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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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142 changes: 142 additions & 0 deletions
142
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 +1,142 @@ | ||
| 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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| const IFRAME_READY_MSG = 'wolvic-autowebxr-iframeReady'; | ||
| const TARGET_ELEMENT_MSG = 'wolvic-autowebxr-targetElement'; | ||
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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 === PARENT_ELEMENT_XPATH_PARAMETER) | ||
| parentElementXPath = value; | ||
| else if (key === TARGET_ELEMENT_XPATH_PARAMETER) | ||
| 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 typically an iframe and, if it comes from a different origin, | ||
| // we might not be able to access its contents directly. | ||
| // If parentElementXPath is null, we will use the root to find the target element. | ||
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| var parent, parentDocument; | ||
| if (parentElementXPath) { | ||
| parent = getElementByXPath(document, parentElementXPath); | ||
| if (!parent) { | ||
| logDebug('Parent element not found, retrying'); | ||
| setTimeout(clickImmersiveElement, 1000); | ||
| return; | ||
| } | ||
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| try { | ||
| parentDocument = parent.contentDocument || parent.contentWindow.document; | ||
| } catch (e) { | ||
| logDebug('Parent iframe is from a different origin'); | ||
| const iframeWindow = parent.contentWindow; | ||
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| const targetElementMsg = { | ||
| action: TARGET_ELEMENT_MSG, | ||
| targetElementXPath: targetElementXPath | ||
| }; | ||
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| iframeWindow.postMessage(targetElementMsg, '*'); | ||
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| // The iframe might not be ready yet, so we set up a listener for the "iframe ready" message. | ||
| const handleIframeReady = (event) => { | ||
| if (event.source === iframeWindow && event.data === IFRAME_READY_MSG) { | ||
| window.removeEventListener('message', handleIframeReady); | ||
| iframeWindow.postMessage(targetElementMsg, '*'); | ||
| } | ||
| }; | ||
| window.addEventListener('message', handleIframeReady); | ||
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| return; | ||
| } | ||
| } 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; | ||
| } else { | ||
| logDebug('Parent is loaded'); | ||
| } | ||
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| let targetElement = getElementByXPath(parentDocument, targetElementXPath); | ||
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| if (targetElement) { | ||
| logDebug('Target element found, calling click()'); | ||
| targetElement.click(); | ||
| targetElement.click(); | ||
| } else { | ||
| logDebug('Target element not found, we will try again'); | ||
| setTimeout(clickImmersiveElement, 1000); | ||
| } | ||
| } | ||
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| function launchImmersiveFromIframe() { | ||
| window.addEventListener('message', function(event) { | ||
| if (event.data.action === TARGET_ELEMENT_MSG) { | ||
| let targetElement = getElementByXPath(document, event.data.targetElementXPath); | ||
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| if (targetElement) { | ||
| logDebug('Target element found in iframe, calling click()'); | ||
| targetElement.click(); | ||
| targetElement.click(); | ||
| } else { | ||
| logDebug('Target element not found in iframe, retrying'); | ||
| setTimeout(function() { | ||
| window.postMessage(event.data, '*'); | ||
| }, 1000); | ||
| } | ||
| } | ||
| }); | ||
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| window.parent.postMessage(IFRAME_READY_MSG, '*'); | ||
| } | ||
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| // Main script execution | ||
| if (window.top === window.self) { | ||
| if (document.readyState === 'complete') { | ||
| logDebug('Root document is completely ready'); | ||
| clickImmersiveElement(); | ||
| } else { | ||
| logDebug('Root document is not ready yet'); | ||
| window.addEventListener('load', clickImmersiveElement); | ||
| } | ||
| } else { | ||
| if (document.readyState === 'complete') { | ||
| logDebug('Iframe is completely ready'); | ||
| launchImmersiveFromIframe(); | ||
| } else { | ||
| logDebug('Iframe is not ready yet'); | ||
| window.addEventListener('load', launchImmersiveFromIframe); | ||
| } | ||
| } |
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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": true | ||
| } | ||
| ] | ||
| } |
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