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image: fix keyboard events handling logic #18416

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image: fix keyboard events handling logic #18416

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30 changes: 20 additions & 10 deletions packages/image/src/image-viewer.vue
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Open in desktop
Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
<template>
<transition name="viewer-fade">
<div tabindex="-1" ref="el-image-viewer__wrapper" class="el-image-viewer__wrapper" :style="{ 'z-index': zIndex }">
<div v-show="visible" tabindex="-1" ref="el-image-viewer__wrapper" class="el-image-viewer__wrapper" :style="{ 'z-index': zIndex }">
<div class="el-image-viewer__mask"></div>
<!-- CLOSE -->
<span class="el-image-viewer__btn el-image-viewer__close" @click="hide">
Expand Down Expand Up @@ -91,7 +91,8 @@ export default {
initialIndex: {
type: Number,
default: 0
}
},
visible: Boolean
},

data() {
Expand Down Expand Up @@ -151,15 +152,30 @@ export default {
this.loading = true;
}
});
},
visible(val) {
if (val) {
this.show();
}
}
},
methods: {
show() {
this.deviceSupportInstall();
this.$nextTick(_ => {
// add tabindex then wrapper can be focusable via Javascript
// focus wrapper so arrow key can't cause inner scroll behavior underneath
this.$refs['el-image-viewer__wrapper'].focus();
});
},
hide() {
this.deviceSupportUninstall();
this.onClose();
},
deviceSupportInstall() {
this._keyDownHandler = rafThrottle(e => {
// prevent scroll behavior
e.preventDefault();
const keyCode = e.keyCode;
switch (keyCode) {
// ESC
Expand Down Expand Up @@ -202,11 +218,11 @@ export default {
});
}
});
on(document, 'keydown', this._keyDownHandler);
on(this.$refs['el-image-viewer__wrapper'], 'keydown', this._keyDownHandler);
on(document, mousewheelEventName, this._mouseWheelHandler);
},
deviceSupportUninstall() {
off(document, 'keydown', this._keyDownHandler);
off(this.$refs['el-image-viewer__wrapper'], 'keydown', this._keyDownHandler);
off(document, mousewheelEventName, this._mouseWheelHandler);
this._keyDownHandler = null;
this._mouseWheelHandler = null;
Expand Down Expand Up @@ -291,12 +307,6 @@ export default {
}
transform.enableTransition = enableTransition;
}
},
mounted() {
this.deviceSupportInstall();
// add tabindex then wrapper can be focusable via Javascript
// focus wrapper so arrow key can't cause inner scroll behavior underneath
this.$refs['el-image-viewer__wrapper'].focus();
}
};
</script>
8 changes: 1 addition & 7 deletions packages/image/src/main.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@
:style="imageStyle"
:class="{ 'el-image__inner--center': alignCenter, 'el-image__preview': preview }">
<template v-if="preview">
<image-viewer :z-index="zIndex" :initial-index="imageIndex" v-show="showViewer" :on-close="closeViewer" :url-list="previewSrcList"/>
<image-viewer :z-index="zIndex" :initial-index="imageIndex" :visible.sync="showViewer" :on-close="closeViewer" :url-list="previewSrcList"/>
</template>
</div>
</template>
Expand All @@ -38,8 +38,6 @@
SCALE_DOWN: 'scale-down'
};

let prevOverflow = '';

export default {
name: 'ElImage',

Expand Down Expand Up @@ -217,13 +215,9 @@
}
},
clickHandler() {
// prevent body scroll
prevOverflow = document.body.style.overflow;
document.body.style.overflow = 'hidden';
this.showViewer = true;
},
closeViewer() {
document.body.style.overflow = prevOverflow;
this.showViewer = false;
}
}
Expand Down