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HtmlParserEx.pas
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{
Html解析器.
最近因为用到Html解析功能.在网上找了几款Delphi版本的,结果发现解析复杂的HTML都有一些问题.
没办法自己写了一款,经测试到现在没遇到任何解析不了的Html.
wr960204 武稀松 2013
http://www.raysoftware.cn/?p=370
感谢牛人杨延哲在HTML语法和CSS语法方面的帮助.
Thank Yang Yanzhe.
http://www.pockhero.com/
本版本只支持DelphiXE3之后的版本.如果用早期Delphi请使用HTMLParser.pas文件.
支持Windows,MacOSX,iOS,Android平台,完全去掉了对指针的使用.防止以后易博龙去掉
移动平台对指针的支持.
脱离了对旧版本的支持,甩掉包袱开发起来真的很爽!
---------------------------------------------------------------------------------
ying32修改记录
Email:[email protected]
2017年06月20日
1、为IHtmlElementList增加for in 语法支持
2017年05月04日
1、去除RegularExpressions单元的引用，不再使用TRegEx改使用RegularExpressionsCore单元中的TPerlRegEx
2017年04月19日
1、增加使用XPath功能的编译指令"UseXPath"，默认不使用XPath，个人感觉没什么用
2016年11月23日
1、简单支持XPath，简单的吧，利用xpath转css selector，嘿
xpath转换的代码改自python版本：https://github.com/santiycr/cssify/blob/master/cssify.py
另外对正则System.RegularExpressions.pas中TGroupCollection.GetItem进行了改进，没有找到命名组
且非PCRE_ERROR_NOSUBSTRING时返回空的，而不是抛出一个异常。暂时就简单粗爆的直接改吧，官方网站
上看到有人提过这个QC，不知道后面有没有解决。
2016年11月15日
IHtmlElement和THtmlElement的改变：
1、Attributes属性增加Set方法
2、TagName属性增加Set方法
3、增加Parent属性
4、增加RemoveAttr方法
5、增加Remove方法
6、增加RemoveChild方法
7、增加Find方法，此为SimpleCSSSelector的一个另名
8、_GetHtml不再直接附加FOrignal属性值，而是使用GetSelfHtml重新对修改后的元素进行赋值操作，并更新FOrignal的值
9、增加Text属性
使用例：
EL.Attributes['class'] := 'xxxx';
EL.TagName = 'a';
EL.Remove 移除自己
EL.RemoveChild(El2);
El.Find('a');
IHtmlElementList和THtmlElementList的改变：
1、增加RemoveAll方法
2、增加Remove方法
3、增加Each方法
4、增加Text属性
// 使用例：
// 移除选择的元素
LHtml.Find('a').RemoveAll
// 查找并遍沥
LHtml.Find('a').Each(
procedure(AIndex: Integer; AEl: IHtmlElement)
begin
Writeln('Index=', AIndex, ', href=', AEl.Attributes['href']);
end);
// 直接输出，仅选中的第一个元素
Writeln(LHtml.Find('title').Text);
}
unit HtmlParserEx;
{'$DEFINE UseXPath}
{$IF RTLVersion < 24.0}
{$MESSAGE ERROR '只支持XE3及之后的版本'}
{$ENDIF}
interface
uses
SysUtils,
Classes,
Generics.Collections
{$IFDEF UseXPath}
,RegularExpressionsCore
{$ENDIF};
{$IF (defined(IOS) and defined(CPUARM)) or defined(ANDROID)}
{$DEFINE MOBILE_DEV}
{$ENDIF}
const
LowStrIndex = Low(string); // 移动平台=0,个人电脑平台=1
type
{$IFNDEF MSWINDOWS}
{ 接口使用WideString是为了可以给例如C++,VB等语言使用.
但是如果离开了Windows平台,其他平台是没有WideString这个COM的数据类型的.
}
WideString = String;
{$ENDIF}
IHtmlElement = interface;
IHtmlElementList = interface;
TElementEachEvent = reference to procedure(AIndex: Integer; AEl: IHtmlElement);
IHtmlElement = interface
['{8C75239C-8CFA-499F-B115-7CEBEDFB421B}']
function GetParent: IHtmlElement; stdcall;
function GetTagName: WideString; stdcall;
procedure SetTagName(Value: WideString); stdcall;
function GetContent: WideString; stdcall;
function GetOrignal: WideString; stdcall;
function GetChildrenCount: Integer; stdcall;
function GetChildren(Index: Integer): IHtmlElement; stdcall;
function GetCloseTag: IHtmlElement; stdcall;
function GetInnerHtml(): WideString; stdcall;
function GetOuterHtml(): WideString; stdcall;
function GetInnerText(): WideString; stdcall;
procedure SetInnerText(Value: WideString); stdcall;
function GetAttributes(Key: WideString): WideString; stdcall;
procedure SetAttributes(Key: WideString; Value: WideString); stdcall;
procedure RemoveAttr(AAttrName: string); stdcall;
function GetSourceLineNum(): Integer; stdcall;
function GetSourceColNum(): Integer; stdcall;
// 增加移除节点
function RemoveChild(ANode: IHtmlElement): Integer; stdcall;
procedure Remove; stdcall;
function AppedChild(const ATag: string): IHtmlElement; stdcall;
// 属性是否存在
function HasAttribute(AttributeName: WideString): Boolean; stdcall;
{ 用CSS选择器语法查找Element,不支持"伪类"
CSS Selector Style search,not support Pseudo-classes.
http://www.w3.org/TR/CSS2/selector.html
}
function SimpleCSSSelector(const selector: WideString): IHtmlElementList; stdcall;
function Find(const selector: WideString): IHtmlElementList; stdcall;
{$IFDEF UseXPath}
function FindX(const AXPath: WideString): IHtmlElementList; stdcall;
{$ENDIF}
// 枚举属性
function EnumAttributeNames(Index: Integer): WideString; stdcall;
property TagName: WideString read GetTagName write SetTagName;
property ChildrenCount: Integer read GetChildrenCount;
property Children[index: Integer]: IHtmlElement read GetChildren; default;
property CloseTag: IHtmlElement read GetCloseTag;
property Content: WideString read GetContent;
property Orignal: WideString read GetOrignal;
property Parent: IHtmlElement read GetParent;
// 获取元素在源代码中的位置
property SourceLineNum: Integer read GetSourceLineNum;
property SourceColNum: Integer read GetSourceColNum;
//
property InnerHtml: WideString read GetInnerHtml;
property OuterHtml: WideString read GetOuterHtml;
property InnerText: WideString read GetInnerText write SetInnerText;
property Text: WideString read GetInnerText write SetInnerText;
property Attributes[Key: WideString]: WideString read GetAttributes write SetAttributes;
// ying32 不改动原来的，只简化使用
property Attrs[Key: WideString]: WideString read GetAttributes write SetAttributes;
end;
THtmlListEnumerator = class
private
FIndex: Integer;
FList: IHtmlElementList;
public
constructor Create(AList: IHtmlElementList);
function GetCurrent: IHtmlElement; inline;
function MoveNext: Boolean;
property Current: IHtmlElement read GetCurrent;
end;
IHtmlElementList = interface
['{8E1380C6-4263-4BF6-8D10-091A86D8E7D9}']
function GetCount: Integer; stdcall;
function GetItems(Index: Integer): IHtmlElement; stdcall;
procedure RemoveAll; stdcall;
procedure Remove(ANode: IHtmlElement); stdcall;
procedure Each(f: TElementEachEvent); stdcall;
function GetText: WideString; stdcall;
function GetEnumerator: THtmlListEnumerator;
property Text: WideString read GetText;
property Count: Integer read GetCount;
property Items[Index: Integer]: IHtmlElement read GetItems; default;
end;
function ParserHTML(const Source: WideString): IHtmlElement; stdcall;
implementation
type
TStringDictionary = TDictionary<string, string>;
TPropDictionary = TDictionary<string, WORD>;
TStringDynArray = TArray<string>;
const
WhiteSpace = [' ', #13, #10, #9];
// CSS Attribute Compare Operator
OperatorChar = ['=', '!', '*', '~', '|', '^', '$'];
MaxListSize = Maxint div 16;
// TagProperty
tpBlock = $01;
tpInline = $02;
tpEmpty = $04;
tpFormatAsInline = $08;
tpPreserveWhitespace = $10;
tpInlineOrEmpty = tpInline or tpEmpty;
type
TAttrOperator = (aoExist, aoEqual, aoNotEqual, aoIncludeWord, aoBeginWord,
aoBegin, aoEnd, aoContain);
PAttrSelectorItem = ^TAttrSelectorItem;
TAttrSelectorItem = record
Key: string;
AttrOperator: TAttrOperator;
Value: string;
end;
TSelectorItemRelation = (sirNONE, sirDescendant, sirChildren,
sirYoungerBrother, sirAllYoungerBrother);
PCSSSelectorItem = ^TCSSSelectorItem;
TCSSSelectorItem = record
Relation: TSelectorItemRelation;
szTag: string;
Attributes: array of TAttrSelectorItem;
end;
TCSSSelectorItems = array of TCSSSelectorItem;
PCSSSelectorItems = ^TCSSSelectorItems;
TCSSSelectorItemGroup = array of TCSSSelectorItems;
//
TSourceContext = record
private
function GetCharOfCurrent(Index: Integer): Char; inline;
public
Code: string;
CodeIndex: Integer;
LineNum: Integer;
ColNum: Integer;
CurrentChar: Char;
{$IFDEF DEBUG}
currentCode: PChar;
{$ENDIF}
procedure IncSrc(); overload; inline;
procedure IncSrc(Step: Integer); overload; inline;
procedure setCode(const ACode: string); inline;
function ReadStr(UntilChars: TSysCharSet): string; inline;
function PeekStr(Index: Integer): string; overload; inline;
function PeekStr(): string; overload; inline;
function subStr(Index, Count: Integer): string; overload; inline;
function subStr(Count: Integer): string; overload; inline;
procedure SkipBlank(); inline;
property charOfCurrent[Index: Integer]: Char read GetCharOfCurrent;
end;
TAttributeItem = record
Key, Value: string;
end;
TAttributeDynArray = TArray<TAttributeItem>;
TIHtmlElementList = class;
THtmlElement = class;
THtmlElementList = TList<THtmlElement>;
THtmlElement = class(TInterfacedObject, IHtmlElement)
private
function GetChildrens: IHtmlElementList;
protected
// ying32
function GetParent: IHtmlElement; stdcall;
function GetTagName: WideString; stdcall;
procedure SetTagName(Value: WideString); stdcall;
function GetContent: WideString; stdcall;
function GetOrignal: WideString; stdcall;
function GetChildrenCount: Integer; stdcall;
function GetChildren(Index: Integer): IHtmlElement; stdcall;
function GetCloseTag: IHtmlElement; stdcall;
function GetInnerHtml(): WideString; stdcall;
function GetOuterHtml(): WideString; stdcall;
function GetInnerText(): WideString; stdcall;
procedure SetInnerText(Value: WideString); stdcall;
function GetAttributes(Key: WideString): WideString; stdcall;
procedure SetAttributes(Key: WideString; Value: WideString); stdcall;
procedure RemoveAttr(AAttrName: string); stdcall;
function GetSourceLineNum(): Integer; stdcall;
function GetSourceColNum(): Integer; stdcall;
// ying32添加
function RemoveChild(ANode: IHtmlElement): Integer; stdcall;
procedure Remove; stdcall;
function AppedChild(const ATag: string): IHtmlElement; stdcall;
// 属性是否存在
function HasAttribute(AttributeName: WideString): Boolean; stdcall;
{ 用CSS选择器语法查找Element,不支持"伪类"
CSS Selector Style search,not support Pseudo-classes.
http://www.w3.org/TR/CSS2/selector.html
}
function SimpleCSSSelector(const selector: WideString): IHtmlElementList; stdcall;
function Find(const selector: WideString): IHtmlElementList; stdcall;
{$IFDEF UseXPath}
function FindX(const AXPath: WideString): IHtmlElementList; stdcall;
{$ENDIF}
// 枚举属性
function EnumAttributeNames(Index: Integer): WideString; stdcall;
property TagName: WideString read GetTagName write SetTagName;
property ChildrenCount: Integer read GetChildrenCount;
property Children[index: Integer]: IHtmlElement read GetChildren; default;
property CloseTag: IHtmlElement read GetCloseTag;
property Content: WideString read GetContent;
property Orignal: WideString read GetOrignal;
property Parent: IHtmlElement read GetParent;
// 获取元素在源代码中的位置
property SourceLineNum: Integer read GetSourceLineNum;
property SourceColNum: Integer read GetSourceColNum;
//
property InnerHtml: WideString read GetInnerHtml;
property OuterHtml: WideString read GetOuterHtml;
property InnerText: WideString read GetInnerText;
property Attributes[Key: WideString]: WideString read GetAttributes write SetAttributes;
property Childrens: IHtmlElementList read GetChildrens;
private
FClosed: Boolean;
//
FOwner: THtmlElement;
FCloseTag: IHtmlElement;
FTagName: string;
FIsCloseTag: Boolean;
FContent: string;
FOrignal: string;
FSourceLine: Integer;
FSourceCol: Integer;
//
FAttributes: TStringDictionary;
FChildren: TIHtmlElementList;
procedure _GetHtml(IncludeSelf: Boolean; Sb: TStringBuilder);
procedure _GetText(IncludeSelf: Boolean; Sb: TStringBuilder);
procedure _SimpleCSSSelector(const ItemGroup: TCSSSelectorItemGroup; r: TIHtmlElementList);
procedure _Select(Item: PCSSSelectorItem; Count: Integer; r: TIHtmlElementList; OnlyTopLevel: Boolean = false);
public
constructor Create(AOwner: THtmlElement; AText: string; ALine, ACol: Integer);
destructor Destroy; override;
end;
TIHtmlElementList = class(TInterfacedObject, IHtmlElementList)
private
// IHtmlElementList
function GetItems(Index: Integer): IHtmlElement; stdcall;
function GetCount: Integer; stdcall;
protected
FList: TList<IHtmlElement>;
procedure SetItems(Index: Integer; const Value: IHtmlElement); inline;
function Add(Value: IHtmlElement): Integer; inline;
procedure Delete(Index: Integer); inline;
procedure Clear; inline;
// ying32添加
procedure RemoveAll; stdcall;
procedure Remove(ANode: IHtmlElement); stdcall;
procedure Each(f: TElementEachEvent); stdcall;
function GetText: WideString; stdcall;
public
constructor Create;
destructor Destroy; override;
function GetEnumerator: THtmlListEnumerator;
function IndexOf(Item: IHtmlElement): Integer;
// IHtmlElementList
property Items[index: Integer]: IHtmlElement read GetItems write SetItems; default;
property Count: Integer read GetCount;
end;
function SplitStr(ACharSet: TSysCharSet; AStr: string): TStringDynArray;
var
L, I: Integer;
S: string;
StrChar: Char;
begin
Result := nil;
if Length(AStr) <= 0 then
Exit;
I := Low(AStr);
L := Low(AStr);
StrChar := #0;
while I <= High(AStr) do
begin
if CharInSet(AStr[I], ['''', '"']) then
if StrChar = #0 then
StrChar := AStr[I]
else if StrChar = AStr[I] then
StrChar := #0;
// 不在字符串中,分隔符才生效
if StrChar = #0 then
if CharInSet(AStr[I], ACharSet) then
begin
if I > L then
begin
S := Copy(AStr, L{$IF (LowStrIndex = 0)} + 1{$ENDIF}, I - L);
SetLength(Result, Length(Result) + 1);
Result[Length(Result) - 1] := S;
end;
L := I + 1;
end;
Inc(I);
end;
if (I > L) then
begin
S := Copy(AStr, L{$IF (LowStrIndex = 0)} + 1{$ENDIF}, I - L);
SetLength(Result, Length(Result) + 1);
Result[Length(Result) - 1] := S;
end;
end;
function StrRight(const Value: string; Count: Integer): string;
var
start: Integer;
begin
start := Length(Value) - Count + 1;
if start <= 0 then
Result := Value
else
Result := Copy(Value, start, Count);
end;
function StrLeft(const Value: string; Count: Integer): string;
begin
Result := Copy(Value, LowStrIndex, Count);
end;
// ComapreAttr
function _aoExist(const Item: TAttrSelectorItem; E: THtmlElement): Boolean;
begin
Result := E.FAttributes.ContainsKey(Item.Key);
end;
function _aoEqual(const Item: TAttrSelectorItem; E: THtmlElement): Boolean;
begin
Result := E.FAttributes.ContainsKey(Item.Key) and
(E.FAttributes[Item.Key] = Item.Value);
end;
function _aoNotEqual(const Item: TAttrSelectorItem; E: THtmlElement): Boolean;
begin
Result := E.FAttributes.ContainsKey(Item.Key) and
(E.FAttributes[Item.Key] <> Item.Value);
end;
function _aoIncludeWord(const Item: TAttrSelectorItem; E: THtmlElement)
: Boolean;
var
S: TStringDynArray;
I: Integer;
begin
Result := false;
if not E.FAttributes.ContainsKey(Item.Key) then
Exit;
Result := True;
S := SplitStr(WhiteSpace, E.FAttributes[Item.Key]);
for I := Low(S) to High(S) do
if S[I] = Item.Value then
Exit;
Result := false;
end;
function _aoBeginWord(const Item: TAttrSelectorItem; E: THtmlElement): Boolean;
var
S: TStringDynArray;
I: Integer;
begin
Result := false;
if not E.FAttributes.ContainsKey(Item.Key) then
Exit;
S := SplitStr((WhiteSpace + ['_', '-']), E.FAttributes[Item.Key]);
Result := (Length(S) > 0) and (S[0] = Item.Value);
end;
function _aoBegin(const Item: TAttrSelectorItem; E: THtmlElement): Boolean;
var
attr, Value: string;
begin
Result := false;
if not E.FAttributes.ContainsKey(Item.Key) then
Exit;
attr := E.FAttributes[Item.Key];
Value := Item.Value;
Result := (Length(attr) > Length(Value)) and
(StrLeft(attr, Length(Value)) = Value);
end;
function _aoEnd(const Item: TAttrSelectorItem; E: THtmlElement): Boolean;
var
attr, Value: string;
begin
Result := false;
if not E.FAttributes.ContainsKey(Item.Key) then
Exit;
attr := E.FAttributes[Item.Key];
Value := Item.Value;
Result := (Length(attr) > Length(Value)) and
(StrRight(attr, Length(Value)) = Value);
end;
function _aoContain(const Item: TAttrSelectorItem; E: THtmlElement): Boolean;
begin
Result := false;
if not E.FAttributes.ContainsKey(Item.Key) then
Exit;
Result := Pos(Item.Value, E.FAttributes[Item.Key]) > 0;
end;
type
TFNCompareAttr = function(const Item: TAttrSelectorItem;
E: THtmlElement): Boolean;
const
AttrCompareFuns: array [TAttrOperator] of TFNCompareAttr = (_aoExist,
_aoEqual, _aoNotEqual, _aoIncludeWord, _aoBeginWord, _aoBegin, _aoEnd,
_aoContain);
function ConvertEntities(S: String): string; forward;
function GetTagProperty(const TagName: string): WORD; forward;
procedure DoError(const Msg: string);
begin
raise Exception.Create(Msg);
end;
procedure _ParserAttrs(var sc: TSourceContext; var Attrs: TAttributeDynArray);
var
Item: TAttributeItem;
begin
SetLength(Attrs, 0);
while True do
begin
sc.SkipBlank();
if sc.CurrentChar = #0 then
Break;
Item.Key := sc.ReadStr((WhiteSpace + [#0, '=']));
Item.Value := '';
sc.SkipBlank;
if sc.CurrentChar = '=' then
begin
sc.IncSrc;
sc.SkipBlank;
Item.Value := sc.ReadStr((WhiteSpace + [#0]));
end;
SetLength(Attrs, Length(Attrs) + 1);
Attrs[Length(Attrs) - 1] := Item;
end;
end;
procedure _ParserNodeItem(S: string; var ATagName: string;
var Attrs: TAttributeDynArray);
var
sc: TSourceContext;
begin
sc.setCode(S);
sc.SkipBlank;
ATagName := UpperCase(sc.ReadStr((WhiteSpace + [#0, '/', '>'])));
_ParserAttrs(sc, Attrs);
end;
function CreateTextElement(AOwner: THtmlElement; AText: string;
ALine, ACol: Integer): THtmlElement;
begin
Result := THtmlElement.Create(AOwner, AText, ALine, ACol);
with Result do
begin
FContent := ConvertEntities(AText);
FTagName := '#TEXT';
FClosed := True;
end;
end;
function CreateScriptElement(AOwner: THtmlElement; AText: string;
ALine, ACol: Integer): THtmlElement;
begin
Result := THtmlElement.Create(AOwner, AText, ALine, ACol);
with Result do
begin
FContent := ConvertEntities(AText);
FTagName := '#SCRIPT';
FClosed := True;
end;
end;
function CreateStyleElement(AOwner: THtmlElement; AText: string;
ALine, ACol: Integer): THtmlElement;
begin
Result := THtmlElement.Create(AOwner, AText, ALine, ACol);
with Result do
begin
FContent := ConvertEntities(AText);
FTagName := '#STYLE';
FClosed := True;
end;
end;
function CreateCommentElement(AOwner: THtmlElement; AText: string;
ALine, ACol: Integer): THtmlElement;
begin
Result := THtmlElement.Create(AOwner, AText, ALine, ACol);
with Result do
begin
FContent := ConvertEntities(AText);
FTagName := '#COMMENT';
FClosed := True;
end;
end;
function CreateTagElement(AOwner: THtmlElement; AText: string;
ALine, ACol: Integer): THtmlElement;
var
Strs: TStringDynArray;
I: Integer;
Attrs: TAttributeDynArray;
begin
Result := THtmlElement.Create(AOwner, AText, ALine, ACol);
with Result do
begin
// TODO 解析TagName和属性
if AText = '' then
Exit;
// 去掉两头的<
if AText[Low(AText)] = '<' then
AText := StrRight(AText, Length(AText) - 1);
if AText = '' then
Exit;
if AText[High(AText)] = '>' then
AText := StrLeft(AText, Length(AText) - 1);
// 检查是关闭节点,还是单个已经关闭的节点
if AText = '' then
Exit;
FClosed := AText[High(AText)] = '/';
FIsCloseTag := AText[LowStrIndex] = '/';
if FIsCloseTag then
AText := StrRight(AText, Length(AText) - 1);
if FClosed then
AText := StrLeft(AText, Length(AText) - 1);
//
_ParserNodeItem(AText, FTagName, Attrs);
for I := Low(Attrs) to High(Attrs) do
FAttributes.AddOrSetValue(LowerCase(Attrs[I].Key),
ConvertEntities(Attrs[I].Value));
end;
end;
function CreateDocTypeElement(AOwner: THtmlElement; AText: string;
ALine, ACol: Integer): THtmlElement;
begin
Result := THtmlElement.Create(AOwner, AText, ALine, ACol);
with Result do
begin
FContent := ConvertEntities(AText);
FTagName := '#DOCTYPE';
FClosed := True;
if FContent = '' then
Exit;
if FContent[1] = '<' then
Delete(FContent, 1, 1);
if FContent = '' then
Exit;
if FContent[Length(FContent)] = '>' then
Delete(FContent, Length(FContent), 1);
FContent := Trim(Copy(Trim(FContent), 9, Length(FContent)));
end;
end;
procedure _ParserHTML(const Source: string; AElementList: THtmlElementList);
var
BeginLineNum, BeginColNum: Integer;
sc: TSourceContext;
function IsEndOfTag(TagName: string): Boolean;
begin
Result := false;
if sc.charOfCurrent[1] = '/' then
begin
Result := UpperCase(sc.subStr(sc.CodeIndex + 2, Length(TagName)))
= UpperCase(TagName);
end;
end;
function PosCharInTag(AChar: Char): Boolean;
var
StrChar: Char;
begin
Result := false;
StrChar := #0;
while True do
begin
if sc.CurrentChar = #0 then
Break;
if sc.CurrentChar = '"' then
begin
if StrChar = #0 then
StrChar := sc.CurrentChar
else
StrChar := #0;
end;
if (sc.CurrentChar = AChar) and (StrChar = #0) then
begin
Result := True;
Break;
end;
sc.IncSrc;
end;
end;
function ParserStyleData(): string;
var
oldIndex: Integer;
begin
oldIndex := sc.CodeIndex;
if sc.subStr(4) = '<!--' then
begin
sc.IncSrc(5);
while True do
begin
if sc.CurrentChar = #0 then
DoError(Format('未完结的Style行:%d;列:%d;', [sc.LineNum, sc.ColNum]))
else if sc.CurrentChar = '>' then
begin
if (sc.charOfCurrent[-1] = '-') and (sc.charOfCurrent[-2] = '-') then
begin
sc.IncSrc;
sc.SkipBlank();
Break;
end;
end;
sc.IncSrc;
end;
end
else
while True do
begin
case sc.CurrentChar of
#0:
begin
Break;
end;
'<':
begin
if IsEndOfTag('style') then
begin
Break;
end;
end;
end;
sc.IncSrc;
end;
Result := sc.subStr(oldIndex, sc.CodeIndex - oldIndex);
end;
function ParserScriptData(): string;
var
oldIndex: Integer;
stringChar: Char;
PreIsblique: Boolean;
begin
oldIndex := sc.CodeIndex;
stringChar := #0;
sc.SkipBlank();
if sc.subStr(4) = '<!--' then
begin
sc.IncSrc(5);
while True do
begin
if sc.CurrentChar = #0 then
DoError(Format('未完结的Script行:%d;列:%d;', [sc.LineNum, sc.ColNum]))
else if sc.CurrentChar = '>' then
begin
if (sc.charOfCurrent[-1] = '-') and (sc.charOfCurrent[-2] = '-') then
begin
sc.IncSrc;
sc.SkipBlank();
Break;
end;
end;
sc.IncSrc;
end;
end
else
begin
while True do
begin
case sc.CurrentChar of
#0:
Break;
'"', '''': // 字符串
begin
stringChar := sc.CurrentChar;
PreIsblique := false;
sc.IncSrc();
while True do
begin
if sc.CurrentChar = #0 then
Break;
if (sc.CurrentChar = stringChar) and (not PreIsblique) then
Break;
if sc.CurrentChar = '\' then
PreIsblique := not PreIsblique
else
PreIsblique := false;
sc.IncSrc;
end;
end;
'/': // 注释
begin
sc.IncSrc();
case sc.CurrentChar of
'/': // 行注释
begin
while True do
begin
if CharInSet(sc.CurrentChar, [#0, #$0A]) then
begin
Break;
end;
sc.IncSrc();
end;
end;
'*': // 块注释
begin
sc.IncSrc();
sc.IncSrc();
while True do
begin
if sc.CurrentChar = #0 then
Break;
if (sc.CurrentChar = '/') and (sc.charOfCurrent[-1] = '*')
then
begin
Break;
end;
sc.IncSrc();
end;
end;
end;
end;
'<':
begin
if IsEndOfTag('script') then
begin
Break;
end;
end;
end;
sc.IncSrc();
end;
end;
Result := sc.subStr(oldIndex, sc.CodeIndex - oldIndex)
end;
var
ElementType: (EtUnknow, EtTag, EtDocType, EtText, EtComment);
OldCodeIndex: Integer;
tmp: string;
Tag: THtmlElement;
begin
sc.setCode(Source);
while sc.CodeIndex <= high(sc.Code) do
begin
ElementType := EtUnknow;
OldCodeIndex := sc.CodeIndex;
BeginLineNum := sc.LineNum;
BeginColNum := sc.ColNum;
if sc.CurrentChar = #0 then
Break;
// "<"开头的就是Tag之类的
if sc.CurrentChar = '<' then
begin
sc.IncSrc;
if sc.CurrentChar = '!' then // 注释
begin
ElementType := EtComment;
sc.IncSrc;
case sc.CurrentChar of
'-': // <!-- -->
begin
sc.IncSrc; // -
while True do
begin
if not PosCharInTag('>') then
DoError('LineNum:' + IntToStr(BeginLineNum) + '无法找到Tag结束点:' +
sc.subStr(100))
else if (sc.charOfCurrent[-1] = '-') and
(sc.charOfCurrent[-2] = '-') then
begin
sc.IncSrc;
Break;
end;
sc.IncSrc;
end;
end;
'[': // <![CDATA[.....]]>
begin
sc.IncSrc; //
while True do
begin
if not PosCharInTag('>') then
DoError('LineNum:' + IntToStr(BeginLineNum) + '无法找到Tag结束点:' +
sc.subStr(100))
else if (sc.charOfCurrent[-1] = ']') then
begin
sc.IncSrc;
Break;
end;
sc.IncSrc;
end;
end;
else // <!.....>
begin
if UpperCase(sc.PeekStr()) = 'DOCTYPE' then
begin
ElementType := EtDocType;
sc.IncSrc; //
if PosCharInTag('>') then
sc.IncSrc
else
DoError('LineNum:' + IntToStr(BeginLineNum) + '无法找到Tag结束点:' +
sc.subStr(100));
end
else
begin
sc.IncSrc; //
if PosCharInTag('>') then
sc.IncSrc
else
DoError('LineNum:' + IntToStr(BeginLineNum) + '无法找到Tag结束点:' +
sc.subStr(100));
end;
end;
end;