copy panel/LogView.js from manager to manager5

www/manager5/panel/LogView.js

+/*
+ * Display log entries in a panel with scrollbar
+ * The log entries are automatically refreshed via a background task,
+ * with newest entries comming at the bottom
+ */
+Ext.define('PVE.panel.LogView', {
+    extend: 'Ext.panel.Panel',
+
+    alias: ['widget.pveLogView'],
+
+    pageSize: 500,
+
+    lineHeight: 16,
+
+    viewInfo: undefined,
+
+    scrollToEnd: true,
+
+    getMaxDown: function(scrollToEnd) {
+        var me = this;
+
+	var target = me.getTargetEl();
+	var dom = target.dom;
+	if (scrollToEnd) {
+	    dom.scrollTop = dom.scrollHeight - dom.clientHeight;
+	}
+
+	var maxDown = dom.scrollHeight - dom.clientHeight - 
+	    dom.scrollTop;
+
+	return maxDown;
+    },
+
+    updateView: function(start, end, total, text) {
+        var me = this;
+	var el = me.dataCmp.el;
+
+	if (me.viewInfo && me.viewInfo.start === start &&
+	    me.viewInfo.end === end && me.viewInfo.total === total &&
+	    me.viewInfo.textLength === text.length) {
+	    return; // same content
+	}
+
+	var maxDown = me.getMaxDown();
+	var scrollToEnd = (maxDown <= 0) && me.scrollToEnd;
+
+	el.setStyle('padding-top', start*me.lineHeight + 'px');
+	el.update(text);
+	me.dataCmp.setHeight(total*me.lineHeight);
+
+	if (scrollToEnd) {
+	    me.getMaxDown(true);
+	}
+
+	me.viewInfo = {
+	    start: start,
+	    end: end,
+	    total: total,
+	    textLength:  text.length
+	};
+    },
+
+    doAttemptLoad: function(start) {
+        var me = this;
+
+	PVE.Utils.API2Request({
+	    url: me.url,
+	    params: {
+		start: start,
+		limit: me.pageSize
+	    },
+	    method: 'GET',
+	    success: function(response) {
+		PVE.Utils.setErrorMask(me, false);
+		var list = response.result.data;
+		var total = response.result.total;
+		var first = 0, last = 0;
+		var text = '';
+		Ext.Array.each(list, function(item) {
+		    if (!first|| item.n < first) {
+			first = item.n;
+		    }
+		    if (!last || item.n > last) {
+			last = item.n;
+		    }
+		    text = text + Ext.htmlEncode(item.t) + "<br>";
+		});
+
+		if (first && last && total) {
+		    me.updateView(first -1 , last -1, total, text);
+		} else {
+		    me.updateView(0, 0, 0, '');
+		}
+	    },
+	    failure: function(response) {
+		var msg = response.htmlStatus;
+		PVE.Utils.setErrorMask(me, msg);
+	    }
+	});			      
+    },
+
+    attemptLoad: function(start) {
+        var me = this;
+        if (!me.loadTask) {
+            me.loadTask = Ext.create('Ext.util.DelayedTask', me.doAttemptLoad, me, []);
+        }
+        me.loadTask.delay(200, me.doAttemptLoad, me, [start]);
+    },
+
+    requestUpdate: function(top, force) {
+	var me = this;
+
+	if (top === undefined) {
+	    var target = me.getTargetEl();
+	    top = target.dom.scrollTop;
+	}
+
+	var viewStart = parseInt((top / me.lineHeight) - 1, 10);
+	if (viewStart < 0) {
+	    viewStart = 0;
+	}
+	var viewEnd = parseInt(((top + me.getHeight())/ me.lineHeight) + 1, 10);
+	var info = me.viewInfo;
+
+	if (info && !force) {
+	    if (viewStart >= info.start && viewEnd <= info.end) {
+		return;
+	    }
+	}
+
+	var line = parseInt((top / me.lineHeight) - (me.pageSize / 2) + 10, 10);
+	if (line < 0) {
+	    line = 0;
+	}
+
+	me.attemptLoad(line);
+    },
+
+    afterRender: function() {
+	var me = this;
+
+        me.callParent(arguments);
+ 
+	Ext.Function.defer(function() {
+	    var target = me.getTargetEl();
+	    target.on('scroll',  function(e) {
+		me.requestUpdate();
+	    });
+	    me.requestUpdate(0);
+	}, 20);
+    },
+
+    initComponent : function() {
+	/*jslint confusion: true */
+
+	var me = this;
+
+	if (!me.url) {
+	    throw "no url specified";
+	}
+
+	me.dataCmp = Ext.create('Ext.Component', {
+	    style: 'font:normal 11px tahoma, arial, verdana, sans-serif;' +
+		'line-height: ' + me.lineHeight.toString() + 'px; white-space: pre;'
+	});
+
+	me.task = Ext.TaskManager.start({
+	    run: function() {
+		if (!me.isVisible() || !me.scrollToEnd || !me.viewInfo) {
+		    return;
+		}
+		
+		var maxDown = me.getMaxDown();
+		if (maxDown > 0) {
+		    return;
+		}
+
+		me.requestUpdate(undefined, true);
+	    },
+	    interval: 1000
+	});
+
+	Ext.apply(me, {
+	    autoScroll: true,
+	    layout: 'auto',
+	    items: me.dataCmp,
+	    bodyStyle: 'padding: 5px;',
+	    listeners: {
+		show: function() {
+		    var target = me.getTargetEl();
+		    if (target && target.dom) {
+			target.dom.scrollTop = me.savedScrollTop;
+		    }
+		},
+		beforehide: function() {
+		    // Hack: chrome reset scrollTop to 0, so we save/restore
+		    var target = me.getTargetEl();
+		    if (target && target.dom) {
+			me.savedScrollTop = target.dom.scrollTop;
+		    }
+		},
+		destroy: function() {
+		    Ext.TaskManager.stop(me.task);
+		}
+	    }
+	});
+
+	me.callParent();
+    }
+});