1 /*

     2  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.

     3  * Copyright (C) 2006 Alexey Proskuryakov (ap@nypop.com)

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions

     7  * are met:

     8  *

     9  * 1.  Redistributions of source code must retain the above copyright

    10  *     notice, this list of conditions and the following disclaimer. 

    11  * 2.  Redistributions in binary form must reproduce the above copyright

    12  *     notice, this list of conditions and the following disclaimer in the

    13  *     documentation and/or other materials provided with the distribution. 

    14  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of

    15  *     its contributors may be used to endorse or promote products derived

    16  *     from this software without specific prior written permission. 

    17  *

    18  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY

    19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

    20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

    21  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY

    22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

    23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

    24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

    25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

    26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

    27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    28  */

    29 

    30 #import "AppleScriptController.h"

    31 

    32 #import <WebKit/WebView.h>

    33 #import <WebKit/WebViewPrivate.h>   // for aeDescByEvaluatingJavaScriptFromString, which is pending API review

    34 

    35 @implementation AppleScriptController

    36 

    37 + (BOOL)isSelectorExcludedFromWebScript:(SEL)aSelector

    38 {

    39     if (aSelector == @selector(doJavaScript:))

    40         return NO;

    41     return YES;

    42 }

    43 

    44 + (NSString *)webScriptNameForSelector:(SEL)aSelector

    45 {

    46     if (aSelector == @selector(doJavaScript:))

    47         return @"doJavaScript";

    48 

    49     return nil;

    50 }

    51 

    52 - (id)initWithWebView:(WebView *)wv

    53 {

    54     self = [super init];

    55     webView = wv;

    56     return self;

    57 }

    58 

    59 static id convertAEDescToObject(NSAppleEventDescriptor *aeDesc)

    60 {

    61     id value = nil;

    62 

    63     DescType descType = [aeDesc descriptorType];

    64     switch (descType) {

    65         case typeUnicodeText:

    66             value = [NSString stringWithFormat:@"\"%@\"", [aeDesc stringValue]];

    67             break;

    68         case typeLongDateTime:

    69             if ([[aeDesc data] length] == sizeof(LongDateTime)) {

    70                 LongDateTime d;

    71                 [[aeDesc data] getBytes:&d];

    72                 value = [NSString stringWithFormat:@"%016llX", (unsigned long long)d];

    73             }

    74             break;

    75         case typeAEList:

    76             value = [NSMutableString stringWithString:@"("];

    77             int numItems = [aeDesc numberOfItems];

    78             for (int i = 0; i < numItems; ++i) {

    79                 if (i != 0)

    80                     [(NSMutableString*)value appendString:@", "];

    81                 id obj = convertAEDescToObject([aeDesc descriptorAtIndex:(i + 1)]);

    82                 [(NSMutableString*)value appendString:[obj description]];

    83             }

    84             [(NSMutableString*)value appendString:@")"];

    85             break;

    86         case typeType: {

    87             OSType type = [aeDesc typeCodeValue];

    88 

    89             char typeStr[5];

    90             typeStr[0] = type >> 24;

    91             typeStr[1] = type >> 16;

    92             typeStr[2] = type >> 8;

    93             typeStr[3] = type;

    94             typeStr[4] = 0;

    95 

    96             value = [NSString stringWithFormat:@"'%s'", typeStr];

    97             break;

    98         }

    99     }

   100 

   101     if (!value)

   102         value = [aeDesc stringValue];

   103     if (!value)

   104         value = [aeDesc data];

   105 

   106     return value;

   107 }

   108 

   109 - (NSString *)doJavaScript:(NSString *)aString

   110 {

   111     NSAppleEventDescriptor *aeDesc = [webView aeDescByEvaluatingJavaScriptFromString:aString];

   112     if (!aeDesc)

   113         return @"(null)";

   114     

   115     DescType descType = [aeDesc descriptorType];

   116     char descTypeStr[5];

   117     descTypeStr[0] = descType >> 24;

   118     descTypeStr[1] = descType >> 16;

   119     descTypeStr[2] = descType >> 8;

   120     descTypeStr[3] = descType;

   121     descTypeStr[4] = 0;

   122 

   123     return [NSString stringWithFormat:@"%@ ('%s')", convertAEDescToObject(aeDesc), descTypeStr];

   124 }

   125 

   126 @end