jcs.org
an experiment in making a cocoa webkit browser manageable under X11
implement WebUIDelegate methods for javascript alert() and confirm()
sheets are nicer than panels because they stay with the window
rather than pop up alert boxes that get placed in the middle of the
screen
however, sheets return right away and use callbacks to return the
result, but since javascript apps expect the dialog to block until a
response, we have to block after the sheet is put up
to get around this, make the callback just set a variable
sheetResponse, which a while loop waits for and blocks until it
gets, which it can then return to javascript
+4
WKWindow.h
+4
WKWindow.h
···
21
21
int resourceCount;
22
22
int resourceCompletedCount;
23
23
int resourceFailedCount;
24
+
25
+
int sheetResponse;
24
26
}
25
27
26
28
- (void)setPosition:(NSArray *)aCoords;
···
30
32
- (void)setTitle:(NSString *)text;
31
33
- (void)loadURL:(NSString *)url;
32
34
- (void)loadURLFromTextField;
35
+
36
+
- (void)handleSheetResponse:(NSWindow *)sheet returnCode:(int)returnCode contextInfo:(void *)contextInfo;
33
37
34
38
@end
+57
WKWindow.m
+57
WKWindow.m
···
230
230
[self setStatusToResourceCounts];
231
231
}
232
232
233
+
233
234
/* WebUIDelegate glue */
235
+
236
+
- (void)webView:(WebView *)sender runJavaScriptAlertPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame
237
+
{
238
+
sheetResponse = -1;
239
+
240
+
NSBeginInformationalAlertSheet(
241
+
[currentURL absoluteString],
242
+
nil,
243
+
nil,
244
+
nil,
245
+
[sender window],
246
+
self,
247
+
@selector(handleSheetResponse:returnCode:contextInfo:),
248
+
nil,
249
+
nil,
250
+
message);
251
+
252
+
/* block until the user responds */
253
+
while (sheetResponse == -1)
254
+
[NSApp sendEvent:[NSApp nextEventMatchingMask:NSAnyEventMask
255
+
untilDate:[NSDate distantFuture]
256
+
inMode:NSModalPanelRunLoopMode dequeue:YES]];
257
+
}
258
+
259
+
- (BOOL)webView:(WebView *)sender runJavaScriptConfirmPanelWithMessage:(NSString *)message initiatedByFrame:(WebFrame *)frame
260
+
{
261
+
sheetResponse = -1;
262
+
263
+
NSBeginInformationalAlertSheet(
264
+
NSLocalizedString(@"JavaScript", @""),
265
+
NSLocalizedString(@"OK", @""),
266
+
NSLocalizedString(@"Cancel", @""),
267
+
nil,
268
+
[sender window],
269
+
self,
270
+
@selector(handleSheetResponse:returnCode:contextInfo:),
271
+
nil,
272
+
nil,
273
+
message);
274
+
275
+
/* block until the user responds */
276
+
while (sheetResponse == -1)
277
+
[NSApp sendEvent:[NSApp nextEventMatchingMask:NSAnyEventMask
278
+
untilDate:[NSDate distantFuture]
279
+
inMode:NSModalPanelRunLoopMode dequeue:YES]];
280
+
281
+
if (sheetResponse == NSAlertDefaultReturn)
282
+
return YES;
283
+
else
284
+
return NO;
285
+
}
286
+
287
+
- (void)handleSheetResponse:(NSWindow *)sheet returnCode:(int)returnCode contextInfo:(void *)contextInfo
288
+
{
289
+
sheetResponse = returnCode;
290
+
}
234
291
235
292
@end