More CTTE and other cleanups for HTML editing header

More CTTE and other cleanups for HTML editing header
https://bugs.webkit.org/show_bug.cgi?id=157722

Reviewed by Chris Dumez.

Source/WebCore:

These changes are mostly things Chris asked for in his review of my last patch
or other related style and small efficiency improvements.

- using nullptr instead of 0
- using is<Text> instead of isTextNode and is<> instead of hasTagName
- changing argument type of functions like editingIgnoresContent to a reference
- using { } instead of constructor calls for classes like Position
- using words like position intead of abbreviations like pos
- using auto rather than explicit types
- rename functions that return true for HTMLElement to express that in the function names

* dom/Position.cpp:
(WebCore::nextRenderedEditable): nullptr
(WebCore::previousRenderedEditable): nullptr
(WebCore::Position::Position): is<>, reference
(WebCore::Position::moveToPosition): reference
(WebCore::Position::offsetForPositionAfterAnchor): Added a null assertion and
null check that replaces the one that used to be in lastOffsetForEditing.
(WebCore::Position::parentAnchoredEquivalent): { }, reference
(WebCore::Position::computeNodeBeforePosition): nullptr
(WebCore::Position::computeNodeAfterPosition): nullptr
(WebCore::Position::anchorTypeForLegacyEditingPosition): reference
(WebCore::Position::previous): reference
(WebCore::Position::next): reference
(WebCore::Position::parentEditingBoundary): nullptr
(WebCore::Position::previousCharacterPosition): { }, pos -> position
(WebCore::Position::nextCharacterPosition): { }, pos -> position
(WebCore::endsOfNodeAreVisuallyDistinctPositions): reference
(WebCore::Position::upstream): { }, pos -> position
(WebCore::Position::downstream): { }, pos -> position
(WebCore::Position::rootUserSelectAllForNode): nullptr
(WebCore::Position::isCandidate): auto, reference, is<>
(WebCore::Position::rendersInDifferentPosition): pos -> position, auto, is<>
(WebCore::Position::leadingWhitespacePosition): { }, is<>
(WebCore::Position::trailingWhitespacePosition): { }
(WebCore::Position::getInlineBoxAndOffset): reference
(WebCore::Position::equals): reference, is<>

* dom/PositionIterator.cpp:
(WebCore::PositionIterator::operator Position): reference
(WebCore::PositionIterator::isCandidate): reference

* editing/ApplyStyleCommand.cpp:
(WebCore::ApplyStyleCommand::applyRelativeFontStyleChange): is<>
(WebCore::ApplyStyleCommand::applyInlineStyleToNodeRange): is<>, reference
(WebCore::ApplyStyleCommand::removeConflictingInlineStyleFromRun): reference
(WebCore::ApplyStyleCommand::removeInlineStyle): auto, is<>, reference
(WebCore::ApplyStyleCommand::nodeFullySelected): is<>
(WebCore::ApplyStyleCommand::nodeFullyUnselected): is<>
(WebCore::ApplyStyleCommand::splitTextAtStart): is<>
(WebCore::ApplyStyleCommand::splitTextElementAtStart): is<>
(WebCore::ApplyStyleCommand::splitTextElementAtEnd): is<>
(WebCore::ApplyStyleCommand::isValidCaretPositionInTextNode): is<>
(WebCore::ApplyStyleCommand::surroundNodeRangeWithElement): Removed unneeded
is<Element> calls before calling areIdenticalElements.
(WebCore::ApplyStyleCommand::positionToComputeInlineStyleChange): Tightened
up logic for the loop to avoid redundant checks.
(WebCore::ApplyStyleCommand::applyInlineStyleChange): auto

* editing/CompositeEditCommand.cpp:
(WebCore::CompositeEditCommand::insertNodeAt): reference
(WebCore::CompositeEditCommand::appendNode): reference
(WebCore::CompositeEditCommand::moveParagraphs): isListHTMLElement

* editing/DeleteSelectionCommand.cpp:
(WebCore::DeleteSelectionCommand::handleGeneralDelete): reference

* editing/FormatBlockCommand.cpp: Fixed order of includes.
(WebCore::enclosingBlockToSplitTreeTo): isListHTMLElement

* editing/InsertParagraphSeparatorCommand.cpp:
(WebCore::InsertParagraphSeparatorCommand::doApply): reference

* editing/ModifySelectionListLevel.cpp:
(WebCore::getStartEndListChildren): isListHTMLElement
(WebCore::IncreaseSelectionListLevelCommand::doApply):isListHTMLElement
(WebCore::canDecreaseListLevel):isListHTMLElement

* editing/RemoveNodeCommand.cpp: Removed unneeded include.

* editing/ReplaceNodeWithSpanCommand.cpp:
(WebCore::ReplaceNodeWithSpanCommand::doApply): Use HTMLSpanElement::create.

* editing/ReplaceSelectionCommand.cpp:
(WebCore::isInterchangeNewlineNode): is<>, downcast<>
(WebCore::isInterchangeConvertedSpaceSpan): is<>, downcast<>
(WebCore::positionAvoidingPrecedingNodes): pos -> position, reference
(WebCore::ReplaceSelectionCommand::doApply): isListHTMLElement
(WebCore::ReplaceSelectionCommand::insertAsListItems): isListHTMLElement

* editing/SpellChecker.cpp: Removed unneeded include.

* editing/TextIterator.cpp:
(WebCore::SimplifiedBackwardsTextIterator::advance): reference

* editing/VisibleSelection.cpp:
(WebCore::VisibleSelection::selectionFromContentsOfNode): reference

* editing/VisibleUnits.cpp:
(WebCore::previousLinePosition): reference
(WebCore::nextLinePosition): reference
(WebCore::findStartOfParagraph): reference
(WebCore::findEndOfParagraph): reference

* editing/htmlediting.cpp:
(WebCore::canHaveChildrenForEditing): Moved here from header file so we don't
have to include "Text.h". Not critical to inline this.
(WebCore::isAtomicNode): reference
(WebCore::lastOffsetForEditing): reference
(WebCore::stringWithRebalancedWhitespace): Changed to use StringBuilder instead
of Vector<UChar> so this won't turn 8-bit strings into 16-bit strings. Changed
to not use the StringBuilder at all until we encounter a character that needs
to be changed.
(WebCore::isSpecialHTMLElement): Renamed to make it clear that it only can return
true for a Node that is an HTMLElement.
(WebCore::firstInSpecialElement): isSpecialHTMLElement
(WebCore::lastInSpecialElement): isSpecialHTMLElement
(WebCore::isListHTMLElement): Renamed to make it clear that it can only return
true for a Node that is an HTMLElement.
(WebCore::isListItem): isListHTMLElement, is<>
(WebCore::enclosingNodeOfType): p -> position, nullptr
(WebCore::highestEnclosingNodeOfType): p -> position
(WebCore::enclosingListChild): isListHTMLElement, is<>
(WebCore::embeddedSublist): isListHTMLElement
(WebCore::appendedSublist):isListHTMLElement
(WebCore::caretMaxOffset): is<>
(WebCore::caretRendersInsideNode): changed to take a reference
(WebCore::rendererForCaretPainting): reference

* editing/htmlediting.h: Updated for name changes and type changes above.

* editing/markup.cpp:
(WebCore::StyledMarkupAccumulator::traverseNodesForSerialization): reference
(WebCore::highestAncestorToWrapMarkup): auto, reference, isListHTMLElement

* html/HTMLSpanElement.cpp:
(WebCore::HTMLSpanElement::create): Added overload that does not require a tag name.
* html/HTMLSpanElement.h: Ditto.

* page/DOMSelection.cpp: Removed unneeded includes.

* rendering/RenderBox.cpp:
(WebCore::RenderBox::localCaretRect): reference

Source/WebKit/ios:

* WebCoreSupport/WebFrameIOS.mm:
(-[WebFrame previousUnperturbedDictationResultBoundaryFromPosition:]): auto
(-[WebFrame nextUnperturbedDictationResultBoundaryFromPosition:]): auto

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@200931 268f45cc-cd09-0410-ab3c-d52691b4dbfc