[feat] support crossAlign on mirrored y-axis (#9563)

src/core/core.scale.js

@@ -1344,8 +1344,17 @@ export default class Scale extends Element {
 
     if (position === 'left') {
       if (mirror) {
-        textAlign = 'left';
         x = me.right + padding;
+
+        if (crossAlign === 'near') {
+          textAlign = 'left';
+        } else if (crossAlign === 'center') {
+          textAlign = 'center';
+          x += (widest / 2);
+        } else {
+          textAlign = 'right';
+          x += widest;
+        }
       } else {
         x = me.right - tickAndPadding;
 
@@ -1361,8 +1370,17 @@ export default class Scale extends Element {
       }
     } else if (position === 'right') {
       if (mirror) {
-        textAlign = 'right';
         x = me.left + padding;
+
+        if (crossAlign === 'near') {
+          textAlign = 'right';
+        } else if (crossAlign === 'center') {
+          textAlign = 'center';
+          x -= (widest / 2);
+        } else {
+          textAlign = 'left';
+          x -= widest;
+        }
       } else {
         x = me.left + tickAndPadding;
 

test/fixtures/core.scale/crossAlignment/mirror-cross-align-left-center.js

@@ -0,0 +1,30 @@
+module.exports = {
+  config: {
+    type: 'bar',
+    data: {
+      datasets: [{
+        data: [1, 2, 3],
+      }],
+      labels: ['Long long label 1', 'Label2', 'Label3']
+    },
+    options: {
+      indexAxis: 'y',
+      scales: {
+        y: {
+          position: 'left',
+          ticks: {
+            mirror: true,
+            crossAlign: 'center',
+          },
+        },
+      }
+    }
+  },
+  options: {
+    spriteText: true,
+    canvas: {
+      height: 256,
+      width: 512
+    }
+  }
+};

test/fixtures/core.scale/crossAlignment/mirror-cross-align-left-far.js

@@ -0,0 +1,30 @@
+module.exports = {
+  config: {
+    type: 'bar',
+    data: {
+      datasets: [{
+        data: [1, 2, 3],
+      }],
+      labels: ['Long long label 1', 'Label2', 'Label3']
+    },
+    options: {
+      indexAxis: 'y',
+      scales: {
+        y: {
+          position: 'left',
+          ticks: {
+            mirror: true,
+            crossAlign: 'far',
+          },
+        },
+      }
+    }
+  },
+  options: {
+    spriteText: true,
+    canvas: {
+      height: 256,
+      width: 512
+    }
+  }
+};

test/fixtures/core.scale/crossAlignment/mirror-cross-align-left-near.js

@@ -0,0 +1,30 @@
+module.exports = {
+  config: {
+    type: 'bar',
+    data: {
+      datasets: [{
+        data: [1, 2, 3],
+      }],
+      labels: ['Long long label 1', 'Label2', 'Label3']
+    },
+    options: {
+      indexAxis: 'y',
+      scales: {
+        y: {
+          position: 'left',
+          ticks: {
+            mirror: true,
+            crossAlign: 'near',
+          },
+        },
+      }
+    }
+  },
+  options: {
+    spriteText: true,
+    canvas: {
+      height: 256,
+      width: 512
+    }
+  }
+};

test/fixtures/core.scale/crossAlignment/mirror-cross-align-right-center.js

@@ -0,0 +1,30 @@
+module.exports = {
+  config: {
+    type: 'bar',
+    data: {
+      datasets: [{
+        data: [1, 2, 3],
+      }],
+      labels: ['Long long label 1', 'Label2', 'Label3']
+    },
+    options: {
+      indexAxis: 'y',
+      scales: {
+        y: {
+          position: 'right',
+          ticks: {
+            mirror: true,
+            crossAlign: 'center',
+          },
+        },
+      }
+    }
+  },
+  options: {
+    spriteText: true,
+    canvas: {
+      height: 256,
+      width: 512
+    }
+  }
+};

test/fixtures/core.scale/crossAlignment/mirror-cross-align-right-far.js

@@ -0,0 +1,30 @@
+module.exports = {
+  config: {
+    type: 'bar',
+    data: {
+      datasets: [{
+        data: [1, 2, 3],
+      }],
+      labels: ['Long long label 1', 'Label2', 'Label3']
+    },
+    options: {
+      indexAxis: 'y',
+      scales: {
+        y: {
+          position: 'right',
+          ticks: {
+            mirror: true,
+            crossAlign: 'far',
+          },
+        },
+      }
+    }
+  },
+  options: {
+    spriteText: true,
+    canvas: {
+      height: 256,
+      width: 512
+    }
+  }
+};

test/fixtures/core.scale/crossAlignment/mirror-cross-align-right-near.js

@@ -0,0 +1,30 @@
+module.exports = {
+  config: {
+    type: 'bar',
+    data: {
+      datasets: [{
+        data: [1, 2, 3],
+      }],
+      labels: ['Long long label 1', 'Label2', 'Label3']
+    },
+    options: {
+      indexAxis: 'y',
+      scales: {
+        y: {
+          position: 'right',
+          ticks: {
+            mirror: true,
+            crossAlign: 'near',
+          },
+        },
+      }
+    }
+  },
+  options: {
+    spriteText: true,
+    canvas: {
+      height: 256,
+      width: 512
+    }
+  }
+};