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#include "sass.hpp"
#include <string>
#include <sstream>
#include <iostream>
#include <iomanip>
#include "ast.hpp"
#include "json.hpp"
#include "context.hpp"
#include "position.hpp"
#include "source_map.hpp"
namespace Sass {
SourceMap::SourceMap() : current_position(0, 0, 0), file("stdin") { }
SourceMap::SourceMap(const std::string& file) : current_position(0, 0, 0), file(file) { }
std::string SourceMap::render_srcmap(Context &ctx) {
const bool include_sources = ctx.c_options.source_map_contents;
const std::vector<std::string> links = ctx.srcmap_links;
const std::vector<Resource>& sources(ctx.resources);
JsonNode* json_srcmap = json_mkobject();
json_append_member(json_srcmap, "version", json_mknumber(3));
const char *file_name = file.c_str();
JsonNode *json_file_name = json_mkstring(file_name);
json_append_member(json_srcmap, "file", json_file_name);
// pass-through sourceRoot option
if (!ctx.source_map_root.empty()) {
JsonNode* root = json_mkstring(ctx.source_map_root.c_str());
json_append_member(json_srcmap, "sourceRoot", root);
}
JsonNode *json_sources = json_mkarray();
for (size_t i = 0; i < source_index.size(); ++i) {
std::string source(links[source_index[i]]);
if (ctx.c_options.source_map_file_urls) {
source = File::rel2abs(source);
// check for windows abs path
if (source[0] == '/') {
// ends up with three slashes
source = "file://" + source;
} else {
// needs an additional slash
source = "file:///" + source;
}
}
const char* source_name = source.c_str();
JsonNode *json_source_name = json_mkstring(source_name);
json_append_element(json_sources, json_source_name);
}
json_append_member(json_srcmap, "sources", json_sources);
if (include_sources && source_index.size()) {
JsonNode *json_contents = json_mkarray();
for (size_t i = 0; i < source_index.size(); ++i) {
const Resource& resource(sources[source_index[i]]);
JsonNode *json_content = json_mkstring(resource.contents);
json_append_element(json_contents, json_content);
}
json_append_member(json_srcmap, "sourcesContent", json_contents);
}
JsonNode *json_names = json_mkarray();
// so far we have no implementation for names
// no problem as we do not alter any identifiers
json_append_member(json_srcmap, "names", json_names);
std::string mappings = serialize_mappings();
JsonNode *json_mappings = json_mkstring(mappings.c_str());
json_append_member(json_srcmap, "mappings", json_mappings);
char *str = json_stringify(json_srcmap, "\t");
std::string result = std::string(str);
free(str);
json_delete(json_srcmap);
return result;
}
std::string SourceMap::serialize_mappings() {
std::string result = "";
size_t previous_generated_line = 0;
size_t previous_generated_column = 0;
size_t previous_original_line = 0;
size_t previous_original_column = 0;
size_t previous_original_file = 0;
for (size_t i = 0; i < mappings.size(); ++i) {
const size_t generated_line = mappings[i].generated_position.line;
const size_t generated_column = mappings[i].generated_position.column;
const size_t original_line = mappings[i].original_position.line;
const size_t original_column = mappings[i].original_position.column;
const size_t original_file = mappings[i].original_position.file;
if (generated_line != previous_generated_line) {
previous_generated_column = 0;
if (generated_line > previous_generated_line) {
result += std::string(generated_line - previous_generated_line, ';');
previous_generated_line = generated_line;
}
}
else if (i > 0) {
result += ",";
}
// generated column
result += base64vlq.encode(static_cast<int>(generated_column) - static_cast<int>(previous_generated_column));
previous_generated_column = generated_column;
// file
result += base64vlq.encode(static_cast<int>(original_file) - static_cast<int>(previous_original_file));
previous_original_file = original_file;
// source line
result += base64vlq.encode(static_cast<int>(original_line) - static_cast<int>(previous_original_line));
previous_original_line = original_line;
// source column
result += base64vlq.encode(static_cast<int>(original_column) - static_cast<int>(previous_original_column));
previous_original_column = original_column;
}
return result;
}
void SourceMap::prepend(const OutputBuffer& out)
{
Offset size(out.smap.current_position);
for (Mapping mapping : out.smap.mappings) {
if (mapping.generated_position.line > size.line) {
throw(std::runtime_error("prepend sourcemap has illegal line"));
}
if (mapping.generated_position.line == size.line) {
if (mapping.generated_position.column > size.column) {
throw(std::runtime_error("prepend sourcemap has illegal column"));
}
}
}
// adjust the buffer offset
prepend(Offset(out.buffer));
// now add the new mappings
VECTOR_UNSHIFT(mappings, out.smap.mappings);
}
void SourceMap::append(const OutputBuffer& out)
{
append(Offset(out.buffer));
}
void SourceMap::prepend(const Offset& offset)
{
if (offset.line != 0 || offset.column != 0) {
for (Mapping& mapping : mappings) {
// move stuff on the first old line
if (mapping.generated_position.line == 0) {
mapping.generated_position.column += offset.column;
}
// make place for the new lines
mapping.generated_position.line += offset.line;
}
}
if (current_position.line == 0) {
current_position.column += offset.column;
}
current_position.line += offset.line;
}
void SourceMap::append(const Offset& offset)
{
current_position += offset;
}
void SourceMap::add_open_mapping(const AST_Node_Ptr node)
{
mappings.push_back(Mapping(node->pstate(), current_position));
}
void SourceMap::add_close_mapping(const AST_Node_Ptr node)
{
mappings.push_back(Mapping(node->pstate() + node->pstate().offset, current_position));
}
ParserState SourceMap::remap(const ParserState& pstate) {
for (size_t i = 0; i < mappings.size(); ++i) {
if (
mappings[i].generated_position.file == pstate.file &&
mappings[i].generated_position.line == pstate.line &&
mappings[i].generated_position.column == pstate.column
) return ParserState(pstate.path, pstate.src, mappings[i].original_position, pstate.offset);
}
return ParserState(pstate.path, pstate.src, Position(-1, -1, -1), Offset(0, 0));
}
}
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