Enable Log Header "Save" Feature

Enable changes on log header dialog box.
Missing values from the log header can be entered on the dialog box and
saved. The original log file remains unaltered and any existing values
in the header will overwrite the dialog box entries.

Author: Gary Keeble

js/flightlog.js

@@ -117,7 +117,7 @@ function FlightLog(logData) {
     };
 
     this.setSysConfig = function(newSysConfig) {
-        parser.sysConfig = newSysConfig;
+        $.extend(true, parser.sysConfig, newSysConfig);
     };
 
 

js/main.js

@@ -39,6 +39,9 @@ function BlackboxLogViewer() {
         // JSON graph configuration:
         graphConfig = {},
 
+        offsetCache = [], // Storage for the offset cache (last 20 files)
+        currentOffsetCache = {log:null, index:null, video:null, offset:null},
+
         // JSON array of graph configurations for New Workspaces feature
         lastGraphConfig = null,     // Undo feature - go back to last configuration.
         workspaceGraphConfigs = {}, // Workspaces
@@ -100,7 +103,7 @@ function BlackboxLogViewer() {
          */
         $(".video-offset").val((videoOffset >= 0 ? "+" : "") + (videoOffset.toFixed(3) != videoOffset ? videoOffset.toFixed(3) : videoOffset));
 
-        if (wihtoutRefresh) invalidateGraph();
+        if (withoutRefresh) invalidateGraph();
     }
 
     function isInteger(value) {
@@ -434,6 +437,7 @@ function BlackboxLogViewer() {
                 for (var i = 0; i < flightLog.getLogCount(); i++) {
                     if (flightLog.openLog(i)) {
                         success = true;
+                        currentOffsetCache.index = i;
                         break;
                     }
                 }
@@ -443,9 +447,11 @@ function BlackboxLogViewer() {
                 }
             } else {
                 flightLog.openLog(logIndex);
+                currentOffsetCache.index = logIndex;
             }
         } catch (e) {
             alert("Error opening log: " + e);
+            currentOffsetCache.index = null;
             return;
         }
 
@@ -510,6 +516,8 @@ function BlackboxLogViewer() {
             }
 
             renderLogFileInfo(file);
+            currentOffsetCache.log      = file.name; // store the name of the loaded log file
+            currentOffsetCache.index    = null;      // and clear the index
 
             hasLog = true;
             $("html").addClass("has-log");
@@ -524,13 +532,15 @@ function BlackboxLogViewer() {
     }
 
     function loadVideo(file) {
+        currentOffsetCache.video = file.name; // store the name of the loaded video
         if (videoURL) {
             URL.revokeObjectURL(videoURL);
             videoURL = false;
         }
 
         if (!URL.createObjectURL) {
             alert("Sorry, your web browser doesn't support showing videos from your local computer. Try Google Chrome instead.");
+            currentOffsetCache.video = null; // clear the associated video name
             return;
         }
 
@@ -634,6 +644,13 @@ function BlackboxLogViewer() {
                                     ]};
             }
     });
+
+    // Get the offsetCache buffer
+    prefs.get('offsetCache', function(item) {
+        if(item) {
+            offsetCache = item;
+        }
+    })
 
     activeGraphConfig.addListener(function() {
         invalidateGraph();
@@ -677,12 +694,11 @@ function BlackboxLogViewer() {
            } 
         });
 
-
         $(".file-open").change(function(e) {
             var 
                 files = e.target.files,
                 i;
-            
+
             for (i = 0; i < files.length; i++) {
                 var
                     isLog = files[i].name.match(/\.(TXT|CFL|LOG)$/i),
@@ -701,8 +717,19 @@ function BlackboxLogViewer() {
                     loadVideo(files[i]);
                 }
             }
-        });
 
+            // finally, see if there is an offsetCache value already, and auto set the offset
+            for(i=0; i<offsetCache.length; i++) {
+                if(
+                    (currentOffsetCache.log   == offsetCache[i].log)   &&
+                    (currentOffsetCache.index == offsetCache[i].index) &&
+                    (currentOffsetCache.video == offsetCache[i].video)    ) {
+                        setVideoOffset(offsetCache[i].offset, true);
+                    }
+
+            }
+        });
+        
         // New View Controls
         $(".view-craft").click(function() {
             hasCraft = !hasCraft;
@@ -814,7 +841,14 @@ function BlackboxLogViewer() {
             var offset = parseFloat($(".video-offset").val());
 
             if (!isNaN(offset)) {
-                videoOffset = offset;
+                videoOffset = offset;                
+                // Store the video offset to the local cache
+                currentOffsetCache.offset = offset;
+                if(hasLog && hasVideo) {
+                    if(offsetCache.length > 20) offsetCache.shift();
+                    offsetCache.push(currentOffsetCache);
+                    prefs.set('offsetCache', offsetCache);
+                }
                 invalidateGraph();
             }
         });
@@ -853,10 +887,11 @@ function BlackboxLogViewer() {
             headerDialog = new HeaderDialog($("#dlgHeaderDialog"), function(newSysConfig) {
                 if(newSysConfig!=null) {
                     prefs.set('lastHeaderData', newSysConfig);
-                    //flightLog.setSysConfig(newSysConfig);
+                    flightLog.setSysConfig(newSysConfig);
 
                     // Save Current Position then re-calculate all the log information
                     var activePosition = (hasVideo)?video.currentTime:currentBlackboxTime;
+                    
                     selectLog(null);
                     if (hasVideo) {
                         setVideoTime(activePosition);