Add Page.Contents with scope support

Note that this also adds a new `.ContentWithoutSummary` method, and to do that we had to unify the different summary types:

Both `auto` and `manual` now returns HTML. Before this commit, `auto` would return plain text. This could be considered to be a slightly breaking change, but for the better: Now you can treat the `.Summary` the same without thinking about where it comes from, and if you want plain text, pipe it into `{{ .Summary | plainify }}`.

Fixes #8680
Fixes #12761
Fixes #12778
Fixes #716

2 files changed, 0 insertions, 153 deletions

diff --git a/helpers/content.go b/helpers/content.go
index 49283d526..9d74a3d31 100644
--- a/helpers/content.go
+++ b/helpers/content.go
@@ -22,7 +22,6 @@ import (
 	"html/template"
 	"strings"
 	"unicode"
-	"unicode/utf8"
 
 	"github.com/gohugoio/hugo/common/hexec"
 	"github.com/gohugoio/hugo/common/loggers"
@@ -165,75 +164,6 @@ func TotalWords(s string) int {
 	return n
 }
 
-// TruncateWordsByRune truncates words by runes.
-func (c *ContentSpec) TruncateWordsByRune(in []string) (string, bool) {
-	words := make([]string, len(in))
-	copy(words, in)
-
-	count := 0
-	for index, word := range words {
-		if count >= c.Cfg.SummaryLength() {
-			return strings.Join(words[:index], " "), true
-		}
-		runeCount := utf8.RuneCountInString(word)
-		if len(word) == runeCount {
-			count++
-		} else if count+runeCount < c.Cfg.SummaryLength() {
-			count += runeCount
-		} else {
-			for ri := range word {
-				if count >= c.Cfg.SummaryLength() {
-					truncatedWords := append(words[:index], word[:ri])
-					return strings.Join(truncatedWords, " "), true
-				}
-				count++
-			}
-		}
-	}
-
-	return strings.Join(words, " "), false
-}
-
-// TruncateWordsToWholeSentence takes content and truncates to whole sentence
-// limited by max number of words. It also returns whether it is truncated.
-func (c *ContentSpec) TruncateWordsToWholeSentence(s string) (string, bool) {
-	var (
-		wordCount     = 0
-		lastWordIndex = -1
-	)
-
-	for i, r := range s {
-		if unicode.IsSpace(r) {
-			wordCount++
-			lastWordIndex = i
-
-			if wordCount >= c.Cfg.SummaryLength() {
-				break
-			}
-
-		}
-	}
-
-	if lastWordIndex == -1 {
-		return s, false
-	}
-
-	endIndex := -1
-
-	for j, r := range s[lastWordIndex:] {
-		if isEndOfSentence(r) {
-			endIndex = j + lastWordIndex + utf8.RuneLen(r)
-			break
-		}
-	}
-
-	if endIndex == -1 {
-		return s, false
-	}
-
-	return strings.TrimSpace(s[:endIndex]), endIndex < len(s)
-}
-
 // TrimShortHTML removes the outer tags from HTML input where (a) the opening
 // tag is present only once with the input, and (b) the opening and closing
 // tags wrap the input after white space removal.
@@ -256,7 +186,3 @@ func (c *ContentSpec) TrimShortHTML(input []byte, markup string) []byte {
 	}
 	return input
 }
-
-func isEndOfSentence(r rune) bool {
-	return r == '.' || r == '?' || r == '!' || r == '"' || r == '\n'
-}
diff --git a/helpers/content_test.go b/helpers/content_test.go
index 22d468191..dd7c5a4c5 100644
--- a/helpers/content_test.go
+++ b/helpers/content_test.go
@@ -20,7 +20,6 @@ import (
 	"testing"
 
 	qt "github.com/frankban/quicktest"
-	"github.com/gohugoio/hugo/config"
 	"github.com/gohugoio/hugo/helpers"
 )
 
@@ -66,84 +65,6 @@ func TestBytesToHTML(t *testing.T) {
 	c.Assert(helpers.BytesToHTML([]byte("dobedobedo")), qt.Equals, template.HTML("dobedobedo"))
 }
 
-var benchmarkTruncateString = strings.Repeat("This is a sentence about nothing.", 20)
-
-func BenchmarkTestTruncateWordsToWholeSentence(b *testing.B) {
-	c := newTestContentSpec(nil)
-	b.ResetTimer()
-	for i := 0; i < b.N; i++ {
-		c.TruncateWordsToWholeSentence(benchmarkTruncateString)
-	}
-}
-
-func TestTruncateWordsToWholeSentence(t *testing.T) {
-	type test struct {
-		input, expected string
-		max             int
-		truncated       bool
-	}
-	data := []test{
-		{"a b c", "a b c", 12, false},
-		{"a b c", "a b c", 3, false},
-		{"a", "a", 1, false},
-		{"This is a sentence.", "This is a sentence.", 5, false},
-		{"This is also a sentence!", "This is also a sentence!", 1, false},
-		{"To be. Or not to be. That's the question.", "To be.", 1, true},
-		{" \nThis is not a sentence\nAnd this is another", "This is not a sentence", 4, true},
-		{"", "", 10, false},
-		{"This... is a more difficult test?", "This... is a more difficult test?", 1, false},
-	}
-	for i, d := range data {
-		cfg := config.New()
-		cfg.Set("summaryLength", d.max)
-		c := newTestContentSpec(cfg)
-		output, truncated := c.TruncateWordsToWholeSentence(d.input)
-		if d.expected != output {
-			t.Errorf("Test %d failed. Expected %q got %q", i, d.expected, output)
-		}
-
-		if d.truncated != truncated {
-			t.Errorf("Test %d failed. Expected truncated=%t got %t", i, d.truncated, truncated)
-		}
-	}
-}
-
-func TestTruncateWordsByRune(t *testing.T) {
-	type test struct {
-		input, expected string
-		max             int
-		truncated       bool
-	}
-	data := []test{
-		{"", "", 1, false},
-		{"a b c", "a b c", 12, false},
-		{"a b c", "a b c", 3, false},
-		{"a", "a", 1, false},
-		{"Hello 中国", "", 0, true},
-		{"这是中文，全中文。", "这是中文，", 5, true},
-		{"Hello 中国", "Hello 中", 2, true},
-		{"Hello 中国", "Hello 中国", 3, false},
-		{"Hello中国 Good 好的", "Hello中国 Good 好", 9, true},
-		{"This is a sentence.", "This is", 2, true},
-		{"This is also a sentence!", "This", 1, true},
-		{"To be. Or not to be. That's the question.", "To be. Or not", 4, true},
-		{" \nThis is    not a sentence\n ", "This is not", 3, true},
-	}
-	for i, d := range data {
-		cfg := config.New()
-		cfg.Set("summaryLength", d.max)
-		c := newTestContentSpec(cfg)
-		output, truncated := c.TruncateWordsByRune(strings.Fields(d.input))
-		if d.expected != output {
-			t.Errorf("Test %d failed. Expected %q got %q", i, d.expected, output)
-		}
-
-		if d.truncated != truncated {
-			t.Errorf("Test %d failed. Expected truncated=%t got %t", i, d.truncated, truncated)
-		}
-	}
-}
-
 func TestExtractTOCNormalContent(t *testing.T) {
 	content := []byte("<nav>\n<ul>\nTOC<li><a href=\"#")