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Formatting based on external formatter (#80)
Co-authored-by: Johannes Spangenberg <[email protected]>
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@@ -23,3 +23,5 @@ hs_err_pid* | |
| *.iml | ||
| **/.gradle | ||
| build | ||
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| src/gen | ||
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112 changes: 112 additions & 0 deletions
112
src/main/java/org/nixos/idea/format/NixExternalFormatter.java
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| package org.nixos.idea.format; | ||
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| import com.intellij.execution.ExecutionException; | ||
| import com.intellij.execution.configurations.GeneralCommandLine; | ||
| import com.intellij.execution.process.CapturingProcessAdapter; | ||
| import com.intellij.execution.process.OSProcessHandler; | ||
| import com.intellij.execution.process.ProcessEvent; | ||
| import com.intellij.formatting.service.AsyncDocumentFormattingService; | ||
| import com.intellij.formatting.service.AsyncFormattingRequest; | ||
| import com.intellij.openapi.util.NlsSafe; | ||
| import com.intellij.psi.PsiFile; | ||
| import com.intellij.util.execution.ParametersListUtil; | ||
| import org.jetbrains.annotations.NonNls; | ||
| import org.jetbrains.annotations.NotNull; | ||
| import org.jetbrains.annotations.Nullable; | ||
| import org.nixos.idea.file.NixFile; | ||
| import org.nixos.idea.lang.NixLanguage; | ||
| import org.nixos.idea.settings.NixExternalFormatterSettings; | ||
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| import java.io.IOException; | ||
| import java.io.OutputStream; | ||
| import java.nio.charset.StandardCharsets; | ||
| import java.nio.file.Files; | ||
| import java.util.EnumSet; | ||
| import java.util.List; | ||
| import java.util.Set; | ||
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| public final class NixExternalFormatter extends AsyncDocumentFormattingService { | ||
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| @Override | ||
| protected @NotNull String getNotificationGroupId() { | ||
| return NixLanguage.NOTIFICATION_GROUP_ID; | ||
| } | ||
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| @Override | ||
| protected @NotNull @NlsSafe String getName() { | ||
| return "NixIDEA"; | ||
| } | ||
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| @Override | ||
| public @NotNull Set<Feature> getFeatures() { | ||
| return EnumSet.noneOf(Feature.class); | ||
| } | ||
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| @Override | ||
| public boolean canFormat(@NotNull PsiFile psiFile) { | ||
| return psiFile instanceof NixFile; | ||
| } | ||
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| @Override | ||
| protected @Nullable FormattingTask createFormattingTask(@NotNull AsyncFormattingRequest request) { | ||
| NixExternalFormatterSettings nixSettings = NixExternalFormatterSettings.getInstance(); | ||
| if (!nixSettings.isFormatEnabled()) { | ||
| return null; | ||
| } | ||
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| var ioFile = request.getIOFile(); | ||
| if (ioFile == null) return null; | ||
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| @NonNls | ||
| var command = nixSettings.getFormatCommand(); | ||
| List<String> argv = ParametersListUtil.parse(command, false, true); | ||
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| var commandLine = new GeneralCommandLine(argv); | ||
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| try { | ||
| var handler = new OSProcessHandler(commandLine.withCharset(StandardCharsets.UTF_8)); | ||
| OutputStream processInput = handler.getProcessInput(); | ||
| return new FormattingTask() { | ||
| @Override | ||
| public void run() { | ||
| handler.addProcessListener(new CapturingProcessAdapter() { | ||
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| @Override | ||
| public void processTerminated(@NotNull ProcessEvent event) { | ||
| int exitCode = event.getExitCode(); | ||
| if (exitCode == 0) { | ||
| request.onTextReady(getOutput().getStdout()); | ||
| } else { | ||
| request.onError("NixIDEA", getOutput().getStderr()); | ||
| } | ||
| } | ||
| }); | ||
| handler.startNotify(); | ||
| try { | ||
| Files.copy(ioFile.toPath(), processInput); | ||
| processInput.flush(); | ||
| processInput.close(); | ||
| } catch (IOException e) { | ||
| handler.destroyProcess(); | ||
| request.onError("NixIDEA", e.getMessage()); | ||
| } | ||
| } | ||
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| @Override | ||
| public boolean cancel() { | ||
| handler.destroyProcess(); | ||
| return true; | ||
| } | ||
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| @Override | ||
| public boolean isRunUnderProgress() { | ||
| return true; | ||
| } | ||
| }; | ||
| } catch (ExecutionException e) { | ||
| request.onError("NixIDEA", e.getMessage()); | ||
| return null; | ||
| } | ||
| } | ||
| } |
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76 changes: 76 additions & 0 deletions
76
src/main/java/org/nixos/idea/settings/NixExternalFormatterSettings.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,76 @@ | ||
| package org.nixos.idea.settings; | ||
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| import com.intellij.openapi.application.ApplicationManager; | ||
| import com.intellij.openapi.components.PersistentStateComponent; | ||
| import com.intellij.openapi.components.RoamingType; | ||
| import com.intellij.openapi.components.State; | ||
| import com.intellij.openapi.components.Storage; | ||
| import org.jetbrains.annotations.NotNull; | ||
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| import java.util.ArrayDeque; | ||
| import java.util.Collection; | ||
| import java.util.Collections; | ||
| import java.util.Deque; | ||
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| @State(name = "NixExternalFormatterSettings", storages = @Storage(value = NixStoragePaths.TOOLS, roamingType = RoamingType.DISABLED)) | ||
| public final class NixExternalFormatterSettings implements PersistentStateComponent<NixExternalFormatterSettings.State> { | ||
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| // Documentation: | ||
| // https://plugins.jetbrains.com/docs/intellij/persisting-state-of-components.html | ||
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| private static final int MAX_HISTORY_SIZE = 5; | ||
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| private @NotNull State myState = new State(); | ||
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| public static @NotNull NixExternalFormatterSettings getInstance() { | ||
| return ApplicationManager.getApplication().getService(NixExternalFormatterSettings.class); | ||
| } | ||
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| public boolean isFormatEnabled() { | ||
| return myState.enabled; | ||
| } | ||
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| public void setFormatEnabled(boolean enabled) { | ||
| myState.enabled = enabled; | ||
| } | ||
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| public @NotNull String getFormatCommand() { | ||
| return myState.command; | ||
| } | ||
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| public void setFormatCommand(@NotNull String command) { | ||
| myState.command = command; | ||
| addFormatCommandToHistory(command); | ||
| } | ||
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| public @NotNull Collection<String> getCommandHistory() { | ||
| return Collections.unmodifiableCollection(myState.history); | ||
| } | ||
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| private void addFormatCommandToHistory(@NotNull String command) { | ||
| Deque<String> history = myState.history; | ||
| history.remove(command); | ||
| history.addFirst(command); | ||
| while (history.size() > MAX_HISTORY_SIZE) { | ||
| history.removeLast(); | ||
| } | ||
| } | ||
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| @SuppressWarnings("ClassEscapesDefinedScope") | ||
| @Override | ||
| public void loadState(@NotNull State state) { | ||
| myState = state; | ||
| } | ||
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| @SuppressWarnings("ClassEscapesDefinedScope") | ||
| @Override | ||
| public @NotNull State getState() { | ||
| return myState; | ||
| } | ||
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| static final class State { | ||
| public boolean enabled = false; | ||
| public @NotNull String command = ""; | ||
| public Deque<String> history = new ArrayDeque<>(); | ||
| } | ||
| } |
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