Consider Zoom factor when getting bounding rect.

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

 /*
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 76 matching lines @@
 #include "public/web/WebWidget.h"
 #include "public/web/WebWidgetClient.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "web/WebLocalFrameImpl.h"
 #include "web/WebSettingsImpl.h"
 #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;
 using blink::testing::runPendingTasks;
 
 namespace blink {
 
 enum HorizontalScrollbarState {
     NoHorizontalScrollbar,
     VisibleHorizontalScrollbar,
@@ skipping 3069 matching lines @@
 
     WebFrame* frame = mainWebView.webView()->mainFrame();
     v8::HandleScope scope(v8::Isolate::GetCurrent());
     v8::Local<v8::Value> v8Value = frame->executeScriptAndReturnValue(WebScriptSource("var win = window.open('javascript:false'); win.document"));
     ASSERT_TRUE(v8Value->IsObject());
     Document* document = V8Document::toImplWithTypeCheck(v8::Isolate::GetCurrent(), v8Value);
     ASSERT_TRUE(document);
     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