Added support of keyboard, mouse and clipboard events to DesktopSessionAgent.

BUG=134694


Review URL: https://chromiumcodereview.appspot.com/11417094

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@170393 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 69 insertions, 0 deletions

diff --git a/remoting/base/util.cc b/remoting/base/util.cc
index 77b1c5d..6e656bf 100644
--- a/remoting/base/util.cc
+++ b/remoting/base/util.cc
@@ -302,4 +302,36 @@ std::string ReplaceCrLfByLf(const std::string& in) {
   return out;
 }
 
+bool StringIsUtf8(const char* data, size_t length) {
+  const char* ptr = data;
+  const char* ptr_end = data + length;
+  while (ptr != ptr_end) {
+    if ((*ptr & 0x80) == 0) {
+      // Single-byte symbol.
+      ++ptr;
+    } else if ((*ptr & 0xc0) == 0x80 || (*ptr & 0xfe) == 0xfe) {
+      // Invalid first byte.
+      return false;
+    } else {
+      // First byte of a multi-byte symbol. The bits from 2 to 6 are the count
+      // of continuation bytes (up to 5 of them).
+      for (char first = *ptr << 1; first & 0x80; first <<= 1) {
+        ++ptr;
+
+        // Missing continuation byte.
+        if (ptr == ptr_end)
+          return false;
+
+        // Invalid continuation byte.
+        if ((*ptr & 0xc0) != 0x80)
+          return false;
+      }
+
+      ++ptr;
+    }
+  }
+
+  return true;
+}
+
 }  // namespace remoting
diff --git a/remoting/base/util.h b/remoting/base/util.h
index a628cb0..a627c92 100644
--- a/remoting/base/util.h
+++ b/remoting/base/util.h
@@ -96,6 +96,9 @@ std::string ReplaceLfByCrLf(const std::string& in);
 // Replaces every occurrence of "\r\n" in a string by "\n".
 std::string ReplaceCrLfByLf(const std::string& in);
 
+// Checks if the given string is a valid UTF-8 string.
+bool StringIsUtf8(const char* data, size_t length);
+
 }  // namespace remoting
 
 #endif  // REMOTING_BASE_UTIL_H_
diff --git a/remoting/base/util_unittest.cc b/remoting/base/util_unittest.cc
index 19579776..4fc190d 100644
--- a/remoting/base/util_unittest.cc
+++ b/remoting/base/util_unittest.cc
@@ -253,4 +253,38 @@ TEST(ReplaceCrLfByLfTest, Speed) {
   }
 }
 
+TEST(StringIsUtf8Test, Basic) {
+  EXPECT_TRUE(StringIsUtf8("", 0));
+  EXPECT_TRUE(StringIsUtf8("\0", 1));
+  EXPECT_TRUE(StringIsUtf8("abc", 3));
+  EXPECT_TRUE(StringIsUtf8("\xc0\x80", 2));
+  EXPECT_TRUE(StringIsUtf8("\xe0\x80\x80", 3));
+  EXPECT_TRUE(StringIsUtf8("\xf0\x80\x80\x80", 4));
+  EXPECT_TRUE(StringIsUtf8("\xf8\x80\x80\x80\x80", 5));
+  EXPECT_TRUE(StringIsUtf8("\xfc\x80\x80\x80\x80\x80", 6));
+
+  // Not enough continuation characters
+  EXPECT_FALSE(StringIsUtf8("\xc0", 1));
+  EXPECT_FALSE(StringIsUtf8("\xe0\x80", 2));
+  EXPECT_FALSE(StringIsUtf8("\xf0\x80\x80", 3));
+  EXPECT_FALSE(StringIsUtf8("\xf8\x80\x80\x80", 4));
+  EXPECT_FALSE(StringIsUtf8("\xfc\x80\x80\x80\x80", 5));
+
+  // One more continuation character than needed
+  EXPECT_FALSE(StringIsUtf8("\xc0\x80\x80", 3));
+  EXPECT_FALSE(StringIsUtf8("\xe0\x80\x80\x80", 4));
+  EXPECT_FALSE(StringIsUtf8("\xf0\x80\x80\x80\x80", 5));
+  EXPECT_FALSE(StringIsUtf8("\xf8\x80\x80\x80\x80\x80", 6));
+  EXPECT_FALSE(StringIsUtf8("\xfc\x80\x80\x80\x80\x80\x80", 7));
+
+  // Invalid first byte
+  EXPECT_FALSE(StringIsUtf8("\xfe\x80\x80\x80\x80\x80\x80", 7));
+  EXPECT_FALSE(StringIsUtf8("\xff\x80\x80\x80\x80\x80\x80", 7));
+
+  // Invalid continuation byte
+  EXPECT_FALSE(StringIsUtf8("\xc0\x00", 2));
+  EXPECT_FALSE(StringIsUtf8("\xc0\x40", 2));
+  EXPECT_FALSE(StringIsUtf8("\xc0\xc0", 2));
+}
+
 }  // namespace remoting