| author | wenzelm |
| Sun, 04 Sep 2011 16:37:22 +0200 | |
| changeset 44700 | f4b42f310f86 |
| parent 44203 | 77881904ee91 |
| child 44759 | 9572b6be1aab |
| permissions | -rw-r--r-- |
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
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<html xmlns="http://www.w3.org/1999/xhtml"> |
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<head> |
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/> |
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<style type="text/css" media="screen"> |
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body { font-family: STIXGeneral, IsabelleText; font-size: 14pt; }
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</style> |
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<title>Notes on the Isabelle/jEdit Prover IDE</title> |
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</head> |
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<body> |
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<h2>The Isabelle/jEdit Prover IDE (based on Isabelle/Scala)</h2> |
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The Isabelle/Scala layer that is already part of Isabelle/Pure |
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provides some general infrastructure for advanced prover interaction |
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and integration. The Isabelle/jEdit application serves as an example |
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for asynchronous proof checking with support for parallel processing. |
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<ul> |
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<li>The original jEdit look-and-feel is generally preserved, although |
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some default properties have been changed to accommodate Isabelle |
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(e.g. the text area font).</li> |
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<li>Formal Isabelle/Isar text is checked asynchronously while editing. |
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The user is in full command of the editor, and the prover refrains |
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from locking portions of the buffer etc.</li> |
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<li>Prover feedback works via tooltips, syntax highlighting, colors, |
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boxes etc. based on semantic markup provided by Isabelle in the |
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background.</li> |
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<li>Using the mouse together with the modifier key <tt>C</tt> |
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(<tt>CONTROL</tt> on Linux or Windows, |
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<tt>COMMAND</tt> on Mac OS) exposes additional information.</li> |
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<li>Dockable panels (e.g. <em>Output</em>) are managed as independent |
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windows by jEdit, which also allows multiple instances.</li> |
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</ul> |
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<h2>Isabelle symbols and fonts</h2> |
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<ul> |
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<li>Isabelle supports infinitely many symbols:<br/> |
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α, β, γ, …<br/> |
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∀, ∃, ∨, ∧, ⟶, ⟷, …<br/> |
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≤, ≥, ⊓, ⊔, …<br/> |
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ℵ, △, ∇, …<br/> |
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<tt>\<foo></tt>, <tt>\<bar></tt>, <tt>\<baz></tt>, …<br/> |
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</li> |
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<li>There are some special control symbols to modify the style of a |
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<em>single</em> symbol:<br/> |
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⇩ subscript<br/> |
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⇧ superscript<br/> |
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⇣ subscript within identifier<br/> |
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⇡ superscript within identifier<br/> |
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❙ bold face</li> |
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<li>A default mapping relates some Isabelle symbols to Unicode points |
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(see <tt>$ISABELLE_HOME/etc/symbols</tt> and <tt>$ISABELLE_HOME_USER/etc/symbols</tt>). |
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</li> |
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<li>The <em>IsabelleText</em> font ensures that Unicode points are actually |
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seen on the screen (or printer). |
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</li> |
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<li>Input methods: |
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<ul> |
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<li>copy/paste from decoded source files</li> |
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<li>copy/paste from prover output</li> |
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<li>completion provided by Isabelle plugin, e.g.<br/> |
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<table border="1"> |
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<tr><th><b>name</b></th> <th><b>abbreviation</b></th> <th><b>symbol</b></th></tr> |
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<tr><td>lambda</td> <td><tt>%</tt></td> <td>λ</td></tr> |
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<tr><td>Rightarrow</td> <td><tt>=></tt></td> <td>⇒</td></tr> |
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<tr><td>Longrightarrow</td> <td><tt>==></tt></td> <td>⟹</td></tr> |
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<tr><td>And</td> <td><tt>!!</tt></td> <td>⋀</td></tr> |
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<tr><td>equiv</td> <td><tt>==</tt></td> <td>≡</td></tr> |
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<tr><td>forall</td> <td><tt>!</tt></td> <td>∀</td></tr> |
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<tr><td>exists</td> <td><tt>?</tt></td> <td>∃</td></tr> |
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<tr><td>longrightarrow</td> <td><tt>--></tt></td> <td>⟶</td></tr> |
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<tr><td>and</td> <td><tt>/\</tt></td> <td>∧</td></tr> |
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<tr><td>or</td> <td><tt>\/</tt></td> <td>∨</td></tr> |
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<tr><td>not</td> <td><tt>~ </tt></td> <td>¬</td></tr> |
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<tr><td>noteq</td> <td><tt>~=</tt></td> <td>≠</td></tr> |
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<tr><td>in</td> <td><tt>:</tt></td> <td>∈</td></tr> |
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<tr><td>notin</td> <td><tt>~:</tt></td> <td>∉</td></tr> |
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<tr><td>sub</td> <td><tt>=_</tt></td> <td>⇩</td></tr> |
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<tr><td>sup</td> <td><tt>=^</tt></td> <td>⇧</td></tr> |
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<tr><td>isup</td> <td><tt>-_</tt></td> <td>⇣</td></tr> |
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<tr><td>isub</td> <td><tt>-^</tt></td> <td>⇡</td></tr> |
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<tr><td>bold</td> <td><tt>-.</tt></td> <td>❙</td></tr> |
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</table> |
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</li> |
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</ul> |
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</li> |
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<li><b>NOTE:</b> The above abbreviations refer to the input method. |
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The logical notation provides ASCII alternatives that often |
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coincide, but deviate occasionally. |
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</li> |
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<li><b>NOTE:</b> Generic jEdit abbreviations or plugins perform similar |
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source replacement operations; this works for Isabelle as long |
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as the Unicode sequences coincide with the symbol mapping. |
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</li> |
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</ul> |
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<h2>Limitations and workrounds (September 2011)</h2> |
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<ul> |
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<li>No way to start/stop prover or switch to a different logic.<br/> |
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<em>Workaround:</em> Change options and restart editor.</li> |
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<li>Incremental reparsing sometimes produces unexpected command |
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spans.<br/> |
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<em>Workaround:</em> Cut/paste larger parts or reload buffer.</li> |
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<li>Odd behavior of some diagnostic commands, notably those starting |
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external processes asynchronously (e.g. <tt>thy_deps</tt>).<br/> |
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<em>Workaround:</em> Avoid such commands.</li> |
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<li>Lack of dependency managed for auxiliary files that contribute |
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to a theory ("<b>uses</b>").<br/>
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<em>Workaround:</em> Re-use files manually within the prover.</li> |
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<li>No support for non-local markup, e.g. commands reporting on |
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previous commands (proof end on proof head), or markup produced by |
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loading external files.</li> |
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<li>General lack of various conveniences known from Proof |
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General.</li> |
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</ul> |
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<h2>Known problems with Mac OS</h2> |
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<ul> |
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<li>The MacOSX plugin for jEdit disrupts regular C-X/C/V operations, |
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e.g. between the editor and the Console plugin, which is a standard |
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swing text box. Similar for search boxes etc.</li> |
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<li>ToggleButton selected state is not rendered if window focus is |
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lost, which is probably a genuine feature of the Apple |
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look-and-feel.</li> |
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<li>Font.createFont mangles the font family of non-regular fonts, |
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e.g. bold. IsabelleText font files need to be installed/updated |
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manually.</li> |
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<li>Missing glyphs are collected from other fonts (like Emacs, |
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Firefox). This is actually an advantage over the Oracle/Sun JVM on |
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Windows or Linux, but probably also the deeper reason for the other |
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oddities of Apple font management.</li> |
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<li>The native font renderer of -Dapple.awt.graphics.UseQuartz=true |
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(not enabled by default) fails to handle the infinitesimal font size |
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of "hidden" text (e.g. used in Isabelle sub/superscripts).</li> |
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</ul> |
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<h2>Known problems with OpenJDK 1.6.x</h2> |
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<ul> |
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<li>The 2D rendering engine of OpenJDK 1.6.x distorts the appearance |
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of the jEdit text area. Always use official JRE 1.6.x from |
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Sun/Oracle/Apple.</li> |
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<li>jEdit on OpenJDK is generally not supported.</li> |
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</ul> |
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<h2>Licenses and home sites of contributing systems</h2> |
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<ul> |
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<li>Scala: BSD-style <br/> http://www.scala-lang.org</li> |
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<li>jEdit: GPL (with special cases) <br/> http://www.jedit.org/</li> |
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<li>Lobo/Cobra: GPL and LGPL <br/> http://lobobrowser.org/</li> |
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</ul> |
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</body> |
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</html> |