diff --git a/src/frontend/flask_app/static/js/image-crop.js b/src/frontend/flask_app/static/js/image-crop.js new file mode 100644 index 0000000..04f32b7 --- /dev/null +++ b/src/frontend/flask_app/static/js/image-crop.js @@ -0,0 +1,293 @@ +/** + * image-crop.js — ritaglio di immagine/PDF prima dell'upload (#56). + * + * Cosa fa: ImageCrop.open(file) apre una modale con un rettangolo di ritaglio + * trascinabile e ridimensionabile (mouse e touch, Pointer Events). Per un PDF + * rasterizza la pagina scelta con pdf.js (>= 2000 px sul lato lungo). + * Risolve: Blob PNG del ritaglio (a piena risoluzione) | il file originale + * ("Usa originale") | null ("Annulla"). + * Come si usa: ImageCrop.configure({pdfSrc, workerSrc, labels}) una volta dal + * template (URL di vendor/pdf e stringhe tradotte), poi `await ImageCrop.open(file)`. + * Dipendenze: nessuna obbligatoria. pdf.js (gia' vendorizzato) viene caricato + * al bisogno solo per i PDF; il ritaglio usa un canvas 2D semplice invece di + * fabric.js perche' serve solo un rettangolo, non un editor di oggetti. + */ +(function (global) { + 'use strict'; + + var cfg = { + pdfSrc: '', + workerSrc: '', + labels: { + title: 'Ritaglia immagine', + page: 'Pagina', + hint: 'Trascina il rettangolo o i suoi bordi per scegliere la zona da tenere.', + pdfNote: 'Un PDF ritagliato viene salvato come immagine PNG.', + confirm: 'Conferma ritaglio', + original: 'Usa originale', + cancel: 'Annulla', + loading: 'Caricamento...', + error: 'Impossibile aprire il file per il ritaglio.' + } + }; + + var MIN_SIDE = 16; // lato minimo del ritaglio, in px immagine + var HANDLE = 12; // raggio di presa delle maniglie, in px schermo + var PDF_MIN_LONG = 2000; // lato lungo minimo del raster PDF + var PDF_MAX_LONG = 6000; // tetto per non esaurire la memoria del canvas + + function configure(opts) { + if (!opts) return; + if (opts.pdfSrc) cfg.pdfSrc = opts.pdfSrc; + if (opts.workerSrc) cfg.workerSrc = opts.workerSrc; + if (opts.labels) for (var k in opts.labels) cfg.labels[k] = opts.labels[k]; + } + + function isPdf(file) { + return file.type === 'application/pdf' || /\.pdf$/i.test(file.name || ''); + } + + function loadPdfJs() { + if (global.pdfjsLib) return Promise.resolve(global.pdfjsLib); + if (!cfg.pdfSrc) return Promise.reject(new Error('pdf.js non configurato')); + return new Promise(function (resolve, reject) { + var s = document.createElement('script'); + s.src = cfg.pdfSrc; + s.onload = function () { resolve(global.pdfjsLib); }; + s.onerror = function () { reject(new Error('pdf.js non caricato')); }; + document.head.appendChild(s); + }); + } + + function readImage(file) { + return new Promise(function (resolve, reject) { + var url = URL.createObjectURL(file); + var img = new Image(); + img.onload = function () { URL.revokeObjectURL(url); resolve(img); }; + img.onerror = function () { URL.revokeObjectURL(url); reject(new Error('immagine illeggibile')); }; + img.src = url; + }); + } + + function renderPdfPage(pdf, n) { + return pdf.getPage(n).then(function (page) { + var base = page.getViewport({ scale: 1 }); + var long = Math.max(base.width, base.height); + var scale = Math.min(PDF_MAX_LONG / long, Math.max(2, PDF_MIN_LONG / long)); + var vp = page.getViewport({ scale: scale }); + var c = document.createElement('canvas'); + c.width = Math.round(vp.width); + c.height = Math.round(vp.height); + return page.render({ canvasContext: c.getContext('2d'), viewport: vp }).promise + .then(function () { return c; }); + }); + } + + function el(tag, cls, text) { + var e = document.createElement(tag); + if (cls) e.className = cls; + if (text) e.textContent = text; + return e; + } + + function open(file) { + var L = cfg.labels; + return new Promise(function (resolve) { + var src = null; // Image o canvas sorgente a piena risoluzione + var rect = null; // {x,y,w,h} in px immagine + var pdfDoc = null; + var closed = false; + + // ---- DOM (stile Maker: variabili CSS del tema + classi btn gia' presenti) ---- + var overlay = el('div', 'fixed inset-0 z-[100] flex items-center justify-center p-3 bg-black/60'); + overlay.setAttribute('role', 'dialog'); + overlay.setAttribute('aria-modal', 'true'); + var box = el('div', 'rounded-xl shadow-xl flex flex-col w-full max-w-4xl max-h-full'); + box.style.cssText = 'background:var(--bg-primary,#fff);color:var(--text-primary,#111);border:1px solid var(--border-color,#ddd);'; + var head = el('div', 'flex items-center justify-between gap-3 px-4 py-3'); + head.appendChild(el('h3', 'font-semibold text-sm', L.title)); + var pageWrap = el('label', 'text-xs items-center gap-2'); + pageWrap.style.display = 'none'; + pageWrap.appendChild(document.createTextNode(L.page + ' ')); + var pageSel = el('select', 'tmf-input text-xs'); + pageSel.style.width = 'auto'; + pageWrap.appendChild(pageSel); + head.appendChild(pageWrap); + var body = el('div', 'px-4 flex-1 min-h-0 overflow-auto flex justify-center'); + var status = el('p', 'text-xs py-6', L.loading); + body.appendChild(status); + var canvas = el('canvas'); + canvas.style.cssText = 'max-width:100%;max-height:65vh;touch-action:none;cursor:crosshair;display:none;'; + body.appendChild(canvas); + var foot = el('div', 'px-4 py-3 flex flex-wrap items-center justify-between gap-2'); + var note = el('p', 'text-xs'); + note.style.color = 'var(--text-muted,#666)'; + note.textContent = L.hint + (isPdf(file) ? ' ' + L.pdfNote : ''); + var btns = el('div', 'flex gap-2'); + var bCancel = el('button', 'btn btn-secondary text-xs', L.cancel); + var bOrig = el('button', 'btn btn-secondary text-xs', L.original); + var bOk = el('button', 'btn btn-primary text-xs', L.confirm); + [bCancel, bOrig, bOk].forEach(function (b) { b.type = 'button'; btns.appendChild(b); }); + bOk.disabled = true; + foot.appendChild(note); + foot.appendChild(btns); + box.appendChild(head); box.appendChild(body); box.appendChild(foot); + overlay.appendChild(box); + document.body.appendChild(overlay); + + function onKey(e) { if (e.key === 'Escape') finish(null); } + function finish(value) { + if (closed) return; + closed = true; + document.removeEventListener('keydown', onKey); + overlay.remove(); + resolve(value); + } + document.addEventListener('keydown', onKey); + bCancel.onclick = function () { finish(null); }; + bOrig.onclick = function () { finish(file); }; + bOk.onclick = function () { + if (!src || !rect) return; + var out = document.createElement('canvas'); + out.width = Math.round(rect.w); + out.height = Math.round(rect.h); + out.getContext('2d').drawImage(src, Math.round(rect.x), Math.round(rect.y), + out.width, out.height, 0, 0, out.width, out.height); + out.toBlob(function (blob) { finish(blob || file); }, 'image/png'); + }; + + // ---- disegno ---- + function sw() { return src.width || src.naturalWidth; } + function sh() { return src.height || src.naturalHeight; } + function handlePoints(r) { + var mx = r.x + r.w / 2, my = r.y + r.h / 2, ex = r.x + r.w, ey = r.y + r.h; + return [ + { n: 'nw', x: r.x, y: r.y }, { n: 'n', x: mx, y: r.y }, { n: 'ne', x: ex, y: r.y }, + { n: 'e', x: ex, y: my }, { n: 'se', x: ex, y: ey }, { n: 's', x: mx, y: ey }, + { n: 'sw', x: r.x, y: ey }, { n: 'w', x: r.x, y: my } + ]; + } + function draw() { + var ctx = canvas.getContext('2d'); + ctx.drawImage(src, 0, 0, canvas.width, canvas.height); + var r = rect; // il canvas di visualizzazione ha la risoluzione della sorgente + // velo scuro fuori dal ritaglio (4 fasce) + ctx.fillStyle = 'rgba(0,0,0,0.5)'; + ctx.fillRect(0, 0, canvas.width, r.y); + ctx.fillRect(0, r.y + r.h, canvas.width, canvas.height - r.y - r.h); + ctx.fillRect(0, r.y, r.x, r.h); + ctx.fillRect(r.x + r.w, r.y, canvas.width - r.x - r.w, r.h); + ctx.strokeStyle = '#3b82f6'; + ctx.lineWidth = Math.max(2, canvas.width / 400); + ctx.strokeRect(r.x, r.y, r.w, r.h); + ctx.fillStyle = '#3b82f6'; + var hs = Math.max(8, canvas.width / 80); + handlePoints(r).forEach(function (p) { ctx.fillRect(p.x - hs / 2, p.y - hs / 2, hs, hs); }); + } + function setSource(s) { + src = s; + canvas.width = sw(); + canvas.height = sh(); + rect = { x: 0, y: 0, w: sw(), h: sh() }; // all'inizio: tutta l'immagine + status.style.display = 'none'; + canvas.style.display = 'block'; + bOk.disabled = false; + draw(); + } + + // ---- interazione ---- + var drag = null; + function toImg(e) { + var b = canvas.getBoundingClientRect(); + return { x: (e.clientX - b.left) * sw() / b.width, y: (e.clientY - b.top) * sh() / b.height, + k: sw() / b.width }; // k = px immagine per px schermo + } + function hit(p) { + var best = null, bd = HANDLE * p.k; + handlePoints(rect).forEach(function (h) { + var d = Math.max(Math.abs(h.x - p.x), Math.abs(h.y - p.y)); + if (d <= bd) { bd = d; best = h.n; } + }); + if (best) return best; + if (p.x > rect.x && p.x < rect.x + rect.w && p.y > rect.y && p.y < rect.y + rect.h) return 'move'; + return 'new'; + } + function clamp(v, a, b) { return Math.max(a, Math.min(b, v)); } + canvas.addEventListener('pointerdown', function (e) { + if (!src) return; + var p = toImg(e); + var mode = hit(p); + drag = { mode: mode, sx: p.x, sy: p.y, r0: { x: rect.x, y: rect.y, w: rect.w, h: rect.h } }; + if (mode === 'new') { // nuovo rettangolo: parte dal punto di tocco + drag.r0 = { x: clamp(p.x, 0, sw()), y: clamp(p.y, 0, sh()), w: 0, h: 0 }; + } + canvas.setPointerCapture(e.pointerId); + e.preventDefault(); + }); + canvas.addEventListener('pointermove', function (e) { + if (!src) return; + var p = toImg(e); + if (!drag) { + var m = hit(p); + canvas.style.cursor = m === 'move' ? 'move' : m === 'new' ? 'crosshair' + : (m.length === 2 ? (m === 'nw' || m === 'se' ? 'nwse-resize' : 'nesw-resize') + : (m === 'n' || m === 's' ? 'ns-resize' : 'ew-resize')); + return; + } + var dx = p.x - drag.sx, dy = p.y - drag.sy, r0 = drag.r0, W = sw(), H = sh(); + if (drag.mode === 'move') { + rect.x = clamp(r0.x + dx, 0, W - r0.w); + rect.y = clamp(r0.y + dy, 0, H - r0.h); + } else { + var x1 = r0.x, y1 = r0.y, x2 = r0.x + r0.w, y2 = r0.y + r0.h, m2 = drag.mode; + if (m2 === 'new') { x2 = clamp(p.x, 0, W); y2 = clamp(p.y, 0, H); } + else { + if (m2.indexOf('w') >= 0) x1 = clamp(r0.x + dx, 0, x2 - MIN_SIDE); + if (m2.indexOf('e') >= 0) x2 = clamp(x2 + dx, x1 + MIN_SIDE, W); + if (m2.indexOf('n') >= 0) y1 = clamp(r0.y + dy, 0, y2 - MIN_SIDE); + if (m2.indexOf('s') >= 0) y2 = clamp(y2 + dy, y1 + MIN_SIDE, H); + } + rect = { x: Math.min(x1, x2), y: Math.min(y1, y2), w: Math.abs(x2 - x1), h: Math.abs(y2 - y1) }; + } + bOk.disabled = rect.w < MIN_SIDE || rect.h < MIN_SIDE; // ritaglio troppo piccolo: non confermabile + draw(); + e.preventDefault(); + }); + function up() { drag = null; } + canvas.addEventListener('pointerup', up); + canvas.addEventListener('pointercancel', up); + + // ---- caricamento sorgente ---- + function fail(err) { + console.error('ImageCrop:', err); + status.style.display = ''; + status.textContent = L.error; + canvas.style.display = 'none'; + bOk.disabled = true; + } + if (isPdf(file)) { + loadPdfJs().then(function (lib) { + if (cfg.workerSrc) lib.GlobalWorkerOptions.workerSrc = cfg.workerSrc; + return file.arrayBuffer().then(function (buf) { return lib.getDocument({ data: buf }).promise; }); + }).then(function (pdf) { + pdfDoc = pdf; + if (pdf.numPages > 1) { + for (var i = 1; i <= pdf.numPages; i++) { + var o = el('option', '', String(i)); o.value = String(i); pageSel.appendChild(o); + } + pageWrap.style.display = 'flex'; + } + return renderPdfPage(pdf, 1); + }).then(setSource).catch(fail); + pageSel.onchange = function () { + bOk.disabled = true; + renderPdfPage(pdfDoc, parseInt(pageSel.value, 10)).then(setSource).catch(fail); + }; + } else { + readImage(file).then(setSource).catch(fail); + } + }); + } + + global.ImageCrop = { open: open, configure: configure }; +})(window); diff --git a/src/frontend/flask_app/templates/maker/recipe_editor.html b/src/frontend/flask_app/templates/maker/recipe_editor.html index a4a58fb..10950b1 100644 --- a/src/frontend/flask_app/templates/maker/recipe_editor.html +++ b/src/frontend/flask_app/templates/maker/recipe_editor.html @@ -503,6 +503,32 @@ {% endblock %} {% block extra_js %} + + + +