X-Git-Url: http://git.maemo.org/git/?p=mardrone;a=blobdiff_plain;f=mardrone%2Fimports%2FQt%2Flabs%2Fcomponents%2Fnative%2FPageStack.js;fp=mardrone%2Fimports%2FQt%2Flabs%2Fcomponents%2Fnative%2FPageStack.js;h=3b560dc83ab81efc8cf95af24fad5dc0e0a9589f;hp=0000000000000000000000000000000000000000;hb=53abfcee86d03676ae5e3b648d6c7cee69c2f4e1;hpb=f7f1d7c4427cba2c8490f2767259b1d06f66c7ed

diff --git a/mardrone/imports/Qt/labs/components/native/PageStack.js b/mardrone/imports/Qt/labs/components/native/PageStack.js
new file mode 100644
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@@ -0,0 +1,219 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Components project.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+// Page stack. Items are page containers.
+var pageStack = [];
+
+// Page component cache map. Key is page url, value is page component.
+var componentCache = {};
+
+// Returns the page stack depth.
+function getDepth() {
+    return pageStack.length;
+}
+
+// Pushes a page on the stack.
+function push(page, properties, replace, immediate) {
+    // page order sanity check
+    if ((!replace && page == currentPage) ||
+            (replace && pageStack.length > 1 && page == pageStack[pageStack.length - 2].page)) {
+        throw new Error("Cannot navigate so that the resulting page stack has two consecutive entries of the same page instance.");
+    }
+
+    // figure out if more than one page is being pushed
+    var pages;
+    if (page instanceof Array) {
+        pages = page;
+        page = pages.pop();
+        if (page.createObject === undefined && page.parent === undefined && typeof page != "string") {
+            properties = properties || page.properties;
+            page = page.page;
+        }
+    }
+
+    // get the current container
+    var oldContainer = pageStack[pageStack.length - 1];
+
+    // pop the old container off the stack if this is a replace
+    if (oldContainer && replace) {
+        pageStack.pop();
+    }
+
+    // push any extra defined pages onto the stack
+    if (pages) {
+        var i;
+        for (i = 0; i < pages.length; i++) {
+            var tPage = pages[i];
+            var tProps;
+            if (tPage.createObject === undefined && tPage.parent === undefined && typeof tPage != "string") {
+                tProps = tPage.properties;
+                tPage = tPage.page;
+            }
+            pageStack.push(initPage(tPage, tProps));
+        }
+    }
+
+    // initialize the page
+    var container = initPage(page, properties);
+
+    // push the page container onto the stack
+    pageStack.push(container);
+
+    depth = pageStack.length;
+    currentPage = container.page;
+
+    // perform page transition
+    immediate = immediate || !oldContainer;
+    if (oldContainer) {
+        oldContainer.pushExit(replace, immediate);
+    }
+    container.pushEnter(replace, immediate);
+
+    // sync tool bar
+    var tools = container.page.tools || null;
+    if (toolBar) {
+        toolBar.setTools(tools, immediate ? "set" : replace ? "replace" : "push");
+    }
+
+    return container.page;
+}
+
+// Initializes a page and its container.
+function initPage(page, properties) {
+    var container = containerComponent.createObject(root);
+
+    var pageComp;
+    if (page.createObject) {
+        // page defined as component
+        pageComp = page;
+    } else if (typeof page == "string") {
+        // page defined as string (a url)
+        pageComp = componentCache[page];
+        if (!pageComp) {
+            pageComp = componentCache[page] = Qt.createComponent(page);
+        }
+    }
+    if (pageComp) {
+        if (pageComp.status == Component.Error) {
+            throw new Error("Error while loading page: " + pageComp.errorString());
+        } else {
+            // instantiate page from component
+            page = pageComp.createObject(container, properties || {});
+        }
+    } else {
+        // copy properties to the page
+        for (var prop in properties) {
+            if (properties.hasOwnProperty(prop)) {
+                page[prop] = properties[prop];
+            }
+        }
+    }
+
+    container.page = page;
+    container.owner = page.parent;
+
+    // the page has to be reparented if
+    if (page.parent != container) {
+        page.parent = container;
+    }
+
+    if (page.pageStack !== undefined) {
+        page.pageStack = root;
+    }
+
+    return container;
+}
+
+// Pops a page off the stack.
+function pop(page, immediate) {
+    // make sure there are enough pages in the stack to pop
+    if (pageStack.length > 1) {
+        // pop the current container off the stack and get the next container
+        var oldContainer = pageStack.pop();
+        var container = pageStack[pageStack.length - 1];
+        if (page !== undefined) {
+            // an unwind target has been specified - pop until we find it
+            while (page != container.page && pageStack.length > 1) {
+                container.cleanup();
+                pageStack.pop();
+                container = pageStack[pageStack.length - 1];
+            }
+        }
+
+        depth = pageStack.length;
+        currentPage = container.page;
+
+        // perform page transition
+        oldContainer.popExit(immediate);
+        container.popEnter(immediate);
+
+        // sync tool bar
+        var tools = container.page.tools || null;
+        if (toolBar) {
+            toolBar.setTools(tools, immediate ? "set" : "pop");
+        }
+
+        return oldContainer.page;
+    } else {
+        return null;
+    }
+}
+
+// Clears the page stack.
+function clear() {
+    var container;
+    while (container = pageStack.pop()) {
+        container.cleanup();
+    }
+    depth = 0;
+    currentPage = null;
+}
+
+// Iterates through all pages in the stack (top to bottom) to find a page.
+function find(func) {
+    for (var i = pageStack.length - 1; i >= 0; i--) {
+        var page = pageStack[i].page;
+        if (func(page)) {
+            return page;
+        }
+    }
+    return null;
+}
+