mirror of
https://github.com/HeyPuter/firefox.git
synced 2026-11-13 20:14:57 -10:00
Andrew McCreight
4124fd8029
Nobody ever checks the failure value, so return the Span directly. This drops the setting of mNumRows and mNumCols in MouseDrag(), because we already require that the number of rows or columns does not change. This is checked via an assertion in GenerateRowCol(). Differential Revision: https://phabricator.services.mozilla.com/D267673
306 lines
11 KiB
C++
306 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "HTMLFrameSetElement.h"
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#include "mozilla/Try.h"
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#include "mozilla/UniquePtrExtensions.h"
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#include "mozilla/dom/Document.h"
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#include "mozilla/dom/EventHandlerBinding.h"
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#include "mozilla/dom/HTMLFrameSetElementBinding.h"
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#include "nsGlobalWindowInner.h"
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NS_IMPL_NS_NEW_HTML_ELEMENT(FrameSet)
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namespace mozilla::dom {
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HTMLFrameSetElement::~HTMLFrameSetElement() = default;
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JSObject* HTMLFrameSetElement::WrapNode(JSContext* aCx,
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JS::Handle<JSObject*> aGivenProto) {
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return HTMLFrameSetElement_Binding::Wrap(aCx, this, aGivenProto);
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}
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NS_IMPL_ELEMENT_CLONE(HTMLFrameSetElement)
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void HTMLFrameSetElement::BeforeSetAttr(int32_t aNamespaceID, nsAtom* aName,
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const nsAttrValue* aValue,
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bool aNotify) {
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/* The main goal here is to see whether the _number_ of rows or
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* columns has changed. If it has, we need to reframe; otherwise
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* we want to reflow.
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* Ideally, the style hint would be changed back to reflow after the reframe
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* has been performed. Unfortunately, however, the reframe will be performed
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* by the call to MutationObservers::AttributeChanged, which occurs *after*
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* AfterSetAttr is called, leaving us with no convenient way of changing the
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* value back to reflow afterwards. However,
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* MutationObservers::AttributeChanged is effectively the only consumer of
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* this value, so as long as we always set the value correctly here, we should
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* be fine.
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*/
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mCurrentRowColHint = NS_STYLE_HINT_REFLOW;
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if (aNamespaceID == kNameSpaceID_None) {
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if (aName == nsGkAtoms::rows) {
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if (aValue) {
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int32_t oldRows = mNumRows;
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ParseRowCol(*aValue, mNumRows, &mRowSpecs);
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if (mNumRows != oldRows) {
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mCurrentRowColHint = nsChangeHint_ReconstructFrame;
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}
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}
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} else if (aName == nsGkAtoms::cols) {
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if (aValue) {
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int32_t oldCols = mNumCols;
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ParseRowCol(*aValue, mNumCols, &mColSpecs);
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if (mNumCols != oldCols) {
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mCurrentRowColHint = nsChangeHint_ReconstructFrame;
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}
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}
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}
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}
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return nsGenericHTMLElement::BeforeSetAttr(aNamespaceID, aName, aValue,
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aNotify);
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}
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Span<const nsFramesetSpec> HTMLFrameSetElement::GetRowSpec() {
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if (!mRowSpecs) {
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if (const nsAttrValue* value = GetParsedAttr(nsGkAtoms::rows)) {
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if (NS_FAILED(ParseRowCol(*value, mNumRows, &mRowSpecs))) {
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return {};
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}
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}
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if (!mRowSpecs) { // we may not have had an attr or had an empty attr
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mRowSpecs = MakeUnique<nsFramesetSpec[]>(1);
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mNumRows = 1;
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mRowSpecs[0].mUnit = eFramesetUnit_Relative;
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mRowSpecs[0].mValue = 1;
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}
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}
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return Span(mRowSpecs.get(), mNumRows);
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}
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Span<const nsFramesetSpec> HTMLFrameSetElement::GetColSpec() {
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if (!mColSpecs) {
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if (const nsAttrValue* value = GetParsedAttr(nsGkAtoms::cols)) {
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if (NS_FAILED(ParseRowCol(*value, mNumCols, &mColSpecs))) {
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return {};
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}
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}
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if (!mColSpecs) { // we may not have had an attr or had an empty attr
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mColSpecs = MakeUnique<nsFramesetSpec[]>(1);
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mNumCols = 1;
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mColSpecs[0].mUnit = eFramesetUnit_Relative;
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mColSpecs[0].mValue = 1;
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}
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}
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return Span(mColSpecs.get(), mNumCols);
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}
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bool HTMLFrameSetElement::ParseAttribute(int32_t aNamespaceID,
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nsAtom* aAttribute,
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const nsAString& aValue,
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nsIPrincipal* aMaybeScriptedPrincipal,
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nsAttrValue& aResult) {
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if (aNamespaceID == kNameSpaceID_None) {
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if (aAttribute == nsGkAtoms::bordercolor) {
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return aResult.ParseColor(aValue);
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}
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if (aAttribute == nsGkAtoms::frameborder) {
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return nsGenericHTMLElement::ParseFrameborderValue(aValue, aResult);
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}
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if (aAttribute == nsGkAtoms::border) {
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return aResult.ParseIntWithBounds(aValue, 0, 100);
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}
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}
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return nsGenericHTMLElement::ParseAttribute(aNamespaceID, aAttribute, aValue,
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aMaybeScriptedPrincipal, aResult);
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}
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nsChangeHint HTMLFrameSetElement::GetAttributeChangeHint(
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const nsAtom* aAttribute, AttrModType aModType) const {
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nsChangeHint retval =
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nsGenericHTMLElement::GetAttributeChangeHint(aAttribute, aModType);
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if (aAttribute == nsGkAtoms::rows || aAttribute == nsGkAtoms::cols) {
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retval |= mCurrentRowColHint;
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}
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return retval;
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}
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/**
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* Translate a "rows" or "cols" spec into an array of nsFramesetSpecs
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*/
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nsresult HTMLFrameSetElement::ParseRowCol(const nsAttrValue& aValue,
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int32_t& aNumSpecs,
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UniquePtr<nsFramesetSpec[]>* aSpecs) {
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if (aValue.IsEmptyString()) {
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aNumSpecs = 0;
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*aSpecs = nullptr;
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return NS_OK;
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}
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MOZ_ASSERT(aValue.Type() == nsAttrValue::eString);
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static const char16_t sAster('*');
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static const char16_t sPercent('%');
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static const char16_t sComma(',');
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nsAutoString spec(aValue.GetStringValue());
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// remove whitespace (Bug 33699) and quotation marks (bug 224598)
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// also remove leading/trailing commas (bug 31482)
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spec.StripChars(u" \n\r\t\"\'");
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spec.Trim(",");
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// Count the commas. Don't count more than X commas (bug 576447).
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static_assert(NS_MAX_FRAMESET_SPEC_COUNT * sizeof(nsFramesetSpec) < (1 << 30),
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"Too many frameset specs allowed to allocate");
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int32_t commaX = spec.FindChar(sComma);
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int32_t count = 1;
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while (commaX != kNotFound && count < NS_MAX_FRAMESET_SPEC_COUNT) {
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count++;
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commaX = spec.FindChar(sComma, commaX + 1);
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}
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auto specs = MakeUniqueFallible<nsFramesetSpec[]>(count);
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if (!specs) {
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*aSpecs = nullptr;
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aNumSpecs = 0;
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return NS_ERROR_OUT_OF_MEMORY;
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}
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// Pre-grab the compat mode; we may need it later in the loop.
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bool isInQuirks = InNavQuirksMode(OwnerDoc());
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// Parse each comma separated token
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int32_t start = 0;
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int32_t specLen = spec.Length();
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for (int32_t i = 0; i < count; i++) {
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// Find our comma
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commaX = spec.FindChar(sComma, start);
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NS_ASSERTION(i == count - 1 || commaX != kNotFound,
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"Failed to find comma, somehow");
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int32_t end = (commaX == kNotFound) ? specLen : commaX;
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// Note: If end == start then it means that the token has no
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// data in it other than a terminating comma (or the end of the spec).
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// So default to a fixed width of 0.
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specs[i].mUnit = eFramesetUnit_Fixed;
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specs[i].mValue = 0;
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if (end > start) {
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int32_t numberEnd = end;
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char16_t ch = spec.CharAt(numberEnd - 1);
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if (sAster == ch) {
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specs[i].mUnit = eFramesetUnit_Relative;
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numberEnd--;
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} else if (sPercent == ch) {
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specs[i].mUnit = eFramesetUnit_Percent;
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numberEnd--;
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// check for "*%"
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if (numberEnd > start) {
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ch = spec.CharAt(numberEnd - 1);
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if (sAster == ch) {
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specs[i].mUnit = eFramesetUnit_Relative;
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numberEnd--;
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}
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}
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}
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// Translate value to an integer
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nsAutoString token;
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spec.Mid(token, start, numberEnd - start);
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// Treat * as 1*
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if ((eFramesetUnit_Relative == specs[i].mUnit) && (0 == token.Length())) {
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specs[i].mValue = 1;
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} else {
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// Otherwise just convert to integer.
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nsresult err;
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specs[i].mValue = token.ToInteger(&err);
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if (NS_FAILED(err)) {
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specs[i].mValue = 0;
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}
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}
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// Treat 0* as 1* in quirks mode (bug 40383)
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if (isInQuirks) {
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if ((eFramesetUnit_Relative == specs[i].mUnit) &&
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(0 == specs[i].mValue)) {
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specs[i].mValue = 1;
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}
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}
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// Catch zero and negative frame sizes for Nav compatibility
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// Nav resized absolute and relative frames to "1" and
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// percent frames to an even percentage of the width
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//
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// if (isInQuirks && (specs[i].mValue <= 0)) {
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// if (eFramesetUnit_Percent == specs[i].mUnit) {
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// specs[i].mValue = 100 / count;
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// } else {
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// specs[i].mValue = 1;
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// }
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//} else {
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// In standards mode, just set negative sizes to zero
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if (specs[i].mValue < 0) {
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specs[i].mValue = 0;
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}
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start = end + 1;
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}
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}
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aNumSpecs = count;
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// Transfer ownership to caller here
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*aSpecs = std::move(specs);
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return NS_OK;
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}
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bool HTMLFrameSetElement::IsEventAttributeNameInternal(nsAtom* aName) {
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return nsContentUtils::IsEventAttributeName(
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aName, EventNameType_HTML | EventNameType_HTMLBodyOrFramesetOnly);
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}
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#define EVENT(name_, id_, type_, struct_) /* nothing; handled by the shim */
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// nsGenericHTMLElement::GetOnError returns
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// already_AddRefed<EventHandlerNonNull> while other getters return
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// EventHandlerNonNull*, so allow passing in the type to use here.
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#define WINDOW_EVENT_HELPER(name_, type_) \
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type_* HTMLFrameSetElement::GetOn##name_() { \
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if (nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow()) { \
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nsGlobalWindowInner* globalWin = nsGlobalWindowInner::Cast(win); \
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return globalWin->GetOn##name_(); \
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} \
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return nullptr; \
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} \
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void HTMLFrameSetElement::SetOn##name_(type_* handler) { \
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nsPIDOMWindowInner* win = OwnerDoc()->GetInnerWindow(); \
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if (!win) { \
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return; \
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} \
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\
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nsGlobalWindowInner* globalWin = nsGlobalWindowInner::Cast(win); \
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return globalWin->SetOn##name_(handler); \
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}
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#define WINDOW_EVENT(name_, id_, type_, struct_) \
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WINDOW_EVENT_HELPER(name_, EventHandlerNonNull)
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#define BEFOREUNLOAD_EVENT(name_, id_, type_, struct_) \
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WINDOW_EVENT_HELPER(name_, OnBeforeUnloadEventHandlerNonNull)
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#include "mozilla/EventNameList.h" // IWYU pragma: keep
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#undef BEFOREUNLOAD_EVENT
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#undef WINDOW_EVENT
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#undef WINDOW_EVENT_HELPER
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#undef EVENT
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} // namespace mozilla::dom
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