forked from KolibriOS/kolibrios
756 lines
16 KiB
Plaintext
756 lines
16 KiB
Plaintext
(*
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Copyright 2016, 2020, 2022, 2023 Anton Krotov
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This file is part of fb2read.
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fb2read is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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fb2read is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with fb2read. If not, see <http://www.gnu.org/licenses/>.
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*)
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MODULE XML;
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IMPORT SU := SysUtils, RF := ReadFile, S := Strings, E := Encoding, V := Vector, tables, LISTS;
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CONST
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tag_p* = 1;
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tag_v* = 2;
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tag_section* = 3;
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tag_stanza* = 4;
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tag_empty_line* = 5;
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tag_subtitle* = 6;
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tag_date* = 7;
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tag_text_author* = 8;
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tag_a* = 9;
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tag_sub* = 10;
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tag_sup* = 11;
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tag_code* = 12;
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tag_poem* = 13;
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tag_title* = 14;
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tag_FictionBook* = 15;
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tag_body* = 16;
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tag_strikethrough* = 17;
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tag_strong* = 18;
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tag_cite* = 19;
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tag_epigraph* = 20;
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tag_emphasis* = 21;
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tag_image* = 22;
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tag_binary* = 23;
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tag_coverpage* = 24;
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tag_description* = 25;
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tag_xml* = 26;
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tag_annotation* = 27;
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tag_contents_item* = 28;
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tag_table* = 29;
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tag_tr* = 30;
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tag_td* = 31;
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tag_th* = 32;
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tag_unknown* = -1;
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TYPE
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ELEMENT* = POINTER TO DESC_ELEMENT;
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TEXT* = POINTER TO DESC_TEXT;
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SPACE* = POINTER TO DESC_SPACE;
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WORD* = POINTER TO DESC_WORD;
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TAG* = POINTER TO DESC_TAG;
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ATTR* = POINTER TO DESC_ATTR;
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TAG_ID = POINTER TO DESC_TAG_ID;
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LIST* = RECORD first*, last* : ELEMENT END;
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DESC_ELEMENT* = RECORD (V.ANYREC)
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parent*, next* : ELEMENT
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END;
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DESC_TEXT = RECORD (DESC_ELEMENT)
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X*, Y* : INTEGER;
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width* : INTEGER
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END;
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DESC_SPACE = RECORD (DESC_TEXT)
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END;
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DESC_WORD = RECORD (DESC_TEXT)
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length* : INTEGER;
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value* : S.CHARS
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END;
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DESC_TAG = RECORD (DESC_ELEMENT)
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name* : S.CHARS;
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value* : INTEGER;
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child* : LIST;
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attr* : LIST;
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Ymin* : INTEGER;
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Ymax* : INTEGER;
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X* : INTEGER;
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Width* : INTEGER;
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Clicked* : BOOLEAN;
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Visited* : BOOLEAN;
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img* : INTEGER;
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num* : INTEGER;
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cell* : INTEGER;
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table* : tables.Table;
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text* : LISTS.ITEM
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END;
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DESC_ATTR = RECORD (DESC_ELEMENT)
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name : S.CHARS;
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value : S.CHARS
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END;
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DESC_TAG_ID = RECORD (DESC_ELEMENT)
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tag : TAG;
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id : S.CHARS
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END;
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VAR
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ch: CHAR; binary: BOOLEAN;
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Root, Current, Header, FB*: ELEMENT;
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Tag_id: LIST;
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tire1, tire2, nbsp, ellipsis, apo,
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quot1, quot2, quot3, quot4, quot5, quot6, quot7,
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number, bullet, euro,
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dash1, dash2: E.tUtf8;
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num: INTEGER;
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Tags: V.VECTOR;
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PROCEDURE GetTagByNum*(n: INTEGER): TAG;
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VAR ptr: V.ANYPTR;
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BEGIN
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ptr := V.get(Tags, n)
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RETURN ptr(TAG)
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END GetTagByNum;
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PROCEDURE ListCount*(list: LIST): INTEGER;
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VAR cur: ELEMENT; res: INTEGER;
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BEGIN
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res := 0;
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cur := list.first;
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WHILE cur # NIL DO
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INC(res);
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cur := cur.next
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END
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RETURN res
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END ListCount;
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PROCEDURE GetTagByID(id: S.CHARS): TAG;
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VAR
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cur : TAG_ID;
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Result : TAG;
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BEGIN
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Result := NIL;
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cur := Tag_id.first(TAG_ID);
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WHILE cur # NIL DO
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IF S.CharsEq(id, cur.id) THEN
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Result := cur.tag;
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cur := NIL
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ELSE
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cur := cur.next(TAG_ID)
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END
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END
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RETURN Result
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END GetTagByID;
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PROCEDURE GetAttr*(tag: TAG; attr_name: S.STRING; VAR attr_value: S.CHARS): BOOLEAN;
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VAR attr: ELEMENT;
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found: BOOLEAN;
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BEGIN
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found := FALSE;
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attr := tag.attr.first;
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WHILE ~found & (attr # NIL) DO
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IF S.CharsEqStr(attr(ATTR).name, attr_name) THEN
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attr_value := attr(ATTR).value;
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INC(attr_value.first);
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DEC(attr_value.last);
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found := TRUE
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ELSE
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attr := attr.next
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END
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END
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RETURN found
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END GetAttr;
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PROCEDURE IsHref(attr_name: S.CHARS): BOOLEAN;
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VAR chars: S.CHARS;
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BEGIN
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chars := attr_name;
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chars.first := chars.last - 4
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RETURN S.CharsEqStr(chars, ":href")
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END IsHref;
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PROCEDURE GetRef*(tag: TAG; VAR note: BOOLEAN; VAR URL: INTEGER): TAG;
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VAR
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attr : ATTR;
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chars : S.CHARS;
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Result : TAG;
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BEGIN
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Result := NIL;
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note := FALSE;
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URL := 0;
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attr := tag.attr.first(ATTR);
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WHILE attr # NIL DO
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IF IsHref(attr.name) THEN
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chars := attr.value;
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INC(chars.first);
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IF S.GetChar(chars, 0) = "#" THEN
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DEC(chars.last);
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INC(chars.first);
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Result := GetTagByID(chars)
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ELSE
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S.PutChar(chars, chars.last - chars.first, 0X);
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URL := chars.first
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END
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ELSIF S.CharsEqStr(attr.name, "type") THEN
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chars := attr.value;
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INC(chars.first);
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DEC(chars.last);
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note := S.CharsEqStr(chars, "note")
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END;
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attr := attr.next(ATTR)
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END
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RETURN Result
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END GetRef;
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PROCEDURE IsNote*(tag: TAG): BOOLEAN;
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VAR
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res : TAG;
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note : BOOLEAN;
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URL : INTEGER;
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BEGIN
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res := GetRef(tag, note, URL)
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RETURN note
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END IsNote;
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PROCEDURE CreateTag*(): TAG;
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VAR tag: TAG;
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BEGIN
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NEW(tag);
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tag.Visited := FALSE;
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SU.MemError(tag = NIL);
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INC(num);
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tag.num := num;
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V.push(Tags, tag)
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RETURN tag
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END CreateTag;
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PROCEDURE CreateWord*(): WORD;
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VAR word: WORD;
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BEGIN
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NEW(word);
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SU.MemError(word = NIL)
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RETURN word
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END CreateWord;
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PROCEDURE CreateSpace(): SPACE;
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VAR space: SPACE;
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BEGIN
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NEW(space);
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SU.MemError(space = NIL)
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RETURN space
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END CreateSpace;
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PROCEDURE CreateAttr(): ATTR;
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VAR attr: ATTR;
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BEGIN
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NEW(attr);
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SU.MemError(attr = NIL)
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RETURN attr
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END CreateAttr;
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PROCEDURE AddItem*(VAR list: LIST; item: ELEMENT);
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BEGIN
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IF list.first = NIL THEN
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list.first := item
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ELSE
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list.last.next := item
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END;
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list.last := item
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END AddItem;
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PROCEDURE DelLastItem*(VAR list: LIST);
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VAR cur: ELEMENT;
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BEGIN
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IF list.first = list.last THEN
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IF list.last # NIL THEN
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DISPOSE(list.last)
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END;
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list.first := NIL
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ELSE
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cur := list.first;
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WHILE cur.next # list.last DO
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cur := cur.next
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END;
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DISPOSE(list.last);
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cur.next := NIL;
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list.last := cur
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END
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END DelLastItem;
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PROCEDURE AddChild*(tag: TAG; child: ELEMENT);
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BEGIN
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AddItem(tag.child, child);
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child.parent := tag
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END AddChild;
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PROCEDURE AddAttr(tag: TAG; attr: ATTR);
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BEGIN
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AddItem(tag.attr, attr);
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attr.parent := tag
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END AddAttr;
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PROCEDURE Copy*(node: ELEMENT): ELEMENT;
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VAR
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space : SPACE;
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word : WORD;
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tag : TAG;
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cur : ELEMENT;
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num : INTEGER;
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Result : ELEMENT;
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BEGIN
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IF node IS TAG THEN
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tag := CreateTag();
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num := tag.num;
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tag^ := node(TAG)^;
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tag.num := num;
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tag.child.first := NIL;
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tag.child.last := NIL;
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cur := node(TAG).child.first;
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WHILE cur # NIL DO
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AddChild(tag, Copy(cur));
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cur := cur.next
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END;
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Result := tag
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ELSIF node IS WORD THEN
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word := CreateWord();
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word^ := node(WORD)^;
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Result := word
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ELSIF node IS SPACE THEN
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space := CreateSpace();
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space^ := node(SPACE)^;
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Result := space
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END;
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Result.next := NIL
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RETURN Result
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END Copy;
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PROCEDURE IsIdentChar(): BOOLEAN;
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RETURN ("A" <= ch) & (ch <= "Z") OR
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("a" <= ch) & (ch <= "z") OR
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("0" <= ch) & (ch <= "9") OR
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(ch = "?") OR (ch = "!") OR
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(ch = ":") OR (ch = "_") OR
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(ch = "-")
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END IsIdentChar;
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PROCEDURE Space(): BOOLEAN;
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RETURN (ch # 0X) & (ch <= 20X)
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END Space;
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PROCEDURE Ident(VAR id: S.CHARS);
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BEGIN
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id.first := RF.Adr();
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WHILE IsIdentChar() DO
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RF.Next(ch)
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END;
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id.last := RF.Adr() - 1
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END Ident;
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PROCEDURE Skip;
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BEGIN
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WHILE Space() DO
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RF.Next(ch)
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END
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END Skip;
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PROCEDURE String(VAR str: S.CHARS);
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VAR quot: CHAR;
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BEGIN
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SU.ErrorIf((ch # "'") & (ch # 22X), 1);
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str.first := RF.Adr();
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quot := ch;
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REPEAT
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RF.Next(ch)
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UNTIL (ch = quot) OR (ch = 0X);
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SU.ErrorIf(ch = 0X, 2);
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str.last := RF.Adr();
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RF.Next(ch)
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END String;
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PROCEDURE SetTagValue(tag: TAG);
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VAR
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value : INTEGER;
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name : S.CHARS;
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BEGIN
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name := tag.name;
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IF S.CharsEqStr(name, "p") THEN
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value := tag_p
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ELSIF S.CharsEqStr(name, "v") THEN
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value := tag_v
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ELSIF S.CharsEqStr(name, "section") THEN
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value := tag_section
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ELSIF S.CharsEqStr(name, "stanza") THEN
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value := tag_stanza
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ELSIF S.CharsEqStr(name, "empty-line") THEN
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value := tag_empty_line
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ELSIF S.CharsEqStr(name, "subtitle") THEN
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value := tag_subtitle
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ELSIF S.CharsEqStr(name, "date") THEN
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value := tag_date
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ELSIF S.CharsEqStr(name, "text-author") THEN
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value := tag_text_author
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ELSIF S.CharsEqStr(name, "a") THEN
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value := tag_a
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ELSIF S.CharsEqStr(name, "sub") THEN
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value := tag_sub
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ELSIF S.CharsEqStr(name, "sup") THEN
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value := tag_sup
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ELSIF S.CharsEqStr(name, "code") THEN
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value := tag_code
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ELSIF S.CharsEqStr(name, "poem") THEN
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value := tag_poem
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ELSIF S.CharsEqStr(name, "title") THEN
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value := tag_title
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ELSIF S.CharsEqStr(name, "FictionBook") THEN
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value := tag_FictionBook;
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FB := tag
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ELSIF S.CharsEqStr(name, "body") THEN
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value := tag_body
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ELSIF S.CharsEqStr(name, "strikethrough") THEN
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value := tag_strikethrough
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ELSIF S.CharsEqStr(name, "strong") THEN
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value := tag_strong
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ELSIF S.CharsEqStr(name, "cite") THEN
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value := tag_cite
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ELSIF S.CharsEqStr(name, "epigraph") THEN
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value := tag_epigraph
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ELSIF S.CharsEqStr(name, "emphasis") THEN
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value := tag_emphasis
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ELSIF S.CharsEqStr(name, "image") THEN
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value := tag_image
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ELSIF S.CharsEqStr(name, "binary") THEN
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binary := TRUE;
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value := tag_binary
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ELSIF S.CharsEqStr(name, "coverpage") THEN
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value := tag_coverpage
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ELSIF S.CharsEqStr(name, "description") THEN
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value := tag_description
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ELSIF S.CharsEqStr(name, "annotation") THEN
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value := tag_annotation
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ELSIF S.CharsEqStr(name, "table") THEN
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value := tag_table
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ELSIF S.CharsEqStr(name, "tr") THEN
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value := tag_tr
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ELSIF S.CharsEqStr(name, "td") THEN
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value := tag_td
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ELSIF S.CharsEqStr(name, "th") THEN
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value := tag_th
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ELSIF S.CharsEqStr(name, "?xml") THEN
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value := tag_xml;
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Header := tag
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ELSE
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value := tag_unknown
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END;
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tag.value := value
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END SetTagValue;
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PROCEDURE ReadTag;
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VAR tag: TAG; name: S.CHARS; attr: ATTR; tag_id: TAG_ID;
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BEGIN
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RF.Next(ch);
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Skip;
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IF ch = "/" THEN
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RF.Next(ch);
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Skip;
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SU.ErrorIf(~IsIdentChar(), 3);
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Ident(name);
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Skip;
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SU.ErrorIf(ch # ">", 4);
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RF.Next(ch);
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tag := Current(TAG);
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SU.ErrorIf(~S.CharsEq(tag.name, name), 5);
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IF tag.value = tag_binary THEN
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binary := FALSE;
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IF tag.child.first IS WORD THEN
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S.Base64(tag.child.first(WORD).value)
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END
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END;
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Current := Current.parent
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ELSE
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tag := CreateTag();
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AddChild(Current(TAG), tag);
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Current := tag;
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SU.ErrorIf(~IsIdentChar(), 6);
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Ident(tag.name);
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SetTagValue(tag);
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WHILE Space() DO
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Skip;
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IF IsIdentChar() THEN
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attr := CreateAttr();
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Ident(attr.name);
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Skip;
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SU.ErrorIf(ch # "=", 7);
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RF.Next(ch);
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Skip;
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String(attr.value);
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AddAttr(Current(TAG), attr);
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IF S.CharsEqStr(attr.name, "id") THEN
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NEW(tag_id);
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SU.MemError(tag_id = NIL);
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tag_id.tag := Current(TAG);
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tag_id.id := attr.value;
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INC(tag_id.id.first);
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DEC(tag_id.id.last);
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AddItem(Tag_id, tag_id)
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END
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END
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END;
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IF ch = "/" THEN
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RF.Next(ch);
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IF Current(TAG).value = tag_binary THEN
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binary := FALSE
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END;
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Current := Current.parent
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ELSIF ch = "?" THEN
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RF.Next(ch);
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SU.ErrorIf(Current(TAG).value # tag_xml, 8);
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Current := Current.parent
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END;
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SU.ErrorIf(ch # ">", 9);
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RF.Next(ch)
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END
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END ReadTag;
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PROCEDURE ReadSpace;
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VAR space: SPACE;
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BEGIN
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space := CreateSpace();
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AddChild(Current(TAG), space);
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RF.Next(ch)
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END ReadSpace;
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PROCEDURE ReadWord;
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VAR word: WORD; chars: S.CHARS; repl: BOOLEAN;
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|
BEGIN
|
|
word := CreateWord();
|
|
word.value.first := RF.Adr();
|
|
repl := FALSE;
|
|
WHILE ((ch > 20X) OR binary) & (ch # 0X) & (ch # "<") DO
|
|
repl := repl OR (ch = "&") OR (ch = 0C2X) OR (ch >= 0E0X) & (ch < 0F0X);
|
|
RF.Next(ch)
|
|
END;
|
|
word.value.last := RF.Adr() - 1;
|
|
IF repl THEN
|
|
chars := word.value;
|
|
S.Replace(chars, "&", "&");
|
|
S.Replace(chars, "<", "<");
|
|
S.Replace(chars, ">", ">");
|
|
S.Replace(chars, """, 22X);
|
|
S.Replace(chars, "'", "'");
|
|
WHILE S.EntOct(chars) DO END;
|
|
S.Replace(chars, tire1, "--");
|
|
S.Replace(chars, tire2, "--");
|
|
S.Replace(chars, nbsp, " ");
|
|
S.Replace(chars, ellipsis, "...");
|
|
S.Replace(chars, quot1, 22X);
|
|
S.Replace(chars, quot2, 22X);
|
|
S.Replace(chars, quot3, 22X);
|
|
S.Replace(chars, quot4, "'");
|
|
S.Replace(chars, quot5, ",");
|
|
S.Replace(chars, quot6, "<");
|
|
S.Replace(chars, quot7, ">");
|
|
S.Replace(chars, number, "No.");
|
|
S.Replace(chars, apo, "'");
|
|
S.Replace(chars, dash1, "-");
|
|
S.Replace(chars, dash2, "-");
|
|
S.Replace(chars, bullet, "*");
|
|
S.Replace(chars, euro, "EUR");
|
|
word.value := chars
|
|
END;
|
|
AddChild(Current(TAG), word)
|
|
END ReadWord;
|
|
|
|
|
|
PROCEDURE Comment(): BOOLEAN;
|
|
CONST com = 2D2D213CH;
|
|
VAR res: BOOLEAN;
|
|
BEGIN
|
|
res := FALSE;
|
|
IF RF.Int() = com THEN
|
|
RF.Next(ch);
|
|
RF.Next(ch);
|
|
RF.Next(ch);
|
|
RF.Next(ch);
|
|
|
|
REPEAT
|
|
RF.Next(ch);
|
|
IF ch = "-" THEN
|
|
RF.Next(ch);
|
|
WHILE (ch = "-") & ~res DO
|
|
RF.Next(ch);
|
|
IF ch = ">" THEN
|
|
RF.Next(ch);
|
|
res := TRUE
|
|
END
|
|
END
|
|
END
|
|
UNTIL (ch = 0X) OR res
|
|
|
|
END
|
|
RETURN res
|
|
END Comment;
|
|
|
|
|
|
PROCEDURE Prolog;
|
|
VAR attr: ATTR; chars: S.CHARS;
|
|
BEGIN
|
|
RF.Next(ch);
|
|
IF ch = 0EFX THEN
|
|
RF.Next(ch);
|
|
SU.ErrorIf(ch # 0BBX, 16);
|
|
RF.Next(ch);
|
|
SU.ErrorIf(ch # 0BFX, 16);
|
|
RF.Next(ch)
|
|
END;
|
|
Skip;
|
|
IF ch = "<" THEN
|
|
ReadTag
|
|
END;
|
|
|
|
SU.ErrorIf(Header = NIL, 15);
|
|
|
|
attr := Header(TAG).attr.first(ATTR);
|
|
WHILE attr # NIL DO
|
|
IF S.CharsEqStr(attr.name, "encoding") THEN
|
|
chars := attr.value;
|
|
INC(chars.first);
|
|
DEC(chars.last);
|
|
S.SetCS(FALSE);
|
|
IF S.CharsEqStr(chars, "windows-1250") THEN
|
|
RF.Conv(E.cp1250)
|
|
ELSIF S.CharsEqStr(chars, "windows-1251") THEN
|
|
RF.Conv(E.cp1251)
|
|
ELSIF S.CharsEqStr(chars, "windows-1252") THEN
|
|
RF.Conv(E.cp1252)
|
|
ELSIF S.CharsEqStr(chars, "cp866" ) THEN
|
|
RF.Conv(E.cp866)
|
|
ELSIF S.CharsEqStr(chars, "utf-8" ) THEN
|
|
RF.SeekBeg
|
|
ELSE
|
|
SU.ErrorIf(TRUE, 14)
|
|
END;
|
|
S.SetCS(TRUE)
|
|
END;
|
|
attr := attr.next(ATTR)
|
|
END
|
|
END Prolog;
|
|
|
|
|
|
PROCEDURE Parse;
|
|
BEGIN
|
|
Prolog;
|
|
binary := FALSE;
|
|
RF.Next(ch);
|
|
WHILE ch = "<" DO
|
|
IF ~Comment() THEN
|
|
ReadTag
|
|
END
|
|
ELSIF Space() & ~binary DO
|
|
ReadSpace
|
|
ELSIF (ch # 0X) DO
|
|
ReadWord
|
|
END
|
|
END Parse;
|
|
|
|
|
|
PROCEDURE Open*(FileName: S.STRING);
|
|
BEGIN
|
|
Root := CreateTag();
|
|
Current := Root;
|
|
Header := NIL;
|
|
FB := NIL;
|
|
num := 0;
|
|
RF.Load(FileName);
|
|
Parse;
|
|
SU.ErrorIf(Current # Root, 10)
|
|
END Open;
|
|
|
|
|
|
PROCEDURE Init;
|
|
BEGIN
|
|
E.utf8(8212, tire1);
|
|
E.utf8(8211, tire2);
|
|
E.utf8( 160, nbsp);
|
|
E.utf8(8230, ellipsis);
|
|
E.utf8(8217, apo);
|
|
E.utf8(8220, quot1);
|
|
E.utf8(8221, quot2);
|
|
E.utf8(8222, quot3);
|
|
E.utf8(8216, quot4);
|
|
E.utf8(8218, quot5);
|
|
E.utf8(8249, quot6);
|
|
E.utf8(8250, quot7);
|
|
E.utf8(8470, number);
|
|
E.utf8(8208, dash1);
|
|
E.utf8(8209, dash2);
|
|
E.utf8(8226, bullet);
|
|
E.utf8(8364, euro);
|
|
Tags := V.create(1024)
|
|
END Init;
|
|
|
|
|
|
BEGIN
|
|
Init
|
|
END XML.
|