ce066bb4ca
Select does what selecting does in every editor people already know. Double-click bare page and a caret opens there; double-click the document's own words and they open for replacement; what is selected copies with Ctrl+C, pastes with Ctrl+V and goes with Del. Nothing was taken away — a drag on empty page still gathers an area, and a drag that starts on words still selects words to copy. Type text and Edit text were two buttons for one question the click already answers. They are one Text tool: land on the document's own words and it offers to replace them, land anywhere else and it starts new text. The words light up under the cursor so which is which is visible before clicking, not after. The toolbar says what it is for. Select, Text and Sign are labelled and set apart; the drawing kit and the markup kit are their own groups. Sign gets a pen icon over a signature rather than a squiggle that could have been anything. Signatures take ink — black, blue, red, green — chosen while drawing and kept with the signature, because people sign in a particular colour and it belongs to the signature, not to whichever swatch was armed. And they turn: a grip above the box, free rotation, Shift to snap to 15°, for the signing line that is not square to the page. Two faults the tests found, both invisible by eye: The rotate grip was drawn in the right place and could not be grabbed — the selection bar floats directly above a mark, which is exactly where the grip sits, and it swallowed every click. The bar now stands clear of it. Undo would not undo a first rotation. Restoring a mark with Object.assign copies the keys the original HAD, so a property the drag introduced survived the restore; the journal then recorded the rotated state as the state to go back to. Restoring now forgets keys the original never had, which fixes every future property with the same shape. Also: building a document from pictures or joins refuses to start a second one on top of the first, and says so rather than failing quietly.
784 lines
33 KiB
JavaScript
784 lines
33 KiB
JavaScript
// Pointer behaviour for every tool.
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//
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// The editor is modal: one tool is armed, and what a drag does depends only on
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// which. The alternative — inferring intent from what is under the cursor — is
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// what makes PDF annotators infuriating, because a drag meant to draw a box
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// selects a paragraph instead. Modality is enforced in CSS (see the
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// body[data-mode] rules): with a drawing tool armed, the text and form layers
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// stop taking pointer events entirely, so a drag cannot be stolen.
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//
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// The text-markup tools are the deliberate exception. Highlight, underline and
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// strikeout all work BY selecting text — the text layer stays live, the browser
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// does the selection, and on release we convert the selection's client rects
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// into user space. Rebuilding text selection over pdf.js's span soup would be
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// worse at it.
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//
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// Placing something one-shot — a text stamp, a signature — drops straight back
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// to the select tool with the new mark selected. Staying armed means the next
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// click stamps a second copy, which is almost never what was wanted, and it
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// puts the thing just placed immediately within reach of a nudge or a resize.
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import { ASCENT, boundsOf, boxesOverlap, normBox, translatePatch, resizeBox, scaleToBox } from "./shape.js";
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const MIN_DRAG = 3; // CSS px before a press counts as a drag
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const DOUBLE_CLICK_MS = 450; // window for a second click on the same mark
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const SIG_WIDTH_PT = 170; // default placed width of a signature
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const DESCENDER = 0.26; // how far below the baseline a glyph can reach, as a fraction of size
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/** Tools that mark up existing text rather than drawing free-hand. */
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export const TEXT_MARKUP = new Set(["highlight", "underline", "strikeout"]);
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/** Tools that place something with a single click. */
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const STAMP_TOOLS = new Set(["signature"]);
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/**
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* Put `a` back exactly as `orig` was — including forgetting keys `orig`
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* never had.
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*
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* Object.assign alone copies the keys the original HAD, so a property the
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* drag introduced survives the restore. That is not a tidiness point: the
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* journal snapshots the restored mark as the "before", so a first rotation
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* of a never-rotated signature was recorded as already rotated, and undo
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* had nothing to undo.
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*/
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function restoreExactly(a, orig) {
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for (const k of Object.keys(a)) if (!(k in orig)) delete a[k];
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Object.assign(a, orig);
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}
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export class Tools {
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constructor({ strip, model, host }) {
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this.strip = strip;
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this.model = model;
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// host (editor.js): { toast, onChange, selectTool, onSelectionChange,
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// beginText, editText, editRun, chooseSignature,
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// signature }
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this.host = host;
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this.tool = "select";
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this.color = "#ffd400";
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this.width = 2.5;
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this.fill = false; // shapes: outline only, or filled
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this.fillOpacity = 0.25;
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this.selected = null; // the anchor of the selection, or null
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this.selection = new Set(); // every selected mark
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this.drag = null;
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// Opening a second document builds a second Tools over the same container.
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// Without a way to unbind, the first one stays subscribed, keeps pointing
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// at a torn-down strip, and throws on the next click — so every listener
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// goes on one signal and destroy() drops the lot.
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this._abort = new AbortController();
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const opts = { signal: this._abort.signal };
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const c = strip.container;
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c.addEventListener("pointerdown", (e) => this.onDown(e), opts);
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c.addEventListener("pointermove", (e) => this.onMove(e), opts);
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window.addEventListener("pointerup", (e) => this.onUp(e), opts);
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}
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destroy() {
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this._abort.abort();
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this.drag = null;
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this.selected = null;
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this.selection = new Set();
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}
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get mode() {
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if (this.tool === "select") return "select";
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if (TEXT_MARKUP.has(this.tool)) return "highlight";
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// The text tool needs the document's own words to be hit-testable, so a
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// click on them can replace them. A stamp tool must NOT, so its click
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// lands on the page rather than inside a text selection.
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if (this.tool === "text") return "text";
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if (STAMP_TOOLS.has(this.tool)) return "stamp";
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return "draw";
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}
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setTool(t) {
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this.tool = t;
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this._setSelected(null);
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document.body.dataset.mode = this.mode;
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this.host.onChange?.();
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}
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/** The one place selection changes, so the host never misses one. */
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_setSelected(id) { this._setSelection(id ? [id] : []); }
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/**
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* Select a set of marks.
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*
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* `selection` is the truth; `selected` is the one of them the single-mark
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* paths work on — the anchor — and is null when nothing is selected. With
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* exactly one mark the two say the same thing, which is why every existing
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* caller kept working when this grew from an id into a set.
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*/
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_setSelection(ids) {
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const list = [...new Set(ids)].filter((id) => !!this.model.annot(id));
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this.selection = new Set(list);
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this.selected = list.length ? list[0] : null;
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this.strip.refreshAllOverlays(this.selection);
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this.host.onSelectionChange?.(this.selected);
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}
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select(id) { this._setSelected(id); }
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selectMany(ids) { this._setSelection(ids); }
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/** Every selected mark, as objects. */
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selectedAnnots() {
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return [...this.selection].map((id) => this.model.annot(id)).filter(Boolean);
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}
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setColor(c) {
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this.color = c;
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// Redaction is black because it is a redaction; it does not take a colour.
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const ids = this.selectedAnnots().filter((a) => a.kind !== "redact").map((a) => a.id);
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if (ids.length) this.patchSelected({ color: c }, ids);
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}
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setFill(on) {
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this.fill = !!on;
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const ids = this.selectedAnnots()
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.filter((a) => a.kind === "rect" || a.kind === "ellipse").map((a) => a.id);
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if (ids.length) this.patchSelected({ fill: this.fill }, ids);
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}
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setWidth(w) {
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this.width = w;
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const ids = this.selectedAnnots()
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.filter((a) => a.kind !== "text" && a.kind !== "redact").map((a) => a.id);
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if (ids.length) this.patchSelected({ width: w }, ids);
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}
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/** Change the selected marks, as one undo step. */
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patchSelected(patch, ids = null) {
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const list = ids || [...this.selection];
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if (!list.length) return false;
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const ok = list.length === 1
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? this.model.moveAnnot(list[0], patch)
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: this.model.moveAnnots(list, patch);
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this.strip.refreshAllOverlays(this.selection);
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this.host.onSelectionChange?.(this.selected);
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this.host.onChange?.();
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return ok;
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}
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deleteSelected() {
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const list = [...this.selection];
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if (!list.length) return false;
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const ok = list.length === 1
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? this.model.removeAnnot(list[0])
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: this.model.removeAnnots(list);
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this._setSelected(null);
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this.host.onChange?.();
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return ok;
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}
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/** Drop a copy of each selected mark, offset so they are visibly seconds. */
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duplicateSelected() {
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const originals = this.selectedAnnots();
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if (!originals.length) return null;
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const off = 12;
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const clone = (a) => {
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const copy = { ...structuredClone(a), ...translatePatch(a, off, -off) };
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delete copy.id;
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delete copy._w;
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delete copy._editing;
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return copy;
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};
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if (originals.length === 1) {
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const made = this.model.addAnnot(clone(originals[0]));
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this._setSelected(made.id);
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this.host.onChange?.();
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return made;
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}
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// One step for the group, and the copies end up selected so the next
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// drag moves the copies rather than the originals.
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const made = [];
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this.model.edit(`duplicate ${originals.length} marks`, () => {
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for (const a of originals) made.push(this.model.pushAnnot(clone(a)));
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return true;
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});
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this._setSelection(made.map((m) => m.id));
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this.host.onChange?.();
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return made;
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}
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// ---- pointer ------------------------------------------------------
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onDown(e) {
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if (e.button !== 0) return;
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// A resize handle is checked before anything else, and whatever tool is
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// armed. Two reasons it comes first: it sits outside the mark's own
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// bounds, so the page under it may not even be the page the mark is on;
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// and a shape is selected the instant it is drawn, so grabbing a corner
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// has to work right then, without a detour through the select tool to
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// resize the thing you are still looking at.
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//
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// It cannot be confused with drawing. A handle is a 9 px square that
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// exists only while something is selected; nobody aims at one by
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// accident, and Escape drops the selection if the space is wanted back.
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const handle = e.target?.closest?.(".handle")?.dataset?.handle;
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if (handle && this.selected) {
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const a = this.model.annot(this.selected);
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const ov = a && this.strip.overlayFor(a.page);
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if (a && ov?.viewport && handle === "rotate") {
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// Turning is measured from the mark's centre, so the grip follows the
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// pointer round rather than jumping to it.
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const b = boundsOf(a);
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this.drag = {
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kind: "rotate", uid: a.page, id: a.id, orig: structuredClone(a),
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cx0: a.x + a.w / 2, cy0: a.y + a.h / 2,
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from: null, cx: e.clientX, cy: e.clientY, moved: false, box: b,
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};
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e.preventDefault();
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return;
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}
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if (a && ov?.viewport) {
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const view = this.strip.views.get(a.page);
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const r = view.pv.div.getBoundingClientRect();
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const [hx, hy] = ov.toPdf(e.clientX - r.left, e.clientY - r.top);
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this.drag = {
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kind: "resize", uid: a.page, id: a.id, handle,
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x0: hx, y0: hy, orig: structuredClone(a), from: boundsOf(a),
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cx: e.clientX, cy: e.clientY, moved: false,
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};
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e.preventDefault();
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return;
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}
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}
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// Dragging what is already selected moves it, whatever tool is armed.
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// A tool drops back to select after it stamps, but a shape tool stays
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// armed for the next shape — so the mark you just drew could be resized
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// by its handles and not moved by its middle, which is a strange half of
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// an editor. Only the SELECTED mark does this: a press anywhere else
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// still draws.
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if (this.selected && this.tool !== "select" &&
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e.target?.closest?.(".mark")?.dataset?.id === this.selected) {
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const a = this.model.annot(this.selected);
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const spot = this.strip.pageAt(e.clientX, e.clientY);
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const ovm = a && this.strip.overlayFor(a.page);
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if (a && spot && spot.uid === a.page && ovm?.viewport) {
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const [mx, my] = ovm.toPdf(spot.vx, spot.vy);
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this.drag = this._beginMove(a.page, a.id, mx, my, e);
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e.preventDefault();
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return;
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}
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}
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const hit = this.strip.pageAt(e.clientX, e.clientY);
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if (!hit) return;
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const ov = this.strip.overlayFor(hit.uid);
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if (!ov || !ov.viewport) return;
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if (TEXT_MARKUP.has(this.tool)) return; // let the browser select text
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const [x, y] = ov.toPdf(hit.vx, hit.vy);
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if (this.tool === "select") {
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const id = e.target?.closest?.(".mark")?.dataset?.id || null;
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// Double-click is detected here rather than from a `dblclick` listener.
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// Selecting a mark calls preventDefault() on the pointerdown, and that
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// suppresses the compatibility mouse events the browser would otherwise
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// synthesise a dblclick from — so the native event never arrives.
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const now = Date.now();
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const double = !!id && this._lastClick?.id === id && now - this._lastClick.t < DOUBLE_CLICK_MS;
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this._lastClick = id ? { id, t: now } : null;
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// A second kind of double-click, by POSITION rather than by mark: the
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// page itself and the document's own words are not marks, and both
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// answer to being double-clicked.
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const near = this._lastPress &&
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Math.hypot(e.clientX - this._lastPress.x, e.clientY - this._lastPress.y) < 6;
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const doubleAnywhere = !!near && now - this._lastPress.t < DOUBLE_CLICK_MS;
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this._lastPress = { x: e.clientX, y: e.clientY, t: now };
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if (!id) {
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const span = e.target?.closest?.(".textLayer span");
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// Double-click on the document's own words: replace that run, the
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// same thing the text tool does, because "edit what is there" and
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// "select something" are one gesture in every editor people already
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// know.
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if (doubleAnywhere && span && span.textContent.trim()) {
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this._setSelected(null);
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e.preventDefault();
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this._replaceRunAt(e, hit.uid);
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return;
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}
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// Double-click on bare page: start typing there.
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if (doubleAnywhere && !span) {
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this._setSelected(null);
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e.preventDefault();
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this.host.beginText?.({ uid: hit.uid, x, y });
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return;
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}
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// Empty page: start a rubber band. A press that never moves is just
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// a click on nothing, and onUp treats it as one — it clears the
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// selection, exactly as it always did.
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this._setSelected(null);
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// ...unless the press is on one of the document's own form fields.
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// Starting a band there means calling preventDefault, and that is
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// what gives a text field its caret, so the field would go dead.
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if (e.target?.closest?.(".annotationLayer")) return;
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// ...or on the document's own words, where a drag means selecting
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// them to copy. A band is started from the space between things,
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// which is where a hand reaches for one anyway.
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if (span) return;
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this.drag = { kind: "marquee", uid: hit.uid, x0: x, y0: y, x, y,
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cx: e.clientX, cy: e.clientY, moved: false };
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e.preventDefault();
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return;
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}
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// Shift adds to, or takes away from, what is already selected.
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if (e.shiftKey) {
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const next = new Set(this.selection);
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next.has(id) ? next.delete(id) : next.add(id);
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this._setSelection([...next]);
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e.preventDefault();
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return;
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}
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// Pressing on a mark that is already part of a group keeps the group,
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// so the drag moves all of it. Pressing on any other mark selects just
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// that one.
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if (!this.selection.has(id)) this._setSelected(id);
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e.preventDefault();
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if (double && this.selection.size === 1) {
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const a = this.model.annot(id);
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// A stamp is edited where it sits; a replaced run keeps its dialog,
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// which is where it explains what it is replacing.
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if (a?.kind === "text") { this.host.beginText?.({ id }); return; }
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if (a?.kind === "textedit") { this.host.editText?.(id, null); return; }
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}
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this.drag = this._beginMove(hit.uid, id, x, y, e);
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return;
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}
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if (this.tool === "text") {
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// One text tool, two jobs, told apart by what is under the click:
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// words that are already in the document get replaced, and anywhere
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// else gets a caret. They were two buttons, which asked the user to
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// decide in advance something the click already says.
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e.preventDefault();
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if (this._replaceRunAt(e, hit.uid)) return;
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this.host.beginText?.({ uid: hit.uid, x, y });
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return;
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}
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if (this.tool === "signature") {
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this._placeSignature(hit.uid, x, y);
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e.preventDefault();
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return;
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}
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// Drawing tools: start a drag with a live preview.
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this.drag = { kind: this.tool, uid: hit.uid, x0: x, y0: y, x, y,
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pts: this.tool === "pen" ? [[x, y]] : null,
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cx: e.clientX, cy: e.clientY, moved: false };
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e.preventDefault();
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}
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/**
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* If the press landed on a run of the document's own text, open it for
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* replacement and say so.
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*
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* A text-layer span IS a run, which is why this is a one-line test: pdf.js
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* groups glyphs into spans by the same runs the PDF itself declares.
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* @returns true when it took the click.
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*/
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_replaceRunAt(e, uid) {
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const span = e.target?.closest?.(".textLayer span");
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if (!span || !span.textContent.trim()) return false;
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const run = this.describeRun(span, uid);
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if (!run) return false;
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// A press on text starts a browser selection; the dialog is about to
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// cover it, and a half-highlighted line underneath reads as a fault.
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try { window.getSelection()?.removeAllRanges(); } catch {}
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this.host.editRun?.(run);
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return true;
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}
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/**
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* A move drag, of one mark or of the whole group.
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*
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* `origs` holds every mark's starting geometry: each one shifts from where
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* IT was, not from where the one under the cursor was.
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*/
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_beginMove(uid, id, x, y, e) {
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const ids = this.selection.has(id) ? [...this.selection] : [id];
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const origs = new Map();
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for (const i of ids) {
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const a = this.model.annot(i);
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// A group can only be dragged within one page: a mark carries its page,
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// and PDF user space means nothing across two of them.
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if (a && a.page === uid) origs.set(i, structuredClone(a));
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}
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return { kind: "move", uid, id, x0: x, y0: y, origs,
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orig: origs.get(id) || structuredClone(this.model.annot(id)),
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cx: e.clientX, cy: e.clientY, moved: false };
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}
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onMove(e) {
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const d = this.drag;
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if (!d) return;
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const ov = this.strip.overlayFor(d.uid);
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if (!ov || !ov.viewport) return;
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const view = this.strip.views.get(d.uid);
|
|
if (!view) { this.drag = null; return; }
|
|
const rect = view.pv.div.getBoundingClientRect();
|
|
// A drag that wanders off the page stays on it. Marks outside the page
|
|
// box are invisible in any PDF reader, so letting one be drawn there
|
|
// would only produce something that disappears on save.
|
|
const cx = Math.min(Math.max(e.clientX, rect.left), rect.right);
|
|
const cy = Math.min(Math.max(e.clientY, rect.top), rect.bottom);
|
|
const [x, y] = ov.toPdf(cx - rect.left, cy - rect.top);
|
|
d.x = x; d.y = y;
|
|
if (!d.moved && Math.hypot(e.clientX - (d.cx ?? e.clientX), e.clientY - (d.cy ?? e.clientY)) > MIN_DRAG) d.moved = true;
|
|
|
|
if (d.kind === "marquee") {
|
|
this.strip.setPreview(d.uid, { kind: "marquee", x0: d.x0, y0: d.y0, x1: x, y1: y });
|
|
return;
|
|
}
|
|
if (d.kind === "rotate") {
|
|
const a = this.model.annot(d.id);
|
|
if (!a) return;
|
|
// User space has y upwards, so a turn that looks clockwise on screen is
|
|
// counter-clockwise here; negating keeps "drag right" meaning "turn
|
|
// right" to the person doing it.
|
|
const angle = -Math.atan2(y - d.cy0, x - d.cx0) * 180 / Math.PI - 90;
|
|
if (d.from === null) d.from = angle - (d.orig.rotate || 0);
|
|
let deg = angle - d.from;
|
|
// Shift snaps, for the common case of straightening something by a few
|
|
// degrees or turning it exactly a quarter.
|
|
if (e.shiftKey) deg = Math.round(deg / 15) * 15;
|
|
a.rotate = ((deg % 360) + 360) % 360;
|
|
d.moved = true;
|
|
this.strip.refreshOverlay(d.uid, this.selection);
|
|
this.host.rotating?.(a.rotate);
|
|
return;
|
|
}
|
|
if (d.kind === "move") {
|
|
// Live and un-journalled; the whole gesture is committed once on release
|
|
// so undo steps back over the drag, not over each mouse move.
|
|
for (const [id, orig] of d.origs) {
|
|
const a = this.model.annot(id);
|
|
if (a) Object.assign(a, translatePatch(orig, x - d.x0, y - d.y0));
|
|
}
|
|
d.moved = true;
|
|
this.strip.refreshOverlay(d.uid, this.selection);
|
|
return;
|
|
}
|
|
if (d.kind === "resize") {
|
|
const a = this.model.annot(d.id);
|
|
if (!a) return;
|
|
// Always mapped from the ORIGINAL geometry, never from the last frame,
|
|
// so a drag back to where it started restores the mark exactly.
|
|
if (d.handle === "p1" || d.handle === "p2") {
|
|
Object.assign(a, d.handle === "p1" ? { x1: x, y1: y } : { x2: x, y2: y });
|
|
} else {
|
|
const uniform = d.orig.kind === "text" || d.orig.kind === "signature";
|
|
const to = resizeBox(d.from, d.handle, x - d.x0, y - d.y0, { uniform });
|
|
Object.assign(a, scaleToBox(d.orig, d.from, to));
|
|
}
|
|
d.moved = true;
|
|
this.strip.refreshOverlay(d.uid, d.id);
|
|
return;
|
|
}
|
|
if (d.kind === "pen") { d.pts.push([x, y]); }
|
|
this.strip.setPreview(d.uid, this._previewAnnot(d));
|
|
}
|
|
|
|
onUp(e) {
|
|
// A handle or move drag is finished here whatever tool is armed. Without
|
|
// this the text-markup tools would return on the line below and strand a
|
|
// resize half-done: applied to the live mark, never journalled, and with
|
|
// this.drag still set so the next press behaves oddly.
|
|
const inFlight = this.drag;
|
|
const live = inFlight && ["resize", "move", "rotate", "marquee"].includes(inFlight.kind);
|
|
if (!live && TEXT_MARKUP.has(this.tool)) {
|
|
this._commitTextMarkup();
|
|
return;
|
|
}
|
|
const d = inFlight;
|
|
this.drag = null;
|
|
if (!d) return;
|
|
this.strip.setPreview(null, null);
|
|
|
|
if (d.kind === "marquee") {
|
|
// A press that never moved is a click on empty space: the selection is
|
|
// already cleared, and there is nothing to gather.
|
|
if (d.moved) this._selectWithin(d.uid, d.x0, d.y0, d.x, d.y);
|
|
else this.strip.refreshAllOverlays(this.selection);
|
|
this.host.onChange?.();
|
|
return;
|
|
}
|
|
if (d.kind === "move" || d.kind === "resize" || d.kind === "rotate") {
|
|
const a = this.model.annot(d.id);
|
|
if (!a || !d.moved) { this.strip.refreshOverlay(d.uid, this.selection); return; }
|
|
if (d.origs && d.origs.size > 1) this._commitGroupMove(d);
|
|
else this._commitLiveEdit(a, d.orig);
|
|
this._setSelection([...this.selection]);
|
|
this.host.onChange?.();
|
|
return;
|
|
}
|
|
|
|
const a = this._previewAnnot(d, true);
|
|
if (a) {
|
|
const made = this.model.addAnnot(a);
|
|
this._setSelected(made.id);
|
|
} else {
|
|
this.strip.refreshAllOverlays(this.selection);
|
|
}
|
|
this.host.onChange?.();
|
|
}
|
|
|
|
// A live drag mutates the mark in place so the screen keeps up. To land it
|
|
// on the undo stack as ONE step, put the original back and re-apply the
|
|
// result through the model.
|
|
/**
|
|
* Everything the rubber band touched, on the page it was drawn on.
|
|
*
|
|
* Touching counts, not enclosing. A band you have to draw right around a
|
|
* long arrow to catch it is a band you draw twice; catching what you swept
|
|
* over is what people expect from sweeping.
|
|
*/
|
|
_selectWithin(uid, x0, y0, x1, y1) {
|
|
const box = {
|
|
x: Math.min(x0, x1), y: Math.min(y0, y1),
|
|
w: Math.abs(x1 - x0), h: Math.abs(y1 - y0),
|
|
};
|
|
const hits = this.model.annotsFor(uid)
|
|
.filter((a) => { const b = boundsOf(a); return b && boxesOverlap(b, box); })
|
|
.map((a) => a.id);
|
|
this._setSelection(hits);
|
|
// Only the empty case is worth a toast; when it caught something, the
|
|
// boxes on screen and the status line have already said so.
|
|
if (!hits.length) this.host.toast?.("Nothing in that area");
|
|
}
|
|
|
|
/** A group drag, landed on the undo stack as one step. */
|
|
_commitGroupMove(d) {
|
|
const after = new Map();
|
|
for (const id of d.origs.keys()) {
|
|
const a = this.model.annot(id);
|
|
if (a) after.set(id, structuredClone(a));
|
|
}
|
|
// Put every mark back before re-applying through the model, so the
|
|
// journal's "before" is the state the drag actually started from.
|
|
for (const [id, orig] of d.origs) {
|
|
const a = this.model.annot(id);
|
|
if (a) restoreExactly(a, orig);
|
|
}
|
|
this.model.moveAnnots([...after.keys()], (a) => {
|
|
const to = after.get(a.id);
|
|
const patch = {};
|
|
for (const k of Object.keys(to)) {
|
|
if (k !== "id" && k !== "page" && k !== "kind") patch[k] = to[k];
|
|
}
|
|
return patch;
|
|
});
|
|
}
|
|
|
|
_commitLiveEdit(a, orig) {
|
|
const after = structuredClone(a);
|
|
restoreExactly(a, orig);
|
|
const patch = {};
|
|
for (const k of Object.keys(after)) {
|
|
if (k !== "id" && k !== "page" && k !== "kind") patch[k] = after[k];
|
|
}
|
|
this.model.moveAnnot(a.id, patch);
|
|
}
|
|
|
|
// The mark a drag currently describes. `final` rejects degenerate ones so a
|
|
// stray click does not leave an invisible zero-size rectangle behind.
|
|
_previewAnnot(d, final = false) {
|
|
const common = { page: d.uid, color: this.color, width: this.width };
|
|
switch (d.kind) {
|
|
case "pen": {
|
|
if (final && d.pts.length < 2) return null;
|
|
return { kind: "pen", ...common, pts: d.pts.slice() };
|
|
}
|
|
case "arrow": case "line": {
|
|
if (final && !d.moved) return null;
|
|
return { kind: d.kind, ...common, x1: d.x0, y1: d.y0, x2: d.x, y2: d.y };
|
|
}
|
|
case "rect": case "ellipse": case "redact": {
|
|
const b = normBox(d.x0, d.y0, d.x, d.y);
|
|
if (final && (b.w < 2 || b.h < 2)) return null;
|
|
if (d.kind === "redact") return { kind: "redact", page: d.uid, ...b };
|
|
return { kind: d.kind, ...common, ...b, fill: !!this.fill, opacity: this.fillOpacity ?? 0.25 };
|
|
}
|
|
default: return null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Everything needed to replace one run of the document's text, in the
|
|
* coordinates the rest of the editor speaks.
|
|
*
|
|
* The text layer is the source: pdf.js has already placed a span over every
|
|
* run, and its `--font-height` carries the run's size in unscaled PDF points
|
|
* — so the size survives zooming, which reading it off the rendered box
|
|
* would not.
|
|
*/
|
|
describeRun(span, uid) {
|
|
const ov = this.strip.overlayFor(uid);
|
|
const view = this.strip.views.get(uid);
|
|
if (!ov?.viewport || !view) return null;
|
|
const pr = view.pv.div.getBoundingClientRect();
|
|
const r = span.getBoundingClientRect();
|
|
if (r.width < 1 || r.height < 1) return null;
|
|
const [ax, ay] = ov.toPdf(r.left - pr.left, r.bottom - pr.top);
|
|
const [bx, by] = ov.toPdf(r.right - pr.left, r.top - pr.top);
|
|
const box = normBox(ax, ay, bx, by);
|
|
const declared = parseFloat(getComputedStyle(span).getPropertyValue("--font-height"));
|
|
const size = Number.isFinite(declared) && declared > 0 ? declared : box.h * 0.8;
|
|
// PDF text sits on a baseline; the span's top is the top of the em box,
|
|
// so the baseline hangs one ascent below it.
|
|
const baseline = box.y + box.h - size * ASCENT;
|
|
// The span does NOT enclose the glyphs. pdf.js sizes it to the em box, so
|
|
// every descender — the tail of a y, a comma — falls below it, and a cover
|
|
// cut to the span leaves a row of little hooks showing under the
|
|
// replacement. Reach below the baseline far enough to take them, and a
|
|
// hair above and to the sides for accents and side bearings.
|
|
const bottom = Math.min(box.y, baseline - size * DESCENDER);
|
|
const top = box.y + box.h + size * 0.06;
|
|
return {
|
|
uid,
|
|
text: span.textContent,
|
|
box: { x: box.x - 0.6, y: bottom, w: box.w + 1.2, h: top - bottom },
|
|
size,
|
|
baseline,
|
|
clientRect: { left: r.left, top: r.top, width: r.width, height: r.height },
|
|
};
|
|
}
|
|
|
|
/** Commit a replaced run as a mark, selected and ready to nudge. */
|
|
replaceRun(run, props) {
|
|
const a = this.model.addAnnot({
|
|
kind: "textedit", page: run.uid,
|
|
x: run.box.x, y: run.box.y, w: run.box.w, h: run.box.h,
|
|
baseline: run.baseline,
|
|
text: props.text, size: props.size ?? run.size,
|
|
color: props.color || "#000000",
|
|
cover: props.cover || "#ffffff",
|
|
bold: !!props.bold, italic: !!props.italic,
|
|
});
|
|
this._afterStamp(a);
|
|
return a;
|
|
}
|
|
|
|
// ---- text markup --------------------------------------------------
|
|
// Take the live selection's client rects, drop them onto whichever page each
|
|
// one sits on, and convert to user space. A selection spanning a page break
|
|
// therefore produces one mark per page, which is also what the PDF format
|
|
// wants. Highlight, underline and strikeout differ only in `kind`.
|
|
_commitTextMarkup() {
|
|
const kind = this.tool;
|
|
const sel = window.getSelection();
|
|
if (!sel || sel.isCollapsed || sel.rangeCount === 0) return;
|
|
const byPage = new Map();
|
|
for (let i = 0; i < sel.rangeCount; i++) {
|
|
for (const cr of sel.getRangeAt(i).getClientRects()) {
|
|
if (cr.width < 0.5 || cr.height < 0.5) continue;
|
|
const hit = this.strip.pageAt(cr.left + cr.width / 2, cr.top + cr.height / 2);
|
|
if (!hit) continue;
|
|
const ov = this.strip.overlayFor(hit.uid);
|
|
if (!ov || !ov.viewport) continue;
|
|
const r = this.strip.views.get(hit.uid).pv.div.getBoundingClientRect();
|
|
const [ax, ay] = ov.toPdf(cr.left - r.left, cr.top - r.top);
|
|
const [bx, by] = ov.toPdf(cr.right - r.left, cr.bottom - r.top);
|
|
const box = normBox(ax, ay, bx, by);
|
|
if (box.w < 0.5 || box.h < 0.5) continue;
|
|
if (!byPage.has(hit.uid)) byPage.set(hit.uid, []);
|
|
byPage.get(hit.uid).push(box);
|
|
}
|
|
}
|
|
if (!byPage.size) return;
|
|
let last = null;
|
|
for (const [uid, rects] of byPage) {
|
|
last = this.model.addAnnot({
|
|
kind, page: uid, color: this.color,
|
|
opacity: kind === "highlight" ? 0.38 : 1,
|
|
width: kind === "highlight" ? undefined : Math.max(0.8, this.width * 0.55),
|
|
rects: mergeRows(rects),
|
|
});
|
|
}
|
|
sel.removeAllRanges();
|
|
this._setSelected(last ? last.id : null);
|
|
this.host.onChange?.();
|
|
}
|
|
|
|
// ---- stamps -------------------------------------------------------
|
|
/** Place a new text mark, or rewrite an existing one, as one undo step. */
|
|
/**
|
|
* The colour to write WORDS in.
|
|
*
|
|
* The palette's default is highlighter yellow, which is right for a
|
|
* highlight and unreadable as text on a white page. A signature already
|
|
* made this swap; text was left behind, and you now watch yourself type
|
|
* in it, so it is impossible to miss.
|
|
*/
|
|
get ink() { return this.color === "#ffd400" ? "#1a1f2b" : this.color; }
|
|
|
|
placeText({ uid, x, y }, props) {
|
|
if (!String(props.text || "").trim()) return null;
|
|
const a = this.model.addAnnot({
|
|
kind: "text", page: uid, color: this.ink, x, y,
|
|
size: props.size, text: props.text, bold: !!props.bold, italic: !!props.italic,
|
|
});
|
|
this._afterStamp(a);
|
|
return a;
|
|
}
|
|
|
|
updateText(id, props) {
|
|
const a = this.model.annot(id);
|
|
if (!a) return null;
|
|
if (!String(props.text || "").trim()) { this.deleteSelected(); return null; }
|
|
this.model.moveAnnot(id, {
|
|
text: props.text, size: props.size, bold: !!props.bold, italic: !!props.italic,
|
|
});
|
|
delete a._w; // width changed; let the renderer re-measure
|
|
this._setSelected(id);
|
|
this.host.onChange?.();
|
|
return a;
|
|
}
|
|
|
|
async _placeSignature(uid, x, y) {
|
|
// Which signature is decided when the tool is armed, not on every click,
|
|
// so placing three initials in three boxes is three clicks. This is only
|
|
// the fallback for a tool armed with nothing chosen yet.
|
|
let sig = this.host.signature();
|
|
if (!sig) {
|
|
sig = await this.host.chooseSignature?.();
|
|
if (!sig) return;
|
|
}
|
|
const w = SIG_WIDTH_PT;
|
|
const h = w * (sig.aspect || 0.34);
|
|
const a = this.model.addAnnot({
|
|
// The ink the signature was drawn in, not whatever swatch is armed.
|
|
kind: "signature", page: uid, color: sig.color || this.ink,
|
|
width: 1.6, x, y: y - h, w, h, strokes: sig.strokes,
|
|
});
|
|
this._afterStamp(a);
|
|
}
|
|
|
|
// Drop back to select with the new mark live, so it can be nudged, resized
|
|
// or deleted straight away and a second click does not stamp a duplicate.
|
|
_afterStamp(a) {
|
|
this.host.selectTool?.("select");
|
|
this._setSelected(a.id);
|
|
this.host.onChange?.();
|
|
}
|
|
|
|
/** Bounds of the current selection, for the status line. */
|
|
selectedBounds() {
|
|
const a = this.model.annot(this.selected);
|
|
return a ? boundsOf(a) : null;
|
|
}
|
|
}
|
|
|
|
// Client rects for a text selection come one per text run, so a single
|
|
// highlighted line arrives as a dozen slivers. Merging the ones that share a
|
|
// baseline turns them back into one band per line — fewer objects in the saved
|
|
// file, and no seams where two slivers overlap at 38% opacity.
|
|
function mergeRows(rects) {
|
|
const rows = [];
|
|
for (const r of rects.slice().sort((a, b) => b.y - a.y || a.x - b.x)) {
|
|
const row = rows.find((q) => Math.abs((q.y + q.h / 2) - (r.y + r.h / 2)) < Math.min(q.h, r.h) * 0.5);
|
|
if (!row) { rows.push({ ...r }); continue; }
|
|
const x0 = Math.min(row.x, r.x), x1 = Math.max(row.x + row.w, r.x + r.w);
|
|
const y0 = Math.min(row.y, r.y), y1 = Math.max(row.y + row.h, r.y + r.h);
|
|
row.x = x0; row.w = x1 - x0; row.y = y0; row.h = y1 - y0;
|
|
}
|
|
return rows;
|
|
}
|