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Improve popover placement and style support (#1307)

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Jaifroid 2025-02-17 08:41:59 +00:00 committed by GitHub
parent 47db0e7efd
commit 2096a8cf82
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1 changed files with 56 additions and 19 deletions
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www/js/lib/popovers.js
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@ -185,9 +185,9 @@ function getImageHTMLFromNode (node, baseURL, pathPrefix) {
* @param {Boolean} dark An optional parameter to adjust the background colour for dark themes (generally not needed for inversion-based themes)
*/
function attachKiwixPopoverCss (doc, dark) {
const colour = dark && !/invert/i.test(params.cssTheme) ? 'darkgray' : 'black';
const backgroundColour = dark && !/invert/i.test(params.cssTheme) ? '#111' : '#ebf4fb';
const borderColour = dark ? 'darkslategray' : 'skyblue';
const colour = dark && !/invert/i.test(params.cssTheme) ? 'lightgray' : 'black';
const backgroundColour = dark && !/invert/i.test(params.cssTheme) ? '#121e1e' : '#ebf4fb';
const borderColour = 'skyblue !important';
const cssLink = document.createElement('link');
doc.head.appendChild(cssLink);
// DEV: Firefox OS blocks loading stylesheet files into iframe DOM content even if it is same origin, so we are forced to insert a style element instead
@ -211,6 +211,7 @@ function attachKiwixPopoverCss (doc, dark) {
/* add fade-in transition */
opacity: 0;
transition: opacity 0.3s;
z-index: 2;
}
.kiwixtooltip img {
@ -339,12 +340,17 @@ function createNewKiwixPopoverCointainer (win, anchor, event) {
const linkHref = anchor.getAttribute('href');
const currentDocument = win.document;
div.popoverisloading = true;
const screenWidth = win.innerWidth - 40;
const zoomSupported = 'zoom' in currentDocument.documentElement.style;
const zoomIsSet = zoomSupported && currentDocument.documentElement.style.zoom;
// We initially exempt Safari, becasue the zoom factor is only applied to horizontal positioning, and we'll deal with that later
let zoomFactor = zoomIsSet && !isSafari() ? currentDocument.documentElement.style.zoom : 1;
// Account for zoom when calculating available screen width
const screenWidth = (win.innerWidth - 40) / zoomFactor;
const screenHeight = document.documentElement.clientHeight;
let margin = 40;
let divWidth = 512;
if (screenWidth <= divWidth) {
divWidth = screenWidth;
// Base width scaled by zoom factor
const divWidth = Math.min(512, screenWidth);
if (screenWidth <= 512) {
margin = 10;
}
// Check if we have restricted screen height
@ -360,38 +366,55 @@ function createNewKiwixPopoverCointainer (win, anchor, event) {
// DEV: We need to insert the div into the target document before we can obtain its computed dimensions accurately
currentDocument.body.appendChild(div);
// Calculate the position of the link that is being hovered
const linkRect = anchor.getBoundingClientRect();
const rect = anchor.getBoundingClientRect();
const linkRect = {
top: rect.top,
bottom: rect.bottom,
left: rect.left,
right: rect.right,
width: rect.width
};
// Note that since Chromium 128 getBoundingClientRect() now returns zoom-adjusted values, but if this is the case,
// then currentCSSZoom will be defined as well, so we can adjust for this. Note that UWP also requires adjustment.
if (/UWP/.test(params.appType) || 'MSBlobBuilder' in window || anchor.currentCSSZoom || isSafari()) {
linkRect.top = linkRect.top / zoomFactor;
linkRect.bottom = linkRect.bottom / zoomFactor;
linkRect.left = linkRect.left / zoomFactor;
linkRect.right = linkRect.right / zoomFactor;
linkRect.width = linkRect.width / zoomFactor;
}
// Initially position the div 20px above the link
const spacing = 20;
let triangleDirection = 'top';
const divOffsetHeight = div.offsetHeight + 20;
const divOffsetHeight = div.offsetHeight + spacing;
let divRectY = linkRect.top - divOffsetHeight;
let triangleY = divHeight + 6;
// If we're less than half margin from the top, move the div below the link
if (divRectY < margin / 2) {
triangleDirection = 'bottom';
divRectY = linkRect.bottom + 20;
divRectY = linkRect.bottom + spacing;
triangleY = -16;
}
// Position it horizontally in relation to the pointer position
let divRectX, triangleX;
if (event.type === 'touchstart') {
divRectX = event.touches[0].clientX - divWidth / 2;
triangleX = event.touches[0].clientX - divRectX - 20;
triangleX = event.touches[0].clientX - divRectX - spacing;
} else if (event.type === 'focus') {
divRectX = linkRect.left + linkRect.width / 2 - divWidth / 2;
triangleX = linkRect.left + linkRect.width / 2 - divRectX - 20;
divRectX = linkRect.left * zoomFactor + linkRect.width / 2 - divWidth / 2;
triangleX = linkRect.left * zoomFactor + linkRect.width / 2 - divRectX - spacing;
} else {
divRectX = event.clientX - divWidth / 2;
triangleX = event.clientX - divRectX - 20;
triangleX = event.clientX - divRectX - spacing;
}
// If right edge of div is greater than margin from the right side of window, shift it to margin
if (divRectX + divWidth > screenWidth - margin) {
if (divRectX + divWidth * zoomFactor > screenWidth - margin) {
triangleX += divRectX;
divRectX = screenWidth - divWidth - margin;
divRectX = screenWidth - divWidth * zoomFactor - margin;
triangleX -= divRectX;
}
// If we're less than margin to the left, shift it to margin px from left
if (divRectX < margin) {
if (divRectX * zoomFactor < margin) {
triangleX += divRectX;
divRectX = margin;
triangleX -= divRectX;
@ -399,13 +422,21 @@ function createNewKiwixPopoverCointainer (win, anchor, event) {
// Adjust triangleX if necessary
if (triangleX < 10) triangleX = 10;
if (triangleX > divWidth - 10) triangleX = divWidth - 10;
// Adjust positions to take into account the font zoom factor
const adjustedScrollY = win.scrollY / zoomFactor;
if (isSafari()) {
// We have to reinstate zoomFactor as it is only applied to horizontal positioning in Safari
zoomFactor = zoomIsSet ? currentDocument.documentElement.style.zoom : 1;
}
divRectX = divRectX / zoomFactor;
triangleX = triangleX / zoomFactor;
// Now set the calculated x and y positions
div.style.top = divRectY + win.scrollY + 'px';
div.style.top = divRectY + adjustedScrollY + 'px';
div.style.left = divRectX + 'px';
div.style.opacity = '1';
// Now create the arrow span element. Note that we cannot attach it yet as we need to populate the div first
// and doing so will overwrite the innerHTML of the div
const triangleColour = getComputedStyle(div).borderColor; // Same as border colour of div
const triangleColour = getComputedStyle(div).borderBottomColor; // Same as border colour of div (UWP needs specific border colour)
const span = document.createElement('span');
span.style.cssText = `
width: 0;
@ -420,6 +451,12 @@ function createNewKiwixPopoverCointainer (win, anchor, event) {
return { div: div, span: span };
}
function isSafari () {
return typeof navigator !== 'undefined' &&
/^((?!chrome|android).)*safari/i.test(navigator.userAgent) &&
CSS.supports('-webkit-backdrop-filter', 'blur(1px)');
};
/**
* Adds event listeners to the popover's control icons
* @param {Element} anchor The anchor which launched the popover