| /* |
| * Copyright (C) 2005, 2007, 2008 Apple Inc. All rights reserved. |
| * Copyright (C) 2011 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. |
| */ |
| |
| #include "third_party/blink/renderer/core/editing/substring_util.h" |
| |
| #import <Cocoa/Cocoa.h> |
| |
| #include "base/apple/bridging.h" |
| #include "base/apple/scoped_cftyperef.h" |
| #include "third_party/blink/renderer/core/css/properties/longhands.h" |
| #include "third_party/blink/renderer/core/dom/document.h" |
| #include "third_party/blink/renderer/core/dom/element.h" |
| #include "third_party/blink/renderer/core/dom/node.h" |
| #include "third_party/blink/renderer/core/editing/editor.h" |
| #include "third_party/blink/renderer/core/editing/ephemeral_range.h" |
| #include "third_party/blink/renderer/core/editing/frame_selection.h" |
| #include "third_party/blink/renderer/core/editing/iterators/text_iterator.h" |
| #include "third_party/blink/renderer/core/editing/plain_text_range.h" |
| #include "third_party/blink/renderer/core/editing/selection_template.h" |
| #include "third_party/blink/renderer/core/editing/visible_selection.h" |
| #include "third_party/blink/renderer/core/editing/visible_units.h" |
| #include "third_party/blink/renderer/core/frame/local_frame.h" |
| #include "third_party/blink/renderer/core/frame/local_frame_view.h" |
| #include "third_party/blink/renderer/core/frame/visual_viewport.h" |
| #include "third_party/blink/renderer/core/frame/web_frame_widget_impl.h" |
| #include "third_party/blink/renderer/core/html/html_element.h" |
| #include "third_party/blink/renderer/core/layout/hit_test_result.h" |
| #include "third_party/blink/renderer/core/layout/layout_object.h" |
| #include "third_party/blink/renderer/core/page/page.h" |
| #include "third_party/blink/renderer/core/style/computed_style.h" |
| #include "third_party/blink/renderer/platform/fonts/font.h" |
| #include "third_party/blink/renderer/platform/mac/color_mac.h" |
| |
| namespace blink { |
| |
| namespace { |
| |
| NSString* const kCrBaselineOffset = @"kCrBaselineOffset"; |
| |
| NSAttributedString* AttributedSubstringFromRange(LocalFrame* frame, |
| const EphemeralRange& range) { |
| NSMutableAttributedString* string = [[NSMutableAttributedString alloc] init]; |
| NSMutableDictionary* attrs = [NSMutableDictionary dictionary]; |
| size_t length = range.EndPosition().ComputeOffsetInContainerNode() - |
| range.StartPosition().ComputeOffsetInContainerNode(); |
| |
| unsigned position = 0; |
| |
| // TODO(editing-dev): The use of updateStyleAndLayout |
| // needs to be audited. see http://crbug.com/590369 for more details. |
| range.StartPosition().GetDocument()->UpdateStyleAndLayout( |
| DocumentUpdateReason::kEditing); |
| |
| for (TextIterator it(range.StartPosition(), range.EndPosition()); |
| !it.AtEnd() && [string length] < length; it.Advance()) { |
| unsigned num_characters = it.length(); |
| if (!num_characters) { |
| continue; |
| } |
| |
| const Node& container = it.CurrentContainer(); |
| const LayoutObject* layout_object = container.GetLayoutObject(); |
| if (!layout_object) { |
| continue; |
| } |
| |
| // There are two ways that the size of text can be affected by the user. One |
| // is the page scale factor, which is what the user changes by pinching on |
| // the trackpad. The other is zooming, which combines 1. the effect of users |
| // using ⌘+/⌘- and 2. implementing the device scale factor (this is an |
| // implementation feature called "zoom-for-dsf"). The zoom value is baked |
| // into the font size, so to calculate the font size needed for display, the |
| // device scale factor must be divided out from the font size and the page |
| // scale factor must be multiplied in. |
| |
| const ComputedStyle* style = layout_object->Style(); |
| const SimpleFontData* primaryFont = style->GetFont().PrimaryFont(); |
| const FontPlatformData& font_platform_data = primaryFont->PlatformData(); |
| |
| const float page_scale_factor = frame->GetPage()->PageScaleFactor(); |
| const float device_scale_factor = |
| frame->GetWidgetForLocalRoot()->DIPsToBlinkSpace(1.0f); |
| |
| attrs[kCrBaselineOffset] = |
| @(primaryFont->GetFontMetrics().Descent() * page_scale_factor); |
| |
| NSFont* original_font = |
| base::apple::CFToNSPtrCast(font_platform_data.CtFont()); |
| const CGFloat desired_size = |
| font_platform_data.size() * page_scale_factor / device_scale_factor; |
| |
| NSFont* font = nil; |
| if (original_font) { |
| font = [original_font fontWithSize:desired_size]; |
| } |
| |
| // If the platform font can't be loaded, or the size is incorrect comparing |
| // to the computed style, it's likely that the site is using a web font. |
| // For now, just use the default font instead. |
| // TODO(rsesek): Change the font activation flags to allow other processes |
| // to use the font. |
| // TODO(shuchen): Support scaling the font as necessary according to CSS |
| // transforms, not just pinch-zoom. |
| if (!font || floor(font_platform_data.size()) != |
| floor(original_font.fontDescriptor.pointSize)) { |
| font = [NSFont systemFontOfSize:style->GetFont() |
| .GetFontDescription() |
| .ComputedSize() * |
| page_scale_factor / device_scale_factor]; |
| } |
| attrs[NSFontAttributeName] = font; |
| |
| if (!style->VisitedDependentColor(GetCSSPropertyColor()) |
| .IsFullyTransparent()) { |
| attrs[NSForegroundColorAttributeName] = |
| NsColor(style->VisitedDependentColor(GetCSSPropertyColor())); |
| } else { |
| [attrs removeObjectForKey:NSForegroundColorAttributeName]; |
| } |
| if (!style->VisitedDependentColor(GetCSSPropertyBackgroundColor()) |
| .IsFullyTransparent()) { |
| attrs[NSBackgroundColorAttributeName] = NsColor( |
| style->VisitedDependentColor(GetCSSPropertyBackgroundColor())); |
| } else { |
| [attrs removeObjectForKey:NSBackgroundColorAttributeName]; |
| } |
| |
| NSString* substring = it.GetTextState().GetTextForTesting(); |
| [string replaceCharactersInRange:NSMakeRange(position, 0) |
| withString:substring]; |
| [string setAttributes:attrs range:NSMakeRange(position, num_characters)]; |
| position += num_characters; |
| } |
| return string; |
| } |
| |
| gfx::Point GetBaselinePoint(LocalFrameView* frame_view, |
| const EphemeralRange& range, |
| NSAttributedString* string) { |
| gfx::Rect string_rect = frame_view->FrameToViewport(FirstRectForRange(range)); |
| gfx::Point string_point = string_rect.bottom_left(); |
| |
| // Adjust for the font's descender. AppKit wants the baseline point. |
| if (string.length) { |
| NSDictionary* attributes = [string attributesAtIndex:0 |
| effectiveRange:nullptr]; |
| if (NSNumber* descender = attributes[kCrBaselineOffset]) { |
| string_point.Offset(0, -ceil(descender.doubleValue)); |
| } |
| } |
| return string_point; |
| } |
| |
| } // namespace |
| |
| base::apple::ScopedCFTypeRef<CFAttributedStringRef> |
| SubstringUtil::AttributedWordAtPoint(WebFrameWidgetImpl* frame_widget, |
| gfx::Point point, |
| gfx::Point& baseline_point) { |
| HitTestResult result = frame_widget->CoreHitTestResultAt(gfx::PointF(point)); |
| |
| if (!result.InnerNode()) { |
| return base::apple::ScopedCFTypeRef<CFAttributedStringRef>(); |
| } |
| LocalFrame* frame = result.InnerNode()->GetDocument().GetFrame(); |
| EphemeralRange range = |
| frame->GetEditor().RangeForPoint(result.RoundedPointInInnerNodeFrame()); |
| if (range.IsNull()) { |
| return base::apple::ScopedCFTypeRef<CFAttributedStringRef>(); |
| } |
| |
| // Expand to word under point. |
| const SelectionInDOMTree selection = ExpandWithGranularity( |
| SelectionInDOMTree::Builder().SetBaseAndExtent(range).Build(), |
| TextGranularity::kWord); |
| const EphemeralRange word_range = NormalizeRange(selection); |
| |
| // Convert to CFAttributedStringRef. |
| NSAttributedString* string = AttributedSubstringFromRange(frame, word_range); |
| baseline_point = GetBaselinePoint(frame->View(), word_range, string); |
| return base::apple::ScopedCFTypeRef<CFAttributedStringRef>( |
| base::apple::NSToCFOwnershipCast(string)); |
| } |
| |
| base::apple::ScopedCFTypeRef<CFAttributedStringRef> |
| SubstringUtil::AttributedSubstringInRange(LocalFrame* frame, |
| wtf_size_t location, |
| wtf_size_t length, |
| gfx::Point& baseline_point) { |
| frame->View()->UpdateStyleAndLayout(); |
| |
| Element* editable = frame->Selection().RootEditableElementOrDocumentElement(); |
| if (!editable) { |
| return base::apple::ScopedCFTypeRef<CFAttributedStringRef>(); |
| } |
| const EphemeralRange ephemeral_range( |
| PlainTextRange(location, location + length).CreateRange(*editable)); |
| if (ephemeral_range.IsNull()) { |
| return base::apple::ScopedCFTypeRef<CFAttributedStringRef>(); |
| } |
| |
| NSAttributedString* string = |
| AttributedSubstringFromRange(frame, ephemeral_range); |
| baseline_point = GetBaselinePoint(frame->View(), ephemeral_range, string); |
| return base::apple::ScopedCFTypeRef<CFAttributedStringRef>( |
| base::apple::NSToCFOwnershipCast(string)); |
| } |
| |
| } // namespace blink |
