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import type { LilbeeClient } from "../api";
import type { Source, SourceContent } from "../types";
import { CONTENT_TYPE, isPdfContentType } from "../types";
import { MESSAGES } from "../locales/en";
import { bindEscapeToClose, errorMessage } from "../utils";
import { formatLocation } from "./results";
// Text/* mime types that should NOT render inline through MarkdownRenderer
// even though they pass the broad text/* category. Keep narrow and explicit;
// broadening this set requires a security review.
const TEXT_INLINE_RENDER_DENY = new Set([
"text/html",
"text/javascript",
"application/javascript",
"application/xhtml+xml",
"text/css",
]);
/**
* Read-only preview for sources that aren't in the local vault (external
* server mode, or a vault-bound source whose file was removed). Fetches
* content via `/api/source` and renders markdown inline. For PDFs the modal
* embeds an `<object type="application/pdf">` pointing at the `raw=1`
* endpoint with a `#page=N` fragment — Chromium's built-in PDFium viewer
* honours that fragment, which lets the preview jump directly to the
* chunk's page. The type-locked `<object>` tag narrows the rendering
* surface for any non-PDF bytes the server might return.
*
* A future "Save to vault" button will push the content into `<vault>/lilbee/`
* once the server exposes the write path — disabled for now with a tooltip.
*/
export class SourcePreviewModal extends Modal {
private api: LilbeeClient;
private source: Source;
constructor(app: App, api: LilbeeClient, source: Source) {
super(app);
this.api = api;
this.source = source;
bindEscapeToClose(this);
}
onOpen(): void {
const { contentEl, modalEl } = this;
contentEl.empty();
contentEl.addClass("lilbee-modal");
contentEl.addClass("lilbee-preview-modal");
// Apply resize handling to the outer modal frame that Obsidian creates;
// CSS ``resize: both`` on the inner content element is clipped by the
// frame's default ``overflow: hidden``. Setting dimensions inline
// beats Obsidian's default ``width: fit-content`` without relying on
// CSS specificity escalations.
modalEl.addClass("lilbee-preview-modal-frame");
modalEl.style.width = "min(880px, 92vw)";
modalEl.style.height = "min(640px, 85vh)";
modalEl.style.resize = "both";
modalEl.style.overflow = "hidden";
modalEl.style.position = "fixed";
contentEl.createEl("h2", { text: MESSAGES.TITLE_SOURCE_PREVIEW });
this.makeDraggable(contentEl);
this.renderHeader(contentEl);
if (!this.source.source) {
new Notice(MESSAGES.ERROR_PREVIEW_INVALID_SOURCE);
contentEl.createEl("p", { text: MESSAGES.ERROR_PREVIEW_INVALID_SOURCE, cls: "lilbee-preview-error" });
this.renderFooter(contentEl);
return;
}
const bodyHost = contentEl.createDiv({ cls: "lilbee-preview-host" });
bodyHost.createDiv({ cls: "lilbee-preview-loading" });
this.renderFooter(contentEl);
void this.loadContent(bodyHost);
}
onClose(): void {
this.contentEl.empty();
if (this.dragMoveHandler) {
window.removeEventListener("pointermove", this.dragMoveHandler);
this.dragMoveHandler = null;
}
if (this.dragUpHandler) {
window.removeEventListener("pointerup", this.dragUpHandler);
this.dragUpHandler = null;
}
}
private dragMoveHandler: ((e: PointerEvent) => void) | null = null;
private dragUpHandler: ((e: PointerEvent) => void) | null = null;
// Promotes Obsidian's auto-centered modal to explicit top/left on the
// first drag so the modal stays where the user puts it across resize.
// The whole chrome (title, header, footer, padding) is the drag surface,
// but pointer events that land inside the embedded body or on an
// interactive element (button/input/link) pass through.
private makeDraggable(handle: HTMLElement): void {
handle.addClass("lilbee-preview-drag-handle");
handle.addEventListener("pointerdown", (down: PointerEvent) => {
if (down.button !== 0) return;
const target = down.target as HTMLElement | null;
if (target?.closest(".lilbee-preview-host, button, input, textarea, select, a")) return;
down.preventDefault();
const rect = this.modalEl.getBoundingClientRect();
const offsetX = down.clientX - rect.left;
const offsetY = down.clientY - rect.top;
this.modalEl.style.margin = "0";
this.modalEl.style.left = `${rect.left}px`;
this.modalEl.style.top = `${rect.top}px`;
const move = (e: PointerEvent): void => {
this.modalEl.style.left = `${e.clientX - offsetX}px`;
this.modalEl.style.top = `${e.clientY - offsetY}px`;
};
const up = (): void => {
window.removeEventListener("pointermove", move);
window.removeEventListener("pointerup", up);
this.dragMoveHandler = null;
this.dragUpHandler = null;
};
this.dragMoveHandler = move;
this.dragUpHandler = up;
window.addEventListener("pointermove", move);
window.addEventListener("pointerup", up);
});
}
private renderHeader(container: HTMLElement): void {
const header = container.createDiv({ cls: "lilbee-preview-header" });
header.createEl("span", {
text: this.source.vault_path ?? this.source.source,
cls: "lilbee-preview-path",
});
const loc = formatLocation(this.source);
if (loc) {
container.createEl("span", { text: loc, cls: "lilbee-preview-meta" });
}
}
private renderFooter(container: HTMLElement): void {
const footer = container.createDiv({ cls: "lilbee-preview-footer" });
// When the source resolves to a vault file, swap the disabled
// "Save to vault" stub for an "Open in vault" affordance — clicking
// it dismisses the preview and opens the original file in the main
// pane via Obsidian's standard link routing.
const inVaultPath = this.resolveVaultPath();
if (inVaultPath !== null) {
const openBtn = footer.createEl("button", {
text: MESSAGES.LABEL_PREVIEW_OPEN_IN_VAULT,
cls: "lilbee-preview-open-vault",
});
openBtn.addEventListener("click", () => {
this.app.workspace.openLinkText(inVaultPath, "");
this.close();
});
} else {
const save = footer.createEl("button", {
text: MESSAGES.LABEL_PREVIEW_SAVE_TO_VAULT,
cls: "lilbee-preview-save",
}) as HTMLButtonElement;
save.disabled = true;
save.setAttribute("title", MESSAGES.TOOLTIP_PREVIEW_SAVE_SOON);
}
const close = footer.createEl("button", {
text: MESSAGES.LABEL_PREVIEW_CLOSE,
cls: "lilbee-preview-close mod-cta",
});
close.addEventListener("click", () => this.close());
}
private resolveVaultPath(): string | null {
const vault = this.app.vault;
const vaultPath = this.source.vault_path;
if (vaultPath && vault.getAbstractFileByPath(vaultPath)) {
return vaultPath;
}
if (this.source.source && vault.getAbstractFileByPath(this.source.source)) {
return this.source.source;
}
return null;
}
private async loadContent(host: HTMLElement): Promise<void> {
try {
const content = await this.api.getSource(this.source.source);
host.empty();
this.renderBody(host, content);
} catch (err) {
const reason = errorMessage(err, String(err));
host.empty();
host.createEl("p", { text: MESSAGES.ERROR_PREVIEW_LOAD(reason), cls: "lilbee-preview-error" });
new Notice(MESSAGES.ERROR_PREVIEW_LOAD(reason));
}
}
private renderBody(host: HTMLElement, content: SourceContent): void {
const ct = content.content_type;
const isPdf = isPdfContentType(this.source.content_type) || isPdfContentType(ct);
if (isPdf) {
this.renderPdf(host);
return;
}
// Mirror the server's raw-content allowlist: any text/* may render through
// MarkdownRenderer, except formats that can carry script (text/html,
// text/javascript, application/xhtml+xml) or styling (text/css). The
// <object> tag protects the PDF path; this gate protects the JSON path.
const textBlocked = TEXT_INLINE_RENDER_DENY.has(ct);
if (!textBlocked && ct.startsWith("text/")) {
const body = host.createDiv({ cls: "lilbee-preview-body" });
void MarkdownRenderer.render(this.app, content.markdown, body, "", this);
return;
}
host.createEl("p", {
text: MESSAGES.ERROR_PREVIEW_UNSUPPORTED(ct),
cls: "lilbee-preview-error",
});
}
private renderPdf(host: HTMLElement): void {
const body = host.createDiv({ cls: "lilbee-preview-body" });
const frame = body.createEl("object", { cls: "lilbee-preview-pdf-frame" });
frame.setAttribute("type", CONTENT_TYPE.PDF);
frame.setAttribute("data", this.rawSourceUrl(this.source.page_start));
}
private rawSourceUrl(page: number | null): string {
// Direct URL to the raw PDF bytes for the embedded viewer to fetch.
// Appending `#page=N` makes Chromium's PDFium viewer open at that page.
const params = new URLSearchParams({ source: this.source.source, raw: "1" });
const base = (this.api as unknown as { baseUrl?: string }).baseUrl ?? "";
const fragment = page && page > 0 ? `#page=${page}` : "";
return `${base}/api/source?${params.toString()}${fragment}`;
}
}
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