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Finished HTMLTemplate's template substitution implementation.

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Relintai 2024-02-26 18:16:25 +01:00
parent 72c764f74c
commit 984465ee0c
2 changed files with 134 additions and 6 deletions
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137
modules/web/html/html_template.cpp
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@ -227,10 +227,133 @@ String HTMLTemplate::get_template_text(const StringName &p_name) {
return String();
}
String HTMLTemplate::process_template_expression_variable(const String &p_variable, const TemplateExpressionMethods p_method, const Dictionary &p_data) {
String HTMLTemplate::call_template_method(const TemplateExpressionMethods p_method, const Array &p_data) {
int s = p_data.size();
if (p_method != TEMPLATE_EXPRESSION_METHOD_VFORMAT) {
String ret;
for (int i = 0; i < s; ++i) {
switch (p_method) {
case TEMPLATE_EXPRESSION_METHOD_PRINT: {
ret += String(p_data[i]).xml_escape();
} break;
case TEMPLATE_EXPRESSION_METHOD_PRINT_RAW: {
ret += String(p_data[i]);
} break;
case TEMPLATE_EXPRESSION_METHOD_PRINT_BR: {
ret += String(p_data[i]).xml_escape().newline_to_br();
} break;
case TEMPLATE_EXPRESSION_METHOD_PRINT_RAW_BR: {
ret += String(p_data[i]).newline_to_br();
} break;
default:
break;
}
}
return ret;
} else {
//VFormat
ERR_FAIL_COND_V_MSG(s < 1, String(), "vformat requires at least one positional argument!");
Array args;
for (int i = 1; i < s; ++i) {
args.push_back(p_data[i]);
}
String fstring = String(p_data[0]);
bool error = false;
String fmt = fstring.sprintf(args, &error);
ERR_FAIL_COND_V_MSG(error, String(), "vformat error! Format string: " + fstring + " params: " + String(Variant(args)) + " error string: " + fmt);
return fmt;
}
return String();
}
Variant HTMLTemplate::process_template_expression_variable(const String &p_variable, const Dictionary &p_data) {
// "XXX" // String
// 'XXX' // String
// var[1] // Array indexing
// var["x"] // Dictionary indexing
// () just gets used ar variable names, except for an outside one, that gets stripped: (var["x"]), also var[("X")], also var[(1)].
// NO:
// var[var[var[2]]] Recursive indexing doesn't work.
// Remove outside brackets
String variable = p_variable.strip_edges().lstrip("(").rstrip(")").strip_edges();
if (variable.empty()) {
return Variant();
}
// String
if (variable.begins_with("\"")) {
return variable.lstrip("\"").rstrip("\"");
}
// String
if (variable.begins_with("'")) {
return variable.lstrip("'").rstrip("'");
}
int lsqbrace_pos = variable.find("[");
if (lsqbrace_pos == -1) {
// Simplest case
const Variant *element = p_data.getptr(Variant(p_variable));
ERR_FAIL_COND_V_MSG(!element, Variant(), "The given Dictionary does not contain value! " + variable);
return *element;
}
int rsqbrace_pos = variable.find_last("]");
// Has no [, but has ]. Might be a bug, or just ] in name of variable. If it's not intenrional, the error macro will get triggered.
if (rsqbrace_pos == -1) {
const Variant *element = p_data.getptr(Variant(p_variable));
ERR_FAIL_COND_V_MSG(!element, Variant(), "The given Dictionary does not contain value! " + variable);
return *element;
}
String var_name = variable.substr_index(0, lsqbrace_pos);
const Variant *element = p_data.getptr(Variant(var_name));
ERR_FAIL_COND_V_MSG(!element, Variant(), "The given Dictionary does not contain value! " + var_name + " Full variable: " + variable);
String var_index = variable.substr_index(lsqbrace_pos + 1, rsqbrace_pos).lstrip("(").rstrip(")").strip_edges();
Variant final_index;
if (var_index.begins_with("\"")) {
final_index = var_index.lstrip("\"").rstrip("\"");
} else if (variable.begins_with("'")) {
final_index = var_index.lstrip("'").rstrip("'");
} else {
// Try to convert to int, if can't leave as string
if (var_index.is_valid_integer()) {
final_index = var_index.to_int();
} else {
final_index = var_index;
}
}
Variant v = *element;
Variant r = v.get(final_index);
return r;
}
String HTMLTemplate::process_template_expression(const String &p_expression, const Dictionary &p_data) {
// Supported:
// var // equivalent to p(var)
@ -243,6 +366,8 @@ String HTMLTemplate::process_template_expression(const String &p_expression, con
// p(var[1]) // Array indexing
// p(var["x"]) // Dictionary indexing
// p(var1, var2) All methods can do multiple arguments
// Not supported:
// p(var[var[var[2]]]) Recursive indexing.
// No actual method calls. Even though it should be relatively trivial to implement, it's probably not a good idea.
String expression = p_expression.strip_edges();
@ -401,16 +526,17 @@ method_name_search_done:
variables.push_back(current_variable_str);
}
String ret;
Array final_values;
final_values.resize(variables.size());
// Finally let's just process the variables themselves, and generate the final output
for (uint32_t vi = 0; vi < variables.size(); ++vi) {
String variable = variables[vi];
ret += process_template_expression_variable(variable, call_method, p_data);
final_values.set(vi, process_template_expression_variable(variable, p_data));
}
return ret;
return call_template_method(call_method, final_values);
}
String HTMLTemplate::render_template(const String &p_text, const Dictionary &p_data) {
@ -914,7 +1040,8 @@ void HTMLTemplate::_bind_methods() {
ClassDB::bind_method(D_METHOD("get_template_text", "name"), &HTMLTemplate::get_template_text);
ClassDB::bind_method(D_METHOD("process_template_expression_variable", "variable", "method", "data"), &HTMLTemplate::process_template_expression_variable);
ClassDB::bind_method(D_METHOD("call_template_method", "method", "data"), &HTMLTemplate::call_template_method);
ClassDB::bind_method(D_METHOD("process_template_expression_variable", "variable", "data"), &HTMLTemplate::process_template_expression_variable);
ClassDB::bind_method(D_METHOD("process_template_expression", "expression", "data"), &HTMLTemplate::process_template_expression);
ClassDB::bind_method(D_METHOD("render_template", "text", "data"), &HTMLTemplate::render_template);

3
modules/web/html/html_template.h
View File

@ -97,7 +97,8 @@ public:
String get_template_text(const StringName &p_name);
String process_template_expression_variable(const String &p_variable, const TemplateExpressionMethods p_method, const Dictionary &p_data);
String call_template_method(const TemplateExpressionMethods p_method, const Array &p_data);
Variant process_template_expression_variable(const String &p_variable, const Dictionary &p_data);
String process_template_expression(const String &p_expression, const Dictionary &p_data);
String render_template(const String &p_text, const Dictionary &p_data);