Sharing on Facebook, Twitter and Google+

[FIXED]     Font of navbar.
[FIXED]     A few compile fixes.
[IMPROVED]  Made properties nonatomic.
[ADDED]     Support for facebook, twitter and google+ sharing.

External/google-plus-ios-sdk/OpenSource/GTMMethodCheck.m

@@ -0,0 +1,161 @@
+//
+//  GTMMethodCheck.m
+//
+//  Copyright 2006-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+// Don't want any of this in release builds
+#ifdef DEBUG
+#import "GTMDefines.h"
+#import "GTMMethodCheck.h"
+#import "GTMObjC2Runtime.h"
+#import <dlfcn.h>
+
+// Checks to see if the cls passed in (or one of it's superclasses) conforms
+// to NSObject protocol. Inheriting from NSObject is the easiest way to do this
+// but not all classes (i.e. NSProxy) inherit from NSObject. Also, some classes
+// inherit from Object instead of NSObject which is fine, and we'll count as
+// conforming to NSObject for our needs.
+static BOOL ConformsToNSObjectProtocol(Class cls) {
+  // If we get nil, obviously doesn't conform.
+  if (!cls) return NO;
+  const char *className = class_getName(cls);
+  if (!className) return NO;
+
+  // We're going to assume that all Apple classes will work
+  // (and aren't being checked)
+  // Note to apple: why doesn't obj-c have real namespaces instead of two
+  // letter hacks? If you name your own classes starting with NS this won't
+  // work for you.
+  // Some classes (like _NSZombie) start with _NS.
+  // On Leopard we have to look for CFObject as well.
+  // On iPhone we check Object as well
+  if ((strncmp(className, "NS", 2) == 0)
+       || (strncmp(className, "_NS", 3) == 0)
+       || (strncmp(className, "__NS", 4) == 0)
+       || (strcmp(className, "CFObject") == 0)
+       || (strcmp(className, "__IncompleteProtocol") == 0)
+#if GTM_IPHONE_SDK
+       || (strcmp(className, "Object") == 0)
+#endif
+    ) {
+    return YES;
+  }
+
+// iPhone SDK does not define the |Object| class, so we instead test for the
+// |NSObject| class.
+#if GTM_IPHONE_SDK
+  // Iterate through all the protocols |cls| supports looking for NSObject.
+  if (cls == [NSObject class]
+      || class_conformsToProtocol(cls, @protocol(NSObject))) {
+    return YES;
+  }
+#else
+  // Iterate through all the protocols |cls| supports looking for NSObject.
+  if (cls == [Object class]
+      || class_conformsToProtocol(cls, @protocol(NSObject))) {
+    return YES;
+  }
+#endif
+
+  // Recursively check the superclasses.
+  return ConformsToNSObjectProtocol(class_getSuperclass(cls));
+}
+
+void GTMMethodCheckMethodChecker(void) {
+  // Run through all the classes looking for class methods that are
+  // prefixed with xxGMMethodCheckMethod. If it finds one, it calls it.
+  // See GTMMethodCheck.h to see what it does.
+  NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
+  int numClasses = 0;
+  int newNumClasses = objc_getClassList(NULL, 0);
+  int i;
+  Class *classes = NULL;
+  while (numClasses < newNumClasses) {
+    numClasses = newNumClasses;
+    classes = realloc(classes, sizeof(Class) * numClasses);
+    _GTMDevAssert(classes, @"Unable to allocate memory for classes");
+    newNumClasses = objc_getClassList(classes, numClasses);
+  }
+  for (i = 0; i < numClasses && classes; ++i) {
+    Class cls = classes[i];
+
+    // Since we are directly calling objc_msgSend, we need to conform to
+    // @protocol(NSObject), or else we will tumble into a _objc_msgForward
+    // recursive loop when we try and call a function by name.
+    if (!ConformsToNSObjectProtocol(cls)) {
+      // COV_NF_START
+      _GTMDevLog(@"GTMMethodCheckMethodChecker: Class %s does not conform to "
+                 "@protocol(NSObject), so won't be checked",
+                 class_getName(cls));
+      continue;
+      // COV_NF_END
+    }
+    // Since we are looking for a class method (+xxGMMethodCheckMethod...)
+    // we need to query the isa pointer to see what methods it support, but
+    // send the method (if it's supported) to the class itself.
+    unsigned int count;
+    Class metaClass = objc_getMetaClass(class_getName(cls));
+    Method *methods = class_copyMethodList(metaClass, &count);
+    unsigned int j;
+    for (j = 0; j < count; ++j) {
+      SEL selector = method_getName(methods[j]);
+      const char *name = sel_getName(selector);
+      if (strstr(name, "xxGTMMethodCheckMethod") == name) {
+        // Check to make sure that the method we are checking comes
+        // from the same image that we are in. Since GTMMethodCheckMethodChecker
+        // is not exported, we should always find the copy in our local
+        // image. We compare the address of it's image with the address of
+        // the image which implements the method we want to check. If
+        // they match we continue. This does two things:
+        // a) minimizes the amount of calls we make to the xxxGTMMethodCheck
+        //    methods. They should only be called once.
+        // b) prevents initializers for various classes being called too early
+        Dl_info methodCheckerInfo;
+        if (!dladdr(GTMMethodCheckMethodChecker,
+                    &methodCheckerInfo)) {
+          // COV_NF_START
+          // Don't know how to force this case in a unittest.
+          // Certainly hope we never see it.
+          _GTMDevLog(@"GTMMethodCheckMethodChecker: Unable to get dladdr info "
+                "for GTMMethodCheckMethodChecker while introspecting +[%s %s]]",
+                class_getName(cls), name);
+          continue;
+          // COV_NF_END
+        }
+        Dl_info methodInfo;
+        if (!dladdr(method_getImplementation(methods[j]),
+                    &methodInfo)) {
+          // COV_NF_START
+          // Don't know how to force this case in a unittest
+          // Certainly hope we never see it.
+          _GTMDevLog(@"GTMMethodCheckMethodChecker: Unable to get dladdr info "
+                     "for %s while introspecting +[%s %s]]", name,
+                     class_getName(cls), name);
+          continue;
+          // COV_NF_END
+        }
+        if (methodCheckerInfo.dli_fbase == methodInfo.dli_fbase) {
+          objc_msgSend(cls, selector);
+        }
+      }
+    }
+    free(methods);
+  }
+  free(classes);
+  [pool drain];
+}
+
+#endif  // DEBUG