43 lines
1.1 KiB
C++
43 lines
1.1 KiB
C++
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/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "layout/layout_selection.h"
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bool IsSubGroupSelection(TextSelection selection) {
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return (selection.from == 0xFFFF) && (selection.to != 0xFFFF);
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}
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bool IsGroupItemSelection(
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TextSelection selection,
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int index) {
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Expects(index >= 0 && index < 0x0F);
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return IsSubGroupSelection(selection) && (selection.to & (1 << index));
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}
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TextSelection AddGroupItemSelection(
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TextSelection selection,
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int index) {
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Expects(index >= 0 && index < 0x0F);
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const auto bit = uint16(1U << index);
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return TextSelection(
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0xFFFF,
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IsSubGroupSelection(selection) ? (selection.to | bit) : bit);
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}
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TextSelection RemoveGroupItemSelection(
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TextSelection selection,
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int index) {
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Expects(index >= 0 && index < 0x0F);
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const auto bit = uint16(1U << index);
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return IsSubGroupSelection(selection)
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? TextSelection(0xFFFF, selection.to & ~bit)
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: selection;
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}
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