91 lines
2.5 KiB
Go
91 lines
2.5 KiB
Go
// gomuks - A terminal Matrix client written in Go.
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// Copyright (C) 2018 Tulir Asokan
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package messages
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import (
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"encoding/gob"
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"regexp"
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"time"
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"maunium.net/go/gomuks/ui/messages/tstring"
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)
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func init() {
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gob.Register(BaseTextMessage{})
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}
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type BaseTextMessage struct {
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BaseMessage
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}
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func newBaseTextMessage(id, sender, displayname, msgtype string, timestamp time.Time) BaseTextMessage {
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return BaseTextMessage{newBaseMessage(id, sender, displayname, msgtype, timestamp)}
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}
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// Regular expressions used to split lines when calculating the buffer.
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//
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// From tview/textview.go
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var (
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boundaryPattern = regexp.MustCompile("([[:punct:]]\\s*|\\s+)")
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spacePattern = regexp.MustCompile(`\s+`)
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)
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// CalculateBuffer generates the internal buffer for this message that consists
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// of the text of this message split into lines at most as wide as the width
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// parameter.
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func (msg *BaseTextMessage) calculateBufferWithText(text tstring.TString, width int) {
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if width < 2 {
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return
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}
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msg.buffer = []tstring.TString{}
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forcedLinebreaks := text.Split('\n')
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newlines := 0
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for _, str := range forcedLinebreaks {
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if len(str) == 0 && newlines < 1 {
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msg.buffer = append(msg.buffer, tstring.TString{})
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newlines++
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} else {
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newlines = 0
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}
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// Mostly from tview/textview.go#reindexBuffer()
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for len(str) > 0 {
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extract := str.Truncate(width)
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if len(extract) < len(str) {
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if spaces := spacePattern.FindStringIndex(str[len(extract):].String()); spaces != nil && spaces[0] == 0 {
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extract = str[:len(extract)+spaces[1]]
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}
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matches := boundaryPattern.FindAllStringIndex(extract.String(), -1)
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if len(matches) > 0 {
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match := matches[len(matches)-1]
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if len(match) >= 2 {
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until := match[1]
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if until < len(extract) {
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extract = extract[:until]
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}
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}
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}
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}
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msg.buffer = append(msg.buffer, extract)
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str = str[len(extract):]
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}
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}
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msg.prevBufferWidth = width
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}
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