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// Copyright 2024 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 render
import (
"bytes"
"math/bits"
"github.com/gohugoio/hugo/markup/converter"
)
type BufWriter struct {
*bytes.Buffer
}
const maxInt = 1<<(bits.UintSize-1) - 1
func (b *BufWriter) Available() int {
return maxInt
}
func (b *BufWriter) Buffered() int {
return b.Len()
}
func (b *BufWriter) Flush() error {
return nil
}
type Context struct {
*BufWriter
positions []int
pids []uint64
ContextData
}
func (ctx *Context) PushPos(n int) {
ctx.positions = append(ctx.positions, n)
}
func (ctx *Context) PopPos() int {
i := len(ctx.positions) - 1
p := ctx.positions[i]
ctx.positions = ctx.positions[:i]
return p
}
// PushPid pushes a new page ID to the stack.
func (ctx *Context) PushPid(pid uint64) {
ctx.pids = append(ctx.pids, pid)
}
// PeekPid returns the current page ID without removing it from the stack.
func (ctx *Context) PeekPid() uint64 {
if len(ctx.pids) == 0 {
return 0
}
return ctx.pids[len(ctx.pids)-1]
}
// PopPid pops the last page ID from the stack.
func (ctx *Context) PopPid() uint64 {
if len(ctx.pids) == 0 {
return 0
}
i := len(ctx.pids) - 1
p := ctx.pids[i]
ctx.pids = ctx.pids[:i]
return p
}
type ContextData interface {
RenderContext() converter.RenderContext
DocumentContext() converter.DocumentContext
}
type RenderContextDataHolder struct {
Rctx converter.RenderContext
Dctx converter.DocumentContext
}
func (ctx *RenderContextDataHolder) RenderContext() converter.RenderContext {
return ctx.Rctx
}
func (ctx *RenderContextDataHolder) DocumentContext() converter.DocumentContext {
return ctx.Dctx
}
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