119 lines
3.5 KiB
Go
119 lines
3.5 KiB
Go
// gomuks - A terminal Matrix client written in Go.
|
|
// Copyright (C) 2018 Tulir Asokan
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package messages
|
|
|
|
// TagWithMeta is an open HTML tag with some metadata (e.g. list index, a href value).
|
|
type TagWithMeta struct {
|
|
Tag string
|
|
Counter int
|
|
Meta string
|
|
Text string
|
|
}
|
|
|
|
// BlankTag is a blank TagWithMeta object.
|
|
var BlankTag = &TagWithMeta{}
|
|
|
|
// TagArray is a reversed queue for remembering what HTML tags are open.
|
|
type TagArray []*TagWithMeta
|
|
|
|
// Pushb converts the given byte array into a string and calls Push().
|
|
func (ta *TagArray) Pushb(tag []byte) {
|
|
ta.Push(string(tag))
|
|
}
|
|
|
|
// Popb converts the given byte array into a string and calls Pop().
|
|
func (ta *TagArray) Popb(tag []byte) *TagWithMeta {
|
|
return ta.Pop(string(tag))
|
|
}
|
|
|
|
// Indexb converts the given byte array into a string and calls Index().
|
|
func (ta *TagArray) Indexb(tag []byte) {
|
|
ta.Index(string(tag))
|
|
}
|
|
|
|
// IndexAfterb converts the given byte array into a string and calls IndexAfter().
|
|
func (ta *TagArray) IndexAfterb(tag []byte, after int) {
|
|
ta.IndexAfter(string(tag), after)
|
|
}
|
|
|
|
// Push adds the given tag to the array.
|
|
func (ta *TagArray) Push(tag string) {
|
|
ta.PushMeta(&TagWithMeta{Tag: tag})
|
|
}
|
|
|
|
// Push adds the given tag to the array.
|
|
func (ta *TagArray) PushMeta(tag *TagWithMeta) {
|
|
*ta = append(*ta, BlankTag)
|
|
copy((*ta)[1:], *ta)
|
|
(*ta)[0] = tag
|
|
}
|
|
|
|
// Pop removes the given tag from the array.
|
|
func (ta *TagArray) Pop(tag string) (removed *TagWithMeta) {
|
|
if (*ta)[0].Tag == tag {
|
|
// This is the default case and is lighter than append(), so we handle it separately.
|
|
removed = (*ta)[0]
|
|
*ta = (*ta)[1:]
|
|
} else if index := ta.Index(tag); index != -1 {
|
|
removed = (*ta)[index]
|
|
*ta = append((*ta)[:index], (*ta)[index+1:]...)
|
|
}
|
|
return
|
|
}
|
|
|
|
// Index returns the first index where the given tag is, or -1 if it's not in the list.
|
|
func (ta *TagArray) Index(tag string) int {
|
|
return ta.IndexAfter(tag, -1)
|
|
}
|
|
|
|
// IndexAfter returns the first index after the given index where the given tag is,
|
|
// or -1 if the given tag is not on the list after the given index.
|
|
func (ta *TagArray) IndexAfter(tag string, after int) int {
|
|
for i := after + 1; i < len(*ta); i++ {
|
|
if (*ta)[i].Tag == tag {
|
|
return i
|
|
}
|
|
}
|
|
return -1
|
|
}
|
|
|
|
// Get returns the first occurrence of the given tag, or nil if it's not in the list.
|
|
func (ta *TagArray) Get(tag string) *TagWithMeta {
|
|
return ta.GetAfter(tag, -1)
|
|
}
|
|
|
|
// IndexAfter returns the first occurrence of the given tag, or nil if the given
|
|
// tag is not on the list after the given index.
|
|
func (ta *TagArray) GetAfter(tag string, after int) *TagWithMeta {
|
|
for i := after + 1; i < len(*ta); i++ {
|
|
if (*ta)[i].Tag == tag {
|
|
return (*ta)[i]
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Has returns whether or not the list has at least one of the given tags.
|
|
func (ta *TagArray) Has(tags ...string) bool {
|
|
for _, tag := range tags {
|
|
if index := ta.Index(tag); index != -1 {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|