xterm

[VSoRC/.git] / node_modules / xterm / src / browser / input / Mouse.ts

diff --git a/node_modules/xterm/src/browser/input/Mouse.ts b/node_modules/xterm/src/browser/input/Mouse.ts
new file mode 100644 (file)
index 0000000..2986fb3
--- /dev/null
+++ b/node_modules/xterm/src/browser/input/Mouse.ts
@@ -0,0 +1,58 @@
+/**
+ * Copyright (c) 2017 The xterm.js authors. All rights reserved.
+ * @license MIT
+ */
+
+export function getCoordsRelativeToElement(event: {clientX: number, clientY: number}, element: HTMLElement): [number, number] {
+  const rect = element.getBoundingClientRect();
+  return [event.clientX - rect.left, event.clientY - rect.top];
+}
+
+/**
+ * Gets coordinates within the terminal for a particular mouse event. The result
+ * is returned as an array in the form [x, y] instead of an object as it's a
+ * little faster and this function is used in some low level code.
+ * @param event The mouse event.
+ * @param element The terminal's container element.
+ * @param colCount The number of columns in the terminal.
+ * @param rowCount The number of rows n the terminal.
+ * @param isSelection Whether the request is for the selection or not. This will
+ * apply an offset to the x value such that the left half of the cell will
+ * select that cell and the right half will select the next cell.
+ */
+export function getCoords(event: {clientX: number, clientY: number}, element: HTMLElement, colCount: number, rowCount: number, hasValidCharSize: boolean, actualCellWidth: number, actualCellHeight: number, isSelection?: boolean): [number, number] | undefined {
+  // Coordinates cannot be measured if there are no valid
+  if (!hasValidCharSize) {
+    return undefined;
+  }
+
+  const coords = getCoordsRelativeToElement(event, element);
+  if (!coords) {
+    return undefined;
+  }
+
+  coords[0] = Math.ceil((coords[0] + (isSelection ? actualCellWidth / 2 : 0)) / actualCellWidth);
+  coords[1] = Math.ceil(coords[1] / actualCellHeight);
+
+  // Ensure coordinates are within the terminal viewport. Note that selections
+  // need an addition point of precision to cover the end point (as characters
+  // cover half of one char and half of the next).
+  coords[0] = Math.min(Math.max(coords[0], 1), colCount + (isSelection ? 1 : 0));
+  coords[1] = Math.min(Math.max(coords[1], 1), rowCount);
+
+  return coords;
+}
+
+/**
+ * Gets coordinates within the terminal for a particular mouse event, wrapping
+ * them to the bounds of the terminal and adding 32 to both the x and y values
+ * as expected by xterm.
+ */
+export function getRawByteCoords(coords: [number, number] | undefined): { x: number, y: number } | undefined {
+  if (!coords) {
+    return undefined;
+  }
+
+  // xterm sends raw bytes and starts at 32 (SP) for each.
+  return { x: coords[0] + 32, y: coords[1] + 32 };
+}