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DML related refactoring

This commit is contained in:
Vadim Lopatin 2015-04-07 12:07:21 +03:00
parent 3eaea625d7
commit e592462f6b
5 changed files with 1542 additions and 0 deletions
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1
dlanguilib.visualdproj
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@ -386,6 +386,7 @@
<File path="src\dlangui\dialogs\settingsdialog.d" /> <File path="src\dlangui\dialogs\settingsdialog.d" />
</Folder> </Folder>
<Folder name="dml"> <Folder name="dml">
<File path="src\dlangui\dml\annotations.d" />
<File path="src\dlangui\dml\dmlhighlight.d" /> <File path="src\dlangui\dml\dmlhighlight.d" />
<File path="src\dlangui\dml\parser.d" /> <File path="src\dlangui\dml\parser.d" />
</Folder> </Folder>

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src/dlangui/dml/annotations.d Normal file
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module dlangui.dml.annotations;
/// annotate widget with @dmlwidget UDA to allow using it in DML
struct dmlwidget {
bool dummy;
}
/// annotate widget property with @dmlproperty UDA to allow using it in DML
struct dmlproperty {
bool dummy;
}
/// annotate signal with @dmlsignal UDA
struct dmlsignal {
bool dummy;
}

669
src/dlangui/dml/dmlhighlight.d Normal file
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module dlangui.dml.dmlhighlight;
import dlangui.core.editable;
import dlangui.core.linestream;
import dlangui.core.textsource;
import dlangui.core.logger;
import dlangui.dml.parser;
import dlangui.widgets.metadata;
class DMLSyntaxSupport : SyntaxSupport {
EditableContent _content;
SourceFile _file;
this (string filename) {
_file = new SourceFile(filename);
}
TokenPropString[] _props;
/// returns editable content
@property EditableContent content() { return _content; }
/// set editable content
@property SyntaxSupport content(EditableContent content) {
_content = content;
return this;
}
private enum BracketMatch {
CONTINUE,
FOUND,
ERROR
}
private static struct BracketStack {
dchar[] buf;
int pos;
bool reverse;
void init(bool reverse) {
this.reverse = reverse;
pos = 0;
}
void push(dchar ch) {
if (buf.length <= pos)
buf.length = pos + 16;
buf[pos++] = ch;
}
dchar pop() {
if (pos <= 0)
return 0;
return buf[--pos];
}
BracketMatch process(dchar ch) {
if (reverse) {
if (isCloseBracket(ch)) {
push(ch);
return BracketMatch.CONTINUE;
} else {
if (pop() != pairedBracket(ch))
return BracketMatch.ERROR;
if (pos == 0)
return BracketMatch.FOUND;
return BracketMatch.CONTINUE;
}
} else {
if (isOpenBracket(ch)) {
push(ch);
return BracketMatch.CONTINUE;
} else {
if (pop() != pairedBracket(ch))
return BracketMatch.ERROR;
if (pos == 0)
return BracketMatch.FOUND;
return BracketMatch.CONTINUE;
}
}
}
}
BracketStack _bracketStack;
static bool isBracket(dchar ch) {
return pairedBracket(ch) != 0;
}
static dchar pairedBracket(dchar ch) {
switch (ch) {
case '(':
return ')';
case ')':
return '(';
case '{':
return '}';
case '}':
return '{';
case '[':
return ']';
case ']':
return '[';
default:
return 0; // not a bracket
}
}
static bool isOpenBracket(dchar ch) {
switch (ch) {
case '(':
case '{':
case '[':
return true;
default:
return false;
}
}
static bool isCloseBracket(dchar ch) {
switch (ch) {
case ')':
case '}':
case ']':
return true;
default:
return false;
}
}
protected dchar nextBracket(int dir, ref TextPosition p) {
for (;;) {
TextPosition oldpos = p;
p = dir < 0 ? _content.prevCharPos(p) : _content.nextCharPos(p);
if (p == oldpos)
return 0;
auto prop = _content.tokenProp(p);
if (tokenCategory(prop) == TokenCategory.Op) {
dchar ch = _content[p];
if (isBracket(ch))
return ch;
}
}
}
/// returns paired bracket {} () [] for char at position p, returns paired char position or p if not found or not bracket
override TextPosition findPairedBracket(TextPosition p) {
if (p.line < 0 || p.line >= content.length)
return p;
dstring s = content.line(p.line);
if (p.pos < 0 || p.pos >= s.length)
return p;
dchar ch = content[p];
dchar paired = pairedBracket(ch);
if (!paired)
return p;
TextPosition startPos = p;
int dir = isOpenBracket(ch) ? 1 : -1;
_bracketStack.init(dir < 0);
_bracketStack.process(ch);
for (;;) {
ch = nextBracket(dir, p);
if (!ch) // no more brackets
return startPos;
auto match = _bracketStack.process(ch);
if (match == BracketMatch.FOUND)
return p;
if (match == BracketMatch.ERROR)
return startPos;
// continue
}
}
/// return true if toggle line comment is supported for file type
override @property bool supportsToggleLineComment() {
return true;
}
/// return true if can toggle line comments for specified text range
override bool canToggleLineComment(TextRange range) {
TextRange r = content.fullLinesRange(range);
if (isInsideBlockComment(r.start) || isInsideBlockComment(r.end))
return false;
return true;
}
protected bool isLineComment(dstring s) {
for (int i = 0; i < cast(int)s.length - 1; i++) {
if (s[i] == '/' && s[i + 1] == '/')
return true;
else if (s[i] != ' ' && s[i] != '\t')
return false;
}
return false;
}
protected dstring commentLine(dstring s, int commentX) {
dchar[] res;
int x = 0;
bool commented = false;
for (int i = 0; i < s.length; i++) {
dchar ch = s[i];
if (ch == '\t') {
int newX = (x + _content.tabSize) / _content.tabSize * _content.tabSize;
if (!commented && newX >= commentX) {
commented = true;
if (newX != commentX) {
// replace tab with space
for (; x <= commentX; x++)
res ~= ' ';
} else {
res ~= ch;
x = newX;
}
res ~= "//"d;
x += 2;
} else {
res ~= ch;
x = newX;
}
} else {
if (!commented && x == commentX) {
commented = true;
res ~= "//"d;
res ~= ch;
x += 3;
} else {
res ~= ch;
x++;
}
}
}
if (!commented) {
for (; x < commentX; x++)
res ~= ' ';
res ~= "//"d;
}
return cast(dstring)res;
}
/// remove single line comment from beginning of line
protected dstring uncommentLine(dstring s) {
int p = -1;
for (int i = 0; i < cast(int)s.length - 1; i++) {
if (s[i] == '/' && s[i + 1] == '/') {
p = i;
break;
}
}
if (p < 0)
return s;
s = s[0..p] ~ s[p + 2 .. $];
for (int i = 0; i < s.length; i++) {
if (s[i] != ' ' && s[i] != '\t') {
return s;
}
}
return null;
}
/// searches for neares token start before or equal to position
protected TextPosition tokenStart(TextPosition pos) {
TextPosition p = pos;
for (;;) {
TextPosition prevPos = content.prevCharPos(p);
if (p == prevPos)
return p; // begin of file
TokenProp prop = content.tokenProp(p);
TokenProp prevProp = content.tokenProp(prevPos);
if (prop && prop != prevProp)
return p;
p = prevPos;
}
}
static struct TokenWithRange {
Token token;
TextRange range;
@property string toString() {
return token.toString ~ range.toString;
}
}
protected Token[] _tokens;
protected int _tokenIndex;
protected bool initTokenizer() {
_tokens = tokenizeML(content.lines);
_tokenIndex = 0;
return true;
}
protected TokenWithRange nextToken() {
TokenWithRange res;
if (_tokenIndex < _tokens.length) {
res.range.start = TextPosition(_tokens[_tokenIndex].line, _tokens[_tokenIndex].pos);
if (_tokenIndex + 1 < _tokens.length)
res.range.end = TextPosition(_tokens[_tokenIndex + 1].line, _tokens[_tokenIndex + 1].pos);
else
res.range.end = content.endOfFile();
res.token = _tokens[_tokenIndex];
_tokenIndex++;
} else {
res.range.end = res.range.start = content.endOfFile();
}
return res;
}
protected TokenWithRange getPositionToken(TextPosition pos) {
initTokenizer();
for (;;) {
TokenWithRange tokenRange = nextToken();
//Log.d("read token: ", tokenRange);
if (tokenRange.token.type == TokenType.eof) {
//Log.d("end of file");
return tokenRange;
}
if (pos >= tokenRange.range.start && pos < tokenRange.range.end) {
//Log.d("found: ", pos, " in ", tokenRange);
return tokenRange;
}
}
}
protected TokenWithRange[] getRangeTokens(TextRange range) {
TokenWithRange[] res;
initTokenizer();
for (;;) {
TokenWithRange tokenRange = nextToken();
//Log.d("read token: ", tokenRange);
if (tokenRange.token.type == TokenType.eof) {
return res;
}
if (tokenRange.range.intersects(range)) {
//Log.d("found: ", pos, " in ", tokenRange);
res ~= tokenRange;
}
}
}
protected bool isInsideBlockComment(TextPosition pos) {
TokenWithRange tokenRange = getPositionToken(pos);
if (tokenRange.token.type == TokenType.comment && tokenRange.token.isMultilineComment)
return pos > tokenRange.range.start && pos < tokenRange.range.end;
return false;
}
/// toggle line comments for specified text range
override void toggleLineComment(TextRange range, Object source) {
TextRange r = content.fullLinesRange(range);
if (isInsideBlockComment(r.start) || isInsideBlockComment(r.end))
return;
int lineCount = r.end.line - r.start.line;
bool noEolAtEndOfRange = false;
if (lineCount == 0 || r.end.pos > 0) {
noEolAtEndOfRange = true;
lineCount++;
}
int minLeftX = -1;
bool hasComments = false;
bool hasNoComments = false;
bool hasNonEmpty = false;
dstring[] srctext;
dstring[] dsttext;
for (int i = 0; i < lineCount; i++) {
int lineIndex = r.start.line + i;
dstring s = content.line(lineIndex);
srctext ~= s;
TextLineMeasure m = content.measureLine(lineIndex);
if (!m.empty) {
if (minLeftX < 0 || minLeftX > m.firstNonSpaceX)
minLeftX = m.firstNonSpaceX;
hasNonEmpty = true;
if (isLineComment(s))
hasComments = true;
else
hasNoComments = true;
}
}
if (minLeftX < 0)
minLeftX = 0;
if (hasNoComments || !hasComments) {
// comment
for (int i = 0; i < lineCount; i++) {
dsttext ~= commentLine(srctext[i], minLeftX);
}
if (!noEolAtEndOfRange)
dsttext ~= ""d;
EditOperation op = new EditOperation(EditAction.Replace, r, dsttext);
_content.performOperation(op, source);
} else {
// uncomment
for (int i = 0; i < lineCount; i++) {
dsttext ~= uncommentLine(srctext[i]);
}
if (!noEolAtEndOfRange)
dsttext ~= ""d;
EditOperation op = new EditOperation(EditAction.Replace, r, dsttext);
_content.performOperation(op, source);
}
}
/// return true if toggle block comment is supported for file type
override @property bool supportsToggleBlockComment() {
return true;
}
/// return true if can toggle block comments for specified text range
override bool canToggleBlockComment(TextRange range) {
TokenWithRange startToken = getPositionToken(range.start);
TokenWithRange endToken = getPositionToken(range.end);
//Log.d("canToggleBlockComment: startToken=", startToken, " endToken=", endToken);
if (startToken.range == endToken.range && startToken.token.isMultilineComment) {
//Log.d("canToggleBlockComment: can uncomment");
return true;
}
if (range.empty)
return false;
TokenWithRange[] tokens = getRangeTokens(range);
foreach(ref t; tokens) {
if (t.token.type == TokenType.comment) {
if (t.token.isMultilineComment) {
// disable until nested comments support is implemented
return false;
} else {
// single line comment
if (t.range.isInside(range.start) || t.range.isInside(range.end))
return false;
}
}
}
return true;
}
/// toggle block comments for specified text range
override void toggleBlockComment(TextRange srcrange, Object source) {
TokenWithRange startToken = getPositionToken(srcrange.start);
TokenWithRange endToken = getPositionToken(srcrange.end);
if (startToken.range == endToken.range && startToken.token.isMultilineComment) {
TextRange range = startToken.range;
dstring[] dsttext;
for (int i = range.start.line; i <= range.end.line; i++) {
dstring s = content.line(i);
int charsRemoved = 0;
int minp = 0;
if (i == range.start.line) {
int maxp = content.lineLength(range.start.line);
if (i == range.end.line)
maxp = range.end.pos - 2;
charsRemoved = 2;
for (int j = range.start.pos + charsRemoved; j < maxp; j++) {
if (s[j] != s[j - 1])
break;
charsRemoved++;
}
//Log.d("line before removing start of comment:", s);
s = s[range.start.pos + charsRemoved .. $];
//Log.d("line after removing start of comment:", s);
charsRemoved += range.start.pos;
}
if (i == range.end.line) {
int endp = range.end.pos;
if (charsRemoved > 0)
endp -= charsRemoved;
int endRemoved = 2;
for (int j = endp - endRemoved; j >= 0; j--) {
if (s[j] != s[j + 1])
break;
endRemoved++;
}
//Log.d("line before removing end of comment:", s);
s = s[0 .. endp - endRemoved];
//Log.d("line after removing end of comment:", s);
}
dsttext ~= s;
}
EditOperation op = new EditOperation(EditAction.Replace, range, dsttext);
_content.performOperation(op, source);
return;
} else {
if (srcrange.empty)
return;
TokenWithRange[] tokens = getRangeTokens(srcrange);
foreach(ref t; tokens) {
if (t.token.type == TokenType.comment) {
if (t.token.isMultilineComment) {
// disable until nested comments support is implemented
return;
} else {
// single line comment
if (t.range.isInside(srcrange.start) || t.range.isInside(srcrange.end))
return;
}
}
}
dstring[] dsttext;
for (int i = srcrange.start.line; i <= srcrange.end.line; i++) {
dstring s = content.line(i);
int charsAdded = 0;
if (i == srcrange.start.line) {
int p = srcrange.start.pos;
if (p < s.length) {
s = s[p .. $];
charsAdded = -p;
} else {
charsAdded = -(cast(int)s.length);
s = null;
}
s = "/*" ~ s;
charsAdded += 2;
}
if (i == srcrange.end.line) {
int p = srcrange.end.pos + charsAdded;
s = p > 0 ? s[0..p] : null;
s ~= "*/";
}
dsttext ~= s;
}
EditOperation op = new EditOperation(EditAction.Replace, srcrange, dsttext);
_content.performOperation(op, source);
return;
}
}
/// categorize characters in content by token types
void updateHighlight(dstring[] lines, TokenPropString[] props, int changeStartLine, int changeEndLine) {
initTokenizer();
_props = props;
changeStartLine = 0;
changeEndLine = cast(int)lines.length;
int tokenPos = 0;
int tokenLine = 0;
ubyte category = 0;
try {
for (;;) {
TokenWithRange token = nextToken();
if (token.token.type == TokenType.eof) {
break;
}
uint newPos = token.range.start.pos;
uint newLine = token.range.start.line;
// fill with category
for (int i = tokenLine; i <= newLine; i++) {
int start = i > tokenLine ? 0 : tokenPos;
int end = i < newLine ? cast(int)lines[i].length : newPos;
for (int j = start; j < end; j++) {
if (j < _props[i].length) {
_props[i][j] = category;
}
}
}
// handle token - convert to category
switch(token.token.type) {
case TokenType.comment:
category = TokenCategory.Comment;
break;
case TokenType.ident:
if (isWidgetClassName(token.token.text))
category = TokenCategory.Identifier_Class;
else
category = TokenCategory.Identifier;
break;
case TokenType.str:
category = TokenCategory.String;
break;
case TokenType.integer:
category = TokenCategory.Integer;
break;
case TokenType.floating:
category = TokenCategory.Float;
break;
case TokenType.error:
category = TokenCategory.Error;
break;
default:
if (token.token.type >= TokenType.colon)
category = TokenCategory.Op;
else
category = 0;
break;
}
tokenPos = newPos;
tokenLine= newLine;
}
} catch (Exception e) {
Log.e("exception while trying to parse DML source", e);
}
_props = null;
}
/// returns true if smart indent is supported
override bool supportsSmartIndents() {
return true;
}
protected bool _opInProgress;
protected void applyNewLineSmartIndent(EditOperation op, Object source) {
int line = op.newRange.end.line;
if (line == 0)
return; // not for first line
int prevLine = line - 1;
dstring lineText = _content.line(line);
TextLineMeasure lineMeasurement = _content.measureLine(line);
TextLineMeasure prevLineMeasurement = _content.measureLine(prevLine);
while (prevLineMeasurement.empty && prevLine > 0) {
prevLine--;
prevLineMeasurement = _content.measureLine(prevLine);
}
if (lineMeasurement.firstNonSpaceX >= 0 && lineMeasurement.firstNonSpaceX < prevLineMeasurement.firstNonSpaceX) {
dstring prevLineText = _content.line(prevLine);
TokenPropString prevLineTokenProps = _content.lineTokenProps(prevLine);
dchar lastOpChar = 0;
for (int j = prevLineMeasurement.lastNonSpace; j >= 0; j--) {
auto cat = j < prevLineTokenProps.length ? tokenCategory(prevLineTokenProps[j]) : 0;
if (cat == TokenCategory.Op) {
lastOpChar = prevLineText[j];
break;
} else if (cat != TokenCategory.Comment && cat != TokenCategory.WhiteSpace) {
break;
}
}
int spacex = prevLineMeasurement.firstNonSpaceX;
if (lastOpChar == '{')
spacex = _content.nextTab(spacex);
dstring txt = _content.fillSpace(spacex);
EditOperation op2 = new EditOperation(EditAction.Replace, TextRange(TextPosition(line, 0), TextPosition(line, lineMeasurement.firstNonSpace >= 0 ? lineMeasurement.firstNonSpace : 0)), [txt]);
_opInProgress = true;
_content.performOperation(op2, source);
_opInProgress = false;
}
}
protected void applyClosingCurlySmartIndent(EditOperation op, Object source) {
int line = op.newRange.end.line;
TextPosition p2 = findPairedBracket(op.newRange.start);
if (p2 == op.newRange.start || p2.line > op.newRange.start.line)
return;
int prevLine = p2.line;
TextLineMeasure lineMeasurement = _content.measureLine(line);
TextLineMeasure prevLineMeasurement = _content.measureLine(prevLine);
if (lineMeasurement.firstNonSpace != op.newRange.start.pos)
return; // not in beginning of line
if (lineMeasurement.firstNonSpaceX >= 0 && lineMeasurement.firstNonSpaceX != prevLineMeasurement.firstNonSpaceX) {
dstring prevLineText = _content.line(prevLine);
TokenPropString prevLineTokenProps = _content.lineTokenProps(prevLine);
int spacex = prevLineMeasurement.firstNonSpaceX;
if (spacex != lineMeasurement.firstNonSpaceX) {
dstring txt = _content.fillSpace(spacex);
txt = txt ~ "}";
EditOperation op2 = new EditOperation(EditAction.Replace, TextRange(TextPosition(line, 0), TextPosition(line, lineMeasurement.firstNonSpace >= 0 ? lineMeasurement.firstNonSpace + 1 : 0)), [txt]);
_opInProgress = true;
_content.performOperation(op2, source);
_opInProgress = false;
}
}
}
/// apply smart indent, if supported
override void applySmartIndent(EditOperation op, Object source) {
if (_opInProgress)
return;
if (op.isInsertNewLine) {
// Enter key pressed - new line inserted or splitted
applyNewLineSmartIndent(op, source);
} else if (op.singleChar == '}') {
// } entered - probably need unindent
applyClosingCurlySmartIndent(op, source);
} else if (op.singleChar == '{') {
// { entered - probably need auto closing }
}
}
}

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src/dlangui/dml/parser.d Normal file
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// Written in the D programming language.
/**
This module is DML (DlangUI Markup Language) parser - similar to QML in QtQuick
Synopsis:
----
Widget layout = parseML(q{
VerticalLayout {
TextWidget { text: "Some label" }
TextLine { id: editor; text: "Some text to edit" }
Button { id: btnOk; text: "Ok" }
}
}
----
Copyright: Vadim Lopatin, 2015
License: Boost License 1.0
Authors: Vadim Lopatin, coolreader.org@gmail.com
*/
module dlangui.dml.parser;
import dlangui.core.linestream;
import dlangui.core.collections;
import dlangui.core.types;
import dlangui.widgets.widget;
import dlangui.widgets.metadata;
import std.conv : to;
import std.algorithm : equal, min, max;
import std.utf : toUTF32, toUTF8;
import std.array : join;
public import dlangui.dml.annotations;
class ParserException : Exception {
protected string _msg;
protected string _file;
protected int _line;
protected int _pos;
@property string file() { return _file; }
@property string msg() { return _msg; }
@property int line() { return _line; }
@property int pos() { return _pos; }
this(string msg, string file, int line, int pos) {
super(msg ~ " at " ~ file ~ " line " ~ to!string(line) ~ " column " ~ to!string(pos));
_msg = msg;
_file = file;
_line = line;
_pos = pos;
}
}
/// parser exception - unknown (unregistered) widget name
class UnknownWidgetException : ParserException {
protected string _objectName;
@property string objectName() { return _objectName; }
this(string msg, string objectName, string file, int line, int pos) {
super(msg is null ? "Unknown widget name: " ~ objectName : msg, file, line, pos);
_objectName = objectName;
}
}
/// parser exception - unknown property for widget
class UnknownPropertyException : UnknownWidgetException {
protected string _propName;
@property string propName() { return _propName; }
this(string msg, string objectName, string propName, string file, int line, int pos) {
super(msg is null ? "Unknown property " ~ objectName ~ "." ~ propName : msg, objectName, file, line, pos);
}
}
enum TokenType : ushort {
/// end of file
eof,
/// end of line
eol,
/// whitespace
whitespace,
/// string literal
str,
/// integer literal
integer,
/// floating point literal
floating,
/// comment
comment,
/// ident
ident,
/// error
error,
// operators
/// : operator
colon,
/// . operator
dot,
/// ; operator
semicolon,
/// , operator
comma,
/// - operator
minus,
/// + operator
plus,
/// [
curlyOpen,
/// ]
curlyClose,
/// (
open,
/// )
close,
/// [
squareOpen,
/// ]
squareClose,
}
struct Token {
TokenType type;
ushort line;
ushort pos;
bool multiline;
string text;
union {
int intvalue;
double floatvalue;
}
public @property string toString() {
if (type == TokenType.integer)
return "" ~ to!string(line) ~ ":" ~ to!string(pos) ~ " " ~ to!string(type) ~ " " ~ to!string(intvalue);
else if (type == TokenType.floating)
return "" ~ to!string(line) ~ ":" ~ to!string(pos) ~ " " ~ to!string(type) ~ " " ~ to!string(floatvalue);
else
return "" ~ to!string(line) ~ ":" ~ to!string(pos) ~ " " ~ to!string(type) ~ " \"" ~ text ~ "\"";
}
@property bool isMultilineComment() {
return type == TokenType.comment && multiline;
}
}
/// simple tokenizer for DlangUI ML
class Tokenizer {
protected LineStream _lines;
dchar[] _lineText;
ushort _line;
ushort _pos;
int _len;
dchar _prevChar;
string _filename;
Token _token;
enum : int {
EOF_CHAR = 0x001A,
EOL_CHAR = 0x000A
};
this(string source, string filename = "") {
_filename = filename;
_lines = LineStream.create(source, filename);
_lineText = _lines.readLine();
_len = cast(int)_lineText.length;
_line = 0;
_pos = 0;
_prevChar = 0;
}
~this() {
destroy(_lines);
_lines = null;
}
protected dchar peekChar() {
if (_pos < _len)
return _lineText[_pos];
else if (_lineText is null)
return EOF_CHAR;
return EOL_CHAR;
}
protected dchar peekNextChar() {
if (_pos < _len - 1)
return _lineText[_pos + 1];
else if (_lineText is null)
return EOF_CHAR;
return EOL_CHAR;
}
protected dchar nextChar() {
if (_pos < _len)
_prevChar = _lineText[_pos++];
else if (_lineText is null)
_prevChar = EOF_CHAR;
else {
_lineText = _lines.readLine();
_len = cast(int)_lineText.length;
_line++;
_pos = 0;
_prevChar = EOL_CHAR;
}
return _prevChar;
}
protected dchar skipChar() {
nextChar();
return peekChar();
}
protected void setTokenStart() {
_token.pos = _pos;
_token.line = _line;
_token.text = null;
_token.intvalue = 0;
}
protected ref const(Token) parseEof() {
_token.type = TokenType.eof;
return _token;
}
protected ref const(Token) parseEol() {
_token.type = TokenType.eol;
nextChar();
return _token;
}
protected ref const(Token) parseWhiteSpace() {
_token.type = TokenType.whitespace;
for(;;) {
dchar ch = skipChar();
if (ch != ' ' && ch != '\t')
break;
}
return _token;
}
static bool isAlpha(dchar ch) {
return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || ch == '_';
}
static bool isNum(dchar ch) {
return (ch >= '0' && ch <= '9');
}
static bool isAlphaNum(dchar ch) {
return isNum(ch) || isAlpha(ch);
}
private char[] _stringbuf;
protected ref const(Token) parseString() {
_token.type = TokenType.str;
//skipChar(); // skip "
bool lastBackslash = false;
_stringbuf.length = 0;
for(;;) {
dchar ch = skipChar();
if (ch == '\"') {
if (lastBackslash) {
_stringbuf ~= ch;
lastBackslash = false;
} else {
skipChar();
break;
}
} else if (ch == '\\') {
if (lastBackslash) {
_stringbuf ~= ch;
lastBackslash = false;
} else {
lastBackslash = true;
}
} else if (ch == EOL_CHAR) {
skipChar();
break;
} else if (lastBackslash) {
if (ch == 'n')
ch = '\n';
else if (ch == 't')
ch = '\t';
_stringbuf ~= ch;
lastBackslash = false;
} else {
_stringbuf ~= ch;
lastBackslash = false;
}
}
_token.text = _stringbuf.dup;
return _token;
}
protected ref const(Token) parseIdent() {
_token.type = TokenType.ident;
_stringbuf.length = 0;
_stringbuf ~= peekChar();
for(;;) {
dchar ch = skipChar();
if (!isAlphaNum(ch))
break;
_stringbuf ~= ch;
}
_token.text = _stringbuf.dup;
return _token;
}
protected ref const(Token) parseFloating(int n) {
_token.type = TokenType.floating;
dchar ch = peekChar();
// floating point
int div = 0;
int n2 = 0;
for (;;) {
ch = skipChar();
if (!isNum(ch))
break;
n2 = n2 * 10 + (ch - '0');
div++;
}
_token.floatvalue = cast(double)n + (div > 0 ? cast(double)n2 / div : 0.0);
string suffix;
if (ch == '%') {
suffix ~= ch;
ch = skipChar();
} else {
while (ch >= 'a' && ch <= 'z') {
suffix ~= ch;
ch = skipChar();
}
}
if (isAlphaNum(ch) || ch == '.')
return parseError();
_token.text = suffix;
return _token;
}
protected ref const(Token) parseNumber() {
dchar ch = peekChar();
uint n = ch - '0';
for(;;) {
ch = skipChar();
if (!isNum(ch))
break;
n = n * 10 + (ch - '0');
}
if (ch == '.')
return parseFloating(n);
string suffix;
if (ch == '%') {
suffix ~= ch;
ch = skipChar();
} else {
while (ch >= 'a' && ch <= 'z') {
suffix ~= ch;
ch = skipChar();
}
}
if (isAlphaNum(ch) || ch == '.')
return parseError();
_token.type = TokenType.integer;
_token.intvalue = n;
_token.text = suffix;
return _token;
}
protected ref const(Token) parseSingleLineComment() {
for(;;) {
dchar ch = skipChar();
if (ch == EOL_CHAR || ch == EOF_CHAR)
break;
}
_token.type = TokenType.comment;
_token.multiline = false;
return _token;
}
protected ref const(Token) parseMultiLineComment() {
skipChar();
for(;;) {
dchar ch = skipChar();
if (ch == '*' && peekNextChar() == '/') {
skipChar();
skipChar();
break;
}
if (ch == EOF_CHAR)
break;
}
_token.type = TokenType.comment;
_token.multiline = true;
return _token;
}
protected ref const(Token) parseError() {
_token.type = TokenType.error;
for(;;) {
dchar ch = skipChar();
if (ch == ' ' || ch == '\t' || ch == EOL_CHAR || ch == EOF_CHAR)
break;
}
return _token;
}
protected ref const(Token) parseOp(TokenType op) {
_token.type = op;
skipChar();
return _token;
}
/// get next token
ref const(Token) nextToken() {
setTokenStart();
dchar ch = peekChar();
if (ch == EOF_CHAR)
return parseEof();
if (ch == EOL_CHAR)
return parseEol();
if (ch == ' ' || ch == '\t')
return parseWhiteSpace();
if (ch == '\"')
return parseString();
if (isAlpha(ch))
return parseIdent();
if (isNum(ch))
return parseNumber();
if (ch == '.' && isNum(peekNextChar()))
return parseFloating(0);
if (ch == '/' && peekNextChar() == '/')
return parseSingleLineComment();
if (ch == '/' && peekNextChar() == '*')
return parseMultiLineComment();
switch (ch) {
case '.': return parseOp(TokenType.dot);
case ':': return parseOp(TokenType.colon);
case ';': return parseOp(TokenType.semicolon);
case ',': return parseOp(TokenType.comma);
case '-': return parseOp(TokenType.minus);
case '+': return parseOp(TokenType.plus);
case '{': return parseOp(TokenType.curlyOpen);
case '}': return parseOp(TokenType.curlyClose);
case '(': return parseOp(TokenType.open);
case ')': return parseOp(TokenType.close);
case '[': return parseOp(TokenType.squareOpen);
case ']': return parseOp(TokenType.squareClose);
default:
return parseError();
}
}
string getContextSource() {
string s = toUTF8(_lineText);
if (_pos == 0)
return " near `^^^" ~ s[0..min($,30)] ~ "`";
if (_pos >= _len)
return " near `" ~ s[max(_len - 30, 0) .. $] ~ "^^^`";
return " near `" ~ s[max(_pos - 15, 0) .. _pos] ~ "^^^" ~ s[_pos .. min(_pos + 15, $)] ~ "`";
}
void emitError(string msg) {
throw new ParserException(msg ~ getContextSource(), _filename, _token.line, _token.pos);
}
void emitUnknownPropertyError(string objectName, string propName) {
throw new UnknownPropertyException("Unknown property " ~ objectName ~ "." ~ propName ~ getContextSource(), objectName, propName, _filename, _token.line, _token.pos);
}
void emitUnknownObjectError(string objectName) {
throw new UnknownWidgetException("Unknown widget type " ~ objectName ~ getContextSource(), objectName, _filename, _token.line, _token.pos);
}
void emitError(string msg, ref const Token token) {
throw new ParserException(msg, _filename, token.line, token.pos);
}
}
class MLParser {
protected string _code;
protected string _filename;
protected bool _ownContext;
protected Widget _context;
protected Widget _currentWidget;
protected Tokenizer _tokenizer;
protected Collection!Widget _treeStack;
protected this(string code, string filename = "", Widget context = null) {
_code = code;
_filename = filename;
_context = context;
_tokenizer = new Tokenizer(code, filename);
}
protected Token _token;
/// move to next token
protected void nextToken() {
_token = _tokenizer.nextToken();
Log.d("parsed token: ", _token.type, " ", _token.line, ":", _token.pos, " ", _token.text);
}
/// throw exception if current token is eof
protected void checkNoEof() {
if (_token.type == TokenType.eof)
error("unexpected end of file");
}
/// move to next token, throw exception if eof
protected void nextTokenNoEof() {
nextToken();
checkNoEof();
}
protected void skipWhitespaceAndEols() {
for (;;) {
if (_token.type != TokenType.eol && _token.type != TokenType.whitespace && _token.type != TokenType.comment)
break;
nextToken();
}
if (_token.type == TokenType.error)
error("error while parsing ML code");
}
protected void skipWhitespaceAndEolsNoEof() {
skipWhitespaceAndEols();
checkNoEof();
}
protected void skipWhitespaceNoEof() {
skipWhitespace();
checkNoEof();
}
protected void skipWhitespace() {
for (;;) {
if (_token.type != TokenType.whitespace && _token.type != TokenType.comment)
break;
nextToken();
}
if (_token.type == TokenType.error)
error("error while parsing ML code");
}
protected void error(string msg) {
_tokenizer.emitError(msg);
}
protected void unknownObjectError(string objectName) {
_tokenizer.emitUnknownObjectError(objectName);
}
protected void unknownPropertyError(string objectName, string propName) {
_tokenizer.emitUnknownPropertyError(objectName, propName);
}
Widget createWidget(string name) {
auto metadata = findWidgetMetadata(name);
if (!metadata)
error("Cannot create widget " ~ name ~ " : unregistered widget class");
return metadata.create();
}
protected void createContext(string name) {
if (_context)
error("Context widget is already specified, but identifier " ~ name ~ " is found");
_context = createWidget(name);
_ownContext = true;
}
protected int applySuffix(int value, string suffix) {
if (suffix.length > 0) {
if (suffix.equal("px")) {
// do nothing, value is in px by default
} else if (suffix.equal("pt")) {
value = makePointSize(value);
} else if (suffix.equal("%")) {
value = makePercentSize(value);
} else
error("unknown number suffix: " ~ suffix);
}
return value;
}
protected void setIntProperty(string propName, int value, string suffix = null) {
value = applySuffix(value, suffix);
if (!_currentWidget.setIntProperty(propName, value))
error("unknown int property " ~ propName);
}
protected void setBoolProperty(string propName, bool value) {
if (!_currentWidget.setBoolProperty(propName, value))
error("unknown int property " ~ propName);
}
protected void setFloatProperty(string propName, double value) {
if (!_currentWidget.setDoubleProperty(propName, value))
error("unknown double property " ~ propName);
}
protected void setRectProperty(string propName, Rect value) {
if (!_currentWidget.setRectProperty(propName, value))
error("unknown Rect property " ~ propName);
}
protected void setStringProperty(string propName, string value) {
if (propName.equal("id") || propName.equal("styleId") || propName.equal("backgroundImageId")) {
if (!_currentWidget.setStringProperty(propName, value))
error("cannot set " ~ propName ~ " property for widget");
return;
}
dstring v = toUTF32(value);
if (!_currentWidget.setDstringProperty(propName, v)) {
if (!_currentWidget.setStringProperty(propName, value))
error("unknown string property " ~ propName);
}
}
protected void setIdentProperty(string propName, string value) {
if (propName.equal("id") || propName.equal("styleId") || propName.equal("backgroundImageId")) {
if (!_currentWidget.setStringProperty(propName, value))
error("cannot set id property for widget");
return;
}
if (value.equal("true"))
setBoolProperty(propName, true);
else if (value.equal("false"))
setBoolProperty(propName, false);
else if (value.equal("FILL") || value.equal("FILL_PARENT"))
setIntProperty(propName, FILL_PARENT);
else if (value.equal("WRAP") || value.equal("WRAP_CONTENT"))
setIntProperty(propName, WRAP_CONTENT);
else if (!_currentWidget.setStringProperty(propName, value))
error("unknown ident property " ~ propName);
}
protected void parseRectProperty(string propName) {
// current token is Rect
int[4] values = [0, 0, 0, 0];
nextToken();
skipWhitespaceAndEolsNoEof();
if (_token.type != TokenType.curlyOpen)
error("{ expected after Rect");
nextToken();
skipWhitespaceAndEolsNoEof();
int index = 0;
for (;;) {
if (_token.type == TokenType.curlyClose)
break;
if (_token.type == TokenType.integer) {
if (index >= 4)
error("too many values in Rect");
int n = applySuffix(_token.intvalue, _token.text);
values[index++] = n;
nextToken();
skipWhitespaceAndEolsNoEof();
if (_token.type == TokenType.comma || _token.type == TokenType.semicolon) {
nextToken();
skipWhitespaceAndEolsNoEof();
}
} else if (_token.type == TokenType.ident) {
string name = _token.text;
nextToken();
skipWhitespaceAndEolsNoEof();
if (_token.type != TokenType.colon)
error(": expected after property name " ~ name ~ " in Rect definition");
nextToken();
skipWhitespaceNoEof();
if (_token.type != TokenType.integer)
error("integer expected as Rect property value");
int n = applySuffix(_token.intvalue, _token.text);
if (name.equal("left"))
values[0] = n;
else if (name.equal("top"))
values[1] = n;
else if (name.equal("right"))
values[2] = n;
else if (name.equal("bottom"))
values[3] = n;
else
error("unknown property " ~ name ~ " in Rect");
nextToken();
skipWhitespaceNoEof();
if (_token.type == TokenType.comma || _token.type == TokenType.semicolon) {
nextToken();
skipWhitespaceAndEolsNoEof();
}
} else {
error("invalid Rect definition");
}
}
setRectProperty(propName, Rect(values[0], values[1], values[2], values[3]));
}
protected void parseProperty() {
if (_token.type != TokenType.ident)
error("identifier expected");
string propName = _token.text;
nextToken();
skipWhitespaceNoEof();
if (_token.type == TokenType.colon) { // :
nextTokenNoEof(); // skip :
skipWhitespaceNoEof();
if (_token.type == TokenType.integer)
setIntProperty(propName, _token.intvalue, _token.text);
else if (_token.type == TokenType.minus || _token.type == TokenType.plus) {
int sign = _token.type == TokenType.minus ? -1 : 1;
nextTokenNoEof(); // skip :
skipWhitespaceNoEof();
if (_token.type == TokenType.integer) {
setIntProperty(propName, _token.intvalue * sign, _token.text);
} else if (_token.type == TokenType.floating) {
setFloatProperty(propName, _token.floatvalue * sign);
} else
error("number expected after + and -");
} else if (_token.type == TokenType.floating)
setFloatProperty(propName, _token.floatvalue);
else if (_token.type == TokenType.str)
setStringProperty(propName, _token.text);
else if (_token.type == TokenType.ident) {
if (_token.text.equal("Rect")) {
parseRectProperty(propName);
} else {
setIdentProperty(propName, _token.text);
}
} else
error("int, float, string or identifier are expected as property value");
nextTokenNoEof();
skipWhitespaceNoEof();
if (_token.type == TokenType.semicolon) {
// separated by ;
nextTokenNoEof();
skipWhitespaceAndEolsNoEof();
return;
} else if (_token.type == TokenType.eol) {
nextTokenNoEof();
skipWhitespaceAndEolsNoEof();
return;
} else if (_token.type == TokenType.curlyClose) {
// it was last property in object
return;
}
error("; eol or } expected after property definition");
} else if (_token.type == TokenType.curlyOpen) { // { -- start of object
Widget s = createWidget(propName);
parseWidgetProperties(s);
} else {
error(": or { expected after identifier");
}
}
protected void parseWidgetProperties(Widget w) {
if (_token.type != TokenType.curlyOpen) // {
error("{ is expected");
_treeStack.pushBack(w);
if (_currentWidget)
_currentWidget.addChild(w);
_currentWidget = w;
nextToken(); // skip {
skipWhitespaceAndEols();
for (;;) {
checkNoEof();
if (_token.type == TokenType.curlyClose) // end of object's internals
break;
parseProperty();
}
if (_token.type != TokenType.curlyClose) // {
error("{ is expected");
nextToken(); // skip }
skipWhitespaceAndEols();
_treeStack.popBack();
_currentWidget = _treeStack.peekBack();
}
protected Widget parse() {
try {
nextToken();
skipWhitespaceAndEols();
if (_token.type == TokenType.ident) {
createContext(_token.text);
nextToken();
skipWhitespaceAndEols();
}
if (_token.type != TokenType.curlyOpen) // {
error("{ is expected");
if (!_context)
error("No context widget is specified!");
parseWidgetProperties(_context);
skipWhitespaceAndEols();
if (_token.type != TokenType.eof) // {
error("end of file expected");
return _context;
} catch (Exception e) {
Log.e("exception while parsing ML", e);
if (_context && _ownContext)
destroy(_context);
_context = null;
throw e;
}
}
~this() {
destroy(_tokenizer);
_tokenizer = null;
}
}
/// Parse DlangUI ML code
public Widget parseML(T = Widget)(string code, string filename = "", Widget context = null) {
MLParser parser = new MLParser(code, filename);
scope(exit) destroy(parser);
Widget w = parser.parse();
T res = cast(T) w;
if (w && !res && !context) {
destroy(w);
throw new ParserException("Cannot convert parsed widget to " ~ T.stringof, "", 0, 0);
}
return res;
}
/// tokenize source into array of tokens (excluding EOF)
public Token[] tokenizeML(const(dstring[]) lines) {
string code = toUTF8(join(lines, "\n"));
return tokenizeML(code);
}
/// tokenize source into array of tokens (excluding EOF)
public Token[] tokenizeML(string code) {
Token[] res;
auto tokenizer = new Tokenizer(code, "");
for (;;) {
auto token = tokenizer.nextToken();
if (token.type == TokenType.eof)
break;
res ~= token;
}
return res;
}
//pragma(msg, tokenizeML("Widget {}"));

2
src/dlangui/widgets/widget.d
View File

@ -49,6 +49,7 @@ public import dlangui.graphics.colors;
public import dlangui.core.signals; public import dlangui.core.signals;
public import dlangui.platforms.common.platform; public import dlangui.platforms.common.platform;
public import dlangui.dml.annotations;
import std.algorithm; import std.algorithm;
@ -134,6 +135,7 @@ enum CursorType {
* Base class for all widgets. * Base class for all widgets.
* *
*/ */
@dmlwidget
class Widget { class Widget {
/// widget id /// widget id
protected string _id; protected string _id;