nsprogressdialog.js

从国外的站点上淘的个人财务管理系统．开源．

                // defer the handling of this call.
                this.dialog.setTimeout( function(obj,wp,req,stat,msg){obj.onStatusChange(wp,req,stat,msg)},
                                        100, this, aWebProgress, aRequest, aStatus, aMessage );
            }
        }
    },

    // Ignore onLocationChange and onSecurityChange notifications.
    onLocationChange: function( aWebProgress, aRequest, aLocation ) {
    },

    onSecurityChange: function( aWebProgress, aRequest, state ) {
    },

    // ---------- nsIObserver methods ----------
    observe: function( anObject, aTopic, aData ) {
        // Something of interest occured on the dialog.
        // Dispatch to corresponding implementation method.
        switch ( aTopic ) {
        case "onload":
            this.onLoad();
            break;
        case "oncancel":
            this.onCancel();
            break;
        case "onpause":
            this.onPause();
            break;
        case "onlaunch":
            this.onLaunch();
            break;
        case "onreveal":
            this.onReveal();
            break;
        case "onunload":
            this.onUnload();
            break;
        case "oncompleted":
            // This event comes in when setCompleted needs to be deferred because
            // the dialog isn't loaded yet.
            this.completed = true;
            break;
        default:
            break;
        }
    },

    // ---------- nsISupports methods ----------

    // This "class" supports nsIProgressDialog, nsIWebProgressListener (by virtue
    // of interface inheritance), nsIObserver, and nsISupports.
    QueryInterface: function (iid) {
        if (iid.equals(Components.interfaces.nsIProgressDialog) ||
            iid.equals(Components.interfaces.nsIDownload) ||
            iid.equals(Components.interfaces.nsITransfer) ||
            iid.equals(Components.interfaces.nsIWebProgressListener) ||
            iid.equals(Components.interfaces.nsIWebProgressListener2) ||
            iid.equals(Components.interfaces.nsIObserver) ||
            iid.equals(Components.interfaces.nsIInterfaceRequestor) ||
            iid.equals(Components.interfaces.nsISupports))
            return this;

        Components.returnCode = Components.results.NS_ERROR_NO_INTERFACE;
        return null;
    },

    // ---------- nsIInterfaceRequestor methods ----------

    getInterface: function(iid) {
        if (iid.equals(Components.interfaces.nsIPrompt) ||
            iid.equals(Components.interfaces.nsIAuthPrompt)) {
            // use the window watcher service to get a nsIPrompt/nsIAuthPrompt impl
            var ww = Components.classes["@mozilla.org/embedcomp/window-watcher;1"]
                               .getService(Components.interfaces.nsIWindowWatcher);
            var prompt;
            if (iid.equals(Components.interfaces.nsIPrompt))
                prompt = ww.getNewPrompter(this.parent);
            else
                prompt = ww.getNewAuthPrompter(this.parent);
            return prompt;
        }
        Components.returnCode = Components.results.NS_ERROR_NO_INTERFACE;
        return null;
    },

    // ---------- implementation methods ----------

    // Initialize the dialog.
    onLoad: function() {
        // Note that onLoad has finished.
        this.loaded = true;

        // Fill dialog.
        this.loadDialog();

        // Position dialog.
        if ( this.dialog.opener ) {
            this.dialog.moveToAlertPosition();
        } else {
            this.dialog.centerWindowOnScreen();
        }

        // Set initial focus on "keep open" box.  If that box is hidden, or, if
        // the download is already complete, then focus is on the cancel/close
        // button.  The download may be complete if it was really short and the
        // dialog took longer to open than to download the data.
        if ( !this.completed && !this.saving ) {
            this.dialogElement( "keep" ).focus();
        } else {
            this.dialogElement( "cancel" ).focus();
        }
    },

    // load dialog with initial contents
    loadDialog: function() {
        // Check whether we're saving versus opening with a helper app.
        if ( !this.saving ) {
            // Put proper label on source field.
            this.setValue( "sourceLabel", this.getString( "openingSource" ) );

            // Target is the "preferred" application.  Hide if empty.
            if ( this.MIMEInfo && this.MIMEInfo.preferredApplicationHandler ) {
                var appName = this.MIMEInfo.preferredApplicationHandler.leafName;
                if ( appName == null || appName.length == 0 ) {
                    this.hide( "targetRow" );
                } else {
                    // Use the "with:" label.
                    this.setValue( "targetLabel", this.getString( "openingTarget" ) );
                    // Name of application.
                    this.setValue( "target", appName );
                }
           } else {
               this.hide( "targetRow" );
           }
        } else {
            // If target is not a local file, then hide extra dialog controls.
            if (this.targetFile != null) {
                this.setValue( "target", this.targetFile.path );
            } else {
                this.setValue( "target", this.target.spec );
                this.hide( "pauseResume" );
                this.hide( "launch" );
                this.hide( "reveal" );
            }
        }

        // Set source field.
        this.setValue( "source", this.source.spec );

        var now = ( new Date() ).getTime();

        // Intialize the elapsed time.
        if ( !this.elapsed ) {
            this.elapsed = now - this.startTime;
        }

        // Update elapsed time display.
        this.setValue( "timeElapsed", this.formatSeconds( this.elapsed / 1000 ) );
        this.setValue( "timeLeft", this.getString( "unknownTime" ) );

        // Initialize the "keep open" box.  Hide this if we're opening a helper app
        // or if we are uploading.
        if ( !this.saving || !this.targetFile ) {
            // Hide this in this case.
            this.hide( "keep" );
        } else {
            // Initialize using last-set value from prefs.
            var prefs = Components.classes[ "@mozilla.org/preferences-service;1" ]
                            .getService( Components.interfaces.nsIPrefBranch );
            if ( prefs ) {
                this.dialogElement( "keep" ).checked = prefs.getBoolPref( "browser.download.progressDnldDialog.keepAlive" );
            }
        }

        // Initialize title.
        this.setTitle();
    },

    // Cancel button stops the download (if not completed),
    // and closes the dialog.
    onCancel: function() {
        // Cancel the download, if not completed.
        if ( !this.completed ) {
            if ( this.operation ) {
                const NS_BINDING_ABORTED = 0x804b0002;
                this.operation.cancel(NS_BINDING_ABORTED);
                // XXX We're supposed to clean up files/directories.
            }
            if ( this.observer ) {
                this.observer.observe( this, "oncancel", "" );
            }
            this.paused = false;
        }
        // Test whether the dialog is already closed.
        // This will be the case if we've come through onUnload.
        if ( this.dialog ) {
            // Close the dialog.
            this.dialog.close();
        }
    },

    // onunload event means the dialog has closed.
    // We go through our onCancel logic to stop the download if still in progress.
    onUnload: function() {
        // Remember "keep dialog open" setting, if visible.
        if ( this.saving ) {
            var prefs = Components.classes["@mozilla.org/preferences-service;1"]
                          .getService( Components.interfaces.nsIPrefBranch );
            if ( prefs ) {
                prefs.setBoolPref( "browser.download.progressDnldDialog.keepAlive", this.dialogElement( "keep" ).checked );
            }
         }
         this.dialog = null; // The dialog is history.
         if ( this.mCancelDownloadOnClose ) {
             this.onCancel();
         }
    },

    // onpause event means the user pressed the pause/resume button
    // Toggle the pause/resume state (see the function setPause(), below).i
    onPause: function() {
         this.paused = !this.paused;
    },

    // onlaunch event means the user pressed the launch button
    // Invoke the launch method of the target file.
    onLaunch: function() {
         try {
           const kDontAskAgainPref  = "browser.download.progressDnlgDialog.dontAskForLaunch";
           try {
             var pref = Components.classes["@mozilla.org/preferences-service;1"]
                              .getService(Components.interfaces.nsIPrefBranch);
             var dontAskAgain = pref.getBoolPref(kDontAskAgainPref);
           } catch (e) {
             // we need to ask if we're unsure
             dontAskAgain = false;
           }
           if ( !dontAskAgain && this.targetFile.isExecutable() ) {
             try {
               var promptService = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
                                               .getService( Components.interfaces.nsIPromptService );
             } catch (ex) {
               // getService doesn't return null, it throws
               return;
             }
             var title = this.getProperty( "openingAlertTitle",
                                           [ this.fileName() ],
                                           1 );
             var msg = this.getProperty( "securityAlertMsg",
                                         [ this.fileName() ],
                                         1 );
             var dontaskmsg = this.getProperty( "dontAskAgain",
                                                [ ], 0 );
             var checkbox = {value:0};
             var okToProceed = promptService.confirmCheck(this.dialog, title, msg, dontaskmsg, checkbox);
             try {
               if (checkbox.value != dontAskAgain)
                 pref.setBoolPref(kDontAskAgainPref, checkbox.value);
             } catch (ex) {}

             if ( !okToProceed )
               return;
           }
           this.targetFile.launch();
           this.dialog.close();
         } catch ( exception ) {
             // XXX Need code here to tell user the launch failed!
             dump( "nsProgressDialog::onLaunch failed: " + exception + "\n" );
         }
    },

    // onreveal event means the user pressed the "reveal location" button
    // Invoke the reveal method of the target file.
    onReveal: function() {
         try {
             this.targetFile.reveal();
             this.dialog.close();
         } catch ( exception ) {
         }
    },

    // Get filename from the target.
    fileName: function() {
        if ( this.targetFile != null )
            return this.targetFile.leafName;
        try {
            var escapedFileName = this.target.QueryInterface(nsIURL).fileName;
            var textToSubURI = Components.classes["@mozilla.org/intl/texttosuburi;1"]
                                         .getService(nsITextToSubURI);
            return textToSubURI.unEscapeURIForUI(this.target.originCharset, escapedFileName);
        } catch (e) {}
        return "";
    },

    // Set the dialog title.
    setTitle: function() {
        // Start with saving/opening template.
        // If percentage is not known (-1), use alternate template
        var title = this.saving
            ? ( this.percent != -1 ? this.getString( "savingTitle" ) : this.getString( "unknownSavingTitle" ) )
            : ( this.percent != -1 ? this.getString( "openingTitle" ) : this.getString( "unknownOpeningTitle" ) );


        // Use file name as insert 1.
        title = this.replaceInsert( title, 1, this.fileName() );

        // Use percentage as insert 2 (if known).
        if ( this.percent != -1 ) {
            title = this.replaceInsert( title, 2, this.percent );
        }

        // Set dialog's title property.
        if ( this.dialog ) {
            this.dialog.document.title = title;
        }
    },