Bilibili-Evolved/video/screenshot/screenshot.js
2019-05-19 18:57:54 +08:00

177 lines
6.5 KiB
JavaScript

import { getFriendlyTitle } from '../title';
const canvas = document.createElement("canvas");
class Screenshot {
constructor(video, videoTime) {
this.url = "";
this.timeStamp = new Date().getTime();
this.video = video;
this.videoTime = videoTime;
// this.url = URL.createObjectURL(this.blob);
this.createUrl();
}
async createUrl() {
canvas.width = this.video.videoWidth;
canvas.height = this.video.videoHeight;
const context = canvas.getContext("2d");
if (context === null) {
throw new Error("视频截图失败: canvas 未创建或创建失败.");
}
context.drawImage(this.video, 0, 0);
canvas.toBlob(blob => {
if (blob === null) {
throw new Error("视频截图失败: 创建 blob 失败.");
}
this.blob = blob;
this.url = URL.createObjectURL(blob);
}, "image/png");
}
get filename() {
return `${getFriendlyTitle()} @${this.videoTime.toString()}:${this.timeStamp.toString()}.png`;
}
get id() {
return this.videoTime.toString() + this.timeStamp.toString();
}
revoke() {
URL.revokeObjectURL(this.url);
}
}
export const takeScreenshot = (video) => {
const time = video.currentTime;
return new Screenshot(video, time);
// return new Promise<Screenshot>((resolve, reject) =>
// {
// const context = canvas.getContext("2d");
// if (canvas === null || context === null)
// {
// reject("视频截图失败: canvas 未创建或创建失败.");
// return;
// }
// context.drawImage(video, 0, 0);
// canvas.toBlob(blob =>
// {
// if (blob === null)
// {
// reject("视频截图失败: 创建 blob 失败.");
// return;
// }
// resolve(new Screenshot(blob, time));
// }, "image/png");
// });
};
resources.applyStyle("videoScreenshotStyle");
document.body.insertAdjacentHTML("beforeend", /*html*/ `
<div class="video-screenshot-container">
<transition-group class="video-screenshot-list" name="video-screenshot-list" tag="div">
<video-screenshot v-for="screenshot of screenshots" v-bind:filename="screenshot.filename" v-bind:object-url="screenshot.url" v-on:discard="discard(screenshot)" v-bind:key="screenshot.id"></video-screenshot>
</transition-group>
<div v-show="showBatch" class="video-screenshot-batch">
<a class="batch-link" style="display:none" v-bind:download="batchFilename"></a>
<button v-on:click="saveAll">
<i class="mdi mdi-content-save"></i>全部保存
</button>
<button v-on:click="discardAll">
<i class="mdi mdi-delete-forever"></i>全部丢弃
</button>
</div>
</div>
`);
Vue.component("video-screenshot", {
props: {
objectUrl: String,
filename: String,
},
template: /*html*/ `
<div class="video-screenshot-thumbnail">
<img v-if="objectUrl" v-bind:src="objectUrl">
<div class="mask" v-if="objectUrl">
<a class="link" style="display:none" v-bind:href="objectUrl" v-bind:download="filename"></a>
<button v-on:click="save" class="save" title="保存"><i class="mdi mdi-content-save-outline"></i></button>
<button v-on:click="discard" title="丢弃" class="discard"><i class="mdi mdi-delete-forever-outline"></i></button>
</div>
<div class="loading" v-else>
</div>
</div>`,
methods: {
discard() {
this.$emit("discard");
},
save() {
this.$el.querySelector(".link").click();
this.discard();
},
},
});
const screenShotsList = new Vue({
el: ".video-screenshot-container",
data: {
screenshots: [],
batchFilename: getFriendlyTitle() + ".zip",
},
methods: {
discard(screenshot) {
this.screenshots.splice(this.screenshots.indexOf(screenshot), 1);
screenshot.revoke();
},
async saveAll() {
const zip = new JSZip();
this.screenshots.forEach((it) => {
zip.file(it.filename, it.blob, {
date: new Date(it.timeStamp),
});
});
const blob = await zip.generateAsync({ type: "blob" });
const link = this.$el.querySelector(".batch-link");
link.href = URL.createObjectURL(blob);
link.click();
URL.revokeObjectURL(link.href);
link.href = "";
this.discardAll();
},
discardAll() {
this.screenshots.forEach((it) => it.revoke());
this.screenshots = [];
},
},
computed: {
showBatch() {
return this.screenshots.length >= 2;
},
},
});
Observer.videoChange(async () => {
const video = await SpinQuery.select("#bofqi video");
const time = await SpinQuery.select(".bilibili-player-video-time");
if (time === null || document.querySelector(".video-take-screenshot")) {
return;
}
time.insertAdjacentHTML("afterend", /*html*/ `
<div class="video-take-screenshot" title="截图">
<span><i class="mdi mdi-camera"></i></span>
</div>`);
const screenshotButton = document.querySelector(".video-take-screenshot");
screenshotButton.addEventListener("click", () => {
const screenshot = takeScreenshot(video);
screenShotsList.screenshots.unshift(screenshot);
});
document.addEventListener("keydown", e => {
if (document.activeElement && ["input", "textarea"].includes(document.activeElement.nodeName.toLowerCase())) {
return;
}
if (e.ctrlKey && e.altKey && e.key.toLowerCase() === "c") {
e.stopPropagation();
e.preventDefault();
screenshotButton.click();
}
});
});
export default {
export: {
takeScreenshot,
screenShotsList,
},
unload: () => document.querySelectorAll(".bilibili-player-video-control-bottom .video-take-screenshot,.video-screenshot-container")
.forEach(it => it.setAttribute("style", "display: none !important")),
reload: () => document.querySelectorAll(".bilibili-player-video-control-bottom .video-take-screenshot,.video-screenshot-container")
.forEach(it => it.setAttribute("style", "display: flex !important")),
};