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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,127 @@ | ||
| import EBUS from "../event-bus"; | ||
| import { DEFAULT_THUMBNAIL } from "../img-node"; | ||
| import { Chapter } from "../page-fetcher"; | ||
| import q from "../utils/query-element"; | ||
|
|
||
| export class ChaptersPanel { | ||
|
|
||
| panel: HTMLElement; | ||
| root: HTMLElement; | ||
| thumbnail: HTMLElement; | ||
| thumbnailImg: HTMLImageElement; | ||
| thumbnailCanvas: HTMLCanvasElement; | ||
| listContainer: HTMLElement; | ||
| first: boolean = false; | ||
|
|
||
| constructor(root: HTMLElement) { | ||
| this.root = root; | ||
| this.panel = q("#chapters-panel", root); | ||
| this.thumbnail = q("#chapter-thumbnail", root); | ||
| this.thumbnailImg = q("#chapter-thumbnail-image", root); | ||
| this.thumbnailCanvas = q("#chapter-thumbnail-canvas", root); | ||
| this.listContainer = q("#chapter-list", root); | ||
|
|
||
| EBUS.subscribe("pf-update-chapters", (chapters) => { | ||
| this.updateChapterList(chapters); | ||
| if (chapters.length > 1) { | ||
| this.relocateToCenter(); | ||
| } | ||
| }); | ||
| EBUS.subscribe("pf-change-chapter", (index, chapter) => this.updateHighlight(index, chapter)); | ||
| } | ||
|
|
||
| updateChapterList(chapters: Chapter[]) { | ||
| const ul = this.listContainer.firstElementChild as HTMLElement; | ||
| chapters.forEach((ch, i) => { | ||
| const li = document.createElement("div"); | ||
| let title = ""; | ||
| if (ch.title instanceof Array) { | ||
| title = ch.title.join("\t"); | ||
| } else { | ||
| title = ch.title; | ||
| } | ||
| li.innerHTML = `<span>${title}</span>` | ||
| li.setAttribute("id", "chapter-list-item-" + ch.id.toString()); | ||
| li.classList.add("chapter-list-item"); | ||
| li.addEventListener("click", () => { | ||
| ch.onclick?.(i); | ||
| if (this.first) { | ||
| this.first = false; | ||
| this.panel.classList.add("p-collapse"); | ||
| this.panel.classList.remove("p-collapse-deny"); | ||
| this.panel.classList.remove("p-chapters-center"); | ||
| } | ||
| }); | ||
| li.addEventListener("mouseenter", () => this.updateChapterThumbnail(ch)) | ||
| ul.appendChild(li); | ||
| }); | ||
| this.updateChapterThumbnail(chapters[0]); | ||
| } | ||
|
|
||
| relocateToCenter() { | ||
| this.first = true; | ||
| this.panel.classList.remove("p-collapse"); | ||
| this.panel.classList.add("p-collapse-deny"); | ||
| this.panel.classList.add("p-chapters-center"); | ||
| const [w, h] = [this.root.offsetWidth, this.root.offsetHeight]; | ||
| const [pw, ph] = [this.panel.offsetWidth, this.panel.offsetHeight]; | ||
| const [left, top] = [(w / 2) - (pw / 2), (h / 2) - (ph / 2)]; | ||
| this.panel.style.left = left + "px"; | ||
| this.panel.style.top = top + "px"; | ||
| } | ||
|
|
||
| updateHighlight(index: number, chapter: Chapter) { | ||
| Array.from(this.listContainer.querySelectorAll("div > .chapter-list-item")).forEach((li, i) => { | ||
| if (i === index) { | ||
| li.classList.add("chapter-list-item-hl") | ||
| } else { | ||
| li.classList.remove("chapter-list-item-hl") | ||
| } | ||
| }); | ||
| this.updateChapterThumbnail(chapter); | ||
| } | ||
|
|
||
| updateChapterThumbnail(chapter: Chapter) { | ||
| this.thumbnailImg.onload = () => { | ||
| const width = this.thumbnailImg.naturalWidth; | ||
| const height = this.thumbnailImg.naturalHeight; | ||
| let [sx, sw, sy, sh] = [0, width, 0, height]; | ||
| if (width > height) { | ||
| sx = Math.floor((width - height) / 2); | ||
| sw = height; | ||
| } else if (width < height) { | ||
| sy = Math.floor((height - width) / 2); | ||
| sh = width; | ||
| } | ||
| this.thumbnailCanvas.width = sw; | ||
| this.thumbnailCanvas.height = sh; | ||
| const ctx = this.thumbnailCanvas.getContext("2d")!; | ||
| ctx.drawImage(this.thumbnailImg, sx, sy, sw, sh, 0, 0, width, height); | ||
| }; | ||
| this.thumbnailImg.src = chapter.thumbimg ?? DEFAULT_THUMBNAIL; | ||
| // create title element | ||
| this.thumbnail.querySelector(".ehvp-chapter-description")?.remove(); | ||
| const description = document.createElement("div"); | ||
| description.classList.add("ehvp-chapter-description"); | ||
| if (Array.isArray(chapter.title)) { | ||
| description.innerHTML = chapter.title.map((t) => `<span>${t}</span>`).join("<br>"); | ||
| } else { | ||
| description.innerHTML = `<span>${chapter.title}</span>`; | ||
| } | ||
| this.thumbnail.appendChild(description); | ||
| } | ||
|
|
||
| static html() { | ||
| return ` | ||
| <div id="chapters-panel" class="p-panel p-chapters p-collapse"> | ||
| <div id="chapter-thumbnail" class="chapter-thumbnail"> | ||
| <img id="chapter-thumbnail-image" src="${DEFAULT_THUMBNAIL}" alt="thumbnail" style="display:none;" /> | ||
| <canvas id="chapter-thumbnail-canvas" width="100" height="100"></canvas> | ||
| </div> | ||
| <div id="chapter-list" class="chapter-list"> | ||
| <div></div> | ||
| </div> | ||
| </div>`; | ||
| } | ||
| } | ||
|
|
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