From 56e8927e96b7701b1a20d3baca0b4db2bf52daf6 Mon Sep 17 00:00:00 2001
From: Hatem Alimam <me@hatemalimam.com>
Date: Fri, 12 Feb 2021 10:07:45 +0300
Subject: [PATCH] adjust text collisions

---
 src/components/Airport/index.js  | 55 +++++++++++++++++++++++++++++++-
 src/components/RunwayId/index.js | 16 ++++++++--
 2 files changed, 67 insertions(+), 4 deletions(-)

diff --git a/src/components/Airport/index.js b/src/components/Airport/index.js
index 4f54db6..3de183f 100644
--- a/src/components/Airport/index.js
+++ b/src/components/Airport/index.js
@@ -13,6 +13,9 @@ class Airport extends React.Component {
 
     this.onTooltipShow = this.onTooltipShow.bind(this);
     this.onTooltipHide = this.onTooltipHide.bind(this);
+    this.adjustTextCollisions = this.adjustTextCollisions.bind(this);
+
+    this.adjusted = {};
 
     this.state = {
       showTooltip: false,
@@ -22,6 +25,56 @@ class Airport extends React.Component {
     };
   }
 
+  adjustTextCollisions() {
+    const runwaysTexts = document.getElementsByClassName('runway-id');
+    for (let i = 0; i < runwaysTexts.length; i++) {
+      for (let j = 0; j < runwaysTexts.length; j++) {
+        const self = runwaysTexts[i];
+        const selfBoundingRect = self.getBoundingClientRect();
+        const that = runwaysTexts[j];
+        if (self != that) {
+          const thatBoundingRect = that.getBoundingClientRect();
+          if (
+            !(
+              thatBoundingRect.left > selfBoundingRect.right ||
+              thatBoundingRect.right < selfBoundingRect.left ||
+              thatBoundingRect.top > selfBoundingRect.bottom ||
+              thatBoundingRect.bottom < selfBoundingRect.top
+            )
+          ) {
+            const id = that.getAttribute('data-id');
+            if (!this.adjusted[id]) {
+              const style = window.getComputedStyle(that);
+              const matrix = new WebKitCSSMatrix(style.transform);
+
+              const isNegative = Math.sign(matrix.m42) === -1;
+
+              const transform = that.getAttribute('transform');
+              const hasRotate = transform.includes('rotate(180)');
+
+              let translate;
+              if (!isNegative) {
+                translate = matrix.m42 + 20;
+              } else {
+                translate = matrix.m42 - 20;
+              }
+
+              if (hasRotate)
+                that.setAttribute('transform', `translate(0, ${translate}) rotate(180)`);
+              else that.setAttribute('transform', `translate(0, ${translate})`);
+              this.adjusted[id] = true;
+              this.adjusted[self.getAttribute('data-id')] = true;
+            }
+          }
+        }
+      }
+    }
+  }
+
+  componentDidMount() {
+    this.adjustTextCollisions();
+  }
+
   onTooltipShow(event, text) {
     if (text) {
       this.setState({
@@ -95,7 +148,7 @@ class Airport extends React.Component {
     const minDimension = Math.min(VIEW_BOX_WIDTH, VIEW_BOX_HEIGHT);
 
     // ratio of the runways
-    this.ratio = (1 / maxRunwayLen) * (minDimension - 200);
+    this.ratio = (1 / maxRunwayLen) * (minDimension - 190);
   }
 
   render() {
diff --git a/src/components/RunwayId/index.js b/src/components/RunwayId/index.js
index b67ce74..3ecdcaf 100644
--- a/src/components/RunwayId/index.js
+++ b/src/components/RunwayId/index.js
@@ -46,10 +46,20 @@ class RunwayId extends React.Component {
 
     if (idx === 1) transform = `translate(0, -${t}) rotate(180)`;
 
-    const textX = idx === 1 ? (-1 * width) / 4 : (-1 * width) / 1;
+    const textX = idx === 1 ? (-1 * width) / 4 : (-1 * width) / 4;
     return (
-      <g className={`runway-id ${className ? className : ''}`} transform={transform}>
-        <text className={`runway-text ${textClassName ? textClassName : ''}`} x={textX} y={0 - 2}>
+      <g
+        className={`runway-id ${className ? className : ''}`}
+        transform={transform}
+        onClick={() => this.adjustOverlapedTexts()}
+        data-id={`${name}-${idx}`}
+      >
+        <text
+          className={`runway-text ${textClassName ? textClassName : ''}`}
+          x={textX}
+          y={idx === 1 ? 0 - 2 : 11}
+          transform={idx !== 1 ? 'rotate(180)' : ''}
+        >
           {name}
         </text>
         {showPatternIndicator && (