/* * Copyright (C) 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 * copyright notice, this list of conditions and the following disclaimer * in the documentation and/or other materials provided with the * distribution. * * Neither the name of Google Inc. nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef FindInPageCoordinates_h #define FindInPageCoordinates_h #include "platform/geometry/FloatRect.h" #include "web/WebExport.h" namespace blink { class Range; class LayoutObject; // Find-in-page coordinate conversion methods. // // This coordinate system is designed to give consistent tickmarks in cases where find matches // are in scrollable areas but might not be visible (e.g. child frames, scroll:overflow). // In these cases, using absolute positions might lead to tickmarks pointing outside the visible // area of its container, which is counter-intuitive for users. // // Find-in-page coordinates are represented as normalized fractions of the main frame document with // the property that they are built by composing the relative position of each layoutObject to the maximum // effective layout size of its container all the way up the layout tree. The resulting coordinates // are scroll-independent, representing any contents scaled to the visible area of their container. // The provided methods support scroll:overflow and are CSS position and transform-friendly. WEB_EXPORT FloatRect findInPageRectFromAbsoluteRect(const FloatRect&, const LayoutObject*); WEB_EXPORT FloatRect findInPageRectFromRange(Range*); } // namespace blink #endif