|
func (t targetPathsHolder) targetPaths() page.TargetPaths {
|
|
return t.paths
|
|
}
|
|
|
|
func executeToString(ctx context.Context, h tpl.TemplateHandler, templ tpl.Template, data any) (string, error) {
|
|
b := bp.GetBuffer()
|
|
defer bp.PutBuffer(b)
|
|
if err := h.ExecuteWithContext(ctx, templ, b, data); err != nil {
|
|
return "", err
|
|
}
|
|
return b.String(), nil
|
|
}
|
|
|
|
func splitUserDefinedSummaryAndContent(markup string, c []byte) (summary []byte, content []byte, err error) {
|
|
defer func() {
|
|
if r := recover(); r != nil {
|
|
err = fmt.Errorf("summary split failed: %s", r)
|
|
}
|
|
}()
|
|
|
|
startDivider := bytes.Index(c, internalSummaryDividerBaseBytes)
|
|
|
|
if startDivider == -1 {
|
|
return
|
|
}
|
|
|
|
startTag := "p"
|
|
switch markup {
|
|
case "asciidocext":
|
|
startTag = "div"
|
|
}
|
|
|
|
// Walk back and forward to the surrounding tags.
|
|
start := bytes.LastIndex(c[:startDivider], []byte("<"+startTag))
|
|
end := bytes.Index(c[startDivider:], []byte("</"+startTag))
|
|
|
|
if start == -1 {
|
|
start = startDivider
|
|
} else {
|
|
start = startDivider - (startDivider - start)
|
|
}
|
|
|
|
if end == -1 {
|
|
end = startDivider + len(internalSummaryDividerBase)
|
|
} else {
|
|
end = startDivider + end + len(startTag) + 3
|
|
}
|
|
|
|
var addDiv bool
|
|
|
|
switch markup {
|
|
case "rst":
|
|
addDiv = true
|
|
}
|
|
|
|
withoutDivider := append(c[:start], bytes.Trim(c[end:], "\n")...)
|
|
|
|
if len(withoutDivider) > 0 {
|
|
summary = bytes.TrimSpace(withoutDivider[:start])
|
|
}
|
|
|
|
if addDiv {
|
|
// For the rst
|
|
summary = append(append([]byte(nil), summary...), []byte("</div>")...)
|
|
}
|
|
|
|
if err != nil {
|
|
return
|
|
}
|
|
|
|
content = bytes.TrimSpace(withoutDivider)
|
|
|
|
return
|
|
}
|