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-rw-r--r--chrome_frame/CFInstall.js232
1 files changed, 179 insertions, 53 deletions
diff --git a/chrome_frame/CFInstall.js b/chrome_frame/CFInstall.js
index 915f958..b7315bd 100644
--- a/chrome_frame/CFInstall.js
+++ b/chrome_frame/CFInstall.js
@@ -14,12 +14,12 @@
return;
}
- /**
+ /**
* returns an item based on DOM ID. Optionally a document may be provided to
* specify the scope to search in. If a node is passed, it's returned as-is.
* @param {string|Node} id The ID of the node to be located or a node
* @param {Node} doc Optional A document to search for id.
- * @return {Node}
+ * @return {Node}
*/
var byId = function(id, doc) {
return (typeof id == 'string') ? (doc || document).getElementById(id) : id;
@@ -28,86 +28,140 @@
/////////////////////////////////////////////////////////////////////////////
// Plugin Detection
/////////////////////////////////////////////////////////////////////////////
-
- var cachedAvailable;
- /**
+ /**
* Checks to find out if ChromeFrame is available as a plugin
- * @return {Boolean}
+ * @return {Boolean}
*/
var isAvailable = function() {
- if (typeof cachedAvailable != 'undefined') {
- return cachedAvailable;
+ // For testing purposes.
+ if (scope.CFInstall._force) {
+ return scope.CFInstall._forceValue;
}
- cachedAvailable = false;
-
// Look for CF in the User Agent before trying more expensive checks
var ua = navigator.userAgent.toLowerCase();
- if (ua.indexOf("chromeframe") >= 0 || ua.indexOf("x-clock") >= 0) {
- cachedAvailable = true;
- return cachedAvailable;
+ if (ua.indexOf("chromeframe") >= 0) {
+ return true;
}
if (typeof window['ActiveXObject'] != 'undefined') {
try {
var obj = new ActiveXObject('ChromeTab.ChromeFrame');
if (obj) {
- cachedAvailable = true;
+ return true;
}
} catch(e) {
// squelch
}
}
- return cachedAvailable;
+ return false;
};
-
- /** @type {boolean} */
- var cfStyleTagInjected = false;
-
- /**
- * Creates a style sheet in the document which provides default styling for
- * ChromeFrame instances. Successive calls should have no additive effect.
+ /**
+ * Creates a style sheet in the document containing the passed rules.
*/
- var injectCFStyleTag = function() {
- if (cfStyleTagInjected) {
- // Once and only once
- return;
- }
+ var injectStyleSheet = function(rules) {
try {
- var rule = '.chromeFrameInstallDefaultStyle {' +
- 'width: 500px;' +
- 'height: 400px;' +
- 'padding: 0;' +
- 'border: 1px solid #0028c4;' +
- 'margin: 0;' +
- '}';
var ss = document.createElement('style');
ss.setAttribute('type', 'text/css');
if (ss.styleSheet) {
- ss.styleSheet.cssText = rule;
+ ss.styleSheet.cssText = rules;
} else {
- ss.appendChild(document.createTextNode(rule));
+ ss.appendChild(document.createTextNode(rules));
}
var h = document.getElementsByTagName('head')[0];
var firstChild = h.firstChild;
h.insertBefore(ss, firstChild);
- cfStyleTagInjected = true;
} catch (e) {
// squelch
}
};
+ /** @type {boolean} */
+ var cfStyleTagInjected = false;
+ /** @type {boolean} */
+ var cfHiddenInjected = false;
- /**
+ /**
+ * Injects style rules into the document to handle formatting of Chrome Frame
+ * prompt. Multiple calls have no effect.
+ */
+ var injectCFStyleTag = function() {
+ if (cfStyleTagInjected) {
+ // Once and only once
+ return;
+ }
+ var rules = '.chromeFrameInstallDefaultStyle {' +
+ 'width: 800px;' +
+ 'height: 600px;' +
+ 'position: absolute;' +
+ 'left: 50%;' +
+ 'top: 50%;' +
+ 'margin-left: -400px;' +
+ 'margin-top: -300px;' +
+ '}' +
+ '.chromeFrameOverlayContent {' +
+ 'position: absolute;' +
+ 'margin-left: -400px;' +
+ 'margin-top: -300px;' +
+ 'left: 50%;' +
+ 'top: 50%;' +
+ 'border: 1px solid #93B4D9;' +
+ 'background-color: white;' +
+ '}' +
+ '.chromeFrameOverlayContent iframe {' +
+ 'width: 800px;' +
+ 'height: 600px;' +
+ 'border: none;' +
+ '}' +
+ '.chromeFrameOverlayCloseBar {' +
+ 'height: 1em;' +
+ 'text-align: right;' +
+ 'background-color: #CADEF4;' +
+ '}' +
+ '.chromeFrameOverlayUnderlay {' +
+ 'position: absolute;' +
+ 'width: 100%;' +
+ 'height: 100%;' +
+ 'background-color: white;' +
+ 'opacity: 0.5;' +
+ '-moz-opacity: 0.5;' +
+ '-webkit-opacity: 0.5;' +
+ '-ms-filter: ' +
+ '"progid:DXImageTransform.Microsoft.Alpha(Opacity=50)";' +
+ 'filter: alpha(opacity=50);' +
+ '}';
+ injectStyleSheet(rules);
+ cfStyleTagInjected = true;
+ };
+
+ /**
+ * Injects style rules to hide the overlay version of the GCF prompt.
+ * Multiple calls have no effect.
+ */
+ var closeOverlay = function() {
+ // IE has a limit to the # of <style> tags allowed, so we avoid
+ // tempting the fates.
+ if (cfHiddenInjected) {
+ return;
+ }
+ var rules = '.chromeFrameOverlayContent { display: none; }' +
+ '.chromeFrameOverlayUnderlay { display: none; }';
+ injectStyleSheet(rules);
+ // Hide the dialog for a year (or until cookies are deleted).
+ var age = 365 * 24 * 60 * 60 * 1000;
+ document.cookie = "disableGCFCheck=1;path=/;max-age="+age;
+ cfHiddenInjected = true;
+ };
+
+ /**
* Plucks properties from the passed arguments and sets them on the passed
* DOM node
* @param {Node} node The node to set properties on
* @param {Object} args A map of user-specified properties to set
*/
var setProperties = function(node, args) {
- injectCFStyleTag();
var srcNode = byId(args['node']);
@@ -118,7 +172,7 @@
node.style.cssText = ' ' + cssText;
var classText = args['className'] || '';
- node.className = 'chromeFrameInstallDefaultStyle ' + classText;
+ node.className = classText;
// default if the browser doesn't so we don't show sad-tab
var src = args['src'] || 'about:blank';
@@ -130,20 +184,70 @@
}
};
- /**
+ /**
* Creates an iframe.
* @param {Object} args A bag of configuration properties, including values
* like 'node', 'cssText', 'className', 'id', 'src', etc.
- * @return {Node}
+ * @return {Node}
*/
var makeIframe = function(args) {
var el = document.createElement('iframe');
+ el.setAttribute('frameborder', '0');
+ el.setAttribute('border', '0');
setProperties(el, args);
return el;
};
+ /**
+ * Adds an unadorned iframe into the page, taking arguments to customize it.
+ * @param {Object} args A map of user-specified properties to set
+ */
+ var makeInlinePrompt = function(args) {
+ args.className = 'chromeFrameInstallDefaultStyle ' +
+ (args.className || '');
+ var ifr = makeIframe(args);
+ // TODO(slightlyoff): handle placement more elegantly!
+ if (!ifr.parentNode) {
+ var firstChild = document.body.firstChild;
+ document.body.insertBefore(ifr, firstChild);
+ }
+ };
+
+ /**
+ * Adds a styled, closable iframe into the page with a background that
+ * emulates a modal dialog.
+ * @param {Object} args A map of user-specified properties to set
+ */
+ var makeOverlayPrompt = function(args) {
+ if (byId('chromeFrameOverlayContent')) {
+ return; // Was previously created. Bail.
+ }
+
+ var n = document.createElement('span');
+ n.innerHTML = '<div class="chromeFrameOverlayUnderlay"></div>' +
+ '<table class="chromeFrameOverlayContent"' +
+ 'id="chromeFrameOverlayContent"' +
+ 'cellpadding="0" cellspacing="0">' +
+ '<tr class="chromeFrameOverlayCloseBar">' +
+ '<td>' +
+ // TODO(slightlyoff): i18n
+ '<button id="chromeFrameCloseButton">close</button>' +
+ '</td>' +
+ '</tr>' +
+ '<tr>' +
+ '<td id="chromeFrameIframeHolder"></td>' +
+ '</tr>' +
+ '</table>';
+
+ document.body.appendChild(n);
+ var ifr = makeIframe(args);
+ byId('chromeFrameIframeHolder').appendChild(ifr);
+ byId('chromeFrameCloseButton').onclick = closeOverlay;
+ };
+
var CFInstall = {};
- /**
+
+ /**
* Checks to see if Chrome Frame is available, if not, prompts the user to
* install. Once installation is begun, a background timer starts,
* checkinging for a successful install every 2 seconds. Upon detection of
@@ -158,17 +262,40 @@
CFInstall.check = function(args) {
args = args || {};
- // We currently only support CF in IE
+ // We currently only support CF in IE
// TODO(slightlyoff): Update this should we support other browsers!
- var ieRe = /MSIE (\S+)/;
- if (!ieRe.test(navigator.userAgent)) {
+ var ua = navigator.userAgent;
+ var ieRe = /MSIE \S+; Windows NT/;
+ var bail = false;
+ if (ieRe.test(ua)) {
+ // We also only support Win2003/XPSP2 or better. See:
+ // http://msdn.microsoft.com/en-us/library/ms537503%28VS.85%29.aspx
+ if (parseFloat(ua.split(ieRe)[1]) < 6 &&
+ ua.indexOf('SV1') >= 0) {
+ bail = true;
+ }
+ } else {
+ bail = true;
+ }
+ if (bail) {
return;
}
+ // Inject the default styles
+ injectCFStyleTag();
+ if (document.cookie.indexOf("disableGCFCheck=1") >=0) {
+ // If we're supposed to hide the overlay prompt, add the rules to do it.
+ closeOverlay();
+ }
+
+ // When loaded in an alternate protocol (e.g., "file:"), still call out to
+ // the right location.
+ var currentProtocol = document.location.protocol;
+ var protocol = (currentProtocol == 'https:') ? 'https:' : 'http:';
// TODO(slightlyoff): Update this URL when a mini-installer page is
// available.
- var installUrl = '//www.google.com/chromeframe';
+ var installUrl = protocol + '//www.google.com/chromeframe';
if (!isAvailable()) {
if (args.onmissing) {
args.onmissing();
@@ -180,12 +307,9 @@
if (!preventPrompt) {
if (mode == 'inline') {
- var ifr = makeIframe(args);
- // TODO(slightlyoff): handle placement more elegantly!
- if (!ifr.parentNode) {
- var firstChild = document.body.firstChild;
- document.body.insertBefore(ifr, firstChild);
- }
+ makeInlinePrompt(args);
+ } else if (mode == 'overlay') {
+ makeOverlayPrompt(args);
} else {
window.open(args.src);
}
@@ -213,6 +337,8 @@
}
};
+ CFInstall._force = false;
+ CFInstall._forceValue = false;
CFInstall.isAvailable = isAvailable;
// expose CFInstall to the external scope. We've already checked to make
generated by cgit v1.1 at 2025-01-20 22:00:40 +0000