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| 1 | +package ee.carlrobert.codegpt.ui.dnd |
| 2 | + |
| 3 | +import com.intellij.openapi.application.ApplicationManager |
| 4 | +import com.intellij.openapi.vfs.LocalFileSystem |
| 5 | +import com.intellij.openapi.vfs.VirtualFile |
| 6 | +import com.intellij.util.ui.JBUI |
| 7 | +import ee.carlrobert.codegpt.ui.textarea.UserInputPanel |
| 8 | +import java.awt.GraphicsEnvironment |
| 9 | +import java.awt.datatransfer.DataFlavor |
| 10 | +import java.awt.dnd.* |
| 11 | +import java.io.File |
| 12 | +import java.net.URI |
| 13 | +import java.net.URLDecoder |
| 14 | +import java.nio.charset.StandardCharsets |
| 15 | +import javax.swing.JComponent |
| 16 | + |
| 17 | +object FileDragAndDrop { |
| 18 | + fun install(component: JComponent, onFilesDropped: (List<VirtualFile>) -> Unit) { |
| 19 | + install(component, component, onFilesDropped) |
| 20 | + } |
| 21 | + |
| 22 | + fun install( |
| 23 | + component: JComponent, |
| 24 | + highlightTarget: JComponent, |
| 25 | + onFilesDropped: (List<VirtualFile>) -> Unit |
| 26 | + ) { |
| 27 | + val appHeadless = try { |
| 28 | + ApplicationManager.getApplication()?.isHeadlessEnvironment == true |
| 29 | + } catch (_: Throwable) { |
| 30 | + false |
| 31 | + } |
| 32 | + if (GraphicsEnvironment.isHeadless() || appHeadless) return |
| 33 | + DropTarget(component, DnDConstants.ACTION_COPY, object : DropTargetAdapter() { |
| 34 | + override fun dragEnter(dragEvent: DropTargetDragEvent) { |
| 35 | + if (canImport(dragEvent.currentDataFlavors)) { |
| 36 | + dragEvent.acceptDrag(DnDConstants.ACTION_COPY) |
| 37 | + setHighlight(highlightTarget, true) |
| 38 | + } else dragEvent.rejectDrag() |
| 39 | + } |
| 40 | + |
| 41 | + override fun drop(dropEvent: DropTargetDropEvent) { |
| 42 | + val files = extractVirtualFiles(dropEvent.transferable) |
| 43 | + if (files.isNotEmpty()) { |
| 44 | + dropEvent.acceptDrop(DnDConstants.ACTION_COPY) |
| 45 | + onFilesDropped(files) |
| 46 | + dropEvent.dropComplete(true) |
| 47 | + } else dropEvent.rejectDrop() |
| 48 | + setHighlight(highlightTarget, false) |
| 49 | + } |
| 50 | + |
| 51 | + override fun dragExit(dte: DropTargetEvent) { |
| 52 | + setHighlight(highlightTarget, false) |
| 53 | + } |
| 54 | + }, true) |
| 55 | + } |
| 56 | + |
| 57 | + private fun canImport(flavors: Array<DataFlavor>): Boolean { |
| 58 | + return flavors.any { |
| 59 | + it == DataFlavor.javaFileListFlavor |
| 60 | + || it == DataFlavor.stringFlavor |
| 61 | + || isUriListFlavor(it) |
| 62 | + } |
| 63 | + } |
| 64 | + |
| 65 | + private fun isUriListFlavor(flavor: DataFlavor): Boolean { |
| 66 | + return flavor.primaryType.equals("text", true) && flavor.subType.equals("uri-list", true) |
| 67 | + } |
| 68 | + |
| 69 | + private fun extractVirtualFiles(transferable: java.awt.datatransfer.Transferable): List<VirtualFile> { |
| 70 | + val out = mutableListOf<VirtualFile>() |
| 71 | + try { |
| 72 | + if (transferable.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) { |
| 73 | + val list = transferable.getTransferData(DataFlavor.javaFileListFlavor) as? List<*> |
| 74 | + list?.mapNotNull { it as? File }?.forEach { addIfExists(out, it) } |
| 75 | + } |
| 76 | + } catch (_: Exception) { |
| 77 | + } |
| 78 | + try { |
| 79 | + if (transferable.isDataFlavorSupported(DataFlavor.stringFlavor)) { |
| 80 | + val s = transferable.getTransferData(DataFlavor.stringFlavor) as? String |
| 81 | + if (!s.isNullOrBlank()) parseUriList(s).forEach { addIfExists(out, it) } |
| 82 | + } |
| 83 | + } catch (_: Exception) { |
| 84 | + } |
| 85 | + return out.distinct() |
| 86 | + } |
| 87 | + |
| 88 | + private fun parseUriList(data: String): List<File> { |
| 89 | + return data.lineSequence() |
| 90 | + .map { it.trim() } |
| 91 | + .filter { it.isNotEmpty() && !it.startsWith("#") } |
| 92 | + .mapNotNull { |
| 93 | + try { |
| 94 | + if (it.startsWith("file:")) File( |
| 95 | + URLDecoder.decode( |
| 96 | + URI.create(it).path, |
| 97 | + StandardCharsets.UTF_8 |
| 98 | + ) |
| 99 | + ) else File(it) |
| 100 | + } catch (_: Exception) { |
| 101 | + null |
| 102 | + } |
| 103 | + } |
| 104 | + .toList() |
| 105 | + } |
| 106 | + |
| 107 | + private fun addIfExists(out: MutableList<VirtualFile>, file: File) { |
| 108 | + LocalFileSystem.getInstance().refreshAndFindFileByIoFile(file)?.let { out += it } |
| 109 | + } |
| 110 | + |
| 111 | + private fun setHighlight(component: JComponent, enabled: Boolean) { |
| 112 | + if (component is UserInputPanel) { |
| 113 | + component.setDragActive(enabled) |
| 114 | + return |
| 115 | + } |
| 116 | + val key = "codegpt.dnd.prev.border" |
| 117 | + if (enabled) { |
| 118 | + if (component.getClientProperty(key) == null) component.putClientProperty( |
| 119 | + key, |
| 120 | + component.border |
| 121 | + ) |
| 122 | + val focusColor = JBUI.CurrentTheme.Focus.defaultButtonColor() |
| 123 | + val overlay = JBUI.Borders.customLine(focusColor, 1) |
| 124 | + val base = component.getClientProperty(key) as? javax.swing.border.Border |
| 125 | + component.border = JBUI.Borders.merge(base, overlay, true) |
| 126 | + } else { |
| 127 | + val prev = component.getClientProperty(key) as? javax.swing.border.Border |
| 128 | + if (prev != null) { |
| 129 | + component.border = prev |
| 130 | + component.putClientProperty(key, null) |
| 131 | + } |
| 132 | + } |
| 133 | + component.revalidate() |
| 134 | + component.repaint() |
| 135 | + } |
| 136 | +} |
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