1 | // License: GPL. See LICENSE file for details.
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2 | package org.openstreetmap.josm.actions.mapmode;
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3 |
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4 | /**
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5 | * TODO: rewrite to use awt modifers flag instead.
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6 | *
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7 | * @author Ole Jørgen Brønner (olejorgenb)
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8 | */
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9 | public class ModifiersSpec {
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10 | static public final int ON = 1, OFF = 0, UNKNOWN = 2;
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11 | public int alt = UNKNOWN;
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12 | public int shift = UNKNOWN;
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13 | public int ctrl = UNKNOWN;
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14 |
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15 | /**
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16 | * 'A' = Alt, 'S' = Shift, 'C' = Ctrl
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17 | * Lowercase signifies off and '?' means unknown/optional.
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18 | * Order is Alt, Shift, Ctrl
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19 | * @param str
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20 | */
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21 | public ModifiersSpec(String str) {
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22 | assert (str.length() == 3);
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23 | char a = str.charAt(0);
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24 | char s = str.charAt(1);
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25 | char c = str.charAt(2);
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26 | // @formatter:off
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27 | alt = (a == '?' ? UNKNOWN : (a == 'A' ? ON : OFF));
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28 | shift = (s == '?' ? UNKNOWN : (s == 'S' ? ON : OFF));
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29 | ctrl = (c == '?' ? UNKNOWN : (c == 'C' ? ON : OFF));
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30 | // @formatter:on
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31 | }
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32 |
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33 | public ModifiersSpec(final int alt, final int shift, final int ctrl) {
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34 | this.alt = alt;
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35 | this.shift = shift;
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36 | this.ctrl = ctrl;
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37 | }
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38 |
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39 | public boolean matchWithKnown(final int knownAlt, final int knownShift, final int knownCtrl) {
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40 | return match(alt, knownAlt) && match(shift, knownShift) && match(ctrl, knownCtrl);
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41 | }
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42 |
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43 | public boolean matchWithKnown(final boolean knownAlt, final boolean knownShift, final boolean knownCtrl) {
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44 | return match(alt, knownAlt) && match(shift, knownShift) && match(ctrl, knownCtrl);
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45 | }
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46 |
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47 | private boolean match(final int a, final int knownValue) {
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48 | assert (knownValue == ON | knownValue == OFF);
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49 | return a == knownValue || a == UNKNOWN;
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50 | }
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51 |
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52 | private boolean match(final int a, final boolean knownValue) {
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53 | return a == (knownValue ? ON : OFF) || a == UNKNOWN;
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54 | }
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55 | // does java have built in 3-state support?
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56 | }
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