1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.io;
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3 |
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4 | import org.openstreetmap.josm.gui.progress.NullProgressMonitor;
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5 | import org.openstreetmap.josm.gui.progress.ProgressMonitor;
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6 |
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7 | final class StreamProgressUpdater {
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8 |
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9 | private final long size;
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10 | private final ProgressMonitor progressMonitor;
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11 | private final String taskTitle;
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12 | private int soFar;
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13 | private int lastDialogUpdate;
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14 |
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15 | StreamProgressUpdater(long size, ProgressMonitor progressMonitor, String taskTitle) {
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16 | if (progressMonitor == null) {
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17 | progressMonitor = NullProgressMonitor.INSTANCE;
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18 | }
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19 | this.size = size;
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20 | this.progressMonitor = progressMonitor;
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21 | this.taskTitle = taskTitle;
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22 | initProgressMonitor();
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23 | }
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24 |
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25 | private void initProgressMonitor() {
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26 | if (size > 0) {
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27 | progressMonitor.subTask(taskTitle);
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28 | progressMonitor.setTicksCount((int) size);
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29 | } else {
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30 | progressMonitor.indeterminateSubTask(taskTitle);
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31 | }
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32 | }
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33 |
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34 | /**
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35 | * Increase ticker (progress counter and displayed text) by the given amount.
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36 | *
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37 | * @param amount number of ticks
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38 | */
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39 | void advanceTicker(int amount) {
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40 | soFar += amount;
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41 |
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42 | if (soFar / 1024 != lastDialogUpdate) {
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43 | lastDialogUpdate++;
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44 | if (size > 0) {
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45 | progressMonitor.setTicks(soFar);
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46 | }
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47 | progressMonitor.setExtraText(soFar / 1024 + " KB");
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48 | }
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49 | }
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50 |
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51 | void finishTask() {
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52 | progressMonitor.finishTask();
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53 | }
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54 | }
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