protected TALCommand Compile_METAL_FILL_PARAM(string argument)
{
// Compile a fill-param command, resulting argument is:
// Argument: [(paramName, paramPath),...]
// Break up the list of defines first
List<DefineInfo> commandArgs = new List<DefineInfo>();
// We only want to match semi-colons that are not escaped
foreach (string defStmt in Constants.METAL_FILL_PARAM_REGEX.Split(argument))
{
// remove any leading space and un-escape any semi-colons
string defineStmt = defStmt.TrimStart().Replace(";;", ";");
// Break each defineStmt into pieces "[local|global] varName expression"
List<string> stmtBits = new List<string>(defineStmt.Split(new char[] { ' ' }));
string varName;
string expression;
if (stmtBits.Count < 2)
{
// Error, badly formed fill-param command
string msg = string.Format("Badly formed fill-param command '{0}'. Fill-param commands must be of the form: 'varName expression[;varName expression]'", argument);
throw new TemplateParseException(this.currentStartTag, msg);
}
varName = stmtBits[0];
expression = string.Join(" ", stmtBits.GetRange(1, stmtBits.Count - 1).ToArray());
DefineInfo di = new DefineInfo();
di.defAction = DefineAction.Local;
di.varName = varName;
di.varPath = expression;
commandArgs.Add(di);
}
// Determine what use-macro statement this belongs to by working through the list backwards
int? ourMacroLocation = null;
int location = this.tagStack.Count - 1;
while (ourMacroLocation == null)
{
int macroLocation = this.tagStack[location].UseMacroLocation;
if (macroLocation != -1)
{
ourMacroLocation = macroLocation;
}
else
{
location -= 1;
if (location < 0)
{
string msg = string.Format("metal:fill-param must be used inside a metal:use-macro call");
throw new TemplateParseException(this.currentStartTag, msg);
}
}
}
// Get the use-macro command we are going to adjust
TALCommand cmnd = this.commandList[(int)ourMacroLocation];
string macroName = (string)cmnd.Attributes[0];
Dictionary<string, TALSubProgram> slotMap = (Dictionary<string, TALSubProgram>)cmnd.Attributes[1];
List<DefineInfo> paramMap = (List<DefineInfo>)cmnd.Attributes[2];
int endSymbol = (int)cmnd.Attributes[3];
// Append param definitions to list
paramMap.AddRange(commandArgs);
// Update the command
TALCommand ci = new TALCommand();
ci.Tag = cmnd.Tag;
ci.ID = cmnd.ID;
ci.Attributes = new List<object>();
ci.Attributes.Add(macroName);
ci.Attributes.Add(slotMap);
ci.Attributes.Add(paramMap);
ci.Attributes.Add(endSymbol);
this.commandList[(int)ourMacroLocation] = ci;
return null;
}
protected TALCommand Compile_METAL_FILL_SLOT(string argument)
{
if (argument.Length == 0)
{
// No argument passed
string msg = "No argument passed! fill-slot commands must be of the form: 'fill-slot: name'";
throw new TemplateParseException(this.currentStartTag, msg);
}
// Check that the name of the slot is valid
if (Constants.METAL_NAME_REGEX.Match(argument).Length != argument.Length)
{
string msg = string.Format("Slot name {0} is invalid.", argument);
throw new TemplateParseException(this.currentStartTag, msg);
}
// Determine what use-macro statement this belongs to by working through the list backwards
int? ourMacroLocation = null;
int location = this.tagStack.Count - 1;
while (ourMacroLocation == null)
{
int macroLocation = this.tagStack[location].UseMacroLocation;
if (macroLocation != -1)
{
ourMacroLocation = macroLocation;
}
else
{
location -= 1;
if (location < 0)
{
string msg = string.Format("metal:fill-slot must be used inside a metal:use-macro call");
throw new TemplateParseException(this.currentStartTag, msg);
}
}
}
// Get the use-macro command we are going to adjust
TALCommand cmnd = this.commandList[(int)ourMacroLocation];
string macroName = (string)cmnd.Attributes[0];
Dictionary<string, TALSubProgram> slotMap = (Dictionary<string, TALSubProgram>)cmnd.Attributes[1];
List<DefineInfo> paramMap = (List<DefineInfo>)cmnd.Attributes[2];
int endSymbol = (int)cmnd.Attributes[3];
if (slotMap.ContainsKey(argument))
{
string msg = string.Format("Slot {0} has already been filled!", argument);
throw new TemplateParseException(this.currentStartTag, msg);
}
// The slot starts at the next command.
TALSubProgram slot = new TALSubProgram(this.commandList.Count, this.endTagSymbol);
slotMap.Add(argument, slot);
// Update the command
TALCommand ci = new TALCommand();
ci.Tag = cmnd.Tag;
ci.ID = cmnd.ID;
ci.Attributes = new List<object>();
ci.Attributes.Add(macroName);
ci.Attributes.Add(slotMap);
ci.Attributes.Add(paramMap);
ci.Attributes.Add(endSymbol);
this.commandList[(int)ourMacroLocation] = ci;
return null;
}
protected TALCommand Compile_METAL_DEFINE_PARAM(string argument)
{
// Compile a define-param command, resulting argument is:
// Argument: [(paramType, paramName, paramPath),...]
// Break up the list of defines first
List<DefineInfo> commandArgs = new List<DefineInfo>();
// We only want to match semi-colons that are not escaped
foreach (string defStmt in Constants.METAL_DEFINE_PARAM_REGEX.Split(argument))
{
// remove any leading space and un-escape any semi-colons
string defineStmt = defStmt.TrimStart().Replace(";;", ";");
// Break each defineStmt into pieces "[local|global] varName expression"
List<string> stmtBits = new List<string>(defineStmt.Split(new char[] { ' ' }));
string varType;
string varName;
string expression;
if (stmtBits.Count < 3)
{
// Error, badly formed define-param command
string msg = string.Format("Badly formed define-param command '{0}'. Define commands must be of the form: 'varType varName expression[;varType varName expression]'", argument);
throw new TemplateParseException(this.currentStartTag, msg);
}
varType = stmtBits[0];
varName = stmtBits[1];
expression = string.Join(" ", stmtBits.GetRange(2, stmtBits.Count - 2).ToArray());
DefineInfo di = new DefineInfo();
di.defAction = DefineAction.Local;
di.varType = varType;
di.varName = varName;
di.varPath = expression;
commandArgs.Add(di);
}
TALCommand ci = new TALCommand();
ci.Tag = this.currentStartTag;
ci.ID = Constants.METAL_DEFINE_PARAM;
ci.Attributes = new List<object>();
ci.Attributes.Add(commandArgs);
return ci;
}
protected TALCommand Compile_METAL_DEFINE_SLOT(string argument)
{
// Compile a define-slot command, resulting argument is:
// Argument: macroName, endTagSymbol
if (argument.Length == 0)
{
// No argument passed
string msg = "No argument passed! define-slot commands must be of the form: 'name'";
throw new TemplateParseException(this.currentStartTag, msg);
}
// Check that the name of the slot is valid
if (Constants.METAL_NAME_REGEX.Match(argument).Length != argument.Length)
{
string msg = string.Format("Slot name {0} is invalid.", argument);
throw new TemplateParseException(this.currentStartTag, msg);
}
TALCommand ci = new TALCommand();
ci.Tag = this.currentStartTag;
ci.ID = Constants.METAL_DEFINE_SLOT;
ci.Attributes = new List<object>();
ci.Attributes.Add(argument);
ci.Attributes.Add(this.endTagSymbol);
return ci;
}
protected void AddCommand(TALCommand command)
{
// <DEBUG>
//this.LogCommand(command);
// </DEBUG>
//
// Only following commands can be used inside Tags without scope:
// TAL_DEFINE, TAL_OUTPUT
// Following commands are ignored by the "SourceGenerator" class:
// TAL_START_SCOPE, TAL_STARTTAG, TAL_ENDTAG_ENDSCOPE, TAL_OMITTAG
//
if (command.Tag != null &&
command.Tag.OmitTagScope == true &&
command.ID != Constants.TAL_DEFINE &&
command.ID != Constants.TAL_OUTPUT &&
command.ID != Constants.TAL_START_SCOPE &&
command.ID != Constants.TAL_STARTTAG &&
command.ID != Constants.TAL_ENDTAG_ENDSCOPE &&
command.ID != Constants.TAL_OMITTAG)
{
// This command can not be used inside tag without his own scope
string msg = string.Format(@"Command ""{0}"" can not be used inside tag <tal:omit-scope>'.",
Constants.GetCommandName(command.ID));
throw new TemplateParseException(this.currentStartTag, msg);
}
if (command.ID == Constants.TAL_OUTPUT &&
this.commandList.Count > 0 &&
this.commandList[this.commandList.Count - 1].ID == Constants.TAL_OUTPUT)
{
// We can combine output commands
TALCommand cmd = this.commandList[this.commandList.Count - 1];
foreach (object att in command.Attributes)
cmd.Attributes.Add(att);
}
else
{
this.commandList.Add(command);
}
}
protected void addTag(Tag tag, Dictionary<string, string> cleanAttributes, Dictionary<string, object> tagProperties)
{
// Used to add a tag to the stack. Various properties can be passed in the dictionary
// as being information required by the tag.
// Currently supported properties are:
// 'command' - The (command,args) tuple associated with this command
// 'originalAtts' - The original attributes that include any metal/tal attributes
// 'endTagSymbol' - The symbol associated with the end tag for this element
// 'popFunctionList' - A list of functions to execute when this tag is popped
// 'singletonTag' - A boolean to indicate that this is a singleton flag
tag.Attributes = cleanAttributes;
// Add the tag to the tagStack (list of tuples (tag, properties, useMacroLocation))
TALCommand command = (TALCommand)(tagProperties.ContainsKey("command") ? tagProperties["command"] : null);
Dictionary<string, string> originalAtts = (Dictionary<string, string>)(tagProperties.ContainsKey("originalAtts") ? tagProperties["originalAtts"] : null);
int singletonTag = (int)(tagProperties.ContainsKey("singletonTag") ? tagProperties["singletonTag"] : 0);
TagInfo ti = new TagInfo();
if (command != null)
{
if (command.ID == Constants.METAL_USE_MACRO)
{
ti.Tag = tag;
ti.Properties = tagProperties;
ti.UseMacroLocation = this.commandList.Count + 1;
}
else
{
ti.Tag = tag;
ti.Properties = tagProperties;
ti.UseMacroLocation = -1;
}
}
else
{
ti.Tag = tag;
ti.Properties = tagProperties;
ti.UseMacroLocation = -1;
}
this.tagStack.Add(ti);
if (command != null)
{
// All tags that have a TAL attribute on them start with a 'start scope'
TALCommand cmd = new TALCommand();
cmd.Tag = this.currentStartTag;
cmd.ID = Constants.TAL_START_SCOPE;
cmd.Attributes = new List<object>();
cmd.Attributes.Add(originalAtts);
cmd.Attributes.Add(cleanAttributes);
this.AddCommand(cmd);
// Now we add the TAL command
this.AddCommand(command);
}
else
{
// It's just a straight output, so create an output command and append it
TALCommand cmd = new TALCommand();
cmd.Tag = this.currentStartTag;
cmd.ID = Constants.TAL_OUTPUT;
cmd.Attributes = new List<object>();
cmd.Attributes.Add(this.tagAsText(tag, singletonTag));
this.AddCommand(cmd);
}
}
protected void parseStartTag(Tag tag, Dictionary<string, string> attributes, int singletonElement)
{
// Note down the tag we are handling, it will be used for error handling during
// compilation
this.currentStartTag = new Tag();
this.currentStartTag.Name = tag.Name;
this.currentStartTag.Attributes = attributes;
this.currentStartTag.SourcePath = tag.SourcePath;
this.currentStartTag.LineNumber = tag.LineNumber;
this.currentStartTag.LinePosition = tag.LinePosition;
// Look for tal/metal attributes
List<int> foundTALAtts = new List<int>();
List<int> foundMETALAtts = new List<int>();
Dictionary<int, string> foundCommandsArgs = new Dictionary<int, string>();
Dictionary<string, string> cleanAttributes = new Dictionary<string, string>();
Dictionary<string, string> originalAttributes = new Dictionary<string, string>();
Dictionary<string, object> tagProperties = new Dictionary<string, object>();
List<VoidFuncDelegate> popTagFuncList = new List<VoidFuncDelegate>();
bool isTALElementNameSpace = false;
string prefixToAdd = "";
tagProperties.Add("singletonTag", singletonElement);
// Determine whether this element is in either the METAL or TAL namespace
if (tag.Name.IndexOf(':') > 0)
{
// We have a namespace involved, so let's look to see if its one of ours
string _namespace = tag.Name.Substring(0, tag.Name.IndexOf(':'));
if (_namespace == this.metal_namespace_prefix)
{
isTALElementNameSpace = true;
prefixToAdd = this.metal_namespace_prefix + ":";
}
else if (_namespace == this.tal_namespace_prefix)
{
// This tag has not his own scope
if (tag.Name == tal_namespace_omitscope)
{
tag.OmitTagScope = true;
this.currentStartTag.OmitTagScope = true;
}
isTALElementNameSpace = true;
prefixToAdd = this.tal_namespace_prefix + ":";
}
if (isTALElementNameSpace)
{
// We should treat this an implicit omit-tag
foundTALAtts.Add(Constants.TAL_OMITTAG);
// Will go to default, i.e. yes
foundCommandsArgs[Constants.TAL_OMITTAG] = "";
}
}
foreach (KeyValuePair<string, string> attr in attributes)
{
string att = attr.Key;
string value = attr.Value;
string commandAttName = "";
originalAttributes.Add(att, value);
if (isTALElementNameSpace && !(att.IndexOf(':') > 0))
{
// This means that the attribute name does not have a namespace, so use the prefix for this tag.
commandAttName = prefixToAdd + att;
}
else
{
commandAttName = att;
}
if (att.Length > 4 && att.Substring(0, 5) == "xmlns")
{
// We have a namespace declaration.
string prefix = att.Length > 5 ? att.Substring(6) : "";
if (value == Constants.METAL_NAME_URI)
{
// It's a METAL namespace declaration
if (prefix.Length > 0)
{
this.metal_namespace_prefix_stack.Add(this.metal_namespace_prefix);
this.setMETALPrefix(prefix);
// We want this function called when the scope ends
popTagFuncList.Add(this.popMETALNamespace);
}
else
{
// We don't allow METAL/TAL to be declared as a default
string msg = "Can not use METAL name space by default, a prefix must be provided.";
throw new TemplateParseException(this.currentStartTag, msg);
}
}
else if (value == Constants.TAL_NAME_URI)
{
// TAL this time
if (prefix.Length > 0)
{
this.tal_namespace_prefix_stack.Add(this.tal_namespace_prefix);
this.setTALPrefix(prefix);
// We want this function called when the scope ends
popTagFuncList.Add(this.popTALNamespace);
}
else
{
// We don't allow METAL/TAL to be declared as a default
string msg = "Can not use TAL name space by default, a prefix must be provided.";
throw new TemplateParseException(this.currentStartTag, msg);
}
}
else
{
// It's nothing special, just an ordinary namespace declaration
cleanAttributes.Add(att, value);
}
}
else if (this.tal_attribute_map.ContainsKey(commandAttName))
{
// It's a TAL attribute
int cmnd = this.tal_attribute_map[commandAttName];
if (cmnd == Constants.TAL_OMITTAG && isTALElementNameSpace)
{
//this.log.warn("Supressing omit-tag command present on TAL or METAL element");
}
else
{
foundCommandsArgs.Add(cmnd, value);
foundTALAtts.Add(cmnd);
}
}
else if (this.metal_attribute_map.ContainsKey(commandAttName))
{
// It's a METAL attribute
int cmnd = this.metal_attribute_map[commandAttName];
foundCommandsArgs.Add(cmnd, value);
foundMETALAtts.Add(cmnd);
}
else
{
cleanAttributes.Add(att, value);
}
}
tagProperties.Add("popFunctionList", popTagFuncList);
// This might be just content
if ((foundTALAtts.Count + foundMETALAtts.Count) == 0)
{
// Just content, add it to the various stacks
this.addTag(tag, cleanAttributes, tagProperties);
return;
}
// Create a symbol for the end of the tag - we don't know what the offset is yet
this.endTagSymbol += 1;
tagProperties.Add("endTagSymbol", this.endTagSymbol);
// Sort the METAL commands by priority. Priority is defined by opcode number, see Constants.METAL_* opcodes.
foundMETALAtts.Sort();
// Sort the TAL commands by priority. Priority is defined by opcode number, see Constants.TAL_* opcodes.
foundTALAtts.Sort();
// We handle the METAL before the TAL
List<int> allCommands = new List<int>();
allCommands.AddRange(foundMETALAtts);
allCommands.AddRange(foundTALAtts);
int firstTag = 1;
foreach (int talAtt in allCommands)
{
// Parse and create a command for each
TALCommand cmnd = this.commandHandler[talAtt](foundCommandsArgs[talAtt]);
if (cmnd != null)
{
if (firstTag == 1)
{
// The first one needs to add the tag
firstTag = 0;
tagProperties["originalAtts"] = originalAttributes;
tagProperties["command"] = cmnd;
this.addTag(tag, cleanAttributes, tagProperties);
}
else
{
// All others just append
this.AddCommand(cmnd);
}
}
}
TALCommand cmd = new TALCommand();
cmd.Tag = this.currentStartTag;
cmd.ID = Constants.TAL_STARTTAG;
cmd.Attributes = new List<object>();
cmd.Attributes.Add(tag);
cmd.Attributes.Add(singletonElement);
if (firstTag == 1)
{
tagProperties["originalAtts"] = originalAttributes;
tagProperties["command"] = cmd;
this.addTag(tag, cleanAttributes, tagProperties);
}
else
{
// Add the start tag command in as a child of the last TAL command
this.AddCommand(cmd);
}
}
protected TALCommand Compile_TAL_CONTENT(string argument, int replaceFlag)
{
// Compile a content command, resulting argument is
// (replaceFlag, structureFlag, expression, endTagSymbol)
// Sanity check
if (argument.Length == 0)
{
// No argument passed
string msg = "No argument passed! content/replace commands must be of the form: 'path'";
throw new TemplateParseException(this.currentStartTag, msg);
}
int structureFlag = 0;
string[] attProps = argument.Split(new char[] { ' ' });
string express = "";
if (attProps.Length > 1)
{
if (attProps[0] == "structure")
{
structureFlag = 1;
express = string.Join(" ", attProps, 1, attProps.Length - 1);
}
else if (attProps[1] == "text")
{
structureFlag = 0;
express = string.Join(" ", attProps, 1, attProps.Length - 1);
}
else
{
// It's not a type selection after all - assume it's part of the path
express = argument;
}
}
else
express = argument;
TALCommand ci = new TALCommand();
ci.Tag = this.currentStartTag;
ci.ID = Constants.TAL_CONTENT;
ci.Attributes = new List<object>();
ci.Attributes.Add(replaceFlag);
ci.Attributes.Add(structureFlag);
ci.Attributes.Add(express);
ci.Attributes.Add(this.endTagSymbol);
return ci;
}
protected void LogCommand(TALCommand cmd)
{
List<string> attributes = new List<string>();
if (cmd.Attributes != null)
{
foreach (object attr in cmd.Attributes)
{
attributes.Add(string.Format(@"{0} {1}", Environment.NewLine, attr));
}
}
Console.WriteLine("{0}Command: {1}{2}",
Environment.NewLine, Constants.GetCommandName(cmd.ID), string.Join("", attributes.ToArray()));
}
protected void parseData(string data)
{
// Just add it as an output
TALCommand cmd = new TALCommand();
cmd.Tag = this.currentStartTag;
cmd.ID = Constants.TAL_OUTPUT;
cmd.Attributes = new List<object>();
cmd.Attributes.Add(data);
this.AddCommand(cmd);
}
protected TALCommand Compile_TAL_REPEAT(string argument)
{
// Compile a repeat command, resulting argument is:
// (varname, expression, endTagSymbol)
List<string> attProps = new List<string>(argument.Split(new char[] { ' ' }));
if (attProps.Count < 2)
{
// Error, badly formed repeat command
string msg = string.Format("Badly formed repeat command '{0}'. Repeat commands must be of the form: 'localVariable path'", argument);
throw new TemplateParseException(this.currentStartTag, msg);
}
string varName = attProps[0];
string expression = string.Join(" ", attProps.GetRange(1, attProps.Count - 1).ToArray());
TALCommand ci = new TALCommand();
ci.Tag = this.currentStartTag;
ci.ID = Constants.TAL_REPEAT;
ci.Attributes = new List<object>();
ci.Attributes.Add(varName);
ci.Attributes.Add(expression);
ci.Attributes.Add(this.endTagSymbol);
return ci;
}
protected TALCommand Compile_TAL_OMITTAG(string argument)
{
// Compile a condition command, resulting argument is:
// path
// If no argument is given then set the path to default
string expression = "";
if (argument.Length == 0)
expression = Constants.DEFAULT_VALUE_EXPRESSION;
else
expression = argument;
TALCommand ci = new TALCommand();
ci.Tag = this.currentStartTag;
ci.ID = Constants.TAL_OMITTAG;
ci.Attributes = new List<object>();
ci.Attributes.Add(expression);
return ci;
}
protected TALCommand Compile_TAL_DEFINE(string argument)
{
// Compile a define command, resulting argument is:
// [(DefineAction (global, local, set), variableName, variablePath),...]
// Break up the list of defines first
List<DefineInfo> commandArgs = new List<DefineInfo>();
// We only want to match semi-colons that are not escaped
foreach (string defStmt in Constants.TAL_DEFINE_REGEX.Split(argument))
{
// remove any leading space and un-escape any semi-colons
string defineStmt = defStmt.TrimStart().Replace(";;", ";");
// Break each defineStmt into pieces "[local|global] varName expression"
List<string> stmtBits = new List<string>(defineStmt.Split(new char[] { ' ' }));
DefineAction defAction = DefineAction.Local;
string varName;
string expression;
if (stmtBits.Count < 2)
{
// Error, badly formed define command
string msg = string.Format("Badly formed define command '{0}'. Define commands must be of the form: '[local|global] varName expression[;[local|global] varName expression]'", argument);
throw new TemplateParseException(this.currentStartTag, msg);
}
// Assume to start with that >2 elements means a local|global flag
if (stmtBits.Count > 2)
{
if (stmtBits[0] == "global")
{
defAction = DefineAction.Global;
varName = stmtBits[1];
expression = string.Join(" ", stmtBits.GetRange(2, stmtBits.Count - 2).ToArray());
}
else if (stmtBits[0] == "local")
{
varName = stmtBits[1];
expression = string.Join(" ", stmtBits.GetRange(2, stmtBits.Count - 2).ToArray());
}
else if (stmtBits[0] == "set")
{
defAction = DefineAction.SetLocal;
varName = stmtBits[1];
expression = string.Join(" ", stmtBits.GetRange(2, stmtBits.Count - 2).ToArray());
}
else
{
// Must be a space in the expression that caused the >3 thing
varName = stmtBits[0];
expression = string.Join(" ", stmtBits.GetRange(1, stmtBits.Count - 1).ToArray());
}
}
else
{
// Only two bits
varName = stmtBits[0];
expression = string.Join(" ", stmtBits.GetRange(1, stmtBits.Count - 1).ToArray());
}
DefineInfo di = new DefineInfo();
di.defAction = defAction;
di.varName = varName;
di.varPath = expression;
commandArgs.Add(di);
}
TALCommand ci = new TALCommand();
ci.Tag = this.currentStartTag;
ci.ID = Constants.TAL_DEFINE;
ci.Attributes = new List<object>();
ci.Attributes.Add(commandArgs);
return ci;
}
protected TALCommand Compile_METAL_USE_MACRO(string argument)
{
// Sanity check
if (argument.Length == 0)
{
// No argument passed
string msg = "No argument passed! use-macro commands must be of the form: 'use-macro: path'";
throw new TemplateParseException(this.currentStartTag, msg);
}
TALCommand ci = new TALCommand();
ci.Tag = this.currentStartTag;
ci.ID = Constants.METAL_USE_MACRO;
ci.Attributes = new List<object>();
ci.Attributes.Add(argument);
ci.Attributes.Add(new Dictionary<string, TALSubProgram>());
ci.Attributes.Add(new List<DefineInfo>());
ci.Attributes.Add(this.endTagSymbol);
return ci;
}
protected void popTag(Tag tag, int omitTagFlag)
{
// omitTagFlag is used to control whether the end tag should be included in the
// output or not. In HTML 4.01 there are several tags which should never have
// end tags, this flag allows the template compiler to specify that these
// should not be output.
while (this.tagStack.Count > 0)
{
TagInfo ti = this.tagStack[this.tagStack.Count - 1];
this.tagStack.RemoveAt(this.tagStack.Count - 1);
Tag oldTag = ti.Tag;
Dictionary<string, object> tagProperties = ti.Properties;
int? endTagSymbol = (int?)(tagProperties.ContainsKey("endTagSymbol") ? tagProperties["endTagSymbol"] : null);
List<VoidFuncDelegate> popCommandList = (List<VoidFuncDelegate>)(tagProperties.ContainsKey("popCommandList") ? tagProperties["popCommandList"] : null);
int singletonTag = (int)(tagProperties.ContainsKey("singletonTag") ? tagProperties["singletonTag"] : 0);
if (popCommandList != null)
{
foreach (VoidFuncDelegate func in popCommandList)
{
func();
}
}
if (oldTag.Name == tag.Name)
{
// We've found the right tag, now check to see if we have any TAL commands on it
if (endTagSymbol != null)
{
// We have a command (it's a TAL tag)
// Note where the end tag symbol should point (i.e. the next command)
this.symbolLocationTable[(int)endTagSymbol] = this.commandList.Count;
// We need a "close scope and tag" command
TALCommand cmd = new TALCommand();
cmd.Tag = this.currentStartTag;
cmd.ID = Constants.TAL_ENDTAG_ENDSCOPE;
cmd.Attributes = new List<object>();
cmd.Attributes.Add(tag.Name);
cmd.Attributes.Add(omitTagFlag);
cmd.Attributes.Add(singletonTag);
this.AddCommand(cmd);
return;
}
else if (omitTagFlag == 0 && singletonTag == 0)
{
// We are popping off an un-interesting tag, just add the close as text
// We need a "close scope and tag" command
TALCommand cmd = new TALCommand();
cmd.Tag = this.currentStartTag;
cmd.ID = Constants.TAL_OUTPUT;
cmd.Attributes = new List<object>();
cmd.Attributes.Add("</" + tag.Name + ">");
this.AddCommand(cmd);
return;
}
else
{
// We are suppressing the output of this tag, so just return
return;
}
}
else
{
// We have a different tag, which means something like <br> which never closes is in
// between us and the real tag.
// If the tag that we did pop off has a command though it means un-balanced TAL tags!
if (endTagSymbol != null)
{
// ERROR
string msg = string.Format("TAL/METAL Elements must be balanced - found close tag {0} expecting {1}", tag.Name, oldTag.Name);
throw new TemplateParseException(oldTag, msg);
}
}
}
throw new TemplateParseException(null,
string.Format("</{0}> {1}", tag.Name, "Close tag encountered with no corresponding open tag."));
}
protected TALCommand Compile_TAL_ATTRIBUTES(string argument)
{
// Compile tal:attributes into attribute command
// Argument: [(attributeName, expression)]
// Break up the list of attribute settings first
Dictionary<string, string> commandArgs = new Dictionary<string, string>();
// We only want to match semi-colons that are not escaped
foreach (string attStmt in Constants.TAL_ATTRIBUTES_REGEX.Split(argument))
{
// remove any leading space and un-escape any semi-colons
string attributeStmt = attStmt.TrimStart().Replace(";;", ";");
// Break each attributeStmt into name and expression
List<string> stmtBits = new List<string>(attributeStmt.Split(new char[] { ' ' }));
if (stmtBits.Count < 2)
{
// Error, badly formed attributes command
string msg = string.Format("Badly formed attributes command '{0}'. Attributes commands must be of the form: 'name expression[;name expression]'", argument);
throw new TemplateParseException(this.currentStartTag, msg);
}
string attName = stmtBits[0];
string attExpr = string.Join(" ", stmtBits.GetRange(1, stmtBits.Count - 1).ToArray());
commandArgs.Add(attName, attExpr);
}
TALCommand ci = new TALCommand();
ci.Tag = this.currentStartTag;
ci.ID = Constants.TAL_ATTRIBUTES;
ci.Attributes = new List<object>();
ci.Attributes.Add(commandArgs);
return ci;
}
protected TALCommand Compile_TAL_CONDITION(string argument)
{
// Compile a condition command, resulting argument is:
// path, endTagSymbol
// Sanity check
if (argument.Length == 0)
{
// No argument passed
string msg = "No argument passed! condition commands must be of the form: 'path'";
throw new TemplateParseException(this.currentStartTag, msg);
}
TALCommand ci = new TALCommand();
ci.Tag = this.currentStartTag;
ci.ID = Constants.TAL_CONDITION;
ci.Attributes = new List<object>();
ci.Attributes.Add(argument);
ci.Attributes.Add(this.endTagSymbol);
return ci;
}
