mirror of
https://github.com/diamondburned/cchat-discord.git
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105 lines
2.2 KiB
Go
105 lines
2.2 KiB
Go
package segments
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import (
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"github.com/diamondburned/cchat/text"
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"github.com/diamondburned/ningen/md"
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"github.com/yuin/goldmark/ast"
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)
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type inlineState struct {
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// TODO: use a stack to allow overlapping
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InlineSegment
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}
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func (i *inlineState) add(attr md.Attribute) {
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if attr.Has(md.AttrBold) {
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i.attributes |= text.AttrBold
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}
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if attr.Has(md.AttrItalics) {
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i.attributes |= text.AttrItalics
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}
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if attr.Has(md.AttrUnderline) {
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i.attributes |= text.AttrUnderline
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}
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if attr.Has(md.AttrStrikethrough) {
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i.attributes |= text.AttrStrikethrough
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}
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if attr.Has(md.AttrSpoiler) {
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i.attributes |= text.AttrSpoiler
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}
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if attr.Has(md.AttrMonospace) {
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i.attributes |= text.AttrMonospace
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}
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}
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func (i *inlineState) remove(attr md.Attribute) {
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if attr.Has(md.AttrBold) {
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i.attributes &= ^text.AttrBold
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}
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if attr.Has(md.AttrItalics) {
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i.attributes &= ^text.AttrItalics
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}
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if attr.Has(md.AttrUnderline) {
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i.attributes &= ^text.AttrUnderline
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}
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if attr.Has(md.AttrStrikethrough) {
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i.attributes &= ^text.AttrStrikethrough
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}
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if attr.Has(md.AttrSpoiler) {
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i.attributes &= ^text.AttrSpoiler
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}
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if attr.Has(md.AttrMonospace) {
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i.attributes &= ^text.AttrMonospace
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}
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}
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func (i inlineState) copy() InlineSegment {
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return i.InlineSegment
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}
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type InlineSegment struct {
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start, end int
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attributes text.Attribute
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}
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var _ text.Attributor = (*InlineSegment)(nil)
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// inline parses an inline node. This method at the moment will always create a
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// new segment for overlapping attributes.
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func (r *TextRenderer) inline(n *md.Inline, enter bool) ast.WalkStatus {
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// For instructions on how this works, refer to inline_attr.jpg.
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// Pop the last segment if it's not empty.
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if !r.inls.empty() {
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r.inls.end = r.buf.Len()
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// Only use this section if the length is not zero.
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if r.inls.start != r.inls.end {
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r.append(r.inls.copy())
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}
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}
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if enter {
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r.inls.add(n.Attr)
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} else {
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r.inls.remove(n.Attr)
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}
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// Update the start pointer of the current segment.
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r.inls.start = r.buf.Len()
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return ast.WalkContinue
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}
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func (i InlineSegment) Bounds() (start, end int) {
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return i.start, i.end
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}
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func (i InlineSegment) Attribute() text.Attribute {
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return i.attributes
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}
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func (i InlineSegment) empty() bool {
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return i.attributes == 0 || i.start < i.end
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}
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