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// Copyright 2024 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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#include "src/tint/lang/wgsl/ls/server.h"
#include "src/tint/lang/wgsl/reader/reader.h"
namespace lsp = langsvr::lsp;
namespace tint::wgsl::ls {
namespace {
/// @returns the byte offsets of the start of all the lines in @p str.
std::vector<size_t> LineOffsets(std::string_view str) {
std::vector<size_t> offsets;
offsets.push_back(0);
for (size_t i = 0, n = str.length(); i < n; i++) {
if (str[i] == '\n') {
offsets.push_back(i + 1);
}
}
return offsets;
}
} // namespace
langsvr::Result<langsvr::SuccessType> Server::Handle(
const lsp::TextDocumentDidOpenNotification& n) {
wgsl::reader::Options options;
options.allowed_features = wgsl::AllowedFeatures::Everything();
auto source = std::make_unique<Source::File>(n.text_document.uri, n.text_document.text);
auto program = wgsl::reader::Parse(source.get(), options);
auto file =
std::make_shared<File>(std::move(source), n.text_document.version, std::move(program));
files_.Add(n.text_document.uri, file);
return PublishDiagnostics(*file);
}
langsvr::Result<langsvr::SuccessType> Server::Handle(
const lsp::TextDocumentDidCloseNotification& n) {
files_.Remove(n.text_document.uri);
return langsvr::Success;
}
langsvr::Result<langsvr::SuccessType> Server::Handle(
const lsp::TextDocumentDidChangeNotification& n) {
auto file = files_.Get(n.text_document.uri);
if (!file) {
return langsvr::Failure{"document not found"};
}
auto utf8 = (*file)->source->content.data;
for (auto& change : n.content_changes) {
if (auto* edit = change.Get<lsp::TextDocumentContentChangePartial>()) {
auto range = (*file)->Conv(edit->range);
std::vector<size_t> line_offsets = LineOffsets(utf8);
size_t utf8_start = line_offsets[range.begin.line - 1] + range.begin.column - 1;
size_t utf8_end = line_offsets[range.end.line - 1] + range.end.column - 1;
utf8 = utf8.substr(0, utf8_start) + edit->text + utf8.substr(utf8_end);
}
}
wgsl::reader::Options options;
options.allowed_features = wgsl::AllowedFeatures::Everything();
auto source = std::make_unique<Source::File>(n.text_document.uri, utf8);
auto program = wgsl::reader::Parse(source.get(), options);
*file = std::make_shared<File>(std::move(source), n.text_document.version, std::move(program));
return PublishDiagnostics(**file);
}
} // namespace tint::wgsl::ls