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Updated
OverviewActivity. and added ReadMorePlugin
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app/src/main/java/org/openobservatory/ooniprobe/common/ReadMorePlugin.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,144 @@ | ||
| package org.openobservatory.ooniprobe.common | ||
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| import android.text.SpannableStringBuilder | ||
| import android.text.Spanned | ||
| import android.text.style.ClickableSpan | ||
| import android.text.style.ReplacementSpan | ||
| import android.view.View | ||
| import android.widget.TextView | ||
| import io.noties.markwon.AbstractMarkwonPlugin | ||
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| /** | ||
| * Read more plugin based on text length. | ||
| * @see <a href="https://github.com/noties/Markwon/blob/v4.6.2/app-sample/src/main/java/io/noties/markwon/app/samples/ReadMorePluginSample.java#L208C2-L208C2">ReadMorePluginSample</a> | ||
| */ | ||
| class ReadMorePlugin : AbstractMarkwonPlugin() { | ||
| private val maxLength = 150 | ||
| private val labelMore = "\n\nRead more >" | ||
| private val labelLess = "\n\nRead less >" | ||
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| override fun afterSetText(textView: TextView) { | ||
| val text = textView.text | ||
| if (text.length < maxLength) { | ||
| // everything is OK, no need to ellipsize) | ||
| return | ||
| } | ||
| val breakAt = breakTextAt(text, 0, maxLength) | ||
| val cs = createCollapsedString(text, 0, breakAt) | ||
| textView.text = cs | ||
| } | ||
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| private fun createCollapsedString(text: CharSequence, start: Int, end: Int): CharSequence { | ||
| val builder = SpannableStringBuilder(text, start, end) | ||
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| // NB! each table row is represented as a space character and new-line (so length=2) no | ||
| // matter how many characters are inside table cells | ||
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| // we can _clean_ this builder, for example remove all dynamic content (like images and tables, | ||
| // but keep them in full/expanded version) | ||
| if (true) { | ||
| // it is an implementation detail but _mostly_ dynamic content is implemented as | ||
| // ReplacementSpans | ||
| val spans = builder.getSpans( | ||
| 0, builder.length, | ||
| ReplacementSpan::class.java | ||
| ) | ||
| if (spans != null) { | ||
| for (span in spans) { | ||
| builder.removeSpan(span) | ||
| } | ||
| } | ||
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| // NB! if there will be a table in _preview_ (collapsed) then each row will be represented as a | ||
| // space and new-line | ||
| trim(builder) | ||
| } | ||
| val fullText = createFullText(text, builder) | ||
| builder.append(" ...") | ||
| val length = builder.length | ||
| builder.append(labelMore) | ||
| builder.setSpan(object : ClickableSpan() { | ||
| override fun onClick(widget: View) { | ||
| (widget as TextView).text = fullText | ||
| } | ||
| }, length, builder.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE) | ||
| return builder | ||
| } | ||
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| private fun createFullText(text: CharSequence, collapsedText: CharSequence): CharSequence { | ||
| // full/expanded text can also be different, | ||
| // for example it can be kept as-is and have no `collapse` functionality (once expanded cannot collapse) | ||
| // or can contain collapse feature | ||
| val fullText: CharSequence | ||
| if (true) { | ||
| // for example, let's allow collapsing | ||
| val builder = SpannableStringBuilder(text) | ||
| builder.append(' ') | ||
| val length = builder.length | ||
| builder.append(labelLess) | ||
| builder.setSpan(object : ClickableSpan() { | ||
| override fun onClick(widget: View) { | ||
| (widget as TextView).text = collapsedText | ||
| } | ||
| }, length, builder.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE) | ||
| fullText = builder | ||
| } else { | ||
| fullText = text | ||
| } | ||
| return fullText | ||
| } | ||
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| companion object { | ||
| private fun trim(builder: SpannableStringBuilder) { | ||
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| // NB! tables use `\u00a0` (non breaking space) which is not reported as white-space | ||
| var c: Char | ||
| run { | ||
| var i = 0 | ||
| val length = builder.length | ||
| while (i < length) { | ||
| c = builder[i] | ||
| if (!Character.isWhitespace(c) && c != '\u00a0') { | ||
| if (i > 0) { | ||
| builder.replace(0, i, "") | ||
| } | ||
| break | ||
| } | ||
| i++ | ||
| } | ||
| } | ||
| for (i in builder.length - 1 downTo 0) { | ||
| c = builder[i] | ||
| if (!Character.isWhitespace(c) && c != '\u00a0') { | ||
| if (i < builder.length - 1) { | ||
| builder.replace(i, builder.length, "") | ||
| } | ||
| break | ||
| } | ||
| } | ||
| } | ||
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| // depending on your locale these can be different | ||
| // There is a BreakIterator in Android, but it is not reliable, still theoretically | ||
| // it should work better than hand-written and hardcoded rules | ||
| private fun breakTextAt(text: CharSequence, start: Int, max: Int): Int { | ||
| var last = start | ||
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| // no need to check for _start_ (anyway will be ignored) | ||
| for (i in start + max - 1 downTo start + 1) { | ||
| val c = text[i] | ||
| if (Character.isWhitespace(c) || c == '.' || c == ',' || c == '!' || c == '?') { | ||
| // include this special character | ||
| last = i - 1 | ||
| break | ||
| } | ||
| } | ||
| return if (last <= start) { | ||
| // when used in subSequence last index is exclusive, | ||
| // so given max=150 would result in 0-149 subSequence | ||
| start + max | ||
| } else last | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,6 @@ | ||
| #Wed Oct 25 19:25:06 WAT 2023 | ||
| distributionBase=GRADLE_USER_HOME | ||
| distributionPath=wrapper/dists | ||
| distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-all.zip | ||
| distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-bin.zip | ||
| zipStoreBase=GRADLE_USER_HOME | ||
| zipStorePath=wrapper/dists |