ref: 8a89b8582f0f681dc28961adb05ab0bf66da9543
dir: /hugolib/page.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 hugolib
import (
"bytes"
"fmt"
"html/template"
"os"
"path"
"path/filepath"
"sort"
"strings"
"github.com/gohugoio/hugo/markup/converter"
"github.com/gohugoio/hugo/common/maps"
"github.com/gohugoio/hugo/hugofs/files"
"github.com/bep/gitmap"
"github.com/gohugoio/hugo/helpers"
"github.com/gohugoio/hugo/common/herrors"
"github.com/gohugoio/hugo/parser/metadecoders"
"github.com/gohugoio/hugo/parser/pageparser"
"github.com/pkg/errors"
"github.com/gohugoio/hugo/output"
"github.com/gohugoio/hugo/media"
"github.com/gohugoio/hugo/source"
"github.com/gohugoio/hugo/common/collections"
"github.com/gohugoio/hugo/common/text"
"github.com/gohugoio/hugo/resources"
"github.com/gohugoio/hugo/resources/page"
"github.com/gohugoio/hugo/resources/resource"
)
var (
_ page.Page = (*pageState)(nil)
_ collections.Grouper = (*pageState)(nil)
_ collections.Slicer = (*pageState)(nil)
)
var (
pageTypesProvider = resource.NewResourceTypesProvider(media.OctetType, pageResourceType)
nopPageOutput = &pageOutput{pagePerOutputProviders: nopPagePerOutput}
)
// pageContext provides contextual information about this page, for error
// logging and similar.
type pageContext interface {
posOffset(offset int) text.Position
wrapError(err error) error
getContentConverter() converter.Converter
}
// wrapErr adds some context to the given error if possible.
func wrapErr(err error, ctx interface{}) error {
if pc, ok := ctx.(pageContext); ok {
return pc.wrapError(err)
}
return err
}
type pageSiteAdapter struct {
p page.Page
s *Site
}
func (pa pageSiteAdapter) GetPage(ref string) (page.Page, error) {
p, err := pa.s.getPageNew(pa.p, ref)
if p == nil {
// The nil struct has meaning in some situations, mostly to avoid breaking
// existing sites doing $nilpage.IsDescendant($p), which will always return
// false.
p = page.NilPage
}
return p, err
}
type pageState struct {
// This slice will be of same length as the number of global slice of output
// formats (for all sites).
pageOutputs []*pageOutput
// This will be shifted out when we start to render a new output format.
*pageOutput
// Common for all output formats.
*pageCommon
}
// Eq returns whether the current page equals the given page.
// This is what's invoked when doing `{{ if eq $page $otherPage }}`
func (p *pageState) Eq(other interface{}) bool {
pp, err := unwrapPage(other)
if err != nil {
return false
}
return p == pp
}
func (p *pageState) GitInfo() *gitmap.GitInfo {
return p.gitInfo
}
func (p *pageState) MarshalJSON() ([]byte, error) {
return page.MarshalPageToJSON(p)
}
func (p *pageState) getPages() page.Pages {
b := p.bucket
if b == nil {
return nil
}
return b.getPages()
}
func (p *pageState) getPagesAndSections() page.Pages {
b := p.bucket
if b == nil {
return nil
}
return b.getPagesAndSections()
}
// TODO(bep) cm add a test
func (p *pageState) RegularPages() page.Pages {
p.regularPagesInit.Do(func() {
var pages page.Pages
switch p.Kind() {
case page.KindPage:
case page.KindSection, page.KindHome, page.KindTaxonomyTerm:
pages = p.getPages()
case page.KindTaxonomy:
all := p.Pages()
for _, p := range all {
if p.IsPage() {
pages = append(pages, p)
}
}
default:
pages = p.s.RegularPages()
}
p.regularPages = pages
})
return p.regularPages
}
func (p *pageState) Pages() page.Pages {
p.pagesInit.Do(func() {
var pages page.Pages
switch p.Kind() {
case page.KindPage:
case page.KindSection, page.KindHome:
pages = p.getPagesAndSections()
case page.KindTaxonomy:
termInfo := p.bucket
plural := maps.GetString(termInfo.meta, "plural")
term := maps.GetString(termInfo.meta, "termKey")
taxonomy := p.s.Taxonomies[plural].Get(term)
pages = taxonomy.Pages()
case page.KindTaxonomyTerm:
pages = p.getPagesAndSections()
default:
pages = p.s.Pages()
}
p.pages = pages
})
return p.pages
}
// RawContent returns the un-rendered source content without
// any leading front matter.
func (p *pageState) RawContent() string {
if p.source.parsed == nil {
return ""
}
start := p.source.posMainContent
if start == -1 {
start = 0
}
return string(p.source.parsed.Input()[start:])
}
func (p *pageState) Resources() resource.Resources {
p.resourcesInit.Do(func() {
sort := func() {
sort.SliceStable(p.resources, func(i, j int) bool {
ri, rj := p.resources[i], p.resources[j]
if ri.ResourceType() < rj.ResourceType() {
return true
}
p1, ok1 := ri.(page.Page)
p2, ok2 := rj.(page.Page)
if ok1 != ok2 {
return ok2
}
if ok1 {
return page.DefaultPageSort(p1, p2)
}
return ri.RelPermalink() < rj.RelPermalink()
})
}
sort()
if len(p.m.resourcesMetadata) > 0 {
resources.AssignMetadata(p.m.resourcesMetadata, p.resources...)
sort()
}
})
return p.resources
}
func (p *pageState) HasShortcode(name string) bool {
if p.shortcodeState == nil {
return false
}
return p.shortcodeState.nameSet[name]
}
func (p *pageState) Site() page.Site {
return &p.s.Info
}
func (p *pageState) String() string {
if sourceRef := p.sourceRef(); sourceRef != "" {
return fmt.Sprintf("Page(%s)", sourceRef)
}
return fmt.Sprintf("Page(%q)", p.Title())
}
// IsTranslated returns whether this content file is translated to
// other language(s).
func (p *pageState) IsTranslated() bool {
p.s.h.init.translations.Do()
return len(p.translations) > 0
}
// TranslationKey returns the key used to map language translations of this page.
// It will use the translationKey set in front matter if set, or the content path and
// filename (excluding any language code and extension), e.g. "about/index".
// The Page Kind is always prepended.
func (p *pageState) TranslationKey() string {
p.translationKeyInit.Do(func() {
if p.m.translationKey != "" {
p.translationKey = p.Kind() + "/" + p.m.translationKey
} else if p.IsPage() && !p.File().IsZero() {
p.translationKey = path.Join(p.Kind(), filepath.ToSlash(p.File().Dir()), p.File().TranslationBaseName())
} else if p.IsNode() {
p.translationKey = path.Join(p.Kind(), p.SectionsPath())
}
})
return p.translationKey
}
// AllTranslations returns all translations, including the current Page.
func (p *pageState) AllTranslations() page.Pages {
p.s.h.init.translations.Do()
return p.allTranslations
}
// Translations returns the translations excluding the current Page.
func (p *pageState) Translations() page.Pages {
p.s.h.init.translations.Do()
return p.translations
}
func (ps *pageState) initCommonProviders(pp pagePaths) error {
if ps.IsPage() {
ps.posNextPrev = &nextPrev{init: ps.s.init.prevNext}
ps.posNextPrevSection = &nextPrev{init: ps.s.init.prevNextInSection}
ps.InSectionPositioner = newPagePositionInSection(ps.posNextPrevSection)
ps.Positioner = newPagePosition(ps.posNextPrev)
}
ps.OutputFormatsProvider = pp
ps.targetPathDescriptor = pp.targetPathDescriptor
ps.RefProvider = newPageRef(ps)
ps.SitesProvider = &ps.s.Info
return nil
}
func (p *pageState) getLayoutDescriptor() output.LayoutDescriptor {
p.layoutDescriptorInit.Do(func() {
var section string
sections := p.SectionsEntries()
switch p.Kind() {
case page.KindSection:
if len(sections) > 0 {
section = sections[0]
}
case page.KindTaxonomyTerm, page.KindTaxonomy:
section = maps.GetString(p.bucket.meta, "singular")
default:
}
p.layoutDescriptor = output.LayoutDescriptor{
Kind: p.Kind(),
Type: p.Type(),
Lang: p.Language().Lang,
Layout: p.Layout(),
Section: section,
}
})
return p.layoutDescriptor
}
func (p *pageState) getLayouts(layouts ...string) ([]string, error) {
f := p.outputFormat()
if len(layouts) == 0 {
selfLayout := p.selfLayoutForOutput(f)
if selfLayout != "" {
return []string{selfLayout}, nil
}
}
layoutDescriptor := p.getLayoutDescriptor()
if len(layouts) > 0 {
layoutDescriptor.Layout = layouts[0]
layoutDescriptor.LayoutOverride = true
}
return p.s.layoutHandler.For(layoutDescriptor, f)
}
// This is serialized
func (p *pageState) initOutputFormat(isRenderingSite bool, idx int) error {
if err := p.shiftToOutputFormat(isRenderingSite, idx); err != nil {
return err
}
if !p.renderable {
if _, err := p.Content(); err != nil {
return err
}
}
return nil
}
// Must be run after the site section tree etc. is built and ready.
func (p *pageState) initPage() error {
if _, err := p.init.Do(); err != nil {
return err
}
return nil
}
func (p *pageState) renderResources() (err error) {
p.resourcesPublishInit.Do(func() {
var toBeDeleted []int
for i, r := range p.Resources() {
if _, ok := r.(page.Page); ok {
// Pages gets rendered with the owning page but we count them here.
p.s.PathSpec.ProcessingStats.Incr(&p.s.PathSpec.ProcessingStats.Pages)
continue
}
src, ok := r.(resource.Source)
if !ok {
err = errors.Errorf("Resource %T does not support resource.Source", src)
return
}
if err := src.Publish(); err != nil {
if os.IsNotExist(err) {
// The resource has been deleted from the file system.
// This should be extremely rare, but can happen on live reload in server
// mode when the same resource is member of different page bundles.
toBeDeleted = append(toBeDeleted, i)
} else {
p.s.Log.ERROR.Printf("Failed to publish Resource for page %q: %s", p.pathOrTitle(), err)
}
} else {
p.s.PathSpec.ProcessingStats.Incr(&p.s.PathSpec.ProcessingStats.Files)
}
}
for _, i := range toBeDeleted {
p.deleteResource(i)
}
})
return
}
func (p *pageState) deleteResource(i int) {
p.resources = append(p.resources[:i], p.resources[i+1:]...)
}
func (p *pageState) getTargetPaths() page.TargetPaths {
return p.targetPaths()
}
func (p *pageState) setTranslations(pages page.Pages) {
p.allTranslations = pages
page.SortByLanguage(p.allTranslations)
translations := make(page.Pages, 0)
for _, t := range p.allTranslations {
if !t.Eq(p) {
translations = append(translations, t)
}
}
p.translations = translations
}
func (p *pageState) AlternativeOutputFormats() page.OutputFormats {
f := p.outputFormat()
var o page.OutputFormats
for _, of := range p.OutputFormats() {
if of.Format.NotAlternative || of.Format.Name == f.Name {
continue
}
o = append(o, of)
}
return o
}
func (p *pageState) Render(layout ...string) template.HTML {
l, err := p.getLayouts(layout...)
if err != nil {
p.s.SendError(p.wrapError(errors.Errorf(".Render: failed to resolve layout %v", layout)))
return ""
}
for _, layout := range l {
templ, found := p.s.Tmpl.Lookup(layout)
if !found {
// This is legacy from when we had only one output format and
// HTML templates only. Some have references to layouts without suffix.
// We default to good old HTML.
templ, _ = p.s.Tmpl.Lookup(layout + ".html")
}
if templ != nil {
res, err := executeToString(templ, p)
if err != nil {
p.s.SendError(p.wrapError(errors.Wrapf(err, ".Render: failed to execute template %q v", layout)))
return ""
}
return template.HTML(res)
}
}
return ""
}
// wrapError adds some more context to the given error if possible
func (p *pageState) wrapError(err error) error {
var filename string
if !p.File().IsZero() {
filename = p.File().Filename()
}
err, _ = herrors.WithFileContextForFile(
err,
filename,
filename,
p.s.SourceSpec.Fs.Source,
herrors.SimpleLineMatcher)
return err
}
func (p *pageState) getContentConverter() converter.Converter {
return p.m.contentConverter
}
func (p *pageState) addResources(r ...resource.Resource) {
p.resources = append(p.resources, r...)
}
func (p *pageState) mapContent(bucket *pagesMapBucket, meta *pageMeta) error {
s := p.shortcodeState
p.renderable = true
rn := &pageContentMap{
items: make([]interface{}, 0, 20),
}
iter := p.source.parsed.Iterator()
fail := func(err error, i pageparser.Item) error {
return p.parseError(err, iter.Input(), i.Pos)
}
// the parser is guaranteed to return items in proper order or fail, so …
// … it's safe to keep some "global" state
var currShortcode shortcode
var ordinal int
Loop:
for {
it := iter.Next()
switch {
case it.Type == pageparser.TypeIgnore:
case it.Type == pageparser.TypeHTMLStart:
// This is HTML without front matter. It can still have shortcodes.
p.selfLayout = "__" + p.File().Filename()
p.renderable = false
rn.AddBytes(it)
case it.IsFrontMatter():
f := metadecoders.FormatFromFrontMatterType(it.Type)
m, err := metadecoders.Default.UnmarshalToMap(it.Val, f)
if err != nil {
if fe, ok := err.(herrors.FileError); ok {
return herrors.ToFileErrorWithOffset(fe, iter.LineNumber()-1)
} else {
return err
}
}
if err := meta.setMetadata(bucket, p, m); err != nil {
return err
}
next := iter.Peek()
if !next.IsDone() {
p.source.posMainContent = next.Pos
}
if !p.s.shouldBuild(p) {
// Nothing more to do.
return nil
}
case it.Type == pageparser.TypeLeadSummaryDivider:
posBody := -1
f := func(item pageparser.Item) bool {
if posBody == -1 && !item.IsDone() {
posBody = item.Pos
}
if item.IsNonWhitespace() {
p.truncated = true
// Done
return false
}
return true
}
iter.PeekWalk(f)
p.source.posSummaryEnd = it.Pos
p.source.posBodyStart = posBody
p.source.hasSummaryDivider = true
if meta.markup != "html" {
// The content will be rendered by Blackfriday or similar,
// and we need to track the summary.
rn.AddReplacement(internalSummaryDividerPre, it)
}
// Handle shortcode
case it.IsLeftShortcodeDelim():
// let extractShortcode handle left delim (will do so recursively)
iter.Backup()
currShortcode, err := s.extractShortcode(ordinal, 0, iter)
if err != nil {
return fail(errors.Wrap(err, "failed to extract shortcode"), it)
}
currShortcode.pos = it.Pos
currShortcode.length = iter.Current().Pos - it.Pos
if currShortcode.placeholder == "" {
currShortcode.placeholder = createShortcodePlaceholder("s", currShortcode.ordinal)
}
if currShortcode.name != "" {
s.nameSet[currShortcode.name] = true
}
if currShortcode.params == nil {
var s []string
currShortcode.params = s
}
currShortcode.placeholder = createShortcodePlaceholder("s", ordinal)
ordinal++
s.shortcodes = append(s.shortcodes, currShortcode)
rn.AddShortcode(currShortcode)
case it.Type == pageparser.TypeEmoji:
if emoji := helpers.Emoji(it.ValStr()); emoji != nil {
rn.AddReplacement(emoji, it)
} else {
rn.AddBytes(it)
}
case it.IsEOF():
break Loop
case it.IsError():
err := fail(errors.WithStack(errors.New(it.ValStr())), it)
currShortcode.err = err
return err
default:
rn.AddBytes(it)
}
}
p.cmap = rn
return nil
}
func (p *pageState) errorf(err error, format string, a ...interface{}) error {
if herrors.UnwrapErrorWithFileContext(err) != nil {
// More isn't always better.
return err
}
args := append([]interface{}{p.Language().Lang, p.pathOrTitle()}, a...)
format = "[%s] page %q: " + format
if err == nil {
errors.Errorf(format, args...)
return fmt.Errorf(format, args...)
}
return errors.Wrapf(err, format, args...)
}
func (p *pageState) outputFormat() (f output.Format) {
if p.pageOutput == nil {
panic("no pageOutput")
}
return p.pageOutput.f
}
func (p *pageState) parseError(err error, input []byte, offset int) error {
if herrors.UnwrapFileError(err) != nil {
// Use the most specific location.
return err
}
pos := p.posFromInput(input, offset)
return herrors.NewFileError("md", -1, pos.LineNumber, pos.ColumnNumber, err)
}
func (p *pageState) pathOrTitle() string {
if !p.File().IsZero() {
return p.File().Filename()
}
if p.Path() != "" {
return p.Path()
}
return p.Title()
}
func (p *pageState) posFromPage(offset int) text.Position {
return p.posFromInput(p.source.parsed.Input(), offset)
}
func (p *pageState) posFromInput(input []byte, offset int) text.Position {
lf := []byte("\n")
input = input[:offset]
lineNumber := bytes.Count(input, lf) + 1
endOfLastLine := bytes.LastIndex(input, lf)
return text.Position{
Filename: p.pathOrTitle(),
LineNumber: lineNumber,
ColumnNumber: offset - endOfLastLine,
Offset: offset,
}
}
func (p *pageState) posOffset(offset int) text.Position {
return p.posFromInput(p.source.parsed.Input(), offset)
}
// shiftToOutputFormat is serialized. The output format idx refers to the
// full set of output formats for all sites.
func (p *pageState) shiftToOutputFormat(isRenderingSite bool, idx int) error {
if err := p.initPage(); err != nil {
return err
}
if idx >= len(p.pageOutputs) {
panic(fmt.Sprintf("invalid page state for %q: got output format index %d, have %d", p.pathOrTitle(), idx, len(p.pageOutputs)))
}
p.pageOutput = p.pageOutputs[idx]
if p.pageOutput == nil {
panic(fmt.Sprintf("pageOutput is nil for output idx %d", idx))
}
// Reset any built paginator. This will trigger when re-rendering pages in
// server mode.
if isRenderingSite && p.pageOutput.paginator != nil && p.pageOutput.paginator.current != nil {
p.pageOutput.paginator.reset()
}
if idx > 0 {
// Check if we can reuse content from one of the previous formats.
for i := idx - 1; i >= 0; i-- {
po := p.pageOutputs[i]
if po.cp != nil && po.cp.reuse {
p.pageOutput.cp = po.cp
break
}
}
}
for _, r := range p.Resources().ByType(pageResourceType) {
rp := r.(*pageState)
if err := rp.shiftToOutputFormat(isRenderingSite, idx); err != nil {
return errors.Wrap(err, "failed to shift outputformat in Page resource")
}
}
return nil
}
// sourceRef returns the reference used by GetPage and ref/relref shortcodes to refer to
// this page. It is prefixed with a "/".
//
// For pages that have a source file, it is returns the path to this file as an
// absolute path rooted in this site's content dir.
// For pages that do not (sections witout content page etc.), it returns the
// virtual path, consistent with where you would add a source file.
func (p *pageState) sourceRef() string {
if !p.File().IsZero() {
sourcePath := p.File().Path()
if sourcePath != "" {
return "/" + filepath.ToSlash(sourcePath)
}
}
if len(p.SectionsEntries()) > 0 {
// no backing file, return the virtual source path
return "/" + p.SectionsPath()
}
return ""
}
type pageStatePages []*pageState
// Implement sorting.
func (ps pageStatePages) Len() int { return len(ps) }
func (ps pageStatePages) Less(i, j int) bool { return page.DefaultPageSort(ps[i], ps[j]) }
func (ps pageStatePages) Swap(i, j int) { ps[i], ps[j] = ps[j], ps[i] }
// findPagePos Given a page, it will find the position in Pages
// will return -1 if not found
func (ps pageStatePages) findPagePos(page *pageState) int {
for i, x := range ps {
if x.File().Filename() == page.File().Filename() {
return i
}
}
return -1
}
func (ps pageStatePages) findPagePosByFilename(filename string) int {
for i, x := range ps {
if x.File().Filename() == filename {
return i
}
}
return -1
}
func (ps pageStatePages) findPagePosByFilnamePrefix(prefix string) int {
if prefix == "" {
return -1
}
lenDiff := -1
currPos := -1
prefixLen := len(prefix)
// Find the closest match
for i, x := range ps {
if strings.HasPrefix(x.File().Filename(), prefix) {
diff := len(x.File().Filename()) - prefixLen
if lenDiff == -1 || diff < lenDiff {
lenDiff = diff
currPos = i
}
}
}
return currPos
}
func (s *Site) sectionsFromFile(fi source.File) []string {
dirname := fi.Dir()
dirname = strings.Trim(dirname, helpers.FilePathSeparator)
if dirname == "" {
return nil
}
parts := strings.Split(dirname, helpers.FilePathSeparator)
if fii, ok := fi.(*fileInfo); ok {
if len(parts) > 0 && fii.FileInfo().Meta().Classifier() == files.ContentClassLeaf {
// my-section/mybundle/index.md => my-section
return parts[:len(parts)-1]
}
}
return parts
}