admin.suherdy/sign_image_field
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feat: Implement shared lazy loading for sign images by introducing a mixin applied to both PDF and Signable iframes, and remove the ResizeObserver for image field sizing.

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Suherdy Yacob 2026-03-16 14:51:42 +07:00
parent 70543a9e18
commit 0f9d0e02e6
1 changed files with 61 additions and 58 deletions
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119
static/src/js/sign_image_upload.js
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@ -1,9 +1,63 @@
/** @odoo-module **/
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";
/**
* Shared logic for triggered lazy loading of images.
* This ensures that when a sign item element is created or scrolled into view,
* its image is loaded from the data-src attribute.
*/
const lazyLoadMixin = {
_triggerLazyLoad(el) {
if (!el) return;
const lazyImg = el.querySelector('.o_sign_image_lazy');
if (lazyImg && lazyImg.dataset.src) {
const currentSrc = lazyImg.getAttribute('src');
// Check if it's currently showing the transparent placeholder
if (!currentSrc || currentSrc.startsWith('data:image/gif')) {
lazyImg.src = lazyImg.dataset.src;
lazyImg.onload = () => {
lazyImg.classList.remove('o_sign_image_loading');
el.classList.remove('o_sign_image_loading_container');
lazyImg.style.opacity = 1;
};
}
}
},
refreshSignItemsForPage(page) {
super.refreshSignItemsForPage(page);
if (this.signItems && this.signItems[page]) {
for (const id in this.signItems[page]) {
const item = this.signItems[page][id];
if (item && item.el) {
this._triggerLazyLoad(item.el);
}
}
}
}
};
// 1. Patch the base PDFIframe for shared lazy-loading logic (covers read-only views)
patch(PDFIframe.prototype, {
...lazyLoadMixin,
// We also hook into enableCustom to trigger lazy load for initial items
enableCustom(signItem) {
super.enableCustom(signItem);
if (signItem.data.type === 'image') {
this._triggerLazyLoad(signItem.el);
}
}
});
// 2. Patch SignablePDFIframe for upload handlers and specific behaviors (covers signing views)
patch(SignablePDFIframe.prototype, {
// Note: Mixin methods are already inherited if not overwritten,
// but SignablePDFIframe might need its own hooks.
enableCustom(signItem) {
super.enableCustom(signItem);
if (signItem.data.type === 'image') {
@ -13,33 +67,23 @@ patch(SignablePDFIframe.prototype, {
// Add data-type attribute for CSS targeting
el.setAttribute('data-type', 'image');
// Function to adjust font size based on container dimensions
// Initial font size adjustment for placeholder text
const adjustFontSize = () => {
const placeholder = el.querySelector('.o_placeholder');
if (placeholder) {
const containerHeight = el.offsetHeight;
const containerWidth = el.offsetWidth;
const minDimension = Math.min(containerHeight, containerWidth);
const minDimension = Math.min(el.offsetHeight, el.offsetWidth);
const fontSize = Math.max(10, Math.min(16, minDimension * 0.4));
placeholder.style.fontSize = fontSize + 'px !important';
placeholder.style.lineHeight = '1';
}
};
// Initial font size adjustment
setTimeout(adjustFontSize, 100);
// Watch for size changes
if (window.ResizeObserver) {
const resizeObserver = new ResizeObserver(adjustFontSize);
resizeObserver.observe(el);
}
// Upload implementation
const input = el.querySelector('.o_sign_image_upload_input');
if (input) {
el.addEventListener('click', (e) => {
if (this.readonly || (data.responsible > 0 && data.responsible !== this.currentRole)) return;
// Prevent recursive click if clicking the input itself bubbles up
if (e.target !== input) {
input.click();
}
@ -56,33 +100,26 @@ patch(SignablePDFIframe.prototype, {
const canvas = document.createElement('canvas');
let width = img.width;
let height = img.height;
const MAX_SIZE = 1080;
if (width > height) {
if (width > MAX_SIZE) {
height *= MAX_SIZE / width;
width = MAX_SIZE;
}
} else {
if (height > MAX_SIZE) {
width *= MAX_SIZE / height;
height = MAX_SIZE;
}
} else if (height > MAX_SIZE) {
width *= MAX_SIZE / height;
height = MAX_SIZE;
}
canvas.width = width;
canvas.height = height;
const ctx = canvas.getContext('2d');
ctx.drawImage(img, 0, 0, width, height);
const compressedDataUrl = canvas.toDataURL('image/jpeg', 0.7);
// Update state and element
data.value = compressedDataUrl;
el.dataset.value = compressedDataUrl;
// Force immediate display update
const placeholder = el.querySelector('.o_placeholder');
if (placeholder) placeholder.remove();
@ -97,7 +134,6 @@ patch(SignablePDFIframe.prototype, {
}
existingImg.src = compressedDataUrl;
// Notify Odoo of the value change
if (this.handleInput) {
this.handleInput();
}
@ -108,44 +144,11 @@ patch(SignablePDFIframe.prototype, {
});
}
// Performance Fix: Trigger lazy load if already visible
// Immediately trigger load if value exists
this._triggerLazyLoad(el);
}
},
refreshSignItemsForPage(page) {
super.refreshSignItemsForPage(page);
if (this.signItems && this.signItems[page]) {
for (const id in this.signItems[page]) {
const item = this.signItems[page][id];
if (item && item.el) {
this._triggerLazyLoad(item.el);
}
}
}
},
/**
* Triggers the load of a lazy-loaded image if it has a data-src attribute
* @param {HTMLElement} el
*/
_triggerLazyLoad(el) {
if (!el) return;
const lazyImg = el.querySelector('.o_sign_image_lazy');
if (lazyImg && lazyImg.dataset.src) {
const currentSrc = lazyImg.getAttribute('src');
// If src is still the transparent placeholder gif or empty, load the real image
if (!currentSrc || currentSrc.startsWith('data:image/gif')) {
lazyImg.src = lazyImg.dataset.src;
lazyImg.onload = () => {
lazyImg.classList.remove('o_sign_image_loading');
el.classList.remove('o_sign_image_loading_container');
lazyImg.style.opacity = 1;
};
}
}
},
getSignatureValueFromElement(item) {
if (item.data.type === 'image') {
return item.el.dataset.value || item.data.value || false;