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This PR implements support for opening immersive experiences directly as soon as the application is launched. We do this by adding a built-in extension which will activate a particular element in the page. We need to set the preference dom.vr.require-gesture to false so this script can launch immersive WebXR experiences. The information required to identify the element to activate is passed as parameters to the Intent: - open_in_immersive - open_in_immersive_parent_xpath - open_in_immersive_element_xpath - a target URL to open
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81 changes: 81 additions & 0 deletions
81
app/src/main/assets/extensions/wolvic_autowebxr/content.js
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| const LOGTAG = '[wolvic:autowebxr]'; | ||
| const ENABLE_LOGS = true; | ||
| const logDebug = (...args) => ENABLE_LOGS && console.log(LOGTAG, ...args); | ||
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| const PARENT_ELEMENT_XPATH_PARAMETER = 'wolvic-autowebxr-parentElementXPath'; | ||
| const TARGET_ELEMENT_XPATH_PARAMETER = 'wolvic-autowebxr-targetElementXPath'; | ||
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| var parentElementXPath; | ||
| var targetElementXPath; | ||
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| function getElementByXPath(document, xpath) { | ||
| let result = document.evaluate(xpath, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null); | ||
| return result.singleNodeValue; | ||
| } | ||
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| function clickImmersiveElement() { | ||
| // check if the current URL has extra query parameters | ||
| parentElementXPath = undefined; | ||
| targetElementXPath = undefined; | ||
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| let url = document.URL; | ||
| let params = new URLSearchParams(new URL(url).search); | ||
| for (let [key, value] of params) { | ||
| if (key === 'wolvic-autowebxr-parentElementXPath') | ||
| parentElementXPath = value | ||
| else if (key === 'wolvic-autowebxr-targetElementXPath') | ||
| targetElementXPath = value; | ||
| } | ||
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| // we need at least the target element to click | ||
| if (!targetElementXPath) | ||
| return; | ||
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| logDebug('Preparing to open immersive WebXR; parentElementXPath: ' + parentElementXPath + ' ; targetElementXPath: ' + targetElementXPath); | ||
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| // the parent element is usually an iframe; if parentElementXPath is null, we use the root | ||
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| var parent, parentDocument; | ||
| if (parentElementXPath) { | ||
| var parent = getElementByXPath(document, parentElementXPath); | ||
| if (!parent) { | ||
| logDebug('parent not found, retrying'); | ||
| setTimeout(clickImmersiveElement, 1000); | ||
| return; | ||
| } | ||
| parentDocument = parent.contentDocument || parent.contentWindow.document; | ||
| } else { | ||
| parent = window; | ||
| parentDocument = document; | ||
| } | ||
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| if (parentDocument.readyState !== 'complete') { | ||
| logDebug('parent is still loading'); | ||
| parent.addEventListener('load', function() { | ||
| logDebug('parent has finished loading'); | ||
| clickImmersiveElement(); | ||
| }); | ||
| return; | ||
| } | ||
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| logDebug('parent is loaded'); | ||
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| let targetElement = getElementByXPath(parentDocument, targetElementXPath); | ||
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| if (targetElement) { | ||
| logDebug('target element found, clicking'); | ||
| // This fails with "DOMException: A user gesture is required" unless dom.vr.require-gesture is set to false. | ||
| targetElement.click(); | ||
| } else { | ||
| logDebug('target element not found, retrying'); | ||
| setTimeout(clickImmersiveElement, 1000); | ||
| } | ||
| } | ||
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| if (document.readyState === 'complete') { | ||
| logDebug('document is completely ready'); | ||
| clickImmersiveElement(); | ||
| } else { | ||
| logDebug('document is not ready yet'); | ||
| window.addEventListener('load', clickImmersiveElement); | ||
| } |
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app/src/main/assets/extensions/wolvic_autowebxr/manifest.json
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| @@ -0,0 +1,23 @@ | ||
| { | ||
| "manifest_version": 2, | ||
| "name": "Wolvic WebXR Automator", | ||
| "version": "1.0", | ||
| "description": "Enter WebXR Experiences Automatically", | ||
| "browser_specific_settings": { | ||
| "gecko": { | ||
| "id": "wolvic-autowebxr@igalia.com" | ||
| } | ||
| }, | ||
| "content_scripts": [ | ||
| { | ||
| "matches": [ | ||
| "*://*/*" | ||
| ], | ||
| "js": [ | ||
| "content.js" | ||
| ], | ||
| "run_at": "document_idle", | ||
| "all_frames": false | ||
| } | ||
| ] | ||
| } |
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