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refactor: Stabilize image field patching in Odoo Sign to ensure proper inheritance and improve lazy loading and upload handling.

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This commit is contained in:
Suherdy Yacob 2026-03-16 16:12:54 +07:00
parent f119a32b0e
commit 3708869870
1 changed files with 32 additions and 53 deletions
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85
static/src/js/sign_image_upload.js
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@ -4,20 +4,20 @@ import { patch } from "@web/core/utils/patch";
import { PDFIframe } from "@sign/components/sign_request/PDF_iframe";
import { SignablePDFIframe } from "@sign/components/sign_request/signable_PDF_iframe";
console.log("Sign Image Field: Loading custom patches...");
console.log("Sign Image Field: Initializing stabilized patches...");
/**
* Robust lazy loading trigger for image sign items.
* Shared utility for lazy loading image fields.
*/
const triggerLazyLoad = (el) => {
if (!el) return;
const lazyImg = el.querySelector('.o_sign_image_lazy');
if (lazyImg && (lazyImg.dataset.src || lazyImg.src)) {
const targetSrc = lazyImg.dataset.src || lazyImg.src;
// Check if it's currently showing the transparent placeholder
const currentSrc = lazyImg.getAttribute('src');
// Only trigger if we haven't loaded the real image yet
if (!currentSrc || currentSrc.startsWith('data:image/gif') || currentSrc === '') {
console.log("Sign Image Field: Loading image data for", el);
lazyImg.src = targetSrc;
lazyImg.onload = () => {
lazyImg.classList.remove('o_sign_image_loading');
@ -25,7 +25,7 @@ const triggerLazyLoad = (el) => {
lazyImg.style.opacity = 1;
};
} else {
// Already has a real src, just ensure loading classes are gone
// Cleanup in case of re-rendering
lazyImg.classList.remove('o_sign_image_loading');
el.classList.remove('o_sign_image_loading_container');
lazyImg.style.opacity = 1;
@ -34,13 +34,13 @@ const triggerLazyLoad = (el) => {
};
/**
* Setup IntersectionObserver for an element.
* Shared logic for setting up an observer on any image field.
*/
const setupLazyObserver = (iframeInstance, el) => {
const setupLazyObserver = (el) => {
if (!el) return;
// Safety fallback: Always load after 2 seconds regardless of visibility
// This handles cases where IntersectionObserver fails in iframes or remote bundling issues
// Immediate check + safety fallback (2 seconds)
// This ensures images load even if IntersectionObserver is throttled
setTimeout(() => triggerLazyLoad(el), 2000);
if (window.IntersectionObserver) {
@ -51,62 +51,48 @@ const setupLazyObserver = (iframeInstance, el) => {
observer.disconnect();
}
});
}, {
rootMargin: '200px'
});
}, { rootMargin: '200px' });
observer.observe(el);
} else {
triggerLazyLoad(el);
}
};
// 1. Patch PDFIframe (Base class)
// We avoid calling 'super' here because PDFIframe is a base class and has no parent.
// Odoo 19's patch system might misbehave with 'super' in base class prototype patches.
const pdfIframePatch = {
// 1. Patch PDFIframe (Used for observers and read-only views)
patch(PDFIframe.prototype, {
enableCustom(signItem) {
console.log("Sign Image Field: PDFIframe.enableCustom triggered for", signItem.data.type);
if (signItem && signItem.data && signItem.data.type === 'image') {
setupLazyObserver(this, signItem.el);
// ALWAYS call the base implementation FIRST to preserve Odoo behavior
super.enableCustom(...arguments);
// OUR LOGIC: Setup lazy loading if it's an image
if (signItem && signItem.data && signItem.data.type === 'image' && signItem.el) {
setupLazyObserver(signItem.el);
}
// Instead of super.enableCustom(signItem), we check if there's an ORIGINAL to call
// Normally for PDFIframe it's an empty function.
}
};
});
// Use a safe patch wrapper to ensure we don't break the prototype
try {
patch(PDFIframe.prototype, pdfIframePatch);
} catch (e) {
console.error("Sign Image Field: Failed to patch PDFIframe.prototype", e);
}
// 2. Patch SignablePDFIframe (Subclass)
const signablePDFIframePatch = {
// 2. Patch SignablePDFIframe (Used for active signers)
patch(SignablePDFIframe.prototype, {
enableCustom(signItem) {
console.log("Sign Image Field: SignablePDFIframe.enableCustom triggered for", signItem.data.type);
// Setup observer BEFORE role checks so it works for observers/read-only too
if (signItem && signItem.data && signItem.data.type === 'image') {
setupLazyObserver(this, signItem.el);
}
// Call base implementation
super.enableCustom(signItem);
// ALWAYS call the base implementation FIRST to preserve text/signature population
super.enableCustom(...arguments);
// OUR LOGIC: Setup lazy loading and upload support
if (signItem && signItem.data && signItem.data.type === 'image' && signItem.el) {
const el = signItem.el;
const data = signItem.data;
// Re-apply responsible check for upload logic only
// Shared lazy loading observer
setupLazyObserver(el);
// Only attach upload listeners if this person is responsible and not readonly
if (this.readonly || (data.responsible > 0 && data.responsible !== this.currentRole)) {
return;
}
el.setAttribute('data-type', 'image');
// Upload implementation
const input = el.querySelector('.o_sign_image_upload_input');
if (input) {
// Remove any previous listeners if possible (though patch should handle it)
el.addEventListener('click', (e) => {
if (e.target !== input) {
input.click();
@ -134,7 +120,6 @@ const signablePDFIframePatch = {
width *= MAX_SIZE / height;
height = MAX_SIZE;
}
canvas.width = width;
canvas.height = height;
const ctx = canvas.getContext('2d');
@ -174,12 +159,6 @@ const signablePDFIframePatch = {
if (item.data.type === 'image') {
return item.el.dataset.value || item.data.value || false;
}
return super.getSignatureValueFromElement(item);
return super.getSignatureValueFromElement(...arguments);
}
};
try {
patch(SignablePDFIframe.prototype, signablePDFIframePatch);
} catch (e) {
console.error("Sign Image Field: Failed to patch SignablePDFIframe.prototype", e);
}
});