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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "sandbox/win/src/line_break_policy.h"
#include <algorithm>
#include <array>
#include <usp10.h>
#include "sandbox/win/src/ipc_tags.h"
#include "sandbox/win/src/line_break_common.h"
#include "sandbox/win/src/policy_engine_opcodes.h"
#include "sandbox/win/src/policy_params.h"
namespace sandbox {
bool LineBreakPolicy::GenerateRules(const wchar_t* null,
TargetPolicy::Semantics semantics,
LowLevelPolicy* policy) {
if (TargetPolicy::LINE_BREAK_ALLOW != semantics) {
return false;
}
PolicyRule line_break_rule(ASK_BROKER);
if (!policy->AddRule(IpcTag::GETCOMPLEXLINEBREAKS, &line_break_rule)) {
return false;
}
return true;
}
/* static */ DWORD LineBreakPolicy::GetComplexLineBreaksProxyAction(
EvalResult eval_result, const wchar_t* text, uint32_t length,
uint8_t* break_before) {
// The only action supported is ASK_BROKER which means call the line breaker.
if (ASK_BROKER != eval_result) {
return ERROR_ACCESS_DENIED;
}
int outItems = 0;
std::array<SCRIPT_ITEM, kMaxBrokeredLen + 1> items;
HRESULT result = ::ScriptItemize(text, length, kMaxBrokeredLen, nullptr,
nullptr, items.data(), &outItems);
if (result != 0) {
return ERROR_ACCESS_DENIED;
}
std::array<SCRIPT_LOGATTR, kMaxBrokeredLen> slas;
for (int iItem = 0; iItem < outItems; ++iItem) {
uint32_t endOffset = items[iItem + 1].iCharPos;
uint32_t startOffset = items[iItem].iCharPos;
if (FAILED(::ScriptBreak(text + startOffset, endOffset - startOffset,
&items[iItem].a, &slas[startOffset]))) {
return ERROR_ACCESS_DENIED;
}
}
std::transform(slas.data(), slas.data() + length, break_before,
[](const SCRIPT_LOGATTR& sla) { return sla.fSoftBreak; });
return ERROR_SUCCESS;
}
} // namespace sandbox
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