Merge branch 'master' into schema-view-En-Hua

1 files changed, 127 insertions, 0 deletions

diff --git a/src/client/views/InkHandles.tsx b/src/client/views/InkHandles.tsx
new file mode 100644
index 000000000..0b24c3c32
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+++ b/src/client/views/InkHandles.tsx
@@ -0,0 +1,127 @@
+import React = require("react");
+import { observable, action } from "mobx";
+import { observer } from "mobx-react";
+import { InkStrokeProperties } from "./InkStrokeProperties";
+import { setupMoveUpEvents, emptyFunction } from "../../Utils";
+import { UndoManager } from "../util/UndoManager";
+import { InkData, HandlePoint, HandleLine } from "../../fields/InkField";
+import { Transform } from "../util/Transform";
+import { Doc } from "../../fields/Doc";
+import { listSpec } from "../../fields/Schema";
+import { List } from "../../fields/List";
+import { Cast } from "../../fields/Types";
+import { Colors } from "./global/globalEnums";
+import { GestureOverlay } from "./GestureOverlay";
+
+export interface InkHandlesProps {
+    inkDoc: Doc;
+    data: InkData;
+    shape?: string;
+    format: number[];
+    ScreenToLocalTransform: () => Transform;
+}
+
+@observer
+export class InkHandles extends React.Component<InkHandlesProps> {
+    /**
+     * Handles the movement of a selected handle point when the user clicks and drags.
+     * @param handleNum The index of the currently selected handle point.
+     */
+    onHandleDown = (e: React.PointerEvent, handleIndex: number): void => {
+        if (InkStrokeProperties.Instance) {
+            InkStrokeProperties.Instance.moveControl(0, 0, 1);
+            const controlUndo = UndoManager.StartBatch("DocDecs set radius");
+            const screenScale = this.props.ScreenToLocalTransform().Scale;
+            const order = handleIndex % 4;
+            const oppositeHandleIndex = order === 1 ? handleIndex - 3 : handleIndex + 3;
+            const controlIndex = order === 1 ? handleIndex - 1 : handleIndex + 2;
+            document.addEventListener("keydown", (e: KeyboardEvent) => this.onBreakTangent(e, controlIndex), true);
+            setupMoveUpEvents(this, e, (e: PointerEvent, down: number[], delta: number[]) => {
+                InkStrokeProperties.Instance?.moveHandle(-delta[0] * screenScale, -delta[1] * screenScale, handleIndex, oppositeHandleIndex, controlIndex);
+                return false;
+            }, () => controlUndo?.end(), emptyFunction
+            );
+        }
+    }
+
+    /**
+     * Breaks tangent handle movement when ‘Alt’ key is held down. Adds the current handle index and 
+     * its matching (opposite) handle to a list of broken handle indices.
+     * @param handleNum The index of the currently selected handle point.
+     */
+    @action
+    onBreakTangent = (e: KeyboardEvent, controlIndex: number) => {
+        const doc: Doc = this.props.inkDoc;
+        if (["Alt"].includes(e.key)) {
+            e.stopPropagation();
+            if (doc) {
+                const brokenIndices = Cast(doc.brokenInkIndices, listSpec("number")) || new List;
+                if (brokenIndices && !brokenIndices.includes(controlIndex)) {
+                    brokenIndices.push(controlIndex);
+                }
+                doc.brokenInkIndices = brokenIndices;
+            }
+        }
+    }
+
+    render() {
+        const formatInstance = InkStrokeProperties.Instance;
+        if (!formatInstance) return (null);
+
+        // Accessing the current ink's data and extracting all handle points and handle lines.
+        const data = this.props.data;
+        const shape = this.props.shape;
+        const handlePoints: HandlePoint[] = [];
+        const handleLines: HandleLine[] = [];
+        if (data.length >= 4) {
+            for (let i = 0; i <= data.length - 4; i += 4) {
+                handlePoints.push({ X: data[i + 1].X, Y: data[i + 1].Y, I: i + 1, dot1: i, dot2: i === 0 ? i : i - 1 });
+                handlePoints.push({ X: data[i + 2].X, Y: data[i + 2].Y, I: i + 2, dot1: i + 3, dot2: i === data.length ? i + 3 : i + 4 });
+            }
+            // Adding first and last (single) handle lines.
+            handleLines.push({ X1: data[0].X, Y1: data[0].Y, X2: data[0].X, Y2: data[0].Y, X3: data[1].X, Y3: data[1].Y, dot1: 0, dot2: 0 });
+            handleLines.push({ X1: data[data.length - 2].X, Y1: data[data.length - 2].Y, X2: data[data.length - 1].X, Y2: data[data.length - 1].Y, X3: data[data.length - 1].X, Y3: data[data.length - 1].Y, dot1: data.length - 1, dot2: data.length - 1 });
+            for (let i = 2; i < data.length - 4; i += 4) {
+                handleLines.push({ X1: data[i].X, Y1: data[i].Y, X2: data[i + 1].X, Y2: data[i + 1].Y, X3: data[i + 3].X, Y3: data[i + 3].Y, dot1: i + 1, dot2: i + 2 });
+            }
+        }
+        const [left, top, scaleX, scaleY, strokeWidth] = this.props.format;
+
+        return (
+            <>
+                {handlePoints.map((pts, i) =>
+                    <svg height="10" width="10" key={`hdl${i}`}>
+                        <circle
+                            cx={(pts.X - left - strokeWidth / 2) * scaleX + strokeWidth / 2}
+                            cy={(pts.Y - top - strokeWidth / 2) * scaleY + strokeWidth / 2}
+                            r={strokeWidth / 2}
+                            strokeWidth={0}
+                            fill={Colors.MEDIUM_BLUE}
+                            onPointerDown={(e) => this.onHandleDown(e, pts.I)}
+                            pointerEvents="all"
+                            cursor="default"
+                            display={(pts.dot1 === formatInstance._currentPoint || pts.dot2 === formatInstance._currentPoint) ? "inherit" : "none"} />
+                    </svg>)}
+                {handleLines.map((pts, i) =>
+                    <svg height="100" width="100" key={`line${i}`}>
+                        <line
+                            x1={(pts.X1 - left - strokeWidth / 2) * scaleX + strokeWidth / 2}
+                            y1={(pts.Y1 - top - strokeWidth / 2) * scaleY + strokeWidth / 2}
+                            x2={(pts.X2 - left - strokeWidth / 2) * scaleX + strokeWidth / 2}
+                            y2={(pts.Y2 - top - strokeWidth / 2) * scaleY + strokeWidth / 2}
+                            stroke={Colors.MEDIUM_BLUE}
+                            strokeWidth={strokeWidth / 4}
+                            display={(pts.dot1 === formatInstance._currentPoint || pts.dot2 === formatInstance._currentPoint) ? "inherit" : "none"} />
+                        <line
+                            x1={(pts.X2 - left - strokeWidth / 2) * scaleX + strokeWidth / 2}
+                            y1={(pts.Y2 - top - strokeWidth / 2) * scaleY + strokeWidth / 2}
+                            x2={(pts.X3 - left - strokeWidth / 2) * scaleX + strokeWidth / 2}
+                            y2={(pts.Y3 - top - strokeWidth / 2) * scaleY + strokeWidth / 2}
+                            stroke={Colors.MEDIUM_BLUE}
+                            strokeWidth={strokeWidth / 4}
+                            display={(pts.dot1 === formatInstance._currentPoint || pts.dot2 === formatInstance._currentPoint) ? "inherit" : "none"} />
+                    </svg>)}
+            </>
+        );
+    }
+}
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