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basic attribute handling
main v0.1.1
1 parent 609b88d commit a8c928fc5e521cf83caa89f6a329bffd0690ac1d
@John Pearcey John Pearcey authored on 4 Aug
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 source/attributeHandler.d
* Simple attribute parser.
*
* Remember to escape the " and/or ' with " or ' if these values are required.
*/
class AttribParser {
string strAtts;
string[string] mapAtts;
this( string strAtts ){
this.strAtts = strAtts;
class AttributeMap {
string[string] attrib_map;
this( string strAtts="" ){
if(strAtts!=""){
attrib_map = parse( strAtts );
}
}
ref string[string] getAsMap(){
string[string] getAttribMap( ){
return attrib_map;
}
int getAttribCount( ){
return cast(int)(attrib_map.length);
}
 
string getAttribute( string name ){
if( name in attrib_map ) return attrib_map[name];
return null;
}
string getAttsAsString(){
if(attrib_map.length==0) return "";
string rtn = "";
foreach( key; attrib_map.keys() ){
rtn ~= key ~ "=\"" ~ attrib_map[key] ~ "\" ";
}
return rtn;
}
void setAttribute( string name, string value){
attrib_map[name] = value;
}
void removeAttribute( string name ){
if( name in attrib_map ) attrib_map.remove(name);
}
if(mapAtts !is null ) return mapAtts;
static string[string] parse( string strAtts ){
string[string] mapAtts;
int state = 0;
string nxtKey = "";
string nxtVal = "";
 
writeln( "Testing attribute parsing" );
 
string strAtts = " color=\"red\" font='big font' nowrap v-align='top' border=\"\" ";
AttribParser atts = new AttribParser( strAtts );
auto attMap = atts.getAsMap();
AttributeMap atts = new AttributeMap( strAtts );
auto attMap = atts.getAttribMap();
foreach( key; attMap.keys() ){
string value = attMap[key];
}
}
 
atts = new AttribParser( "" );
attMap = atts.getAsMap();
atts = new AttributeMap( "" );
attMap = atts.getAttribMap();
assert( attMap.length==0 );
 
atts = new AttribParser( "color='pink' > other garbage" );
attMap = atts.getAsMap();
atts = new AttributeMap( "color='pink' > other garbage" );
attMap = atts.getAttribMap();
assert( attMap.length==1 );
assert( attMap["color"]=="pink" );
}
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64
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 source/dom_persist.d
//load the tree in one hit using the tree_id
//also order by the parent_id so that we know all siblings are grouped together
//and then by child order
auto results = db.execute( format("select ID, e_data, p_id, t_id from doctree where tree_id=%d or id=%d order by p_id,c_order", tid, tid) );
auto results = db.execute( format("select ID, e_data, p_id, t_id, att_data from doctree where tree_id=%d or id=%d order by p_id,c_order", tid, tid) );
foreach (row; results){
long id = row.peek!long(0);
long p_id = row.peek!long(2);
id,
row.peek!string(1),
p_id,
getTreeNodeType( row.peek!int(3) )
));
), row.peek!string(4) );
all_nodes[id] = tn;
if(p_id==0) continue;
all_nodes[p_id].child_nodes ~= all_nodes[id];
}
/**
* Create the Database schema for the trees.
*/
static void db_create_schema( ref Database db ){
db.run("CREATE TABLE IF NOT EXISTS doctree (ID INTEGER, e_data TEXT,p_id INTEGER,t_id INTEGER NOT NULL,tree_id INTEGER NOT NULL, c_order INTEGER, PRIMARY KEY( ID AUTOINCREMENT))");
db.run("CREATE TABLE IF NOT EXISTS doctree (ID INTEGER, e_data TEXT,p_id INTEGER,t_id INTEGER NOT NULL,tree_id INTEGER NOT NULL, c_order INTEGER, att_data TEXT, PRIMARY KEY( ID AUTOINCREMENT))");
}
 
/**
* Return a list of all trees in the database with their ID's and names.
//ID for subsequent child writes. This is because the child update will write
 
debug_out("flush():");
 
Statement stmt_insert_with_atts = db.prepare("insert into doctree(e_data, p_id, t_id, tree_id, att_data ) values( ?,?,?,?,? )");
Statement stmt_insert = db.prepare("insert into doctree(e_data, p_id, t_id, tree_id ) values( ?,?,?,? )");
Statement stmt_update_with_atts = db.prepare("update doctree set e_data=?, p_id=?, att_data=? where id=?");
long new_tree = tree_id<0;
 
DocOrderIterator it = new DocOrderIterator( all_nodes[tree_id] );
TreeNode tnode;
if( nd.ID<0 ){
 
if(new_tree) tree_id=0;
db.run( format("insert into doctree(e_data, p_id, t_id, tree_id ) values( '%s', %d, %d, %d )", nd.e_data, nd.pid, nd.type, tree_id ) );
if(tnode.hasAttributes()){
writeln("saving atts: ", tnode.getAttsAsString() );
stmt_insert_with_atts.reset();
stmt_insert_with_atts.bind( 1, nd.e_data);
stmt_insert_with_atts.bind( 2, nd.pid);
stmt_insert_with_atts.bind( 3, nd.type);
stmt_insert_with_atts.bind( 4, tree_id);
stmt_insert_with_atts.bind( 5, tnode.getAttsAsString() );
stmt_insert_with_atts.execute();
}else{
stmt_insert.reset();
stmt_insert.bind( 1, nd.e_data);
stmt_insert.bind( 2, nd.pid);
stmt_insert.bind( 3, nd.type);
stmt_insert.bind( 4, tree_id);
stmt_insert.execute();
 
}
 
//update the node id
long oldid = tnode.node_data.ID;
long nnid = db.lastInsertRowid;
if(new_tree) tree_id = newID;
}else if( nd.dirty ){
//dirty data and possibly pid too
db.run( format("update doctree set e_data='%s', p_id=%d where id=%d", nd.e_data, nd.pid, nd.ID ) );
//dirty data and possibly pid and atributes
stmt_update_with_atts.reset();
stmt_update_with_atts.bind( 1, nd.e_data );
stmt_update_with_atts.bind( 2, nd.pid );
stmt_update_with_atts.bind( 3, tnode.getAttsAsString() );
stmt_update_with_atts.bind( 4, nd.ID );
stmt_update_with_atts.execute();
nd.dirty = false;
}
}
 
TreeNode[] children = tn.child_nodes;
foreach( child; children){
NodeData nd = child.node_data;
strRtn ~= get_openTag_commence( nd.type, nd.e_data );
// --> add attributes if required
if(nd.type==TreeNodeType.element && child.hasAttributes() ) strRtn ~= " "~child.getAttsAsString();
strRtn ~= get_openTag_end( nd.type, nd.e_data );
strRtn ~= getTreeAsText_r( child );
strRtn ~= get_closeTag( nd.type, nd.e_data );
}
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source/dom_persist_tests.d
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source/nodecode.d