spiegel-keyman/web/README.md

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# Keyman Engine for Web
The Original Code is (C) SIL International
## Prerequisites
See [build configuration](../docs/build/index.md) for details on how to
configure your build environment.
**********************************************************************
The following folders contain the distribution for Keyman Engine for Web:
src Source code
build/app/resources OSK + UI resources for inclusion in all build types;
keymanweb-osk.ttf is maintained at https://github.com/silnrsi/font-keymanweb-osk
build/app/browser/release Fully-compiled KeymanWeb modules for release
build/app/webview/release Fully-compiled KMEA/KMEI modules for inclusion in mobile app builds
build/app/browser/debug Fully-compiled but non-minified KeymanWeb modules
build/app/webview/debug Fully-compiled but non-minified KMEA/KMEI modules
src/samples Sample pages demonstrating ways to link with KeymanWeb
src/test/manual Test-case web-pages for various aspects of KeymanWeb functionality
src/test/auto A Node-driven test suite for automated testing of KeymanWeb
**********************************************************************
## Usage
Open **index.html** or **samples/index.html** in your browser. Be sure to
compile Keyman Engine for Web before viewing the pages.
Refer to the samples for usage details.
To view pages using compiled Keyman Engine for Web,
1. cd to **keyman/web/**
2. Run `./build.sh`
- Use `./build.sh --help` for the script's documentation.
### Unit Testing ###
Before running unit tests on Keyman Engine for Web, first run `./build.sh`
according to the instructions above.
Once the build is complete, running `npm test` will run the unit testing suite
on your local machine in-browser. Alternatively, see `test.sh`, which
the former command executes.
### Debugging Unit Tests
1. During development, to run a specific unit test, change the `it` to
`it.only`. You can also run all tests under a specific group with
`describe.only`.
2. From this directory, run `./test.sh --debug`. Alternatively, from
`web/` or any `web/` subdirectory,
```
npm run test -- --debug
```
The `--` part tells `npm` to funnel anything to the script as the script's
command-line parameters. As long as it's run from somewhere within the `web/`
folder's hierarchy, that line will always run from `web/`, as that's where
`package.json` is.
3. When the browser halts, click the "Debug" button which opens a new debugging
tab.
4. In the Dev console, you can set a breakpoint in your test and refresh the
page to debug
### Approximate Overall Design
```mermaid
graph TD;
OSK[web/src/engine/osk];
KP["common/web/keyboard-processor"];
IP["common/web/input-processor"];
OSK-->KP;
IP-->KP;
Utils["common/web/utils"];
KP---->Utils;
Wordbreakers["common/models/wordbreakers"];
Models["common/models/templates"];
Models-->Utils;
LMWorker["common/web/lm-worker"];
LMWorker-->Models;
LMWorker-->Wordbreakers;
LMLayer["common/predictive-text"];
LMLayer-->LMWorker;
IP-->LMLayer;
subgraph PredText["WebWorker + its interface"]
LMLayer;
LMWorker;
Models;
Wordbreakers;
end
subgraph Headless["Fully headless components"]
direction LR
KP;
IP;
Utils;
PredText;
end
subgraph ClassicWeb["Previously unmodularized components"]
Device[web/src/engine/device-detect];
Device----->Utils;
Elements[web/src/engine/element-wrappers];
Elements-->KP;
KeyboardCache[web/src/engine/package-cache];
KeyboardCache-->IP;
DomUtils[web/src/engine/dom-utils];
DomUtils-->Utils;
OSK-->DomUtils;
OSK---->IP;
Configuration[web/src/engine/paths];
Configuration-->OSK;
CommonEngine[web/src/engine/main];
CommonEngine-->Configuration;
CommonEngine-->Device;
CommonEngine-->KeyboardCache;
CommonEngine-->OSK;
Attachment[web/src/engine/attachment];
Attachment-->DomUtils;
Attachment-->Elements;
end
subgraph WebEngine["Keyman Engine for Web (top-level libraries)"]
Browser[web/src/app/browser];
WebView[web/src/app/webview];
WebView--->CommonEngine;
Browser--->CommonEngine;
Browser-->Attachment;
end
```