mirror of https://gitea.com/gitea/tea.git
96 lines
1.9 KiB
Go
96 lines
1.9 KiB
Go
package ansi
|
|
|
|
import (
|
|
"bytes"
|
|
)
|
|
|
|
// BlockStack is a stack of block elements, used to calculate the current
|
|
// indentation & margin level during the rendering process.
|
|
type BlockStack []BlockElement
|
|
|
|
// Len returns the length of the stack.
|
|
func (s *BlockStack) Len() int {
|
|
return len(*s)
|
|
}
|
|
|
|
// Push appends an item to the stack.
|
|
func (s *BlockStack) Push(e BlockElement) {
|
|
*s = append(*s, e)
|
|
}
|
|
|
|
// Pop removes the last item on the stack.
|
|
func (s *BlockStack) Pop() {
|
|
stack := *s
|
|
if len(stack) == 0 {
|
|
return
|
|
}
|
|
|
|
stack = stack[0 : len(stack)-1]
|
|
*s = stack
|
|
}
|
|
|
|
// Indent returns the current indentation level of all elements in the stack.
|
|
func (s BlockStack) Indent() uint {
|
|
var i uint
|
|
|
|
for _, v := range s {
|
|
if v.Style.Indent == nil {
|
|
continue
|
|
}
|
|
i += *v.Style.Indent
|
|
}
|
|
|
|
return i
|
|
}
|
|
|
|
// Margin returns the current margin level of all elements in the stack.
|
|
func (s BlockStack) Margin() uint {
|
|
var i uint
|
|
|
|
for _, v := range s {
|
|
if v.Style.Margin == nil {
|
|
continue
|
|
}
|
|
i += *v.Style.Margin
|
|
}
|
|
|
|
return i
|
|
}
|
|
|
|
// Width returns the available rendering width
|
|
func (s BlockStack) Width(ctx RenderContext) uint {
|
|
if s.Indent()+s.Margin()*2 > uint(ctx.options.WordWrap) {
|
|
return 0
|
|
}
|
|
return uint(ctx.options.WordWrap) - s.Indent() - s.Margin()*2
|
|
}
|
|
|
|
// Parent returns the current BlockElement's parent.
|
|
func (s BlockStack) Parent() BlockElement {
|
|
if len(s) == 1 {
|
|
return BlockElement{
|
|
Block: &bytes.Buffer{},
|
|
}
|
|
}
|
|
|
|
return s[len(s)-2]
|
|
}
|
|
|
|
// Current returns the current BlockElement.
|
|
func (s BlockStack) Current() BlockElement {
|
|
if len(s) == 0 {
|
|
return BlockElement{
|
|
Block: &bytes.Buffer{},
|
|
}
|
|
}
|
|
|
|
return s[len(s)-1]
|
|
}
|
|
|
|
// With returns a StylePrimitive that inherits the current BlockElement's style.
|
|
func (s BlockStack) With(child StylePrimitive) StylePrimitive {
|
|
sb := StyleBlock{}
|
|
sb.StylePrimitive = child
|
|
return cascadeStyle(s.Current().Style, sb, false).StylePrimitive
|
|
}
|