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125 lines
4.7 KiB
C#
125 lines
4.7 KiB
C#
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/*
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* Copyright 2018 faddenSoft
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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using System;
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using System.Collections.Generic;
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using System.ComponentModel;
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using System.Diagnostics;
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using System.Windows.Forms;
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namespace SourceGen.AsmGen {
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/// <summary>
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/// Dialog that shows the progress of the assembler, and allows cancellation.
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/// </summary>
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public partial class AssemblerProgress : Form {
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/// <summary>
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/// On success, assembler results will be here.
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/// </summary>
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public AssemblerResults Results { get; private set; }
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/// <summary>
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/// Assembler executor.
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/// </summary>
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private IAssembler mAssembler;
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/// <summary>
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/// Constructor.
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/// </summary>
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/// <param name="gen">Fully-configured source generator.</param>
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public AssemblerProgress(IAssembler asm) {
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InitializeComponent();
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mAssembler = asm;
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}
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private void AssemblerProgress_Load(object sender, EventArgs e) {
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backgroundWorker1.RunWorkerAsync();
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}
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private void cancelButton_Click(object sender, EventArgs e) {
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backgroundWorker1.CancelAsync();
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cancelButton.Enabled = false;
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// We don't have a polite way to ask a shell command to stop, so we should
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// kill the process here. Need to figure out how to do that. We don't need
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// to clean up partial output.
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}
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private void AssemblerProgress_FormClosing(object sender, FormClosingEventArgs e) {
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// Strictly speaking, we should treat this as a cancel request, and set
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// e.Cancel = true to prevent the form from closing until the assembler stops.
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// However, we don't currently kill runaway processes, which would leave the
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// user with no way to close the dialog, potentially requiring them to kill the
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// entire app with unsaved work. Better to abandon the runaway process.
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//
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// We call CancelAsync so that the results are discarded should the worker
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// eventually finish.
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if (backgroundWorker1.IsBusy) {
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backgroundWorker1.CancelAsync();
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DialogResult = DialogResult.Cancel;
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}
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}
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// NOTE: executes on work thread. DO NOT do any UI work here. DO NOT access
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// the Results property directly.
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private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) {
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BackgroundWorker worker = sender as BackgroundWorker;
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AssemblerResults results = mAssembler.RunAssembler(worker);
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if (worker.CancellationPending) {
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e.Cancel = true;
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} else {
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e.Result = results;
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}
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}
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// Callback that fires when a progress update is made.
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private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e) {
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int percent = e.ProgressPercentage;
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string msg = e.UserState as string;
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Debug.Assert(percent >= 0 && percent <= 100);
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if (!string.IsNullOrEmpty(msg)) {
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progressLabel.Text = msg;
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}
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progressBar1.Value = percent;
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}
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// Callback that fires when execution completes.
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private void backgroundWorker1_RunWorkerCompleted(object sender,
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RunWorkerCompletedEventArgs e) {
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if (e.Cancelled) {
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Debug.WriteLine("CANCELED");
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DialogResult = DialogResult.Cancel;
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} else if (e.Error != null) {
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// Unexpected -- shell command execution shouldn't throw exceptions.
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MessageBox.Show(e.Error.ToString(), Properties.Resources.OPERATION_FAILED,
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MessageBoxButtons.OK, MessageBoxIcon.Error);
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DialogResult = DialogResult.Cancel;
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} else {
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// Make results available in properties.
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Results = e.Result as AssemblerResults;
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Debug.WriteLine("Asm complete, exit=" + Results.ExitCode);
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DialogResult = DialogResult.OK;
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}
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// Whatever the case, we're done.
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this.Close();
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}
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}
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}
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