63 lines
2.6 KiB
Kotlin
63 lines
2.6 KiB
Kotlin
/* Copyright 2020 Tusky Contributors
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*
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* This file is a part of Tusky.
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* 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 along with Tusky; if not,
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* see <http://www.gnu.org/licenses>. */
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package com.keylesspalace.tusky.json
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import android.text.Spanned
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import android.text.SpannedString
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import androidx.core.text.HtmlCompat
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import androidx.core.text.parseAsHtml
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import androidx.core.text.toHtml
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import com.google.gson.JsonDeserializationContext
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import com.google.gson.JsonDeserializer
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import com.google.gson.JsonElement
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import com.google.gson.JsonParseException
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import com.google.gson.JsonPrimitive
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import com.google.gson.JsonSerializationContext
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import com.google.gson.JsonSerializer
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import com.keylesspalace.tusky.util.trimTrailingWhitespace
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import org.jsoup.Jsoup
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import java.lang.reflect.Type
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class SpannedTypeAdapter : JsonDeserializer<Spanned>, JsonSerializer<Spanned?> {
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@Throws(JsonParseException::class)
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override fun deserialize(json: JsonElement, typeOfT: Type, context: JsonDeserializationContext): Spanned {
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return json.asString
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/* Mastodon uses 'white-space: pre-wrap;' so spaces are displayed as returned by the Api.
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* We can't use CSS so we replace spaces with non-breaking-spaces to emulate the behavior.
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*/
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?.replace("<br> ", "<br> ")
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?.replace("<br /> ", "<br /> ")
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?.replace("<br/> ", "<br/> ")
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?.replace(" ", " ")
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?.let { html ->
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Jsoup.parse(html)
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.apply {
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select(".quote-inline").forEach { it.remove() }
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}
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.html()
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}
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?.parseAsHtml()
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/* Html.fromHtml returns trailing whitespace if the html ends in a </p> tag, which
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* most status contents do, so it should be trimmed. */
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?.trimTrailingWhitespace()
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?: SpannedString("")
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}
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override fun serialize(src: Spanned?, typeOfSrc: Type, context: JsonSerializationContext): JsonElement {
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return JsonPrimitive(src!!.toHtml(HtmlCompat.TO_HTML_PARAGRAPH_LINES_INDIVIDUAL))
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}
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}
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