From 4bf54cdb7d2568f718446ddf6b7f17ba6a54ba91 Mon Sep 17 00:00:00 2001
From: bobzel <zzzman@gmail.com>
Date: Sun, 5 Jun 2022 10:56:03 -0400
Subject: fixed up drawing link lines to be less jittery and smoother looking. 
 changed documentView to use a margin: auto when fitting width for something
 that can't grow to the size of the panel so that it will be centered in the
 panel and not docked at the top.

---
 .../CollectionFreeFormLinkView.tsx                 | 57 +++++-----------------
 1 file changed, 11 insertions(+), 46 deletions(-)

(limited to 'src/client/views/collections/collectionFreeForm/CollectionFreeFormLinkView.tsx')

diff --git a/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinkView.tsx b/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinkView.tsx
index fe849ee48..5f890c810 100644
--- a/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinkView.tsx
+++ b/src/client/views/collections/collectionFreeForm/CollectionFreeFormLinkView.tsx
@@ -52,14 +52,10 @@ export class CollectionFreeFormLinkView extends React.Component<CollectionFreeFo
         if (SnappingManager.GetIsDragging() || !A.ContentDiv || !B.ContentDiv) return;
         setTimeout(action(() => this._opacity = 0.75), 0); // since the render code depends on querying the Dom through getBoudndingClientRect, we need to delay triggering render()
         setTimeout(action(() => (!LinkDocs.length || !linkDoc.linkDisplay) && (this._opacity = 0.05)), 750); // this will unhighlight the link line.
-        const acont = A.ContentDiv.getElementsByClassName("linkAnchorBox-cont");
-        const bcont = B.ContentDiv.getElementsByClassName("linkAnchorBox-cont");
-        const adiv = acont.length ? acont[0] : A.ContentDiv;
-        const bdiv = bcont.length ? bcont[0] : B.ContentDiv;
-        const a = adiv.getBoundingClientRect();
-        const b = bdiv.getBoundingClientRect();
-        const { left: aleft, top: atop, width: awidth, height: aheight } = adiv.parentElement!.getBoundingClientRect();
-        const { left: bleft, top: btop, width: bwidth, height: bheight } = bdiv.parentElement!.getBoundingClientRect();
+        const a = A.ContentDiv.getBoundingClientRect();
+        const b = B.ContentDiv.getBoundingClientRect();
+        const { left: aleft, top: atop, width: awidth, height: aheight } = A.ContentDiv.parentElement!.getBoundingClientRect();
+        const { left: bleft, top: btop, width: bwidth, height: bheight } = B.ContentDiv.parentElement!.getBoundingClientRect();
         const apt = Utils.closestPtBetweenRectangles(aleft, atop, awidth, aheight, bleft, btop, bwidth, bheight, a.left + a.width / 2, a.top + a.height / 2);
         const bpt = Utils.closestPtBetweenRectangles(bleft, btop, bwidth, bheight, aleft, atop, awidth, aheight, apt.point.x, apt.point.y);
 
@@ -97,6 +93,8 @@ export class CollectionFreeFormLinkView extends React.Component<CollectionFreeFo
             const mpy = mp[1] / B.props.PanelHeight();
             if (mpx >= 0 && mpx <= 1) linkDoc.anchor2_x = mpx * 100;
             if (mpy >= 0 && mpy <= 1) linkDoc.anchor2_y = mpy * 100;
+            if (getComputedStyle(targetBhyperlink).fontSize === "0px") linkDoc.opacity = 0;
+            else linkDoc.opacity = 1;
         }
     }
 
@@ -163,25 +161,6 @@ export class CollectionFreeFormLinkView extends React.Component<CollectionFreeFo
         this.toggleProperties();
     }
 
-    // componentToHex = (c: number) => {
-    //     let hex = c.toString(16);
-    //     return hex.length == 1 ? "0" + hex : hex;
-    // }
-
-    // rgbToHex = (rgbString: string) => {
-    //     if (rgbString != "black") {
-    //         const splitString = rgbString.split(/rgb|\(|\)|,| /)
-    //         let values: number[] = []
-    //         splitString.forEach(elt => {
-    //             if (elt) {
-    //                 values.push(parseInt(elt))
-    //             }
-    //         })
-    //         return "#" + this.componentToHex(values[0]) + this.componentToHex(values[1]) + this.componentToHex(values[2]);
-    //     }
-    //     return "#000000"
-    // }
-
     @computed.struct get renderData() {
         this._start; SnappingManager.GetIsDragging();
         const { A, B, LinkDocs } = this.props;
@@ -199,32 +178,18 @@ export class CollectionFreeFormLinkView extends React.Component<CollectionFreeFo
         if (!a.width || !b.width) return undefined;
         const aDocBounds = (A.props as any).DocumentView?.().getBounds() || { left: 0, right: 0, top: 0, bottom: 0 };
         const bDocBounds = (B.props as any).DocumentView?.().getBounds() || { left: 0, right: 0, top: 0, bottom: 0 };
-        const acentX = (a.left + a.right) / 2;
-        const acentY = (a.top + a.bottom) / 2;
-        const bcentX = (b.left + b.right) / 2;
-        const bcentY = (b.top + b.bottom) / 2;
-        const pt1Arc = ((acentX - aDocBounds.left) > 0.1 && (aDocBounds.right - acentX) > 0.1) ||
-            ((acentY - aDocBounds.top) > 0.1 && (aDocBounds.bottom - acentY) > 0.1);
-        const pt2Arc = ((bcentX - bDocBounds.left) > 0.1 && (bDocBounds.right - bcentX) > 0.1) ||
-            ((bcentY - bDocBounds.top) > 0.1 && (bDocBounds.bottom - bcentY) > 0.1);
-        const atop2 = this.visibleY(adiv);
-        const btop2 = this.visibleY(bdiv);
         const aleft = this.visibleX(adiv);
         const bleft = this.visibleX(bdiv);
         const clipped = aleft !== a.left || atop !== a.top || bleft !== b.left || btop !== b.top;
         const pt1 = [aleft + a.width / 2, atop + a.height / 2];
         const pt2 = [bleft + b.width / 2, btop + b.width / 2];
-        const pt1vec = [pt1[0] - (aDocBounds.left + aDocBounds.right) / 2, pt1[1] - (aDocBounds.top + aDocBounds.bottom) / 2];
-        const pt2vec = [pt2[0] - (bDocBounds.left + bDocBounds.right) / 2, pt2[1] - (bDocBounds.top + bDocBounds.bottom) / 2];
+        const pt1vec = [(bDocBounds.left + bDocBounds.right) / 2 - pt1[0], (bDocBounds.top + bDocBounds.bottom) / 2 - pt1[1]];
+        const pt2vec = [(aDocBounds.left + aDocBounds.right) / 2 - pt2[0], (aDocBounds.top + aDocBounds.bottom) / 2 - pt2[1]];
         const pt1len = Math.sqrt((pt1vec[0] * pt1vec[0]) + (pt1vec[1] * pt1vec[1]));
         const pt2len = Math.sqrt((pt2vec[0] * pt2vec[0]) + (pt2vec[1] * pt2vec[1]));
         const ptlen = Math.sqrt((pt1[0] - pt2[0]) * (pt1[0] - pt2[0]) + (pt1[1] - pt2[1]) * (pt1[1] - pt2[1])) / 2;
-        const pt1norm = clipped ? [0, 0] : !pt1Arc ? [pt1vec[0] / pt1len * ptlen, pt1vec[1] / pt1len * ptlen] :
-            Math.abs(acentY - aDocBounds.top) < 0.01 ||
-                Math.abs(acentY - aDocBounds.bottom) < 0.01 ? [0, (pt2[1] - pt1[1]) / 2] : [(pt2[0] - pt1[0]) / 2, 0];
-        const pt2norm = clipped ? [0, 0] : !pt2Arc ? [pt2vec[0] / pt2len * ptlen, pt2vec[1] / pt2len * ptlen] :
-            Math.abs(bcentY - bDocBounds.top) < 0.01 ||
-                Math.abs(bcentY - bDocBounds.bottom) < 0.01 ? [0, (pt1[1] - pt2[1]) / 2] : [(pt1[0] - pt2[0]) / 2, 0];
+        const pt1norm = clipped ? [0, 0] : [pt1vec[0] / pt1len * ptlen, pt1vec[1] / pt1len * ptlen];
+        const pt2norm = clipped ? [0, 0] : [pt2vec[0] / pt2len * ptlen, pt2vec[1] / pt2len * ptlen];
         const pt1normlen = Math.sqrt(pt1norm[0] * pt1norm[0] + pt1norm[1] * pt1norm[1]) || 1;
         const pt2normlen = Math.sqrt(pt2norm[0] * pt2norm[0] + pt2norm[1] * pt2norm[1]) || 1;
         const pt1normalized = [pt1norm[0] / pt1normlen, pt1norm[1] / pt1normlen];
@@ -262,7 +227,7 @@ export class CollectionFreeFormLinkView extends React.Component<CollectionFreeFo
             this.props.LinkDocs[0].displayArrow = false;
         }
 
-        return !this.props.LinkDocs[0].opacity || !a.width || !b.width || ((!this.props.LinkDocs[0].linkDisplay) && !aActive && !bActive) ? (null) : (<>
+        return this.props.LinkDocs[0].opacity === 0 || !a.width || !b.width || ((!this.props.LinkDocs[0].linkDisplay) && !aActive && !bActive) ? (null) : (<>
             <defs>
                 <marker id="arrowhead" markerWidth="4" markerHeight="3"
                     refX="0" refY="1.5" orient="auto">
-- 
cgit v1.2.3-70-g09d2

