fix(Axis): xAxis axisTick custom interval funciton work error with boundaryGap false

src/coord/Axis.ts

@@ -17,13 +17,14 @@
 * under the License.
 */
 
-import {each, map} from 'zrender/src/core/util';
+import {each, map, isFunction} from 'zrender/src/core/util';
 import {linearMap, getPixelPrecision, round} from '../util/number';
 import {
     createAxisTicks,
     createAxisLabels,
     calculateCategoryInterval
 } from './axisTickLabelBuilder';
+import { getOptionCategoryInterval } from './axisHelper';
 import Scale from '../scale/Scale';
 import { DimensionName, ScaleDataValue, ScaleTick } from '../util/types';
 import OrdinalScale from '../scale/Ordinal';
@@ -188,9 +189,10 @@ class Axis {
         }, this);
 
         const alignWithLabel = tickModel.get('alignWithLabel');
+        const isCustomIntervalTick = isFunction(getOptionCategoryInterval(tickModel as AxisBaseModel));
 
         fixOnBandTicksCoords(
-            this, ticksCoords, alignWithLabel, opt.clamp
+            this, ticksCoords, alignWithLabel, isCustomIntervalTick, opt.clamp
         );
 
         return ticksCoords;
@@ -289,7 +291,7 @@ function fixExtentWithBands(extent: [number, number], nTick: number): void {
 // to displayed labels. (So we should not use `getBandWidth` in this
 // case).
 function fixOnBandTicksCoords(
-    axis: Axis, ticksCoords: TickCoord[], alignWithLabel: boolean, clamp: boolean
+    axis: Axis, ticksCoords: TickCoord[], alignWithLabel: boolean, isCustomIntervalTick: boolean, clamp: boolean
 ) {
     const ticksLen = ticksCoords.length;
 
@@ -300,7 +302,22 @@ function fixOnBandTicksCoords(
     const axisExtent = axis.getExtent();
     let last;
     let diffSize;
-    if (ticksLen === 1) {
+    if (isCustomIntervalTick) {
+        const dataExtent = axis.scale.getExtent();
+        const shift = (axisExtent[1] - axisExtent[0]) / (dataExtent[1] - dataExtent[0] + 1);
+        each(ticksCoords, function (ticksItem) {
+            ticksItem.coord -= shift / 2;
+        });
+        last = {
+            coord: axisExtent[1],
+            tickValue: dataExtent[1] + 1
+        };
+        // if have tick add last tick
+        if (ticksCoords.length) {
+            ticksCoords.push(last);
+        }
+    }
+    else if (ticksLen === 1) {
         ticksCoords[0].coord = axisExtent[0];
         last = ticksCoords[1] = {coord: axisExtent[1], tickValue: ticksCoords[0].tickValue};
     }