mirror of
https://github.com/fadden/6502bench.git
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559 lines
24 KiB
C#
559 lines
24 KiB
C#
/*
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* Copyright 2019 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.ComponentModel;
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using System.Diagnostics;
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using System.Runtime.CompilerServices;
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using System.Text;
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using System.Windows;
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using System.Windows.Controls;
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using Asm65;
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namespace SourceGen.WpfGui {
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/// <summary>
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/// Instruction operand editor.
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///
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/// This is a pretty direct port from WinForms.
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/// </summary>
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public partial class EditInstructionOperand : Window {
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/// <summary>
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/// In/out. May be null on entry if the offset doesn't have a format descriptor
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/// specified. Will be null on exit if "default" is selected.
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/// </summary>
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public FormatDescriptor FormatDescriptor { get; set; }
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public enum SymbolShortcutAction {
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None = 0, CreateLabelInstead, CreateLabelAlso, CreateProjectSymbolAlso
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}
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/// <summary>
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/// Remember the last option we used.
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/// </summary>
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private static SymbolShortcutAction sLastAction = SymbolShortcutAction.None;
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/// <summary>
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/// On OK dialog exit, specifies that an additional action should be taken.
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/// </summary>
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public SymbolShortcutAction ShortcutAction { get; private set; }
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/// <summary>
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/// Additional argument, meaning dependent on ShortcutAction. This will either be
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/// the target label offset or the project symbol value.
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/// </summary>
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public int ShortcutArg { get; private set; }
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/// <summary>
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/// Width of full instruction, including opcode.
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/// </summary>
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private int mInstructionLength;
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/// <summary>
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/// Number of hexadecimal digits to show in the preview. Sometimes you want
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/// to force this to be longer or shorter than InstructionLength would indicate,
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/// e.g. "BRA $1000" has a 1-byte operand.
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/// </summary>
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private int mPreviewHexDigits;
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/// <summary>
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/// Operand value, extracted from file data. For a relative branch, this will be
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/// an address instead. Only used for preview window.
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/// </summary>
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private int mOperandValue;
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/// <summary>
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/// Is the operand an immediate value? If so, we enable the symbol part selection.
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/// </summary>
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private bool mIsExtendedImmediate;
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/// <summary>
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/// Is the operand a PC relative offset?
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/// </summary>
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private bool mIsPcRelative;
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/// <summary>
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/// Special handling for block move instructions (MVN/MVP).
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/// </summary>
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private bool mIsBlockMove;
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/// <summary>
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/// If set, show a '#' in the preview indow.
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/// </summary>
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private bool mShowHashPrefix;
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///// <summary>
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///// Symbol table to use when resolving symbolic values.
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///// </summary>
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//private SymbolTable SymbolTable { get; set; }
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/// <summary>
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/// Project reference.
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/// </summary>
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private DisasmProject mProject;
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/// <summary>
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/// Formatter to use when displaying addresses and hex values.
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/// </summary>
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private Formatter mFormatter;
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/// <summary>
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/// Copy of operand Anattribs.
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/// </summary>
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private Anattrib mAttr;
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/// <summary>
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/// Set this during initial control configuration, so we know to ignore the CheckedChanged
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/// events.
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/// </summary>
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private bool mIsInitialSetup;
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/// <summary>
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/// Set to true if the user has entered a symbol that matches an auto-generated symbol.
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/// </summary>
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private bool mIsSymbolAuto;
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public EditInstructionOperand(Window owner, int offset, DisasmProject project,
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Asm65.Formatter formatter) {
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InitializeComponent();
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Owner = owner;
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DataContext = this;
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mProject = project;
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mFormatter = formatter;
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// Configure the appearance.
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mAttr = mProject.GetAnattrib(offset);
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OpDef op = mProject.CpuDef.GetOpDef(mProject.FileData[offset]);
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mInstructionLength = mAttr.Length;
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mPreviewHexDigits = (mAttr.Length - 1) * 2;
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if (mAttr.OperandAddress >= 0) {
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// Use this as the operand value when available. This lets us present
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// relative branch instructions in the expected form.
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mOperandValue = mAttr.OperandAddress;
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if (op.AddrMode == OpDef.AddressMode.PCRel) {
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mPreviewHexDigits = 4;
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mIsPcRelative = true;
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} else if (op.AddrMode == OpDef.AddressMode.PCRelLong ||
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op.AddrMode == OpDef.AddressMode.StackPCRelLong) {
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mIsPcRelative = true;
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}
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} else {
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int opVal = op.GetOperand(mProject.FileData, offset, mAttr.StatusFlags);
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mOperandValue = opVal;
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if (op.AddrMode == OpDef.AddressMode.BlockMove) {
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// MVN and MVP screw things up by having two operands in one instruction.
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// We deal with this by passing in the value from the second byte
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// (source bank) as the value, and applying the chosen format to both bytes.
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mIsBlockMove = true;
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mOperandValue = opVal >> 8;
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mPreviewHexDigits = 2;
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}
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}
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mIsExtendedImmediate = op.IsExtendedImmediate; // Imm, PEA, MVN/MVP
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mShowHashPrefix = op.IsImmediate; // just Imm
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}
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private void Window_Loaded(object sender, RoutedEventArgs e) {
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mIsInitialSetup = true;
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// Can this be represented as high or low ASCII?
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asciiButton.IsEnabled = CommonUtil.TextUtil.IsHiLoAscii(mOperandValue);
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// Configure the dialog from the FormatDescriptor, if one is available.
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SetControlsFromDescriptor(FormatDescriptor);
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// Do this whether or not symbol is checked -- want to have this set when the
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// dialog is initially in default format.
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switch (sLastAction) {
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case SymbolShortcutAction.CreateLabelInstead:
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labelInsteadButton.IsChecked = true;
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break;
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case SymbolShortcutAction.CreateLabelAlso:
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operandAndLabelButton.IsChecked = true;
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break;
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case SymbolShortcutAction.CreateProjectSymbolAlso:
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operandAndProjButton.IsChecked = true;
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break;
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default:
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operandOnlyButton.IsChecked = true;
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break;
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}
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mIsInitialSetup = false;
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UpdateControls();
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}
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private void Window_ContentRendered(object sender, EventArgs e) {
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// Start with the focus in the text box. This way they can start typing
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// immediately.
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symbolTextBox.Focus();
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}
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private void SymbolTextBox_TextChanged(object sender, TextChangedEventArgs e) {
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// Make sure Symbol is checked if they're typing text in.
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symbolButton.IsChecked = true;
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UpdateControls();
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}
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/// <summary>
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/// Handles Checked/Unchecked events for all radio buttons in main group.
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/// </summary>
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private void MainGroup_CheckedChanged(object sender, RoutedEventArgs e) {
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// Enable/disable the low/high/bank radio group.
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// Update preview window.
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UpdateControls();
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}
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/// <summary>
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/// Handles Checked/Unchecked events for all radio buttons in symbol-part group.
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/// </summary>
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private void PartGroup_CheckedChanged(object sender, RoutedEventArgs e) {
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// Update preview window.
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UpdateControls();
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}
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private void OkButton_Click(object sender, RoutedEventArgs e) {
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FormatDescriptor = CreateDescriptorFromControls();
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//
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// Extract the current shortcut action. For dialog configuration purposes we
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// want to capture the current state. For the caller, we force it to "none"
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// if we're not using a symbol format.
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//
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SymbolShortcutAction action = SymbolShortcutAction.None;
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if (labelInsteadButton.IsChecked == true) {
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action = SymbolShortcutAction.CreateLabelInstead;
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} else if (operandAndLabelButton.IsChecked == true) {
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action = SymbolShortcutAction.CreateLabelAlso;
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} else if (operandAndProjButton.IsChecked == true) {
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action = SymbolShortcutAction.CreateProjectSymbolAlso;
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} else if (operandOnlyButton.IsChecked == true) {
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action = SymbolShortcutAction.None;
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} else {
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Debug.Assert(false);
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action = SymbolShortcutAction.None;
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}
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sLastAction = action;
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if (symbolButton.IsChecked == true && FormatDescriptor != null) {
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// Only report a shortcut action if they've entered a symbol. If they
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// checked symbol but left the field blank, they're just trying to delete
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// the format.
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ShortcutAction = action;
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} else {
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ShortcutAction = SymbolShortcutAction.None;
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}
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DialogResult = true;
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}
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/// <summary>
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/// Updates all of the controls to reflect the current internal state.
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/// </summary>
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private void UpdateControls() {
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if (mIsInitialSetup) {
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return;
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}
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symbolPartPanel.IsEnabled = (symbolButton.IsChecked == true && mIsExtendedImmediate);
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symbolShortcutsGroupBox.IsEnabled = symbolButton.IsChecked == true;
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SetPreviewText();
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bool isOk = true;
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if (symbolButton.IsChecked == true) {
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// Just check for correct format. References to non-existent labels are allowed.
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//
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// We try to block references to auto labels, but it's possible to get around it
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// (replace auto label with user label, reference non-existent auto label,
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// remove user label). We could try harder, but currently not necessary.
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isOk = !mIsSymbolAuto && Asm65.Label.ValidateLabel(symbolTextBox.Text);
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// Allow empty strings as a way to delete the label and return to "default".
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if (string.IsNullOrEmpty(symbolTextBox.Text)) {
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isOk = true;
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}
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ConfigureSymbolShortcuts();
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}
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okButton.IsEnabled = isOk;
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}
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/// <summary>
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/// Sets the text displayed in the "preview" text box.
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/// </summary>
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private void SetPreviewText() {
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//symbolValueLabel.Text = string.Empty;
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mIsSymbolAuto = false;
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FormatDescriptor dfd = CreateDescriptorFromControls();
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if (dfd == null) {
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// Default format. We can't actually know what this look like, so just
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// clear the box.
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previewTextBox.Text = string.Empty;
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return;
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}
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if (dfd.FormatSubType == FormatDescriptor.SubType.Symbol &&
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string.IsNullOrEmpty(dfd.SymbolRef.Label)) {
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// no label yet, nothing to show
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previewTextBox.Text = string.Empty;
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return;
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}
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StringBuilder preview = new StringBuilder();
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if (mShowHashPrefix) {
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preview.Append('#');
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}
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switch (dfd.FormatSubType) {
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case FormatDescriptor.SubType.Hex:
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preview.Append(mFormatter.FormatHexValue(mOperandValue, mPreviewHexDigits));
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break;
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case FormatDescriptor.SubType.Decimal:
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preview.Append(mFormatter.FormatDecimalValue(mOperandValue));
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break;
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case FormatDescriptor.SubType.Binary:
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preview.Append(mFormatter.FormatBinaryValue(mOperandValue, 8));
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break;
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case FormatDescriptor.SubType.Ascii:
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preview.Append(mFormatter.FormatAsciiOrHex(mOperandValue));
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break;
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case FormatDescriptor.SubType.Symbol:
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if (mProject.SymbolTable.TryGetValue(dfd.SymbolRef.Label, out Symbol sym)) {
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if (mIsBlockMove) {
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// For a 24-bit symbol, we grab the high byte. This is the
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// expected behavior, according to Eyes & Lichty; see the
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// explanation of the MVP instruction. For an 8-bit symbol
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// the assembler just takes the value.
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// TODO(someday): allow a different symbol for each part of the
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// operand.
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if (sym.Value > 0xff) {
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bankButton.IsChecked = true;
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} else {
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lowButton.IsChecked = true;
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}
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dfd = CreateDescriptorFromControls();
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}
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// Hack to make relative branches look right in the preview window.
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// Otherwise they show up like "<LABEL" because they appear to be
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// only 8 bits.
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int operandLen = dfd.Length - 1;
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if (operandLen == 1 && mIsPcRelative) {
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operandLen = 2;
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}
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PseudoOp.FormatNumericOpFlags flags;
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if (mIsPcRelative) {
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flags = PseudoOp.FormatNumericOpFlags.IsPcRel;
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} else if (mShowHashPrefix) {
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flags = PseudoOp.FormatNumericOpFlags.HasHashPrefix;
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} else {
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flags = PseudoOp.FormatNumericOpFlags.None;
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}
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string str = PseudoOp.FormatNumericOperand(mFormatter,
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mProject.SymbolTable, null, dfd,
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mOperandValue, operandLen, flags);
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preview.Append(str);
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if (sym.SymbolSource == Symbol.Source.Auto) {
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mIsSymbolAuto = true;
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}
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} else {
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preview.Append(dfd.SymbolRef.Label + " (?)");
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Debug.Assert(!string.IsNullOrEmpty(dfd.SymbolRef.Label));
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//symbolValueLabel.Text = Properties.Resources.MSG_SYMBOL_NOT_FOUND;
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}
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break;
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default:
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Debug.Assert(false);
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preview.Append("BUG");
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break;
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}
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previewTextBox.Text = preview.ToString();
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}
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/// <summary>
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/// Configures the buttons in the "symbol shortcuts" group box. The entire box is
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/// disabled unless "symbol" is selected. Other options are selectively enabled or
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/// disabled as appropriate for the current input. If we disable the selection option,
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/// the selection will be reset to default.
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/// </summary>
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private void ConfigureSymbolShortcuts() {
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// operandOnlyRadioButton: always enabled
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// labelInsteadRadioButton: symbol is unknown and operand address has no label
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// operandAndLabelRadioButton: same as labelInstead
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// operandAndProjRadioButton: symbol is unknown and operand address is outside project
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string labelStr = symbolTextBox.Text;
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ShortcutArg = -1;
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// Is this a known symbol? If so, disable most options and bail.
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if (mProject.SymbolTable.TryGetValue(labelStr, out Symbol sym)) {
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labelInsteadButton.IsEnabled = operandAndLabelButton.IsEnabled =
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operandAndProjButton.IsEnabled = false;
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operandOnlyButton.IsChecked = true;
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return;
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}
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if (mAttr.OperandOffset >= 0) {
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// Operand target is inside the file. Does the target offset already have a label?
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int targetOffset =
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DataAnalysis.GetBaseOperandOffset(mProject, mAttr.OperandOffset);
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bool hasLabel = mProject.UserLabels.ContainsKey(targetOffset);
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labelInsteadButton.IsEnabled = operandAndLabelButton.IsEnabled =
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!hasLabel;
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operandAndProjButton.IsEnabled = false;
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ShortcutArg = targetOffset;
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} else if (mAttr.OperandAddress >= 0) {
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// Operand target is outside the file.
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labelInsteadButton.IsEnabled = operandAndLabelButton.IsEnabled = false;
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operandAndProjButton.IsEnabled = true;
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ShortcutArg = mAttr.OperandAddress;
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} else {
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// Probably an immediate operand.
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// ?? Should operandAndProjButton be enabled for 8-bit constants? We'd want
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// to add it as a constant rather than an address.
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labelInsteadButton.IsEnabled = operandAndLabelButton.IsEnabled =
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operandAndProjButton.IsEnabled = false;
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}
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// Select the default option if the currently-selected option is no longer available.
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if ((labelInsteadButton.IsChecked == true && labelInsteadButton.IsEnabled != true) ||
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(operandAndLabelButton.IsChecked == true && !operandAndLabelButton.IsEnabled == true) ||
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(operandAndProjButton.IsChecked == true && !operandAndProjButton.IsEnabled == true)) {
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operandOnlyButton.IsChecked = true;
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}
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}
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/// <summary>
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/// Configures the dialog controls based on the provided format descriptor.
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/// </summary>
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/// <param name="dfd">FormatDescriptor to use.</param>
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private void SetControlsFromDescriptor(FormatDescriptor dfd) {
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Debug.Assert(mIsInitialSetup);
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lowButton.IsChecked = true;
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if (dfd == null) {
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defaultButton.IsChecked = true;
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return;
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}
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// NOTE: it's entirely possible to have a weird format (e.g. string) if the
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// instruction used to be hinted as data. Handle it gracefully.
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switch (dfd.FormatType) {
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case FormatDescriptor.Type.NumericLE:
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switch (dfd.FormatSubType) {
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case FormatDescriptor.SubType.Hex:
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hexButton.IsChecked = true;
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break;
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case FormatDescriptor.SubType.Decimal:
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decimalButton.IsChecked = true;
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break;
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case FormatDescriptor.SubType.Binary:
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binaryButton.IsChecked = true;
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break;
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case FormatDescriptor.SubType.Ascii:
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asciiButton.IsChecked = true;
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break;
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case FormatDescriptor.SubType.Symbol:
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Debug.Assert(dfd.HasSymbol);
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symbolButton.IsChecked = true;
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switch (dfd.SymbolRef.ValuePart) {
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case WeakSymbolRef.Part.Low:
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lowButton.IsChecked = true;
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break;
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case WeakSymbolRef.Part.High:
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highButton.IsChecked = true;
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break;
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case WeakSymbolRef.Part.Bank:
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bankButton.IsChecked = true;
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break;
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default:
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Debug.Assert(false);
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break;
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}
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symbolTextBox.Text = dfd.SymbolRef.Label;
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break;
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case FormatDescriptor.SubType.None:
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default:
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// Unexpected; call it hex.
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hexButton.IsChecked = true;
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break;
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}
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break;
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case FormatDescriptor.Type.NumericBE:
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case FormatDescriptor.Type.String:
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case FormatDescriptor.Type.Fill:
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default:
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// Unexpected; used to be data?
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defaultButton.IsChecked = true;
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break;
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}
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}
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/// <summary>
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/// Creates a FormatDescriptor from the current state of the dialog controls.
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/// </summary>
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/// <returns>New FormatDescriptor.</returns>
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private FormatDescriptor CreateDescriptorFromControls() {
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if (symbolButton.IsChecked == true) {
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if (string.IsNullOrEmpty(symbolTextBox.Text)) {
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// empty symbol --> default format (intuitive way to delete label reference)
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return null;
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}
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WeakSymbolRef.Part part;
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if (lowButton.IsChecked == true) {
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part = WeakSymbolRef.Part.Low;
|
|
} else if (highButton.IsChecked == true) {
|
|
part = WeakSymbolRef.Part.High;
|
|
} else if (bankButton.IsChecked == true) {
|
|
part = WeakSymbolRef.Part.Bank;
|
|
} else {
|
|
Debug.Assert(false);
|
|
part = WeakSymbolRef.Part.Low;
|
|
}
|
|
return FormatDescriptor.Create(mInstructionLength,
|
|
new WeakSymbolRef(symbolTextBox.Text, part), false);
|
|
}
|
|
|
|
FormatDescriptor.SubType subType;
|
|
if (defaultButton.IsChecked == true) {
|
|
return null;
|
|
} else if (hexButton.IsChecked == true) {
|
|
subType = FormatDescriptor.SubType.Hex;
|
|
} else if (decimalButton.IsChecked == true) {
|
|
subType = FormatDescriptor.SubType.Decimal;
|
|
} else if (binaryButton.IsChecked == true) {
|
|
subType = FormatDescriptor.SubType.Binary;
|
|
} else if (asciiButton.IsChecked == true) {
|
|
subType = FormatDescriptor.SubType.Ascii;
|
|
} else if (symbolButton.IsChecked == true) {
|
|
subType = FormatDescriptor.SubType.Symbol;
|
|
} else {
|
|
Debug.Assert(false);
|
|
subType = FormatDescriptor.SubType.None;
|
|
}
|
|
|
|
return FormatDescriptor.Create(mInstructionLength,
|
|
FormatDescriptor.Type.NumericLE, subType);
|
|
}
|
|
}
|
|
}
|