EControl Syntax Editor SDK
Common for Styles and Rules

Hierarchy of style and rules objects



Working with list of TSyntCollectionItem


All styles and rules is items derived from TSyntCollectionItem of corresponding collections, so working with list is common for them.

Each item in list have unique name and index.
Edit box under list allows to change name of the item.
You can use drag&drop operations to change order of items.

You can disable any item. Disabled items displayed with gray color. Disabled items will not be used in syntax analysis algorithm (rules) or will not be applied to the editor canvas (styles).


  1. Move item up one step
  2. Move item down one step
  3. Create new item
  4. Import items from other lexer. Open "Import Styles/Rules" dialog
  5. Disable/enable item
  6. Delete item
  7. Delete all items



Parent restrictions for rules (TRuleCollectionItem)

All rule classes are derived from TRuleCollectionItem. In this class special conditions for rule enabling are defined. 

You can enable rule only within (out) some block. 


Parent block - block rule of opened text range (when rule is being checked) that is verified for presence. 

Strict parent block - flag that specifies that parent block must be immediate parent for th rule. 

Not a parent - flag that specifies that "parent block" is not a parent of the rule. 




const y: integer = 5;

function A;
var x: integer;
case B of
0: begin
x := y;
start of "implementation" range

token detection for "const"

start of "function" range
token detection for "var"
start of "begin" range
start of "case" range
start of "begin" range (second)

end of "begin" range (second)
end of "case" range
end of "begin" range, end of "function" range 


For the detection "var" range "implementation" is a parent, but not a strict parent, range "function" is parent and strict parent. 

For "function" range detecting you can specify parent "implementation". If you set strict parent flag, nested functions will not be detected. Such restrictions will work only in units (where "implementation" section is present). Or you may specify that "function" range have not a "interface" parent (set flag "not a parent") in this case function will be detected not only in units but in program file or in scripts. 


Always enabled - flag that specifies that this rule will be active not only in the current lexer but in the nested lexers too. 

For example, in pascal function we have "asm" range with reference to nested "Assembler" lexer. We can specify that "comment" token rule is always enabled. In this case in the assembler block pascal comments will be highlighted correctly, otherwise this rule will be inaccessible in assembler block. 


Style - reference to style item that is associated with the rule. Style affects differently for each type of rules, so it will be described below. 

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