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Move special list/blockquote prefixing to renderer

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This commit is contained in:
Tulir Asokan
2019-04-07 22:25:53 +03:00
parent cf93671ecd
commit e6180c9b6f
2 changed files with 200 additions and 110 deletions
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135
ui/messages/parser/htmlparser.go
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@ -17,8 +17,6 @@
package parser
import (
"fmt"
"math"
"regexp"
"strconv"
"strings"
@ -29,11 +27,11 @@ import (
"github.com/lucasb-eyer/go-colorful"
"golang.org/x/net/html"
"maunium.net/go/gomuks/ui/messages"
"maunium.net/go/mautrix"
"maunium.net/go/tcell"
"maunium.net/go/gomuks/matrix/rooms"
"maunium.net/go/gomuks/ui/messages"
"maunium.net/go/gomuks/ui/widget"
)
@ -80,57 +78,30 @@ func (parser *htmlParser) getAttribute(node *html.Node, attribute string) string
return ""
}
func digits(num int) int {
if num <= 0 {
return 0
}
return int(math.Floor(math.Log10(float64(num))) + 1)
}
func (parser *htmlParser) listToTString(node *html.Node, stripLinebreak bool) *messages.HTMLEntity {
func (parser *htmlParser) listToEntity(node *html.Node, stripLinebreak bool) messages.HTMLEntity {
children := parser.nodeToEntities(node.FirstChild, stripLinebreak)
ordered := node.Data == "ol"
listItems := parser.nodeToEntities(node.FirstChild, stripLinebreak)
counter := 1
indentLength := 0
start := 1
if ordered {
start := parser.getAttribute(node, "start")
if len(start) > 0 {
counter, _ = strconv.Atoi(start)
if startRaw := parser.getAttribute(node, "start"); len(startRaw) > 0 {
var err error
start, err = strconv.Atoi(startRaw)
if err != nil {
start = 1
}
}
longestIndex := (counter - 1) + len(listItems)
indentLength = digits(longestIndex)
}
var children []*messages.HTMLEntity
for _, child := range listItems {
if child.Tag != "li" {
continue
listItems := children[:0]
for _, child := range children {
if child.GetTag() == "li" {
listItems = append(listItems, child)
}
var prefix string
if ordered {
indexPadding := indentLength - digits(counter)
prefix = fmt.Sprintf("%d. %s", counter, strings.Repeat(" ", indexPadding))
} else {
prefix = "● "
}
child.Text = prefix + child.Text
child.Block = true
child.Indent = indentLength + 2
children = append(children, child)
counter++
}
return &messages.HTMLEntity{
Tag: node.Data,
Text: "",
Style: tcell.StyleDefault,
Children: children,
Block: true,
Indent: 0,
}
return messages.NewListEntity(ordered, start, listItems)
}
func (parser *htmlParser) basicFormatToEntity(node *html.Node, stripLinebreak bool) *messages.HTMLEntity {
entity := &messages.HTMLEntity{
func (parser *htmlParser) basicFormatToEntity(node *html.Node, stripLinebreak bool) messages.HTMLEntity {
entity := &messages.BaseHTMLEntity{
Tag: node.Data,
Children: parser.nodeToEntities(node.FirstChild, stripLinebreak),
}
@ -178,28 +149,22 @@ func (parser *htmlParser) parseColor(node *html.Node, mainName, altName string)
return tcell.NewRGBColor(int32(r), int32(g), int32(b)), true
}
func (parser *htmlParser) headerToEntity(node *html.Node, stripLinebreak bool) *messages.HTMLEntity {
func (parser *htmlParser) headerToEntity(node *html.Node, stripLinebreak bool) messages.HTMLEntity {
length := int(node.Data[1] - '0')
prefix := strings.Repeat("#", length) + " "
return (&messages.HTMLEntity{
return (&messages.BaseHTMLEntity{
Tag: node.Data,
Text: prefix,
Children: parser.nodeToEntities(node.FirstChild, stripLinebreak),
}).AdjustStyle(AdjustStyleBold)
}
func (parser *htmlParser) blockquoteToEntity(node *html.Node, stripLinebreak bool) *messages.HTMLEntity {
return &messages.HTMLEntity{
Tag: "blockquote",
Text: ">",
Children: parser.nodeToEntities(node.FirstChild, stripLinebreak),
Block: true,
Indent: 2,
}
func (parser *htmlParser) blockquoteToEntity(node *html.Node, stripLinebreak bool) messages.HTMLEntity {
return messages.NewBlockquoteEntity(parser.nodeToEntities(node.FirstChild, stripLinebreak))
}
func (parser *htmlParser) linkToEntity(node *html.Node, stripLinebreak bool) *messages.HTMLEntity {
entity := &messages.HTMLEntity{
func (parser *htmlParser) linkToEntity(node *html.Node, stripLinebreak bool) messages.HTMLEntity {
entity := &messages.BaseHTMLEntity{
Tag: "a",
Children: parser.nodeToEntities(node.FirstChild, stripLinebreak),
}
@ -223,7 +188,7 @@ func (parser *htmlParser) linkToEntity(node *html.Node, stripLinebreak bool) *me
return entity
}
func (parser *htmlParser) imageToEntity(node *html.Node) *messages.HTMLEntity {
func (parser *htmlParser) imageToEntity(node *html.Node) messages.HTMLEntity {
alt := parser.getAttribute(node, "alt")
if len(alt) == 0 {
alt = parser.getAttribute(node, "title")
@ -231,7 +196,7 @@ func (parser *htmlParser) imageToEntity(node *html.Node) *messages.HTMLEntity {
alt = "[inline image]"
}
}
entity := &messages.HTMLEntity{
entity := &messages.BaseHTMLEntity{
Tag: "img",
Text: alt,
}
@ -255,7 +220,7 @@ func styleEntryToStyle(se chroma.StyleEntry) tcell.Style {
Background(colourToColor(se.Background))
}
func (parser *htmlParser) syntaxHighlight(text, language string) *messages.HTMLEntity {
func (parser *htmlParser) syntaxHighlight(text, language string) messages.HTMLEntity {
lexer := lexers.Get(language)
if lexer == nil {
return nil
@ -266,12 +231,12 @@ func (parser *htmlParser) syntaxHighlight(text, language string) *messages.HTMLE
}
style := styles.SolarizedDark
tokens := iter.Tokens()
children := make([]*messages.HTMLEntity, len(tokens))
children := make([]messages.HTMLEntity, len(tokens))
for i, token := range tokens {
if token.Value == "\n" {
children[i] = &messages.HTMLEntity{Block: true, Tag: "br"}
children[i] = &messages.BaseHTMLEntity{Block: true, Tag: "br"}
} else {
children[i] = &messages.HTMLEntity{
children[i] = &messages.BaseHTMLEntity{
Tag: token.Type.String(),
Text: token.Value,
Style: styleEntryToStyle(style.Get(token.Type)),
@ -280,21 +245,21 @@ func (parser *htmlParser) syntaxHighlight(text, language string) *messages.HTMLE
}
}
}
return &messages.HTMLEntity{
return &messages.BaseHTMLEntity{
Tag: "pre",
Block: true,
Children: children,
}
}
func (parser *htmlParser) codeblockToEntity(node *html.Node) *messages.HTMLEntity {
entity := &messages.HTMLEntity{
func (parser *htmlParser) codeblockToEntity(node *html.Node) messages.HTMLEntity {
entity := &messages.BaseHTMLEntity{
Tag: "pre",
Block: true,
}
// TODO allow disabling syntax highlighting
if node.FirstChild.Type == html.ElementNode && node.FirstChild.Data == "code" {
text := (&messages.HTMLEntity{
text := (&messages.BaseHTMLEntity{
Children: parser.nodeToEntities(node.FirstChild.FirstChild, false),
}).PlainText()
attr := parser.getAttribute(node.FirstChild, "class")
@ -315,16 +280,16 @@ func (parser *htmlParser) codeblockToEntity(node *html.Node) *messages.HTMLEntit
return entity
}
func (parser *htmlParser) tagNodeToEntity(node *html.Node, stripLinebreak bool) *messages.HTMLEntity {
func (parser *htmlParser) tagNodeToEntity(node *html.Node, stripLinebreak bool) messages.HTMLEntity {
switch node.Data {
case "blockquote":
return parser.blockquoteToEntity(node, stripLinebreak)
case "ol", "ul":
return parser.listToTString(node, stripLinebreak)
return parser.listToEntity(node, stripLinebreak)
case "h1", "h2", "h3", "h4", "h5", "h6":
return parser.headerToEntity(node, stripLinebreak)
case "br":
return &messages.HTMLEntity{Tag: "br", Block: true}
return &messages.BaseHTMLEntity{Tag: "br", Block: true}
case "b", "strong", "i", "em", "s", "del", "u", "ins", "font":
return parser.basicFormatToEntity(node, stripLinebreak)
case "a":
@ -334,7 +299,7 @@ func (parser *htmlParser) tagNodeToEntity(node *html.Node, stripLinebreak bool)
case "pre":
return parser.codeblockToEntity(node)
default:
return &messages.HTMLEntity{
return &messages.BaseHTMLEntity{
Tag: node.Data,
Children: parser.nodeToEntities(node.FirstChild, stripLinebreak),
Block: parser.isBlockTag(node.Data),
@ -342,13 +307,13 @@ func (parser *htmlParser) tagNodeToEntity(node *html.Node, stripLinebreak bool)
}
}
func (parser *htmlParser) singleNodeToEntity(node *html.Node, stripLinebreak bool) *messages.HTMLEntity {
func (parser *htmlParser) singleNodeToEntity(node *html.Node, stripLinebreak bool) messages.HTMLEntity {
switch node.Type {
case html.TextNode:
if stripLinebreak {
node.Data = strings.Replace(node.Data, "\n", "", -1)
}
return &messages.HTMLEntity{
return &messages.BaseHTMLEntity{
Tag: "text",
Text: node.Data,
}
@ -358,7 +323,7 @@ func (parser *htmlParser) singleNodeToEntity(node *html.Node, stripLinebreak boo
if node.FirstChild.Data == "html" && node.FirstChild.NextSibling == nil {
return parser.singleNodeToEntity(node.FirstChild, stripLinebreak)
}
return &messages.HTMLEntity{
return &messages.BaseHTMLEntity{
Tag: "html",
Children: parser.nodeToEntities(node.FirstChild, stripLinebreak),
Block: true,
@ -368,7 +333,7 @@ func (parser *htmlParser) singleNodeToEntity(node *html.Node, stripLinebreak boo
}
}
func (parser *htmlParser) nodeToEntities(node *html.Node, stripLinebreak bool) (entities []*messages.HTMLEntity) {
func (parser *htmlParser) nodeToEntities(node *html.Node, stripLinebreak bool) (entities []messages.HTMLEntity) {
for ; node != nil; node = node.NextSibling {
if entity := parser.singleNodeToEntity(node, stripLinebreak); entity != nil {
entities = append(entities, entity)
@ -377,7 +342,7 @@ func (parser *htmlParser) nodeToEntities(node *html.Node, stripLinebreak bool) (
return
}
var BlockTags = []string{"p", "h1", "h2", "h3", "h4", "h5", "h6", "ol", "ul", "pre", "blockquote", "div", "hr", "table"}
var BlockTags = []string{"p", "h1", "h2", "h3", "h4", "h5", "h6", "ol", "ul", "li", "pre", "blockquote", "div", "hr", "table"}
func (parser *htmlParser) isBlockTag(tag string) bool {
for _, blockTag := range BlockTags {
@ -388,27 +353,27 @@ func (parser *htmlParser) isBlockTag(tag string) bool {
return false
}
func (parser *htmlParser) Parse(htmlData string) *messages.HTMLEntity {
func (parser *htmlParser) Parse(htmlData string) messages.HTMLEntity {
node, _ := html.Parse(strings.NewReader(htmlData))
return parser.singleNodeToEntity(node, true)
}
// ParseHTMLMessage parses a HTML-formatted Matrix event into a UIMessage.
func ParseHTMLMessage(room *rooms.Room, evt *mautrix.Event, senderDisplayname string) *messages.HTMLEntity {
func ParseHTMLMessage(room *rooms.Room, evt *mautrix.Event, senderDisplayname string) messages.HTMLEntity {
htmlData := evt.Content.FormattedBody
htmlData = strings.Replace(htmlData, "\t", " ", -1)
parser := htmlParser{room}
root := parser.Parse(htmlData)
root.Block = false
root.(*messages.BaseHTMLEntity).Block = false
if evt.Content.MsgType == mautrix.MsgEmote {
root = &messages.HTMLEntity{
root = &messages.BaseHTMLEntity{
Tag: "emote",
Children: []*messages.HTMLEntity{
{Text: "* "},
{Text: senderDisplayname, Style: tcell.StyleDefault.Foreground(widget.GetHashColor(evt.Sender))},
{Text: " "},
Children: []messages.HTMLEntity{
messages.NewHTMLTextEntity("* "),
messages.NewHTMLTextEntity("* ").AdjustStyle(AdjustStyleTextColor(widget.GetHashColor(evt.Sender))),
messages.NewHTMLTextEntity(" "),
root,
},
}