mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-21 20:46:30 -05:00
545 lines
13 KiB
Go
545 lines
13 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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"fmt"
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"html/template"
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"runtime/debug"
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"strings"
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"sync"
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"unicode/utf8"
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"github.com/gohugoio/hugo/identity"
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"github.com/gohugoio/hugo/markup/converter/hooks"
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"github.com/gohugoio/hugo/markup/converter"
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"github.com/gohugoio/hugo/lazy"
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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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var pageContentOutputDependenciesID = identity.KeyValueIdentity{Key: "pageOutput", Value: "dependencies"}
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func newPageContentOutput(p *pageState, po *pageOutput) (*pageContentOutput, error) {
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parent := p.init
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var dependencyTracker identity.Manager
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if p.s.running() {
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dependencyTracker = identity.NewManager(pageContentOutputDependenciesID)
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}
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cp := &pageContentOutput{
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dependencyTracker: dependencyTracker,
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p: p,
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f: po.f,
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}
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initContent := func() (err error) {
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p.s.h.IncrContentRender()
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if p.cmap == nil {
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// Nothing to do.
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return nil
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}
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defer func() {
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// See https://github.com/gohugoio/hugo/issues/6210
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if r := recover(); r != nil {
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err = fmt.Errorf("%s", r)
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p.s.Log.ERROR.Printf("[BUG] Got panic:\n%s\n%s", r, string(debug.Stack()))
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}
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}()
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if err := po.initRenderHooks(); err != nil {
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return err
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}
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var hasShortcodeVariants bool
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f := po.f
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cp.contentPlaceholders, hasShortcodeVariants, err = p.shortcodeState.renderShortcodesForPage(p, f)
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if err != nil {
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return err
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}
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enableReuse := !(hasShortcodeVariants || cp.renderHooksHaveVariants)
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if enableReuse {
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// Reuse this for the other output formats.
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// We may improve on this, but we really want to avoid re-rendering the content
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// to all output formats.
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// The current rule is that if you need output format-aware shortcodes or
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// content rendering hooks, create a output format-specific template, e.g.
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// myshortcode.amp.html.
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cp.enableReuse()
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}
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cp.workContent = p.contentToRender(cp.contentPlaceholders)
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isHTML := cp.p.m.markup == "html"
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if p.renderable {
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if !isHTML {
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r, err := cp.renderContent(cp.workContent, true)
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if err != nil {
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return err
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}
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cp.workContent = r.Bytes()
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if tocProvider, ok := r.(converter.TableOfContentsProvider); ok {
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cfg := p.s.ContentSpec.Converters.GetMarkupConfig()
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cp.tableOfContents = template.HTML(
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tocProvider.TableOfContents().ToHTML(
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cfg.TableOfContents.StartLevel,
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cfg.TableOfContents.EndLevel,
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cfg.TableOfContents.Ordered,
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),
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)
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} else {
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tmpContent, tmpTableOfContents := helpers.ExtractTOC(cp.workContent)
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cp.tableOfContents = helpers.BytesToHTML(tmpTableOfContents)
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cp.workContent = tmpContent
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}
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}
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if cp.placeholdersEnabled {
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// ToC was accessed via .Page.TableOfContents in the shortcode,
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// at a time when the ToC wasn't ready.
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cp.contentPlaceholders[tocShortcodePlaceholder] = string(cp.tableOfContents)
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}
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if p.cmap.hasNonMarkdownShortcode || cp.placeholdersEnabled {
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// There are one or more replacement tokens to be replaced.
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cp.workContent, err = replaceShortcodeTokens(cp.workContent, cp.contentPlaceholders)
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if err != nil {
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return err
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}
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}
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if cp.p.source.hasSummaryDivider {
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if isHTML {
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src := p.source.parsed.Input()
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// Use the summary sections as they are provided by the user.
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if p.source.posSummaryEnd != -1 {
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cp.summary = helpers.BytesToHTML(src[p.source.posMainContent:p.source.posSummaryEnd])
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}
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if cp.p.source.posBodyStart != -1 {
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cp.workContent = src[cp.p.source.posBodyStart:]
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}
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} else {
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summary, content, err := splitUserDefinedSummaryAndContent(cp.p.m.markup, cp.workContent)
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if err != nil {
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cp.p.s.Log.ERROR.Printf("Failed to set user defined summary for page %q: %s", cp.p.pathOrTitle(), err)
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} else {
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cp.workContent = content
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cp.summary = helpers.BytesToHTML(summary)
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}
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}
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} else if cp.p.m.summary != "" {
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b, err := cp.renderContent([]byte(cp.p.m.summary), false)
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if err != nil {
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return err
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}
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html := cp.p.s.ContentSpec.TrimShortHTML(b.Bytes())
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cp.summary = helpers.BytesToHTML(html)
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}
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cp.content = helpers.BytesToHTML(cp.workContent)
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}
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if !p.renderable {
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err := cp.addSelfTemplate()
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return err
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}
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return nil
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}
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// Recursive loops can only happen in content files with template code (shortcodes etc.)
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// Avoid creating new goroutines if we don't have to.
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needTimeout := !p.renderable || p.shortcodeState.hasShortcodes()
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needTimeout = needTimeout || cp.renderHooks != nil
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if needTimeout {
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cp.initMain = parent.BranchWithTimeout(p.s.siteCfg.timeout, func(ctx context.Context) (interface{}, error) {
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return nil, initContent()
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})
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} else {
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cp.initMain = parent.Branch(func() (interface{}, error) {
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return nil, initContent()
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})
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}
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cp.initPlain = cp.initMain.Branch(func() (interface{}, error) {
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cp.plain = helpers.StripHTML(string(cp.content))
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cp.plainWords = strings.Fields(cp.plain)
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cp.setWordCounts(p.m.isCJKLanguage)
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if err := cp.setAutoSummary(); err != nil {
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return err, nil
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}
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return nil, nil
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})
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return cp, nil
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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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f output.Format
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// If we can reuse this for other output formats.
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reuse bool
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reuseInit sync.Once
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p *pageState
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// Lazy load dependencies
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initMain *lazy.Init
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initPlain *lazy.Init
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placeholdersEnabled bool
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placeholdersEnabledInit sync.Once
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// May be nil.
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renderHooks *hooks.Render
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// Set if there are more than one output format variant
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renderHooksHaveVariants bool // TODO(bep) reimplement this in another way, consolidate with shortcodes
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// Content state
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workContent []byte
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dependencyTracker identity.Manager // Set in server mode.
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// Temporary storage of placeholders mapped to their content.
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// These are shortcodes etc. Some of these will need to be replaced
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// after any markup is rendered, so they share a common prefix.
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contentPlaceholders map[string]string
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// Content sections
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content template.HTML
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summary template.HTML
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tableOfContents template.HTML
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truncated bool
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plainWords []string
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plain string
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fuzzyWordCount int
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wordCount int
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readingTime int
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}
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func (p *pageContentOutput) trackDependency(id identity.Provider) {
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if p.dependencyTracker != nil {
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p.dependencyTracker.Add(id)
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}
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}
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func (p *pageContentOutput) Reset() {
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if p.dependencyTracker != nil {
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p.dependencyTracker.Reset()
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}
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p.initMain.Reset()
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p.initPlain.Reset()
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}
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func (p *pageContentOutput) Content() (interface{}, error) {
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if p.p.s.initInit(p.initMain, p.p) {
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return p.content, nil
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}
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return nil, nil
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}
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func (p *pageContentOutput) FuzzyWordCount() int {
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p.p.s.initInit(p.initPlain, p.p)
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return p.fuzzyWordCount
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}
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func (p *pageContentOutput) Len() int {
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p.p.s.initInit(p.initMain, p.p)
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return len(p.content)
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}
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func (p *pageContentOutput) Plain() string {
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p.p.s.initInit(p.initPlain, p.p)
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return p.plain
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}
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func (p *pageContentOutput) PlainWords() []string {
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p.p.s.initInit(p.initPlain, p.p)
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return p.plainWords
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}
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func (p *pageContentOutput) ReadingTime() int {
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p.p.s.initInit(p.initPlain, p.p)
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return p.readingTime
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}
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func (p *pageContentOutput) Summary() template.HTML {
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p.p.s.initInit(p.initMain, p.p)
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if !p.p.source.hasSummaryDivider {
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p.p.s.initInit(p.initPlain, p.p)
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}
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return p.summary
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}
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func (p *pageContentOutput) TableOfContents() template.HTML {
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p.p.s.initInit(p.initMain, p.p)
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return p.tableOfContents
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}
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func (p *pageContentOutput) Truncated() bool {
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if p.p.truncated {
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return true
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}
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p.p.s.initInit(p.initPlain, p.p)
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return p.truncated
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}
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func (p *pageContentOutput) WordCount() int {
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p.p.s.initInit(p.initPlain, p.p)
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return p.wordCount
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}
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func (p *pageContentOutput) setAutoSummary() error {
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if p.p.source.hasSummaryDivider || p.p.m.summary != "" {
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return nil
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}
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var summary string
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var truncated bool
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if p.p.m.isCJKLanguage {
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summary, truncated = p.p.s.ContentSpec.TruncateWordsByRune(p.plainWords)
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} else {
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summary, truncated = p.p.s.ContentSpec.TruncateWordsToWholeSentence(p.plain)
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}
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p.summary = template.HTML(summary)
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p.truncated = truncated
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return nil
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}
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func (cp *pageContentOutput) renderContent(content []byte, renderTOC bool) (converter.Result, error) {
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c := cp.p.getContentConverter()
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return cp.renderContentWithConverter(c, content, renderTOC)
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}
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func (cp *pageContentOutput) renderContentWithConverter(c converter.Converter, content []byte, renderTOC bool) (converter.Result, error) {
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r, err := c.Convert(
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converter.RenderContext{
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Src: content,
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RenderTOC: renderTOC,
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RenderHooks: cp.renderHooks,
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})
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if err == nil {
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if ids, ok := r.(identity.IdentitiesProvider); ok {
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for _, v := range ids.GetIdentities() {
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cp.trackDependency(v)
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}
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}
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}
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return r, err
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}
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func (p *pageContentOutput) setWordCounts(isCJKLanguage bool) {
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if isCJKLanguage {
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p.wordCount = 0
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for _, word := range p.plainWords {
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runeCount := utf8.RuneCountInString(word)
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if len(word) == runeCount {
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p.wordCount++
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} else {
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p.wordCount += runeCount
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}
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}
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} else {
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p.wordCount = helpers.TotalWords(p.plain)
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}
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// TODO(bep) is set in a test. Fix that.
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if p.fuzzyWordCount == 0 {
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p.fuzzyWordCount = (p.wordCount + 100) / 100 * 100
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}
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if isCJKLanguage {
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p.readingTime = (p.wordCount + 500) / 501
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} else {
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p.readingTime = (p.wordCount + 212) / 213
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}
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}
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func (p *pageContentOutput) addSelfTemplate() error {
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self := p.p.selfLayoutForOutput(p.f)
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err := p.p.s.Tmpl().(tpl.TemplateManager).AddLateTemplate(self, string(p.workContent))
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if err != nil {
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return err
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}
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return nil
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}
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// A callback to signal that we have inserted a placeholder into the rendered
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// content. This avoids doing extra replacement work.
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func (p *pageContentOutput) enablePlaceholders() {
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p.placeholdersEnabledInit.Do(func() {
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p.placeholdersEnabled = true
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})
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}
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func (p *pageContentOutput) enableReuse() {
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p.reuseInit.Do(func() {
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p.reuse = true
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})
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}
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// these will be shifted out when rendering a given output format.
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type pagePerOutputProviders interface {
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targetPather
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page.PaginatorProvider
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resource.ResourceLinksProvider
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}
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type targetPather interface {
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targetPaths() page.TargetPaths
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}
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type targetPathsHolder struct {
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paths page.TargetPaths
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page.OutputFormat
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}
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func (t targetPathsHolder) targetPaths() page.TargetPaths {
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return t.paths
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}
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func executeToString(h tpl.TemplateHandler, templ tpl.Template, data interface{}) (string, error) {
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b := bp.GetBuffer()
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defer bp.PutBuffer(b)
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if err := h.Execute(templ, b, data); err != nil {
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return "", err
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}
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return b.String(), nil
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}
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func splitUserDefinedSummaryAndContent(markup string, c []byte) (summary []byte, content []byte, err error) {
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defer func() {
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if r := recover(); r != nil {
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err = fmt.Errorf("summary split failed: %s", r)
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}
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}()
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startDivider := bytes.Index(c, internalSummaryDividerBaseBytes)
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if startDivider == -1 {
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return
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}
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startTag := "p"
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switch markup {
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case "asciidoc":
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startTag = "div"
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}
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// Walk back and forward to the surrounding tags.
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start := bytes.LastIndex(c[:startDivider], []byte("<"+startTag))
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end := bytes.Index(c[startDivider:], []byte("</"+startTag))
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if start == -1 {
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start = startDivider
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} else {
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start = startDivider - (startDivider - start)
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}
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if end == -1 {
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end = startDivider + len(internalSummaryDividerBase)
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} else {
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end = startDivider + end + len(startTag) + 3
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}
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var addDiv bool
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switch markup {
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case "rst":
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addDiv = true
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}
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withoutDivider := append(c[:start], bytes.Trim(c[end:], "\n")...)
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if len(withoutDivider) > 0 {
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summary = bytes.TrimSpace(withoutDivider[:start])
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}
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if addDiv {
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// For the rst
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summary = append(append([]byte(nil), summary...), []byte("</div>")...)
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}
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if err != nil {
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return
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}
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content = bytes.TrimSpace(withoutDivider)
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return
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}
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