Consider Zoom factor when getting bounding rect.

third_party/WebKit/Source/web/tests/WebViewTest.cpp

Index: third_party/WebKit/Source/web/tests/WebViewTest.cpp
diff --git a/third_party/WebKit/Source/web/tests/WebViewTest.cpp b/third_party/WebKit/Source/web/tests/WebViewTest.cpp
index ff330cdf7300e65f08184913904f6fa42c02805b..b3390cb0100dd04ae21d262631f4d0ca147321aa 100644
--- a/third_party/WebKit/Source/web/tests/WebViewTest.cpp
+++ b/third_party/WebKit/Source/web/tests/WebViewTest.cpp
@@ -94,6 +94,10 @@
 #include "web/WebViewImpl.h"
 #include "web/tests/FrameTestHelpers.h"
 
+#if OS(MACOSX)
+#include "public/web/mac/WebSubstringUtil.h"
+#endif
+
 using blink::FrameTestHelpers::loadFrame;
 using blink::URLTestHelpers::toKURL;
 using blink::URLTestHelpers::registerMockedURLLoad;
@@ -3183,4 +3187,25 @@ TEST_F(WebViewTest, StopLoadingIfJavaScriptURLReturnsNoStringResult)
     EXPECT_FALSE(document->frame()->isLoading());
 }
 
+#if OS(MACOSX)
+TEST_F(WebViewTest, WebSubstringUtil)
+{
+    URLTestHelpers::registerMockedURLFromBaseURL(WebString::fromUTF8(m_baseURL.c_str()), WebString::fromUTF8("content_editable_populated.html"));
+    WebView* webView = m_webViewHelper.initializeAndLoad(m_baseURL + "content_editable_populated.html");

[keishi, 2016/01/27 13:08:39]

Looks like the font size is 1px because the default font size isn't set.

Add this here:
webView->settings()->setDefaultFontSize(12);

[Shu Chen, 2016/01/27 13:58:28]

Thanks, keishi@. Now I want to test for page is zoomed (e.g. by Ctrl+"+").
How can I make the web view zoom'ed? Is it setZoomLevel() or
setTextScaleFactor()?

+    webView->resize(WebSize(400, 400));
+    WebLocalFrame* frame = toWebLocalFrameImpl(webView->mainFrame());
+    LocalFrame* localFrame = toWebLocalFrameImpl(frame)->frame();
+    localFrame->view()->layout();
+
+    WebPoint baselinePoint;
+    NSAttributedString* result = WebSubstringUtil::attributedSubstringInRange(frame, 10, 3, &baselinePoint);
+    ASSERT_TRUE(!!result);
+    printf("=====baseline: %d, %d\n", baselinePoint.x, baselinePoint.y);
+
+    WebPoint point(baselinePoint.x, localFrame->view()->height() - baselinePoint.y);
+    result = WebSubstringUtil::attributedWordAtPoint(webView, point, baselinePoint);
+    ASSERT_TRUE(!!result);
+}
+#endif
+
 } // namespace blink