feat: support block selection (#594)

src/main/kotlin/app/termora/terminal/SelectionModel.kt

@@ -21,6 +21,16 @@ interface SelectionModel {
      */
     fun setSelection(startPosition: Position, endPosition: Position)
 
+    /**
+     * 设置块选中模式
+     */
+    fun setBlockSelection(block: Boolean)
+
+    /**
+     * 是否是块选中模式
+     */
+    fun isBlockSelection(): Boolean
+
     /**
      * 获取开始选中的位置
      */

src/main/kotlin/app/termora/terminal/SelectionModelImpl.kt

@@ -7,6 +7,7 @@ import kotlin.math.min
 open class SelectionModelImpl(private val terminal: Terminal) : SelectionModel {
     private var startPosition = Position.unknown
     private var endPosition = Position.unknown
+    private var block = false
     private val document = terminal.getDocument()
 
     internal companion object {
@@ -67,29 +68,60 @@ open class SelectionModelImpl(private val terminal: Terminal) : SelectionModel {
             return sb.toString()
         }
 
-        val iterator = getChars(getSelectionStartPosition(), getSelectionEndPosition())
-        while (iterator.hasNext()) {
-            val line = iterator.next()
-            val chars = line.chars()
-            if (chars.isEmpty() || chars.first().first.isNull) {
-                continue
-            }
+        val start = getSelectionStartPosition()
+        val end = getSelectionEndPosition()
 
-            for (e in chars) {
-                if (e.first.isSoftHyphen) {
-                    continue
-                } else if (e.first.isNull) {
-                    break
+        if (isBlockSelection()) {
+            val left = min(start.x, end.x)
+            val right = max(start.x, end.x)
+            val top = min(start.y, end.y)
+            val bottom = max(start.y, end.y)
+
+            for (lineNum in top..bottom) {
+                val line = document.getLine(lineNum)
+                val chars = line.chars()
+
+                // 块选中要处理超出边界
+                val from = (left - 1).coerceAtLeast(0)
+                val to = right.coerceAtMost(chars.size)
+
+                if (from < to) {
+                    val selected = chars.subList(from, to)
+                        .filter { !it.first.isNull && !it.first.isSoftHyphen }
+                        .joinToString("") { it.first.toString() }
+                    sb.append(selected)
+                }
+
+                if (lineNum != bottom) {
+                    sb.appendLine()
                 }
-                sb.append(e.first)
             }
 
-            if (line.wrapped) {
-                continue
-            }
+        } else {
+            val iterator = getChars(start, end)
+            while (iterator.hasNext()) {
+                val line = iterator.next()
+                val chars = line.chars()
+                if (chars.isEmpty() || chars.first().first.isNull) {
+                    continue
+                }
 
-            if (iterator.hasNext()) {
-                sb.appendLine()
+                for (e in chars) {
+                    if (e.first.isSoftHyphen) {
+                        continue
+                    } else if (e.first.isNull) {
+                        break
+                    }
+                    sb.append(e.first)
+                }
+
+                if (line.wrapped) {
+                    continue
+                }
+
+                if (iterator.hasNext()) {
+                    sb.appendLine()
+                }
             }
         }
 
@@ -171,6 +203,12 @@ open class SelectionModelImpl(private val terminal: Terminal) : SelectionModel {
         fireSelectionChanged()
     }
 
+    override fun setBlockSelection(block: Boolean) {
+        this.block = block
+    }
+
+    override fun isBlockSelection() = block
+
     override fun getSelectionStartPosition(): Position {
         return startPosition
     }
@@ -202,13 +240,20 @@ open class SelectionModelImpl(private val terminal: Terminal) : SelectionModel {
     }
 
     override fun hasSelection(x: Int, y: Int): Boolean {
-        return hasSelection() && isPointInsideArea(
-            startPosition,
-            endPosition,
-            x,
-            y,
-            terminal.getTerminalModel().getCols()
-        )
+
+        if (hasSelection().not()) return false
+
+        // 如果是块选中
+        if (isBlockSelection()) {
+            val left = min(startPosition.x, endPosition.x)
+            val right = max(startPosition.x, endPosition.x)
+            val top = min(startPosition.y, endPosition.y)
+            val bottom = max(startPosition.y, endPosition.y)
+
+            return x in left..right && y in top..bottom
+        }
+
+        return isPointInsideArea(startPosition, endPosition, x, y, terminal.getTerminalModel().getCols())
     }
 
 

src/main/kotlin/app/termora/terminal/panel/TerminalPanelMouseSelectionAdapter.kt

@@ -134,6 +134,8 @@ class TerminalPanelMouseSelectionAdapter(private val terminalPanel: TerminalPane
             // 如果不判断的话可能会导致移动了一点点就就进入选择状态了
             val diff = terminalPanel.getAverageCharWidth() / 5.0
             if (abs(mousePressedPoint.y - e.y) >= diff || abs(mousePressedPoint.x - e.x) >= diff) {
+                // 设置选中模式
+                terminal.getSelectionModel().setBlockSelection(isOnlyAltDown(e))
                 beginSelect(
                     Position(x = mousePressedPoint.x, y = mousePressedPoint.y),
                 )
@@ -141,6 +143,13 @@ class TerminalPanelMouseSelectionAdapter(private val terminalPanel: TerminalPane
         }
     }
 
+    private fun isOnlyAltDown(e: MouseEvent): Boolean {
+        return e.isAltDown &&
+                e.isMetaDown.not() &&
+                e.isControlDown.not() &&
+                e.isShiftDown.not() &&
+                e.isAltGraphDown.not()
+    }
 
     private fun beginSelect(position: Position) {