79 lines
2.7 KiB
QML
79 lines
2.7 KiB
QML
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/*
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Copyright (C) 2020 Slava Monich and other contributors
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This file is part of Fernschreiber.
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Fernschreiber 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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Fernschreiber 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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You should have received a copy of the GNU General Public License
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along with Fernschreiber. If not, see <http://www.gnu.org/licenses/>.
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*/
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import QtQuick 2.0
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import Sailfish.Silica 1.0
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import "../js/twemoji.js" as Emoji
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// Combination of maximumLineCount and TruncationMode.Elide (or Fade) breaks
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// Emoji image alignment, pushing the image down. This one aligns the image
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// correctly on its line.
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Label {
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property string rawText
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property int maxLineCount
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wrapMode: Text.Wrap
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textFormat: Text.StyledText
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truncationMode: TruncationMode.Elide
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// lineCount is unreliable for StyledText with images and line breaks
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readonly property int fontSize: font.pixelSize
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readonly property int actualLineHeight: (text === rawText) ? fontSize : (fontSize * 6 / 5)
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readonly property int actualLineCount: Math.floor(implicitHeight/actualLineHeight)
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Component.onCompleted: refitText()
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onFontSizeChanged: refitText()
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onWidthChanged: refitText()
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onRawTextChanged: refitText()
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onMaxLineCountChanged: refitText()
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function emojify(str) {
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return Emoji.emojify(str, fontSize)
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}
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function refitText() {
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text = emojify(rawText)
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if (maxLineCount > 0) {
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var divisor = 1
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var max = rawText.length
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var min = max
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while (actualLineCount > maxLineCount && divisor < rawText.length) {
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max = min
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divisor++
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min = rawText.length/divisor
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text = emojify(rawText.substr(0, min) + "…")
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}
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while (min < max) {
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var mid = Math.floor((min + max)/2)
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if (mid === min) {
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text = emojify(rawText.substr(0, min) + "…")
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break
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} else {
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text = emojify(rawText.substr(0, mid) + "…")
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if (actualLineCount > maxLineCount) {
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max = mid
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} else {
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min = mid
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}
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}
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}
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}
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}
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}
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