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117 changes: 117 additions & 0 deletions
117
src/nl/hannahsten/texifyidea/completion/LatexExternalCommandsIndexCache.kt
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,117 @@ | ||
| package nl.hannahsten.texifyidea.completion | ||
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| import arrow.atomic.AtomicBoolean | ||
| import com.intellij.codeInsight.lookup.LookupElementBuilder | ||
| import com.intellij.openapi.application.runReadAction | ||
| import com.intellij.openapi.progress.ProgressIndicator | ||
| import com.intellij.openapi.progress.ProgressManager | ||
| import com.intellij.openapi.progress.Task.Backgroundable | ||
| import com.intellij.openapi.project.Project | ||
| import com.intellij.psi.search.GlobalSearchScope | ||
| import com.intellij.util.indexing.FileBasedIndex | ||
| import kotlinx.coroutines.CoroutineScope | ||
| import kotlinx.coroutines.Dispatchers | ||
| import kotlinx.coroutines.cancel | ||
| import kotlinx.coroutines.launch | ||
| import nl.hannahsten.texifyidea.completion.LatexCommandsAndEnvironmentsCompletionProvider.Companion.createCommandLookupElements | ||
| import nl.hannahsten.texifyidea.index.file.LatexExternalCommandIndex | ||
| import nl.hannahsten.texifyidea.lang.LatexPackage | ||
| import nl.hannahsten.texifyidea.lang.commands.LatexCommand | ||
|
|
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| /** | ||
| * Cache for [LatexExternalCommandIndex], as index access is very expensive. | ||
| * This cache will not be updated while the IDE is running. | ||
| */ | ||
| object LatexExternalCommandsIndexCache { | ||
| private val scope = CoroutineScope(Dispatchers.Default) | ||
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|
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| private val isCacheFillInProgress = AtomicBoolean(false) | ||
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| var completionElements = setOf<LookupElementBuilder>() | ||
|
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| fun unload() { | ||
| scope.cancel() | ||
| } | ||
|
|
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| /** | ||
| * Initiate a cache fill but do not wait for it to be filled. | ||
| */ | ||
| fun fillCacheAsync(project: Project, packagesInProject: List<LatexPackage>) { | ||
| if (isCacheFillInProgress.compareAndSet(expected = true, new = true)) { | ||
| return | ||
| } | ||
| isCacheFillInProgress.getAndSet(true) | ||
|
|
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| scope.launch { | ||
| ProgressManager.getInstance().run(object : Backgroundable(project, "Retrieving LaTeX commands...") { | ||
| override fun run(indicator: ProgressIndicator) { | ||
| try { | ||
| val commandsFromIndex = getIndexedCommandsNoCache(project, indicator) | ||
| completionElements = createLookupElements(commandsFromIndex, packagesInProject, indicator) | ||
| } | ||
| finally { | ||
| isCacheFillInProgress.getAndSet(false) | ||
| } | ||
| } | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| /** | ||
| * This may be a very expensive operation, up to one minute for texlive-full | ||
| */ | ||
| private fun getIndexedCommandsNoCache(project: Project, indicator: ProgressIndicator): MutableList<Set<LatexCommand>> { | ||
| indicator.text = "Getting commands from index..." | ||
| val commands = mutableListOf<String>() | ||
| runReadAction { | ||
| FileBasedIndex.getInstance().processAllKeys( | ||
| LatexExternalCommandIndex.Cache.id, | ||
| { cmdWithSlash -> commands.add(cmdWithSlash) }, | ||
| GlobalSearchScope.everythingScope(project), | ||
| null | ||
| ) | ||
| } | ||
|
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| indicator.text = "Processing indexed commands..." | ||
| val commandsFromIndex = mutableListOf<Set<LatexCommand>>() | ||
| for ((index, cmdWithSlash) in commands.withIndex()) { | ||
| indicator.checkCanceled() | ||
| indicator.fraction = index.toDouble() / commands.size | ||
| commandsFromIndex.add(LatexCommand.lookupInIndex(cmdWithSlash.substring(1), project)) | ||
| } | ||
|
|
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| return commandsFromIndex | ||
| } | ||
|
|
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| private fun createLookupElements( | ||
| commandsFromIndex: MutableList<Set<LatexCommand>>, | ||
| packagesInProject: List<LatexPackage>, | ||
| indicator: ProgressIndicator | ||
| ): MutableSet<LookupElementBuilder> { | ||
| indicator.text = "Adding commands to autocompletion..." | ||
| val lookupElementBuilders = mutableSetOf<LookupElementBuilder>() | ||
|
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| // Process each set of command aliases (commands with the same name, but possibly with different arguments) separately. | ||
| commandsFromIndex.mapIndexed { index, commandAliases -> | ||
| indicator.fraction = index.toDouble() / commandsFromIndex.size | ||
| indicator.checkCanceled() | ||
| commandAliases.filter { command -> if (LatexCommandsAndEnvironmentsCompletionProvider.isTexliveAvailable) command.dependency in packagesInProject else true } | ||
| .forEach { cmd -> | ||
| createCommandLookupElements(cmd) | ||
| // Avoid duplicates of commands defined in LaTeX base, because they are often very similar commands defined in different document classes, so it makes not | ||
| // much sense at the moment to have them separately in the autocompletion. | ||
| // Effectively this results in just taking the first one we found | ||
| .filter { newBuilder -> | ||
| if (cmd.dependency.isDefault) { | ||
| lookupElementBuilders.none { it.lookupString == newBuilder.lookupString } | ||
| } | ||
| else { | ||
| true | ||
| } | ||
| }.forEach { lookupElementBuilders.add(it) } | ||
| } | ||
| } | ||
|
|
||
| return lookupElementBuilders | ||
| } | ||
| } |
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