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From tim...@apache.org
Subject [10/19] js commit: got truncate working
Date Thu, 17 May 2012 22:37:08 GMT
got truncate working


Project: http://git-wip-us.apache.org/repos/asf/incubator-cordova-js/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-cordova-js/commit/a338d4b4
Tree: http://git-wip-us.apache.org/repos/asf/incubator-cordova-js/tree/a338d4b4
Diff: http://git-wip-us.apache.org/repos/asf/incubator-cordova-js/diff/a338d4b4

Branch: refs/heads/playbookFile
Commit: a338d4b4fc5081bb60cf12e2270f9e2aadb950d5
Parents: 6c34ea6
Author: Tim Kim <timk@adobe.com>
Authored: Wed May 9 17:18:59 2012 -0700
Committer: Tim Kim <timk@adobe.com>
Committed: Wed May 9 17:18:59 2012 -0700

----------------------------------------------------------------------
 lib/playbook/plugin/playbook/FileWriter.js |  140 +++++++----------------
 1 files changed, 42 insertions(+), 98 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/incubator-cordova-js/blob/a338d4b4/lib/playbook/plugin/playbook/FileWriter.js
----------------------------------------------------------------------
diff --git a/lib/playbook/plugin/playbook/FileWriter.js b/lib/playbook/plugin/playbook/FileWriter.js
index f2dfced..159b0df 100644
--- a/lib/playbook/plugin/playbook/FileWriter.js
+++ b/lib/playbook/plugin/playbook/FileWriter.js
@@ -84,10 +84,7 @@ FileWriter.prototype.write = function(text) {
     }
 
     // Write file
-    // TODO: Need to think about how to make this asynch
-    // can't append to file - must open a temp file, write to temp, then delete current file
-    // and save again - lame
-    // also have to investigate how bb blobs work in order to set proper seek positions :S
+    // TODO: Need to think about how to make this asynch and add try/catch
 
     if (typeof me.onwrite === "function") {
         me.onwrite(new ProgressEvent("write", {"target":me}));
@@ -105,9 +102,7 @@ FileWriter.prototype.write = function(text) {
             if(blob){
                 oldText = blackberry.utils.blobToString(blob);
                 if(oldText.length>0){
-                    console.log('old text: ' + oldText);
                     newText = oldText.substr(0,me.position) + text + oldText.substr(me.position);
-                    console.log('newText: '+ newText);
                 }
             }
 
@@ -143,59 +138,6 @@ FileWriter.prototype.write = function(text) {
     if (typeof me.onwriteend === "function") {
                 me.onwriteend(new ProgressEvent("writeend", {"target":me}));
     }
-
-    /*
-    exec(
-        // Success callback
-        function(r) {
-            // If DONE (cancelled), then don't do anything
-            if (me.readyState === FileWriter.DONE) {
-                return;
-            }
-
-            // position always increases by bytes written because file would be extended
-            me.position += r;
-            // The length of the file is now where we are done writing.
-
-            me.length = me.position;
-
-            // DONE state
-            me.readyState = FileWriter.DONE;
-
-            // If onwrite callback
-            if (typeof me.onwrite === "function") {
-                me.onwrite(new ProgressEvent("write", {"target":me}));
-            }
-
-            // If onwriteend callback
-            if (typeof me.onwriteend === "function") {
-                me.onwriteend(new ProgressEvent("writeend", {"target":me}));
-            }
-        },
-        // Error callback
-        function(e) {
-            // If DONE (cancelled), then don't do anything
-            if (me.readyState === FileWriter.DONE) {
-                return;
-            }
-
-            // DONE state
-            me.readyState = FileWriter.DONE;
-
-            // Save error
-            me.error = new FileError(e);
-
-            // If onerror callback
-            if (typeof me.onerror === "function") {
-                me.onerror(new ProgressEvent("error", {"target":me}));
-            }
-
-            // If onwriteend callback
-            if (typeof me.onwriteend === "function") {
-                me.onwriteend(new ProgressEvent("writeend", {"target":me}));
-            }
-        }, "File", "write", [this.fileName, text, this.position]);
-    */
 };
 
 /**
@@ -255,56 +197,58 @@ FileWriter.prototype.truncate = function(size) {
     }
 
     // Write file
-    /*
-    exec(
-        // Success callback
-        function(r) {
-            // If DONE (cancelled), then don't do anything
-            if (me.readyState === FileWriter.DONE) {
-                return;
-            }
+    // TODO: Need to think about how to make this asynch and add try/catch
 
-            // DONE state
-            me.readyState = FileWriter.DONE;
+    if (typeof me.onwrite === "function") {
+        me.onwrite(new ProgressEvent("write", {"target":me}));
+    }
 
-            // Update the length of the file
-            me.length = r;
-            me.position = Math.min(me.position, r);
+    if(blackberry.io.file.exists(this.fileName)){
 
-            // If onwrite callback
-            if (typeof me.onwrite === "function") {
-                me.onwrite(new ProgressEvent("write", {"target":me}));
-            }
+        var oldText = '';
+        var newText = '';
 
-            // If onwriteend callback
-            if (typeof me.onwriteend === "function") {
-                me.onwriteend(new ProgressEvent("writeend", {"target":me}));
+        var getFileContents = function(path,blob){
+
+            if(blob){
+                oldText = blackberry.utils.blobToString(blob);
+                if(oldText.length>0){
+                    newText = oldText.slice(0,size);
+                }else{
+                    // TODO: throw error
+                }
             }
-        },
-        // Error callback
-        function(e) {
-            // If DONE (cancelled), then don't do anything
-            if (me.readyState === FileWriter.DONE) {
-                return;
+
+            var tempFile = me.fileName+'temp';
+            if(blackberry.io.file.exists(tempFile)){
+                blackberry.io.file.deleteFile(tempFile);
             }
 
-            // DONE state
-            me.readyState = FileWriter.DONE;
+            var newTextBlob = blackberry.utils.stringToBlob(newText);
 
-            // Save error
-            me.error = new FileError(e);
+            // crete a temp file, delete file we are 'overwriting', then rename temp file
+            blackberry.io.file.saveFile(tempFile, newTextBlob);
+            blackberry.io.file.deleteFile(me.fileName);
+            blackberry.io.file.rename(tempFile, me.fileName.split('/').pop());
 
-            // If onerror callback
-            if (typeof me.onerror === "function") {
-                me.onerror(new ProgressEvent("error", {"target":me}));
-            }
+            me.position = newText.length;
+            me.length = me.position;
+        }
+
+        // setting asynch to off - worry about making this all callbacks later
+        blackberry.io.file.readFile(this.fileName, getFileContents, false);
+
+    }else{
+
+        // TODO: file doesn't exist - throw error
 
-            // If onwriteend callback
-            if (typeof me.onwriteend === "function") {
+    }
+
+    me.readyState = FileWriter.DONE;
+
+    if (typeof me.onwriteend === "function") {
                 me.onwriteend(new ProgressEvent("writeend", {"target":me}));
-            }
-        }, "File", "truncate", [this.fileName, size]);
-    */
+    }
 };
 
 module.exports = FileWriter;


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