1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/editor/libeditor/html/nsHTMLCSSUtils.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,1415 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "ChangeCSSInlineStyleTxn.h"
1.10 +#include "EditTxn.h"
1.11 +#include "mozilla/Assertions.h"
1.12 +#include "mozilla/Preferences.h"
1.13 +#include "mozilla/css/Declaration.h"
1.14 +#include "mozilla/css/StyleRule.h"
1.15 +#include "mozilla/dom/Element.h"
1.16 +#include "mozilla/mozalloc.h"
1.17 +#include "nsAString.h"
1.18 +#include "nsAutoPtr.h"
1.19 +#include "nsCOMPtr.h"
1.20 +#include "nsColor.h"
1.21 +#include "nsComputedDOMStyle.h"
1.22 +#include "nsDebug.h"
1.23 +#include "nsDependentSubstring.h"
1.24 +#include "nsEditProperty.h"
1.25 +#include "nsError.h"
1.26 +#include "nsGkAtoms.h"
1.27 +#include "nsHTMLCSSUtils.h"
1.28 +#include "nsHTMLEditor.h"
1.29 +#include "nsIAtom.h"
1.30 +#include "nsIContent.h"
1.31 +#include "nsIDOMCSSStyleDeclaration.h"
1.32 +#include "nsIDOMElement.h"
1.33 +#include "nsIDOMElementCSSInlineStyle.h"
1.34 +#include "nsIDOMNode.h"
1.35 +#include "nsIDOMWindow.h"
1.36 +#include "nsIDocument.h"
1.37 +#include "nsIEditor.h"
1.38 +#include "nsINode.h"
1.39 +#include "nsISupportsImpl.h"
1.40 +#include "nsISupportsUtils.h"
1.41 +#include "nsLiteralString.h"
1.42 +#include "nsPIDOMWindow.h"
1.43 +#include "nsReadableUtils.h"
1.44 +#include "nsString.h"
1.45 +#include "nsStringFwd.h"
1.46 +#include "nsStringIterator.h"
1.47 +#include "nsSubstringTuple.h"
1.48 +#include "nsUnicharUtils.h"
1.49 +
1.50 +using namespace mozilla;
1.51 +
1.52 +static
1.53 +void ProcessBValue(const nsAString * aInputString, nsAString & aOutputString,
1.54 + const char * aDefaultValueString,
1.55 + const char * aPrependString, const char* aAppendString)
1.56 +{
1.57 + if (aInputString && aInputString->EqualsLiteral("-moz-editor-invert-value")) {
1.58 + aOutputString.AssignLiteral("normal");
1.59 + }
1.60 + else {
1.61 + aOutputString.AssignLiteral("bold");
1.62 + }
1.63 +}
1.64 +
1.65 +static
1.66 +void ProcessDefaultValue(const nsAString * aInputString, nsAString & aOutputString,
1.67 + const char * aDefaultValueString,
1.68 + const char * aPrependString, const char* aAppendString)
1.69 +{
1.70 + CopyASCIItoUTF16(aDefaultValueString, aOutputString);
1.71 +}
1.72 +
1.73 +static
1.74 +void ProcessSameValue(const nsAString * aInputString, nsAString & aOutputString,
1.75 + const char * aDefaultValueString,
1.76 + const char * aPrependString, const char* aAppendString)
1.77 +{
1.78 + if (aInputString) {
1.79 + aOutputString.Assign(*aInputString);
1.80 + }
1.81 + else
1.82 + aOutputString.Truncate();
1.83 +}
1.84 +
1.85 +static
1.86 +void ProcessExtendedValue(const nsAString * aInputString, nsAString & aOutputString,
1.87 + const char * aDefaultValueString,
1.88 + const char * aPrependString, const char* aAppendString)
1.89 +{
1.90 + aOutputString.Truncate();
1.91 + if (aInputString) {
1.92 + if (aPrependString) {
1.93 + AppendASCIItoUTF16(aPrependString, aOutputString);
1.94 + }
1.95 + aOutputString.Append(*aInputString);
1.96 + if (aAppendString) {
1.97 + AppendASCIItoUTF16(aAppendString, aOutputString);
1.98 + }
1.99 + }
1.100 +}
1.101 +
1.102 +static
1.103 +void ProcessLengthValue(const nsAString * aInputString, nsAString & aOutputString,
1.104 + const char * aDefaultValueString,
1.105 + const char * aPrependString, const char* aAppendString)
1.106 +{
1.107 + aOutputString.Truncate();
1.108 + if (aInputString) {
1.109 + aOutputString.Append(*aInputString);
1.110 + if (-1 == aOutputString.FindChar(char16_t('%'))) {
1.111 + aOutputString.AppendLiteral("px");
1.112 + }
1.113 + }
1.114 +}
1.115 +
1.116 +static
1.117 +void ProcessListStyleTypeValue(const nsAString * aInputString, nsAString & aOutputString,
1.118 + const char * aDefaultValueString,
1.119 + const char * aPrependString, const char* aAppendString)
1.120 +{
1.121 + aOutputString.Truncate();
1.122 + if (aInputString) {
1.123 + if (aInputString->EqualsLiteral("1")) {
1.124 + aOutputString.AppendLiteral("decimal");
1.125 + }
1.126 + else if (aInputString->EqualsLiteral("a")) {
1.127 + aOutputString.AppendLiteral("lower-alpha");
1.128 + }
1.129 + else if (aInputString->EqualsLiteral("A")) {
1.130 + aOutputString.AppendLiteral("upper-alpha");
1.131 + }
1.132 + else if (aInputString->EqualsLiteral("i")) {
1.133 + aOutputString.AppendLiteral("lower-roman");
1.134 + }
1.135 + else if (aInputString->EqualsLiteral("I")) {
1.136 + aOutputString.AppendLiteral("upper-roman");
1.137 + }
1.138 + else if (aInputString->EqualsLiteral("square")
1.139 + || aInputString->EqualsLiteral("circle")
1.140 + || aInputString->EqualsLiteral("disc")) {
1.141 + aOutputString.Append(*aInputString);
1.142 + }
1.143 + }
1.144 +}
1.145 +
1.146 +static
1.147 +void ProcessMarginLeftValue(const nsAString * aInputString, nsAString & aOutputString,
1.148 + const char * aDefaultValueString,
1.149 + const char * aPrependString, const char* aAppendString)
1.150 +{
1.151 + aOutputString.Truncate();
1.152 + if (aInputString) {
1.153 + if (aInputString->EqualsLiteral("center") ||
1.154 + aInputString->EqualsLiteral("-moz-center")) {
1.155 + aOutputString.AppendLiteral("auto");
1.156 + }
1.157 + else if (aInputString->EqualsLiteral("right") ||
1.158 + aInputString->EqualsLiteral("-moz-right")) {
1.159 + aOutputString.AppendLiteral("auto");
1.160 + }
1.161 + else {
1.162 + aOutputString.AppendLiteral("0px");
1.163 + }
1.164 + }
1.165 +}
1.166 +
1.167 +static
1.168 +void ProcessMarginRightValue(const nsAString * aInputString, nsAString & aOutputString,
1.169 + const char * aDefaultValueString,
1.170 + const char * aPrependString, const char* aAppendString)
1.171 +{
1.172 + aOutputString.Truncate();
1.173 + if (aInputString) {
1.174 + if (aInputString->EqualsLiteral("center") ||
1.175 + aInputString->EqualsLiteral("-moz-center")) {
1.176 + aOutputString.AppendLiteral("auto");
1.177 + }
1.178 + else if (aInputString->EqualsLiteral("left") ||
1.179 + aInputString->EqualsLiteral("-moz-left")) {
1.180 + aOutputString.AppendLiteral("auto");
1.181 + }
1.182 + else {
1.183 + aOutputString.AppendLiteral("0px");
1.184 + }
1.185 + }
1.186 +}
1.187 +
1.188 +const nsHTMLCSSUtils::CSSEquivTable boldEquivTable[] = {
1.189 + { nsHTMLCSSUtils::eCSSEditableProperty_font_weight, ProcessBValue, nullptr, nullptr, nullptr, true, false },
1.190 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.191 +};
1.192 +
1.193 +const nsHTMLCSSUtils::CSSEquivTable italicEquivTable[] = {
1.194 + { nsHTMLCSSUtils::eCSSEditableProperty_font_style, ProcessDefaultValue, "italic", nullptr, nullptr, true, false },
1.195 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.196 +};
1.197 +
1.198 +const nsHTMLCSSUtils::CSSEquivTable underlineEquivTable[] = {
1.199 + { nsHTMLCSSUtils::eCSSEditableProperty_text_decoration, ProcessDefaultValue, "underline", nullptr, nullptr, true, false },
1.200 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.201 +};
1.202 +
1.203 +const nsHTMLCSSUtils::CSSEquivTable strikeEquivTable[] = {
1.204 + { nsHTMLCSSUtils::eCSSEditableProperty_text_decoration, ProcessDefaultValue, "line-through", nullptr, nullptr, true, false },
1.205 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.206 +};
1.207 +
1.208 +const nsHTMLCSSUtils::CSSEquivTable ttEquivTable[] = {
1.209 + { nsHTMLCSSUtils::eCSSEditableProperty_font_family, ProcessDefaultValue, "monospace", nullptr, nullptr, true, false },
1.210 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.211 +};
1.212 +
1.213 +const nsHTMLCSSUtils::CSSEquivTable fontColorEquivTable[] = {
1.214 + { nsHTMLCSSUtils::eCSSEditableProperty_color, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
1.215 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.216 +};
1.217 +
1.218 +const nsHTMLCSSUtils::CSSEquivTable fontFaceEquivTable[] = {
1.219 + { nsHTMLCSSUtils::eCSSEditableProperty_font_family, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
1.220 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.221 +};
1.222 +
1.223 +const nsHTMLCSSUtils::CSSEquivTable bgcolorEquivTable[] = {
1.224 + { nsHTMLCSSUtils::eCSSEditableProperty_background_color, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
1.225 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.226 +};
1.227 +
1.228 +const nsHTMLCSSUtils::CSSEquivTable backgroundImageEquivTable[] = {
1.229 + { nsHTMLCSSUtils::eCSSEditableProperty_background_image, ProcessExtendedValue, nullptr, "url(", ")", true, true },
1.230 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.231 +};
1.232 +
1.233 +const nsHTMLCSSUtils::CSSEquivTable textColorEquivTable[] = {
1.234 + { nsHTMLCSSUtils::eCSSEditableProperty_color, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
1.235 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.236 +};
1.237 +
1.238 +const nsHTMLCSSUtils::CSSEquivTable borderEquivTable[] = {
1.239 + { nsHTMLCSSUtils::eCSSEditableProperty_border, ProcessExtendedValue, nullptr, nullptr, "px solid", true, false },
1.240 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.241 +};
1.242 +
1.243 +const nsHTMLCSSUtils::CSSEquivTable textAlignEquivTable[] = {
1.244 + { nsHTMLCSSUtils::eCSSEditableProperty_text_align, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
1.245 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.246 +};
1.247 +
1.248 +const nsHTMLCSSUtils::CSSEquivTable captionAlignEquivTable[] = {
1.249 + { nsHTMLCSSUtils::eCSSEditableProperty_caption_side, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
1.250 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.251 +};
1.252 +
1.253 +const nsHTMLCSSUtils::CSSEquivTable verticalAlignEquivTable[] = {
1.254 + { nsHTMLCSSUtils::eCSSEditableProperty_vertical_align, ProcessSameValue, nullptr, nullptr, nullptr, true, false },
1.255 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.256 +};
1.257 +
1.258 +const nsHTMLCSSUtils::CSSEquivTable nowrapEquivTable[] = {
1.259 + { nsHTMLCSSUtils::eCSSEditableProperty_whitespace, ProcessDefaultValue, "nowrap", nullptr, nullptr, true, false },
1.260 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.261 +};
1.262 +
1.263 +const nsHTMLCSSUtils::CSSEquivTable widthEquivTable[] = {
1.264 + { nsHTMLCSSUtils::eCSSEditableProperty_width, ProcessLengthValue, nullptr, nullptr, nullptr, true, false },
1.265 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.266 +};
1.267 +
1.268 +const nsHTMLCSSUtils::CSSEquivTable heightEquivTable[] = {
1.269 + { nsHTMLCSSUtils::eCSSEditableProperty_height, ProcessLengthValue, nullptr, nullptr, nullptr, true, false },
1.270 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.271 +};
1.272 +
1.273 +const nsHTMLCSSUtils::CSSEquivTable listStyleTypeEquivTable[] = {
1.274 + { nsHTMLCSSUtils::eCSSEditableProperty_list_style_type, ProcessListStyleTypeValue, nullptr, nullptr, nullptr, true, true },
1.275 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.276 +};
1.277 +
1.278 +const nsHTMLCSSUtils::CSSEquivTable tableAlignEquivTable[] = {
1.279 + { nsHTMLCSSUtils::eCSSEditableProperty_text_align, ProcessDefaultValue, "left", nullptr, nullptr, false, false },
1.280 + { nsHTMLCSSUtils::eCSSEditableProperty_margin_left, ProcessMarginLeftValue, nullptr, nullptr, nullptr, true, false },
1.281 + { nsHTMLCSSUtils::eCSSEditableProperty_margin_right, ProcessMarginRightValue, nullptr, nullptr, nullptr, true, false },
1.282 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.283 +};
1.284 +
1.285 +const nsHTMLCSSUtils::CSSEquivTable hrAlignEquivTable[] = {
1.286 + { nsHTMLCSSUtils::eCSSEditableProperty_margin_left, ProcessMarginLeftValue, nullptr, nullptr, nullptr, true, false },
1.287 + { nsHTMLCSSUtils::eCSSEditableProperty_margin_right, ProcessMarginRightValue, nullptr, nullptr, nullptr, true, false },
1.288 + { nsHTMLCSSUtils::eCSSEditableProperty_NONE, 0 }
1.289 +};
1.290 +
1.291 +nsHTMLCSSUtils::nsHTMLCSSUtils(nsHTMLEditor* aEditor)
1.292 + : mHTMLEditor(aEditor)
1.293 + , mIsCSSPrefChecked(true)
1.294 +{
1.295 + // let's retrieve the value of the "CSS editing" pref
1.296 + mIsCSSPrefChecked = Preferences::GetBool("editor.use_css", mIsCSSPrefChecked);
1.297 +}
1.298 +
1.299 +nsHTMLCSSUtils::~nsHTMLCSSUtils()
1.300 +{
1.301 +}
1.302 +
1.303 +// Answers true if we have some CSS equivalence for the HTML style defined
1.304 +// by aProperty and/or aAttribute for the node aNode
1.305 +bool
1.306 +nsHTMLCSSUtils::IsCSSEditableProperty(nsIDOMNode* aNode,
1.307 + nsIAtom* aProperty,
1.308 + const nsAString* aAttribute)
1.309 +{
1.310 + NS_ASSERTION(aNode, "Shouldn't you pass aNode? - Bug 214025");
1.311 +
1.312 + nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
1.313 + NS_ENSURE_TRUE(content, false);
1.314 + return IsCSSEditableProperty(content, aProperty, aAttribute);
1.315 +}
1.316 +
1.317 +bool
1.318 +nsHTMLCSSUtils::IsCSSEditableProperty(nsIContent* aNode,
1.319 + nsIAtom* aProperty,
1.320 + const nsAString* aAttribute)
1.321 +{
1.322 + MOZ_ASSERT(aNode);
1.323 +
1.324 + nsIContent* content = aNode;
1.325 + // we need an element node here
1.326 + if (content->NodeType() == nsIDOMNode::TEXT_NODE) {
1.327 + content = content->GetParent();
1.328 + NS_ENSURE_TRUE(content, false);
1.329 + }
1.330 +
1.331 + nsIAtom *tagName = content->Tag();
1.332 + // brade: shouldn't some of the above go below the next block?
1.333 +
1.334 + // html inline styles B I TT U STRIKE and COLOR/FACE on FONT
1.335 + if (nsEditProperty::b == aProperty
1.336 + || nsEditProperty::i == aProperty
1.337 + || nsEditProperty::tt == aProperty
1.338 + || nsEditProperty::u == aProperty
1.339 + || nsEditProperty::strike == aProperty
1.340 + || ((nsEditProperty::font == aProperty) && aAttribute &&
1.341 + (aAttribute->EqualsLiteral("color") ||
1.342 + aAttribute->EqualsLiteral("face")))) {
1.343 + return true;
1.344 + }
1.345 +
1.346 + // ALIGN attribute on elements supporting it
1.347 + if (aAttribute && (aAttribute->EqualsLiteral("align")) &&
1.348 + (nsEditProperty::div == tagName
1.349 + || nsEditProperty::p == tagName
1.350 + || nsEditProperty::h1 == tagName
1.351 + || nsEditProperty::h2 == tagName
1.352 + || nsEditProperty::h3 == tagName
1.353 + || nsEditProperty::h4 == tagName
1.354 + || nsEditProperty::h5 == tagName
1.355 + || nsEditProperty::h6 == tagName
1.356 + || nsEditProperty::td == tagName
1.357 + || nsEditProperty::th == tagName
1.358 + || nsEditProperty::table == tagName
1.359 + || nsEditProperty::hr == tagName
1.360 + // brade: for the above, why not use nsHTMLEditUtils::SupportsAlignAttr
1.361 + // brade: but it also checks for tbody, tfoot, thead
1.362 + // Let's add the following elements here even if ALIGN has not
1.363 + // the same meaning for them
1.364 + || nsEditProperty::legend == tagName
1.365 + || nsEditProperty::caption == tagName)) {
1.366 + return true;
1.367 + }
1.368 +
1.369 + if (aAttribute && (aAttribute->EqualsLiteral("valign")) &&
1.370 + (nsEditProperty::col == tagName
1.371 + || nsEditProperty::colgroup == tagName
1.372 + || nsEditProperty::tbody == tagName
1.373 + || nsEditProperty::td == tagName
1.374 + || nsEditProperty::th == tagName
1.375 + || nsEditProperty::tfoot == tagName
1.376 + || nsEditProperty::thead == tagName
1.377 + || nsEditProperty::tr == tagName)) {
1.378 + return true;
1.379 + }
1.380 +
1.381 + // attributes TEXT, BACKGROUND and BGCOLOR on BODY
1.382 + if (aAttribute && (nsEditProperty::body == tagName) &&
1.383 + (aAttribute->EqualsLiteral("text")
1.384 + || aAttribute->EqualsLiteral("background")
1.385 + || aAttribute->EqualsLiteral("bgcolor"))) {
1.386 + return true;
1.387 + }
1.388 +
1.389 + // attribute BGCOLOR on other elements
1.390 + if (aAttribute && aAttribute->EqualsLiteral("bgcolor")) {
1.391 + return true;
1.392 + }
1.393 +
1.394 + // attributes HEIGHT, WIDTH and NOWRAP on TD and TH
1.395 + if (aAttribute && ((nsEditProperty::td == tagName)
1.396 + || (nsEditProperty::th == tagName)) &&
1.397 + (aAttribute->EqualsLiteral("height")
1.398 + || aAttribute->EqualsLiteral("width")
1.399 + || aAttribute->EqualsLiteral("nowrap"))) {
1.400 + return true;
1.401 + }
1.402 +
1.403 + // attributes HEIGHT and WIDTH on TABLE
1.404 + if (aAttribute && (nsEditProperty::table == tagName) &&
1.405 + (aAttribute->EqualsLiteral("height")
1.406 + || aAttribute->EqualsLiteral("width"))) {
1.407 + return true;
1.408 + }
1.409 +
1.410 + // attributes SIZE and WIDTH on HR
1.411 + if (aAttribute && (nsEditProperty::hr == tagName) &&
1.412 + (aAttribute->EqualsLiteral("size")
1.413 + || aAttribute->EqualsLiteral("width"))) {
1.414 + return true;
1.415 + }
1.416 +
1.417 + // attribute TYPE on OL UL LI
1.418 + if (aAttribute && (nsEditProperty::ol == tagName
1.419 + || nsEditProperty::ul == tagName
1.420 + || nsEditProperty::li == tagName) &&
1.421 + aAttribute->EqualsLiteral("type")) {
1.422 + return true;
1.423 + }
1.424 +
1.425 + if (aAttribute && nsEditProperty::img == tagName &&
1.426 + (aAttribute->EqualsLiteral("border")
1.427 + || aAttribute->EqualsLiteral("width")
1.428 + || aAttribute->EqualsLiteral("height"))) {
1.429 + return true;
1.430 + }
1.431 +
1.432 + // other elements that we can align using CSS even if they
1.433 + // can't carry the html ALIGN attribute
1.434 + if (aAttribute && aAttribute->EqualsLiteral("align") &&
1.435 + (nsEditProperty::ul == tagName
1.436 + || nsEditProperty::ol == tagName
1.437 + || nsEditProperty::dl == tagName
1.438 + || nsEditProperty::li == tagName
1.439 + || nsEditProperty::dd == tagName
1.440 + || nsEditProperty::dt == tagName
1.441 + || nsEditProperty::address == tagName
1.442 + || nsEditProperty::pre == tagName
1.443 + || nsEditProperty::ul == tagName)) {
1.444 + return true;
1.445 + }
1.446 +
1.447 + return false;
1.448 +}
1.449 +
1.450 +// the lowest level above the transaction; adds the css declaration "aProperty : aValue" to
1.451 +// the inline styles carried by aElement
1.452 +nsresult
1.453 +nsHTMLCSSUtils::SetCSSProperty(nsIDOMElement *aElement, nsIAtom * aProperty, const nsAString & aValue,
1.454 + bool aSuppressTransaction)
1.455 +{
1.456 + nsRefPtr<ChangeCSSInlineStyleTxn> txn;
1.457 + nsresult result = CreateCSSPropertyTxn(aElement, aProperty, aValue,
1.458 + getter_AddRefs(txn), false);
1.459 + if (NS_SUCCEEDED(result)) {
1.460 + if (aSuppressTransaction) {
1.461 + result = txn->DoTransaction();
1.462 + }
1.463 + else {
1.464 + result = mHTMLEditor->DoTransaction(txn);
1.465 + }
1.466 + }
1.467 + return result;
1.468 +}
1.469 +
1.470 +nsresult
1.471 +nsHTMLCSSUtils::SetCSSPropertyPixels(nsIDOMElement *aElement,
1.472 + nsIAtom *aProperty,
1.473 + int32_t aIntValue,
1.474 + bool aSuppressTransaction)
1.475 +{
1.476 + nsAutoString s;
1.477 + s.AppendInt(aIntValue);
1.478 + return SetCSSProperty(aElement, aProperty, s + NS_LITERAL_STRING("px"),
1.479 + aSuppressTransaction);
1.480 +}
1.481 +
1.482 +// the lowest level above the transaction; removes the value aValue from the list of values
1.483 +// specified for the CSS property aProperty, or totally remove the declaration if this
1.484 +// property accepts only one value
1.485 +nsresult
1.486 +nsHTMLCSSUtils::RemoveCSSProperty(nsIDOMElement *aElement, nsIAtom * aProperty, const nsAString & aValue,
1.487 + bool aSuppressTransaction)
1.488 +{
1.489 + nsRefPtr<ChangeCSSInlineStyleTxn> txn;
1.490 + nsresult result = CreateCSSPropertyTxn(aElement, aProperty, aValue,
1.491 + getter_AddRefs(txn), true);
1.492 + if (NS_SUCCEEDED(result)) {
1.493 + if (aSuppressTransaction) {
1.494 + result = txn->DoTransaction();
1.495 + }
1.496 + else {
1.497 + result = mHTMLEditor->DoTransaction(txn);
1.498 + }
1.499 + }
1.500 + return result;
1.501 +}
1.502 +
1.503 +nsresult
1.504 +nsHTMLCSSUtils::CreateCSSPropertyTxn(nsIDOMElement *aElement,
1.505 + nsIAtom * aAttribute,
1.506 + const nsAString& aValue,
1.507 + ChangeCSSInlineStyleTxn ** aTxn,
1.508 + bool aRemoveProperty)
1.509 +{
1.510 + NS_ENSURE_TRUE(aElement, NS_ERROR_NULL_POINTER);
1.511 +
1.512 + *aTxn = new ChangeCSSInlineStyleTxn();
1.513 + NS_ENSURE_TRUE(*aTxn, NS_ERROR_OUT_OF_MEMORY);
1.514 + NS_ADDREF(*aTxn);
1.515 + return (*aTxn)->Init(mHTMLEditor, aElement, aAttribute, aValue, aRemoveProperty);
1.516 +}
1.517 +
1.518 +nsresult
1.519 +nsHTMLCSSUtils::GetSpecifiedProperty(nsIDOMNode *aNode, nsIAtom *aProperty,
1.520 + nsAString & aValue)
1.521 +{
1.522 + return GetCSSInlinePropertyBase(aNode, aProperty, aValue, eSpecified);
1.523 +}
1.524 +
1.525 +nsresult
1.526 +nsHTMLCSSUtils::GetComputedProperty(nsIDOMNode *aNode, nsIAtom *aProperty,
1.527 + nsAString & aValue)
1.528 +{
1.529 + return GetCSSInlinePropertyBase(aNode, aProperty, aValue, eComputed);
1.530 +}
1.531 +
1.532 +nsresult
1.533 +nsHTMLCSSUtils::GetCSSInlinePropertyBase(nsIDOMNode* aNode, nsIAtom* aProperty,
1.534 + nsAString& aValue,
1.535 + StyleType aStyleType)
1.536 +{
1.537 + nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
1.538 + return GetCSSInlinePropertyBase(node, aProperty, aValue, aStyleType);
1.539 +}
1.540 +
1.541 +nsresult
1.542 +nsHTMLCSSUtils::GetCSSInlinePropertyBase(nsINode* aNode, nsIAtom* aProperty,
1.543 + nsAString& aValue,
1.544 + StyleType aStyleType)
1.545 +{
1.546 + MOZ_ASSERT(aNode && aProperty);
1.547 + aValue.Truncate();
1.548 +
1.549 + nsCOMPtr<dom::Element> element = GetElementContainerOrSelf(aNode);
1.550 + NS_ENSURE_TRUE(element, NS_ERROR_NULL_POINTER);
1.551 +
1.552 + if (aStyleType == eComputed) {
1.553 + // Get the all the computed css styles attached to the element node
1.554 + nsRefPtr<nsComputedDOMStyle> cssDecl = GetComputedStyle(element);
1.555 + NS_ENSURE_STATE(cssDecl);
1.556 +
1.557 + // from these declarations, get the one we want and that one only
1.558 + MOZ_ALWAYS_TRUE(NS_SUCCEEDED(
1.559 + cssDecl->GetPropertyValue(nsDependentAtomString(aProperty), aValue)));
1.560 +
1.561 + return NS_OK;
1.562 + }
1.563 +
1.564 + MOZ_ASSERT(aStyleType == eSpecified);
1.565 + nsRefPtr<css::StyleRule> rule = element->GetInlineStyleRule();
1.566 + if (!rule) {
1.567 + return NS_OK;
1.568 + }
1.569 + nsCSSProperty prop =
1.570 + nsCSSProps::LookupProperty(nsDependentAtomString(aProperty),
1.571 + nsCSSProps::eEnabledForAllContent);
1.572 + MOZ_ASSERT(prop != eCSSProperty_UNKNOWN);
1.573 + rule->GetDeclaration()->GetValue(prop, aValue);
1.574 +
1.575 + return NS_OK;
1.576 +}
1.577 +
1.578 +already_AddRefed<nsComputedDOMStyle>
1.579 +nsHTMLCSSUtils::GetComputedStyle(nsIDOMElement* aElement)
1.580 +{
1.581 + nsCOMPtr<dom::Element> element = do_QueryInterface(aElement);
1.582 + return GetComputedStyle(element);
1.583 +}
1.584 +
1.585 +already_AddRefed<nsComputedDOMStyle>
1.586 +nsHTMLCSSUtils::GetComputedStyle(dom::Element* aElement)
1.587 +{
1.588 + MOZ_ASSERT(aElement);
1.589 +
1.590 + nsIDocument* doc = aElement->GetCurrentDoc();
1.591 + NS_ENSURE_TRUE(doc, nullptr);
1.592 +
1.593 + nsIPresShell* presShell = doc->GetShell();
1.594 + NS_ENSURE_TRUE(presShell, nullptr);
1.595 +
1.596 + nsRefPtr<nsComputedDOMStyle> style =
1.597 + NS_NewComputedDOMStyle(aElement, EmptyString(), presShell);
1.598 +
1.599 + return style.forget();
1.600 +}
1.601 +
1.602 +// remove the CSS style "aProperty : aPropertyValue" and possibly remove the whole node
1.603 +// if it is a span and if its only attribute is _moz_dirty
1.604 +nsresult
1.605 +nsHTMLCSSUtils::RemoveCSSInlineStyle(nsIDOMNode *aNode, nsIAtom *aProperty, const nsAString & aPropertyValue)
1.606 +{
1.607 + nsCOMPtr<nsIDOMElement> elem = do_QueryInterface(aNode);
1.608 +
1.609 + // remove the property from the style attribute
1.610 + nsresult res = RemoveCSSProperty(elem, aProperty, aPropertyValue, false);
1.611 + NS_ENSURE_SUCCESS(res, res);
1.612 +
1.613 + nsCOMPtr<dom::Element> element = do_QueryInterface(aNode);
1.614 + if (!element || !element->IsHTML(nsGkAtoms::span) ||
1.615 + nsHTMLEditor::HasAttributes(element)) {
1.616 + return NS_OK;
1.617 + }
1.618 +
1.619 + return mHTMLEditor->RemoveContainer(aNode);
1.620 +}
1.621 +
1.622 +// Answers true is the property can be removed by setting a "none" CSS value
1.623 +// on a node
1.624 +bool
1.625 +nsHTMLCSSUtils::IsCSSInvertable(nsIAtom *aProperty, const nsAString *aAttribute)
1.626 +{
1.627 + return bool(nsEditProperty::b == aProperty);
1.628 +}
1.629 +
1.630 +// Get the default browser background color if we need it for GetCSSBackgroundColorState
1.631 +void
1.632 +nsHTMLCSSUtils::GetDefaultBackgroundColor(nsAString & aColor)
1.633 +{
1.634 + if (Preferences::GetBool("editor.use_custom_colors", false)) {
1.635 + nsresult rv = Preferences::GetString("editor.background_color", &aColor);
1.636 + // XXX Why don't you validate the pref value?
1.637 + if (NS_FAILED(rv)) {
1.638 + NS_WARNING("failed to get editor.background_color");
1.639 + aColor.AssignLiteral("#ffffff"); // Default to white
1.640 + }
1.641 + return;
1.642 + }
1.643 +
1.644 + if (Preferences::GetBool("browser.display.use_system_colors", false)) {
1.645 + return;
1.646 + }
1.647 +
1.648 + nsresult rv =
1.649 + Preferences::GetString("browser.display.background_color", &aColor);
1.650 + // XXX Why don't you validate the pref value?
1.651 + if (NS_FAILED(rv)) {
1.652 + NS_WARNING("failed to get browser.display.background_color");
1.653 + aColor.AssignLiteral("#ffffff"); // Default to white
1.654 + }
1.655 +}
1.656 +
1.657 +// Get the default length unit used for CSS Indent/Outdent
1.658 +void
1.659 +nsHTMLCSSUtils::GetDefaultLengthUnit(nsAString & aLengthUnit)
1.660 +{
1.661 + nsresult rv =
1.662 + Preferences::GetString("editor.css.default_length_unit", &aLengthUnit);
1.663 + // XXX Why don't you validate the pref value?
1.664 + if (NS_FAILED(rv)) {
1.665 + aLengthUnit.AssignLiteral("px");
1.666 + }
1.667 +}
1.668 +
1.669 +// Unfortunately, CSSStyleDeclaration::GetPropertyCSSValue is not yet implemented...
1.670 +// We need then a way to determine the number part and the unit from aString, aString
1.671 +// being the result of a GetPropertyValue query...
1.672 +void
1.673 +nsHTMLCSSUtils::ParseLength(const nsAString & aString, float * aValue, nsIAtom ** aUnit)
1.674 +{
1.675 + nsAString::const_iterator iter;
1.676 + aString.BeginReading(iter);
1.677 +
1.678 + float a = 10.0f , b = 1.0f, value = 0;
1.679 + int8_t sign = 1;
1.680 + int32_t i = 0, j = aString.Length();
1.681 + char16_t c;
1.682 + bool floatingPointFound = false;
1.683 + c = *iter;
1.684 + if (char16_t('-') == c) { sign = -1; iter++; i++; }
1.685 + else if (char16_t('+') == c) { iter++; i++; }
1.686 + while (i < j) {
1.687 + c = *iter;
1.688 + if ((char16_t('0') == c) ||
1.689 + (char16_t('1') == c) ||
1.690 + (char16_t('2') == c) ||
1.691 + (char16_t('3') == c) ||
1.692 + (char16_t('4') == c) ||
1.693 + (char16_t('5') == c) ||
1.694 + (char16_t('6') == c) ||
1.695 + (char16_t('7') == c) ||
1.696 + (char16_t('8') == c) ||
1.697 + (char16_t('9') == c)) {
1.698 + value = (value * a) + (b * (c - char16_t('0')));
1.699 + b = b / 10 * a;
1.700 + }
1.701 + else if (!floatingPointFound && (char16_t('.') == c)) {
1.702 + floatingPointFound = true;
1.703 + a = 1.0f; b = 0.1f;
1.704 + }
1.705 + else break;
1.706 + iter++;
1.707 + i++;
1.708 + }
1.709 + *aValue = value * sign;
1.710 + *aUnit = NS_NewAtom(StringTail(aString, j-i)).take();
1.711 +}
1.712 +
1.713 +void
1.714 +nsHTMLCSSUtils::GetCSSPropertyAtom(nsCSSEditableProperty aProperty, nsIAtom ** aAtom)
1.715 +{
1.716 + *aAtom = nullptr;
1.717 + switch (aProperty) {
1.718 + case eCSSEditableProperty_background_color:
1.719 + *aAtom = nsEditProperty::cssBackgroundColor;
1.720 + break;
1.721 + case eCSSEditableProperty_background_image:
1.722 + *aAtom = nsEditProperty::cssBackgroundImage;
1.723 + break;
1.724 + case eCSSEditableProperty_border:
1.725 + *aAtom = nsEditProperty::cssBorder;
1.726 + break;
1.727 + case eCSSEditableProperty_caption_side:
1.728 + *aAtom = nsEditProperty::cssCaptionSide;
1.729 + break;
1.730 + case eCSSEditableProperty_color:
1.731 + *aAtom = nsEditProperty::cssColor;
1.732 + break;
1.733 + case eCSSEditableProperty_float:
1.734 + *aAtom = nsEditProperty::cssFloat;
1.735 + break;
1.736 + case eCSSEditableProperty_font_family:
1.737 + *aAtom = nsEditProperty::cssFontFamily;
1.738 + break;
1.739 + case eCSSEditableProperty_font_size:
1.740 + *aAtom = nsEditProperty::cssFontSize;
1.741 + break;
1.742 + case eCSSEditableProperty_font_style:
1.743 + *aAtom = nsEditProperty::cssFontStyle;
1.744 + break;
1.745 + case eCSSEditableProperty_font_weight:
1.746 + *aAtom = nsEditProperty::cssFontWeight;
1.747 + break;
1.748 + case eCSSEditableProperty_height:
1.749 + *aAtom = nsEditProperty::cssHeight;
1.750 + break;
1.751 + case eCSSEditableProperty_list_style_type:
1.752 + *aAtom = nsEditProperty::cssListStyleType;
1.753 + break;
1.754 + case eCSSEditableProperty_margin_left:
1.755 + *aAtom = nsEditProperty::cssMarginLeft;
1.756 + break;
1.757 + case eCSSEditableProperty_margin_right:
1.758 + *aAtom = nsEditProperty::cssMarginRight;
1.759 + break;
1.760 + case eCSSEditableProperty_text_align:
1.761 + *aAtom = nsEditProperty::cssTextAlign;
1.762 + break;
1.763 + case eCSSEditableProperty_text_decoration:
1.764 + *aAtom = nsEditProperty::cssTextDecoration;
1.765 + break;
1.766 + case eCSSEditableProperty_vertical_align:
1.767 + *aAtom = nsEditProperty::cssVerticalAlign;
1.768 + break;
1.769 + case eCSSEditableProperty_whitespace:
1.770 + *aAtom = nsEditProperty::cssWhitespace;
1.771 + break;
1.772 + case eCSSEditableProperty_width:
1.773 + *aAtom = nsEditProperty::cssWidth;
1.774 + break;
1.775 + case eCSSEditableProperty_NONE:
1.776 + // intentionally empty
1.777 + break;
1.778 + }
1.779 +}
1.780 +
1.781 +// Populate aProperty and aValueArray with the CSS declarations equivalent to the
1.782 +// value aValue according to the equivalence table aEquivTable
1.783 +void
1.784 +nsHTMLCSSUtils::BuildCSSDeclarations(nsTArray<nsIAtom*> & aPropertyArray,
1.785 + nsTArray<nsString> & aValueArray,
1.786 + const CSSEquivTable * aEquivTable,
1.787 + const nsAString * aValue,
1.788 + bool aGetOrRemoveRequest)
1.789 +{
1.790 + // clear arrays
1.791 + aPropertyArray.Clear();
1.792 + aValueArray.Clear();
1.793 +
1.794 + // if we have an input value, let's use it
1.795 + nsAutoString value, lowerCasedValue;
1.796 + if (aValue) {
1.797 + value.Assign(*aValue);
1.798 + lowerCasedValue.Assign(*aValue);
1.799 + ToLowerCase(lowerCasedValue);
1.800 + }
1.801 +
1.802 + int8_t index = 0;
1.803 + nsCSSEditableProperty cssProperty = aEquivTable[index].cssProperty;
1.804 + while (cssProperty) {
1.805 + if (!aGetOrRemoveRequest|| aEquivTable[index].gettable) {
1.806 + nsAutoString cssValue, cssPropertyString;
1.807 + nsIAtom * cssPropertyAtom;
1.808 + // find the equivalent css value for the index-th property in
1.809 + // the equivalence table
1.810 + (*aEquivTable[index].processValueFunctor) ((!aGetOrRemoveRequest || aEquivTable[index].caseSensitiveValue) ? &value : &lowerCasedValue,
1.811 + cssValue,
1.812 + aEquivTable[index].defaultValue,
1.813 + aEquivTable[index].prependValue,
1.814 + aEquivTable[index].appendValue);
1.815 + GetCSSPropertyAtom(cssProperty, &cssPropertyAtom);
1.816 + aPropertyArray.AppendElement(cssPropertyAtom);
1.817 + aValueArray.AppendElement(cssValue);
1.818 + }
1.819 + index++;
1.820 + cssProperty = aEquivTable[index].cssProperty;
1.821 + }
1.822 +}
1.823 +
1.824 +// Populate cssPropertyArray and cssValueArray with the declarations equivalent
1.825 +// to aHTMLProperty/aAttribute/aValue for the node aNode
1.826 +void
1.827 +nsHTMLCSSUtils::GenerateCSSDeclarationsFromHTMLStyle(dom::Element* aElement,
1.828 + nsIAtom* aHTMLProperty,
1.829 + const nsAString* aAttribute,
1.830 + const nsAString* aValue,
1.831 + nsTArray<nsIAtom*>& cssPropertyArray,
1.832 + nsTArray<nsString>& cssValueArray,
1.833 + bool aGetOrRemoveRequest)
1.834 +{
1.835 + MOZ_ASSERT(aElement);
1.836 + nsIAtom* tagName = aElement->Tag();
1.837 + const nsHTMLCSSUtils::CSSEquivTable* equivTable = nullptr;
1.838 +
1.839 + if (nsEditProperty::b == aHTMLProperty) {
1.840 + equivTable = boldEquivTable;
1.841 + } else if (nsEditProperty::i == aHTMLProperty) {
1.842 + equivTable = italicEquivTable;
1.843 + } else if (nsEditProperty::u == aHTMLProperty) {
1.844 + equivTable = underlineEquivTable;
1.845 + } else if (nsEditProperty::strike == aHTMLProperty) {
1.846 + equivTable = strikeEquivTable;
1.847 + } else if (nsEditProperty::tt == aHTMLProperty) {
1.848 + equivTable = ttEquivTable;
1.849 + } else if (aAttribute) {
1.850 + if (nsEditProperty::font == aHTMLProperty &&
1.851 + aAttribute->EqualsLiteral("color")) {
1.852 + equivTable = fontColorEquivTable;
1.853 + } else if (nsEditProperty::font == aHTMLProperty &&
1.854 + aAttribute->EqualsLiteral("face")) {
1.855 + equivTable = fontFaceEquivTable;
1.856 + } else if (aAttribute->EqualsLiteral("bgcolor")) {
1.857 + equivTable = bgcolorEquivTable;
1.858 + } else if (aAttribute->EqualsLiteral("background")) {
1.859 + equivTable = backgroundImageEquivTable;
1.860 + } else if (aAttribute->EqualsLiteral("text")) {
1.861 + equivTable = textColorEquivTable;
1.862 + } else if (aAttribute->EqualsLiteral("border")) {
1.863 + equivTable = borderEquivTable;
1.864 + } else if (aAttribute->EqualsLiteral("align")) {
1.865 + if (nsEditProperty::table == tagName) {
1.866 + equivTable = tableAlignEquivTable;
1.867 + } else if (nsEditProperty::hr == tagName) {
1.868 + equivTable = hrAlignEquivTable;
1.869 + } else if (nsEditProperty::legend == tagName ||
1.870 + nsEditProperty::caption == tagName) {
1.871 + equivTable = captionAlignEquivTable;
1.872 + } else {
1.873 + equivTable = textAlignEquivTable;
1.874 + }
1.875 + } else if (aAttribute->EqualsLiteral("valign")) {
1.876 + equivTable = verticalAlignEquivTable;
1.877 + } else if (aAttribute->EqualsLiteral("nowrap")) {
1.878 + equivTable = nowrapEquivTable;
1.879 + } else if (aAttribute->EqualsLiteral("width")) {
1.880 + equivTable = widthEquivTable;
1.881 + } else if (aAttribute->EqualsLiteral("height") ||
1.882 + (nsEditProperty::hr == tagName &&
1.883 + aAttribute->EqualsLiteral("size"))) {
1.884 + equivTable = heightEquivTable;
1.885 + } else if (aAttribute->EqualsLiteral("type") &&
1.886 + (nsEditProperty::ol == tagName
1.887 + || nsEditProperty::ul == tagName
1.888 + || nsEditProperty::li == tagName)) {
1.889 + equivTable = listStyleTypeEquivTable;
1.890 + }
1.891 + }
1.892 + if (equivTable) {
1.893 + BuildCSSDeclarations(cssPropertyArray, cssValueArray, equivTable,
1.894 + aValue, aGetOrRemoveRequest);
1.895 + }
1.896 +}
1.897 +
1.898 +// Add to aNode the CSS inline style equivalent to HTMLProperty/aAttribute/
1.899 +// aValue for the node, and return in aCount the number of CSS properties set
1.900 +// by the call. The dom::Element version returns aCount instead.
1.901 +int32_t
1.902 +nsHTMLCSSUtils::SetCSSEquivalentToHTMLStyle(dom::Element* aElement,
1.903 + nsIAtom* aProperty,
1.904 + const nsAString* aAttribute,
1.905 + const nsAString* aValue,
1.906 + bool aSuppressTransaction)
1.907 +{
1.908 + MOZ_ASSERT(aElement && aProperty);
1.909 + MOZ_ASSERT_IF(aAttribute, aValue);
1.910 + int32_t count;
1.911 + // This can only fail if SetCSSProperty fails, which should only happen if
1.912 + // something is pretty badly wrong. In this case we assert so that hopefully
1.913 + // someone will notice, but there's nothing more sensible to do than just
1.914 + // return the count and carry on.
1.915 + nsresult res = SetCSSEquivalentToHTMLStyle(aElement->AsDOMNode(),
1.916 + aProperty, aAttribute,
1.917 + aValue, &count,
1.918 + aSuppressTransaction);
1.919 + NS_ASSERTION(NS_SUCCEEDED(res), "SetCSSEquivalentToHTMLStyle failed");
1.920 + NS_ENSURE_SUCCESS(res, count);
1.921 + return count;
1.922 +}
1.923 +
1.924 +nsresult
1.925 +nsHTMLCSSUtils::SetCSSEquivalentToHTMLStyle(nsIDOMNode * aNode,
1.926 + nsIAtom *aHTMLProperty,
1.927 + const nsAString *aAttribute,
1.928 + const nsAString *aValue,
1.929 + int32_t * aCount,
1.930 + bool aSuppressTransaction)
1.931 +{
1.932 + nsCOMPtr<dom::Element> element = do_QueryInterface(aNode);
1.933 + *aCount = 0;
1.934 + if (!element || !IsCSSEditableProperty(element, aHTMLProperty, aAttribute)) {
1.935 + return NS_OK;
1.936 + }
1.937 +
1.938 + // we can apply the styles only if the node is an element and if we have
1.939 + // an equivalence for the requested HTML style in this implementation
1.940 +
1.941 + // Find the CSS equivalence to the HTML style
1.942 + nsTArray<nsIAtom*> cssPropertyArray;
1.943 + nsTArray<nsString> cssValueArray;
1.944 + GenerateCSSDeclarationsFromHTMLStyle(element, aHTMLProperty, aAttribute,
1.945 + aValue, cssPropertyArray, cssValueArray,
1.946 + false);
1.947 +
1.948 + nsCOMPtr<nsIDOMElement> domElement = do_QueryInterface(element);
1.949 + // set the individual CSS inline styles
1.950 + *aCount = cssPropertyArray.Length();
1.951 + for (int32_t index = 0; index < *aCount; index++) {
1.952 + nsresult res = SetCSSProperty(domElement, cssPropertyArray[index],
1.953 + cssValueArray[index], aSuppressTransaction);
1.954 + NS_ENSURE_SUCCESS(res, res);
1.955 + }
1.956 + return NS_OK;
1.957 +}
1.958 +
1.959 +// Remove from aNode the CSS inline style equivalent to HTMLProperty/aAttribute/aValue for the node
1.960 +nsresult
1.961 +nsHTMLCSSUtils::RemoveCSSEquivalentToHTMLStyle(nsIDOMNode * aNode,
1.962 + nsIAtom *aHTMLProperty,
1.963 + const nsAString *aAttribute,
1.964 + const nsAString *aValue,
1.965 + bool aSuppressTransaction)
1.966 +{
1.967 + nsCOMPtr<dom::Element> element = do_QueryInterface(aNode);
1.968 + NS_ENSURE_TRUE(element, NS_OK);
1.969 +
1.970 + return RemoveCSSEquivalentToHTMLStyle(element, aHTMLProperty, aAttribute,
1.971 + aValue, aSuppressTransaction);
1.972 +}
1.973 +
1.974 +nsresult
1.975 +nsHTMLCSSUtils::RemoveCSSEquivalentToHTMLStyle(dom::Element* aElement,
1.976 + nsIAtom* aHTMLProperty,
1.977 + const nsAString* aAttribute,
1.978 + const nsAString* aValue,
1.979 + bool aSuppressTransaction)
1.980 +{
1.981 + MOZ_ASSERT(aElement);
1.982 +
1.983 + if (!IsCSSEditableProperty(aElement, aHTMLProperty, aAttribute)) {
1.984 + return NS_OK;
1.985 + }
1.986 +
1.987 + // we can apply the styles only if the node is an element and if we have
1.988 + // an equivalence for the requested HTML style in this implementation
1.989 +
1.990 + // Find the CSS equivalence to the HTML style
1.991 + nsTArray<nsIAtom*> cssPropertyArray;
1.992 + nsTArray<nsString> cssValueArray;
1.993 + GenerateCSSDeclarationsFromHTMLStyle(aElement, aHTMLProperty, aAttribute,
1.994 + aValue, cssPropertyArray, cssValueArray,
1.995 + true);
1.996 +
1.997 + nsCOMPtr<nsIDOMElement> domElement = do_QueryInterface(aElement);
1.998 + // remove the individual CSS inline styles
1.999 + int32_t count = cssPropertyArray.Length();
1.1000 + for (int32_t index = 0; index < count; index++) {
1.1001 + nsresult res = RemoveCSSProperty(domElement,
1.1002 + cssPropertyArray[index],
1.1003 + cssValueArray[index],
1.1004 + aSuppressTransaction);
1.1005 + NS_ENSURE_SUCCESS(res, res);
1.1006 + }
1.1007 + return NS_OK;
1.1008 +}
1.1009 +
1.1010 +// returns in aValueString the list of values for the CSS equivalences to
1.1011 +// the HTML style aHTMLProperty/aAttribute/aValueString for the node aNode;
1.1012 +// the value of aStyleType controls the styles we retrieve : specified or
1.1013 +// computed.
1.1014 +nsresult
1.1015 +nsHTMLCSSUtils::GetCSSEquivalentToHTMLInlineStyleSet(nsINode* aNode,
1.1016 + nsIAtom *aHTMLProperty,
1.1017 + const nsAString *aAttribute,
1.1018 + nsAString & aValueString,
1.1019 + StyleType aStyleType)
1.1020 +{
1.1021 + aValueString.Truncate();
1.1022 + nsCOMPtr<dom::Element> theElement = GetElementContainerOrSelf(aNode);
1.1023 + NS_ENSURE_TRUE(theElement, NS_ERROR_NULL_POINTER);
1.1024 +
1.1025 + if (!theElement || !IsCSSEditableProperty(theElement, aHTMLProperty, aAttribute)) {
1.1026 + return NS_OK;
1.1027 + }
1.1028 +
1.1029 + // Yes, the requested HTML style has a CSS equivalence in this implementation
1.1030 + nsTArray<nsIAtom*> cssPropertyArray;
1.1031 + nsTArray<nsString> cssValueArray;
1.1032 + // get the CSS equivalence with last param true indicating we want only the
1.1033 + // "gettable" properties
1.1034 + GenerateCSSDeclarationsFromHTMLStyle(theElement, aHTMLProperty, aAttribute, nullptr,
1.1035 + cssPropertyArray, cssValueArray, true);
1.1036 + int32_t count = cssPropertyArray.Length();
1.1037 + for (int32_t index = 0; index < count; index++) {
1.1038 + nsAutoString valueString;
1.1039 + // retrieve the specified/computed value of the property
1.1040 + nsresult res = GetCSSInlinePropertyBase(theElement, cssPropertyArray[index],
1.1041 + valueString, aStyleType);
1.1042 + NS_ENSURE_SUCCESS(res, res);
1.1043 + // append the value to aValueString (possibly with a leading whitespace)
1.1044 + if (index) {
1.1045 + aValueString.Append(char16_t(' '));
1.1046 + }
1.1047 + aValueString.Append(valueString);
1.1048 + }
1.1049 + return NS_OK;
1.1050 +}
1.1051 +
1.1052 +// Does the node aNode (or its parent, if it's not an element node) have a CSS
1.1053 +// style equivalent to the HTML style aHTMLProperty/aHTMLAttribute/valueString?
1.1054 +// The value of aStyleType controls the styles we retrieve: specified or
1.1055 +// computed. The return value aIsSet is true if the CSS styles are set.
1.1056 +//
1.1057 +// The nsIContent variant returns aIsSet instead of using an out parameter, and
1.1058 +// does not modify aValue.
1.1059 +bool
1.1060 +nsHTMLCSSUtils::IsCSSEquivalentToHTMLInlineStyleSet(nsIContent* aContent,
1.1061 + nsIAtom* aProperty,
1.1062 + const nsAString* aAttribute,
1.1063 + const nsAString& aValue,
1.1064 + StyleType aStyleType)
1.1065 +{
1.1066 + MOZ_ASSERT(aContent && aProperty);
1.1067 + bool isSet;
1.1068 + nsAutoString value(aValue);
1.1069 + nsresult res = IsCSSEquivalentToHTMLInlineStyleSet(aContent->AsDOMNode(),
1.1070 + aProperty, aAttribute,
1.1071 + isSet, value, aStyleType);
1.1072 + NS_ASSERTION(NS_SUCCEEDED(res), "IsCSSEquivalentToHTMLInlineStyleSet failed");
1.1073 + NS_ENSURE_SUCCESS(res, false);
1.1074 + return isSet;
1.1075 +}
1.1076 +
1.1077 +nsresult
1.1078 +nsHTMLCSSUtils::IsCSSEquivalentToHTMLInlineStyleSet(nsIDOMNode *aNode,
1.1079 + nsIAtom *aHTMLProperty,
1.1080 + const nsAString *aHTMLAttribute,
1.1081 + bool& aIsSet,
1.1082 + nsAString& valueString,
1.1083 + StyleType aStyleType)
1.1084 +{
1.1085 + NS_ENSURE_TRUE(aNode, NS_ERROR_NULL_POINTER);
1.1086 +
1.1087 + nsAutoString htmlValueString(valueString);
1.1088 + aIsSet = false;
1.1089 + nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
1.1090 + do {
1.1091 + valueString.Assign(htmlValueString);
1.1092 + // get the value of the CSS equivalent styles
1.1093 + nsresult res = GetCSSEquivalentToHTMLInlineStyleSet(node, aHTMLProperty, aHTMLAttribute,
1.1094 + valueString, aStyleType);
1.1095 + NS_ENSURE_SUCCESS(res, res);
1.1096 +
1.1097 + // early way out if we can
1.1098 + if (valueString.IsEmpty()) {
1.1099 + return NS_OK;
1.1100 + }
1.1101 +
1.1102 + if (nsEditProperty::b == aHTMLProperty) {
1.1103 + if (valueString.EqualsLiteral("bold")) {
1.1104 + aIsSet = true;
1.1105 + } else if (valueString.EqualsLiteral("normal")) {
1.1106 + aIsSet = false;
1.1107 + } else if (valueString.EqualsLiteral("bolder")) {
1.1108 + aIsSet = true;
1.1109 + valueString.AssignLiteral("bold");
1.1110 + } else {
1.1111 + int32_t weight = 0;
1.1112 + nsresult errorCode;
1.1113 + nsAutoString value(valueString);
1.1114 + weight = value.ToInteger(&errorCode);
1.1115 + if (400 < weight) {
1.1116 + aIsSet = true;
1.1117 + valueString.AssignLiteral("bold");
1.1118 + } else {
1.1119 + aIsSet = false;
1.1120 + valueString.AssignLiteral("normal");
1.1121 + }
1.1122 + }
1.1123 + } else if (nsEditProperty::i == aHTMLProperty) {
1.1124 + if (valueString.EqualsLiteral("italic") ||
1.1125 + valueString.EqualsLiteral("oblique")) {
1.1126 + aIsSet = true;
1.1127 + }
1.1128 + } else if (nsEditProperty::u == aHTMLProperty) {
1.1129 + nsAutoString val;
1.1130 + val.AssignLiteral("underline");
1.1131 + aIsSet = bool(ChangeCSSInlineStyleTxn::ValueIncludes(valueString, val, false));
1.1132 + } else if (nsEditProperty::strike == aHTMLProperty) {
1.1133 + nsAutoString val;
1.1134 + val.AssignLiteral("line-through");
1.1135 + aIsSet = bool(ChangeCSSInlineStyleTxn::ValueIncludes(valueString, val, false));
1.1136 + } else if (aHTMLAttribute &&
1.1137 + ((nsEditProperty::font == aHTMLProperty &&
1.1138 + aHTMLAttribute->EqualsLiteral("color")) ||
1.1139 + aHTMLAttribute->EqualsLiteral("bgcolor"))) {
1.1140 + if (htmlValueString.IsEmpty()) {
1.1141 + aIsSet = true;
1.1142 + } else {
1.1143 + nscolor rgba;
1.1144 + nsAutoString subStr;
1.1145 + htmlValueString.Right(subStr, htmlValueString.Length() - 1);
1.1146 + if (NS_ColorNameToRGB(htmlValueString, &rgba) ||
1.1147 + NS_HexToRGB(subStr, &rgba)) {
1.1148 + nsAutoString htmlColor, tmpStr;
1.1149 +
1.1150 + if (NS_GET_A(rgba) != 255) {
1.1151 + // This should only be hit by the "transparent" keyword, which
1.1152 + // currently serializes to "transparent" (not "rgba(0, 0, 0, 0)").
1.1153 + MOZ_ASSERT(NS_GET_R(rgba) == 0 && NS_GET_G(rgba) == 0 &&
1.1154 + NS_GET_B(rgba) == 0 && NS_GET_A(rgba) == 0);
1.1155 + htmlColor.AppendLiteral("transparent");
1.1156 + } else {
1.1157 + htmlColor.AppendLiteral("rgb(");
1.1158 +
1.1159 + NS_NAMED_LITERAL_STRING(comma, ", ");
1.1160 +
1.1161 + tmpStr.AppendInt(NS_GET_R(rgba), 10);
1.1162 + htmlColor.Append(tmpStr + comma);
1.1163 +
1.1164 + tmpStr.Truncate();
1.1165 + tmpStr.AppendInt(NS_GET_G(rgba), 10);
1.1166 + htmlColor.Append(tmpStr + comma);
1.1167 +
1.1168 + tmpStr.Truncate();
1.1169 + tmpStr.AppendInt(NS_GET_B(rgba), 10);
1.1170 + htmlColor.Append(tmpStr);
1.1171 +
1.1172 + htmlColor.Append(char16_t(')'));
1.1173 + }
1.1174 +
1.1175 + aIsSet = htmlColor.Equals(valueString,
1.1176 + nsCaseInsensitiveStringComparator());
1.1177 + } else {
1.1178 + aIsSet = htmlValueString.Equals(valueString,
1.1179 + nsCaseInsensitiveStringComparator());
1.1180 + }
1.1181 + }
1.1182 + } else if (nsEditProperty::tt == aHTMLProperty) {
1.1183 + aIsSet = StringBeginsWith(valueString, NS_LITERAL_STRING("monospace"));
1.1184 + } else if (nsEditProperty::font == aHTMLProperty && aHTMLAttribute &&
1.1185 + aHTMLAttribute->EqualsLiteral("face")) {
1.1186 + if (!htmlValueString.IsEmpty()) {
1.1187 + const char16_t commaSpace[] = { char16_t(','), char16_t(' '), 0 };
1.1188 + const char16_t comma[] = { char16_t(','), 0 };
1.1189 + htmlValueString.ReplaceSubstring(commaSpace, comma);
1.1190 + nsAutoString valueStringNorm(valueString);
1.1191 + valueStringNorm.ReplaceSubstring(commaSpace, comma);
1.1192 + aIsSet = htmlValueString.Equals(valueStringNorm,
1.1193 + nsCaseInsensitiveStringComparator());
1.1194 + } else {
1.1195 + // ignore this, it's TT or our default
1.1196 + nsAutoString valueStringLower;
1.1197 + ToLowerCase(valueString, valueStringLower);
1.1198 + aIsSet = !valueStringLower.EqualsLiteral("monospace") &&
1.1199 + !valueStringLower.EqualsLiteral("serif");
1.1200 + }
1.1201 + return NS_OK;
1.1202 + } else if (aHTMLAttribute && aHTMLAttribute->EqualsLiteral("align")) {
1.1203 + aIsSet = true;
1.1204 + } else {
1.1205 + aIsSet = false;
1.1206 + return NS_OK;
1.1207 + }
1.1208 +
1.1209 + if (!htmlValueString.IsEmpty() &&
1.1210 + htmlValueString.Equals(valueString,
1.1211 + nsCaseInsensitiveStringComparator())) {
1.1212 + aIsSet = true;
1.1213 + }
1.1214 +
1.1215 + if (htmlValueString.EqualsLiteral("-moz-editor-invert-value")) {
1.1216 + aIsSet = !aIsSet;
1.1217 + }
1.1218 +
1.1219 + if (nsEditProperty::u == aHTMLProperty || nsEditProperty::strike == aHTMLProperty) {
1.1220 + // unfortunately, the value of the text-decoration property is not inherited.
1.1221 + // that means that we have to look at ancestors of node to see if they are underlined
1.1222 + node = node->GetParentElement(); // set to null if it's not a dom element
1.1223 + }
1.1224 + } while ((nsEditProperty::u == aHTMLProperty || nsEditProperty::strike == aHTMLProperty) &&
1.1225 + !aIsSet && node);
1.1226 + return NS_OK;
1.1227 +}
1.1228 +
1.1229 +void
1.1230 +nsHTMLCSSUtils::SetCSSEnabled(bool aIsCSSPrefChecked)
1.1231 +{
1.1232 + mIsCSSPrefChecked = aIsCSSPrefChecked;
1.1233 +}
1.1234 +
1.1235 +bool
1.1236 +nsHTMLCSSUtils::IsCSSPrefChecked()
1.1237 +{
1.1238 + return mIsCSSPrefChecked ;
1.1239 +}
1.1240 +
1.1241 +// ElementsSameStyle compares two elements and checks if they have the same
1.1242 +// specified CSS declarations in the STYLE attribute
1.1243 +// The answer is always negative if at least one of them carries an ID or a class
1.1244 +bool
1.1245 +nsHTMLCSSUtils::ElementsSameStyle(nsIDOMNode *aFirstNode, nsIDOMNode *aSecondNode)
1.1246 +{
1.1247 + nsCOMPtr<dom::Element> firstElement = do_QueryInterface(aFirstNode);
1.1248 + nsCOMPtr<dom::Element> secondElement = do_QueryInterface(aSecondNode);
1.1249 +
1.1250 + NS_ASSERTION((firstElement && secondElement), "Non element nodes passed to ElementsSameStyle.");
1.1251 + NS_ENSURE_TRUE(firstElement, false);
1.1252 + NS_ENSURE_TRUE(secondElement, false);
1.1253 +
1.1254 + return ElementsSameStyle(firstElement, secondElement);
1.1255 +}
1.1256 +
1.1257 +bool
1.1258 +nsHTMLCSSUtils::ElementsSameStyle(dom::Element* aFirstElement,
1.1259 + dom::Element* aSecondElement)
1.1260 +{
1.1261 + MOZ_ASSERT(aFirstElement);
1.1262 + MOZ_ASSERT(aSecondElement);
1.1263 +
1.1264 + if (aFirstElement->HasAttr(kNameSpaceID_None, nsGkAtoms::id) ||
1.1265 + aSecondElement->HasAttr(kNameSpaceID_None, nsGkAtoms::id)) {
1.1266 + // at least one of the spans carries an ID ; suspect a CSS rule applies to it and
1.1267 + // refuse to merge the nodes
1.1268 + return false;
1.1269 + }
1.1270 +
1.1271 + nsAutoString firstClass, secondClass;
1.1272 + bool isFirstClassSet = aFirstElement->GetAttr(kNameSpaceID_None, nsGkAtoms::_class, firstClass);
1.1273 + bool isSecondClassSet = aSecondElement->GetAttr(kNameSpaceID_None, nsGkAtoms::_class, secondClass);
1.1274 + if (isFirstClassSet && isSecondClassSet) {
1.1275 + // both spans carry a class, let's compare them
1.1276 + if (!firstClass.Equals(secondClass)) {
1.1277 + // WARNING : technically, the comparison just above is questionable :
1.1278 + // from a pure HTML/CSS point of view class="a b" is NOT the same than
1.1279 + // class="b a" because a CSS rule could test the exact value of the class
1.1280 + // attribute to be "a b" for instance ; from a user's point of view, a
1.1281 + // wysiwyg editor should probably NOT make any difference. CSS people
1.1282 + // need to discuss this issue before any modification.
1.1283 + return false;
1.1284 + }
1.1285 + } else if (isFirstClassSet || isSecondClassSet) {
1.1286 + // one span only carries a class, early way out
1.1287 + return false;
1.1288 + }
1.1289 +
1.1290 + nsCOMPtr<nsIDOMCSSStyleDeclaration> firstCSSDecl, secondCSSDecl;
1.1291 + uint32_t firstLength, secondLength;
1.1292 + nsresult rv = GetInlineStyles(aFirstElement, getter_AddRefs(firstCSSDecl), &firstLength);
1.1293 + if (NS_FAILED(rv) || !firstCSSDecl) {
1.1294 + return false;
1.1295 + }
1.1296 + rv = GetInlineStyles(aSecondElement, getter_AddRefs(secondCSSDecl), &secondLength);
1.1297 + if (NS_FAILED(rv) || !secondCSSDecl) {
1.1298 + return false;
1.1299 + }
1.1300 +
1.1301 + if (firstLength != secondLength) {
1.1302 + // early way out if we can
1.1303 + return false;
1.1304 + }
1.1305 +
1.1306 + if (!firstLength) {
1.1307 + // no inline style !
1.1308 + return true;
1.1309 + }
1.1310 +
1.1311 + nsAutoString propertyNameString;
1.1312 + nsAutoString firstValue, secondValue;
1.1313 + for (uint32_t i = 0; i < firstLength; i++) {
1.1314 + firstCSSDecl->Item(i, propertyNameString);
1.1315 + firstCSSDecl->GetPropertyValue(propertyNameString, firstValue);
1.1316 + secondCSSDecl->GetPropertyValue(propertyNameString, secondValue);
1.1317 + if (!firstValue.Equals(secondValue)) {
1.1318 + return false;
1.1319 + }
1.1320 + }
1.1321 + for (uint32_t i = 0; i < secondLength; i++) {
1.1322 + secondCSSDecl->Item(i, propertyNameString);
1.1323 + secondCSSDecl->GetPropertyValue(propertyNameString, secondValue);
1.1324 + firstCSSDecl->GetPropertyValue(propertyNameString, firstValue);
1.1325 + if (!firstValue.Equals(secondValue)) {
1.1326 + return false;
1.1327 + }
1.1328 + }
1.1329 +
1.1330 + return true;
1.1331 +}
1.1332 +
1.1333 +nsresult
1.1334 +nsHTMLCSSUtils::GetInlineStyles(dom::Element* aElement,
1.1335 + nsIDOMCSSStyleDeclaration** aCssDecl,
1.1336 + uint32_t* aLength)
1.1337 +{
1.1338 + return GetInlineStyles(static_cast<nsISupports*>(aElement), aCssDecl, aLength);
1.1339 +}
1.1340 +
1.1341 +nsresult
1.1342 +nsHTMLCSSUtils::GetInlineStyles(nsIDOMElement* aElement,
1.1343 + nsIDOMCSSStyleDeclaration** aCssDecl,
1.1344 + uint32_t* aLength)
1.1345 +{
1.1346 + return GetInlineStyles(static_cast<nsISupports*>(aElement), aCssDecl, aLength);
1.1347 +}
1.1348 +
1.1349 +nsresult
1.1350 +nsHTMLCSSUtils::GetInlineStyles(nsISupports *aElement,
1.1351 + nsIDOMCSSStyleDeclaration **aCssDecl,
1.1352 + uint32_t *aLength)
1.1353 +{
1.1354 + NS_ENSURE_TRUE(aElement && aLength, NS_ERROR_NULL_POINTER);
1.1355 + *aLength = 0;
1.1356 + nsCOMPtr<nsIDOMElementCSSInlineStyle> inlineStyles = do_QueryInterface(aElement);
1.1357 + NS_ENSURE_TRUE(inlineStyles, NS_ERROR_NULL_POINTER);
1.1358 +
1.1359 + nsresult res = inlineStyles->GetStyle(aCssDecl);
1.1360 + NS_ENSURE_SUCCESS(res, NS_ERROR_NULL_POINTER);
1.1361 + MOZ_ASSERT(*aCssDecl);
1.1362 +
1.1363 + (*aCssDecl)->GetLength(aLength);
1.1364 + return NS_OK;
1.1365 +}
1.1366 +
1.1367 +already_AddRefed<nsIDOMElement>
1.1368 +nsHTMLCSSUtils::GetElementContainerOrSelf(nsIDOMNode* aNode)
1.1369 +{
1.1370 + nsCOMPtr<nsINode> node = do_QueryInterface(aNode);
1.1371 + NS_ENSURE_TRUE(node, nullptr);
1.1372 + nsCOMPtr<nsIDOMElement> element =
1.1373 + do_QueryInterface(GetElementContainerOrSelf(node));
1.1374 + return element.forget();
1.1375 +}
1.1376 +
1.1377 +dom::Element*
1.1378 +nsHTMLCSSUtils::GetElementContainerOrSelf(nsINode* aNode)
1.1379 +{
1.1380 + MOZ_ASSERT(aNode);
1.1381 + if (nsIDOMNode::DOCUMENT_NODE == aNode->NodeType()) {
1.1382 + return nullptr;
1.1383 + }
1.1384 +
1.1385 + nsINode* node = aNode;
1.1386 + // Loop until we find an element.
1.1387 + while (node && !node->IsElement()) {
1.1388 + node = node->GetParentNode();
1.1389 + }
1.1390 +
1.1391 + NS_ENSURE_TRUE(node, nullptr);
1.1392 + return node->AsElement();
1.1393 +}
1.1394 +
1.1395 +nsresult
1.1396 +nsHTMLCSSUtils::SetCSSProperty(nsIDOMElement * aElement,
1.1397 + const nsAString & aProperty,
1.1398 + const nsAString & aValue)
1.1399 +{
1.1400 + nsCOMPtr<nsIDOMCSSStyleDeclaration> cssDecl;
1.1401 + uint32_t length;
1.1402 + nsresult res = GetInlineStyles(aElement, getter_AddRefs(cssDecl), &length);
1.1403 + if (NS_FAILED(res) || !cssDecl) return res;
1.1404 +
1.1405 + return cssDecl->SetProperty(aProperty,
1.1406 + aValue,
1.1407 + EmptyString());
1.1408 +}
1.1409 +
1.1410 +nsresult
1.1411 +nsHTMLCSSUtils::SetCSSPropertyPixels(nsIDOMElement * aElement,
1.1412 + const nsAString & aProperty,
1.1413 + int32_t aIntValue)
1.1414 +{
1.1415 + nsAutoString s;
1.1416 + s.AppendInt(aIntValue);
1.1417 + return SetCSSProperty(aElement, aProperty, s + NS_LITERAL_STRING("px"));
1.1418 +}
