start integrating assembly text editor

CMakeLists.txt

@@ -12,6 +12,7 @@ add_definitions(-D_CRT_SECURE_NO_WARNINGS)
 fips_setup()
 fips_import_fips_imgui_imgui()
 fips_add_subdirectory(ext/perfect6502)
+fips_add_subdirectory(ext/texteditor)
 fips_add_subdirectory(src)
 fips_finish()
 

ext/texteditor/CMakeLists.txt

@@ -0,0 +1,6 @@
+fips_begin_lib(texteditor)
+    fips_vs_warning_level(3)
+    fips_files(TextEditor.cpp TextEditor.h)
+fips_end_lib()
+target_include_directories(texteditor INTERFACE .)
+

ext/texteditor/CONTRIBUTING

@@ -0,0 +1,11 @@
+# Contributing
+Pull requests are welcome, feel free to contribute if you have implemented something which might be useful for the general audience of this little piece of software. Apparently, it became kind of a community project now. :)
+
+Whem contributing, please follow the following guidelines. I will keep it updated as we bump into something which worth doing better.
+- Try to follow the same coding and naming conventions you find in the source already. I know that everyone has its own preference/taste in coding, but please keep the source consistent in style.
+- Please submit to the 'dev' branch first for testing, and it will be merged to 'main' if it seems to work fine. I would like try keep 'master' in a good working condition, as more and more people are using it.
+- Please send your submissions in small, well defined requests, i. e. do not accumulate many unrelated changes in one large pull request. Keep your submissions as small as possible, it will make everyone's life easier.
+- Avoid using ImGui internal since it would make the source fragile against internal changes in ImGui.
+- Try to keep the perormance high within the render function. Try to avoid doing anything which leads to memory allocations (like using temporary std::string, std::vector variables), or complex algorithm. If you really have to, try to amortise it between frames.
+
+Thank you. :)

ext/texteditor/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2017 BalazsJako
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

ext/texteditor/README.md

@@ -0,0 +1,33 @@
+# ImGuiColorTextEdit
+Syntax highlighting text editor for ImGui
+
+![Screenshot](https://github.com/BalazsJako/ImGuiColorTextEdit/wiki/ImGuiTextEdit.png "Screenshot")
+
+Demo project: https://github.com/BalazsJako/ColorTextEditorDemo
+
+This started as my attempt to write a relatively simple widget which provides text editing functionality with syntax highlighting. Now there are other contributors who provide valuable additions.
+
+While it relies on Omar Cornut's https://github.com/ocornut/imgui, it does not follow the "pure" one widget - one function approach. Since the editor has to maintain a relatively complex and large internal state, it did not seem to be practical to try and enforce fully immediate mode. It stores its internal state in an object instance which is reused across frames.
+
+The code is (still) work in progress, please report if you find any issues.
+
+# Main features
+ - approximates typical code editor look and feel (essential mouse/keyboard commands work - I mean, the commands _I_ normally use :))
+ - undo/redo
+ - UTF-8 support
+ - works with both fixed and variable-width fonts
+ - extensible syntax highlighting for multiple languages
+ - identifier declarations: a small piece of description can be associated with an identifier. The editor displays it in a tooltip when the mouse cursor is hovered over the identifier
+ - error markers: the user can specify a list of error messages together the line of occurence, the editor will highligh the lines with red backround and display error message in a tooltip when the mouse cursor is hovered over the line
+ - large files: there is no explicit limit set on file size or number of lines (below 2GB, performance is not affected when large files are loaded (except syntax coloring, see below)
+ - color palette support: you can switch between different color palettes, or even define your own
+ - whitespace indicators (TAB, space)
+
+# Known issues
+ - syntax highligthing of most languages - except C/C++ - is based on std::regex, which is diasppointingly slow. Because of that, the highlighting process is amortized between multiple frames. C/C++ has a hand-written tokenizer which is much faster. 
+
+Please post your screenshots if you find this little piece of software useful. :)
+
+# Contribute
+
+If you want to contribute, please refer to CONTRIBUTE file.