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chest: rewriting intro + moving figures in right folders
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### Introduction | ||
### Chest's Introduction | ||
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_Chest_ is a tool providing an \acrshort{api} and a \acrshort{gui} to store objects from a program A and to access it from a program B. | ||
For example, this can be used to keep to check equality between objects from the two programs... | ||
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![Chest overview](./figures/chest-overview.png) | ||
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#### Original repository | ||
#### Chest's Repositories | ||
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[Link to original repository](https://github.com/dupriezt/Chest) | ||
Originally, this project was the idea of the former PhD student _Thomas Dupriezt_. | ||
[Here is the link to the original repository](https://github.com/dupriezt/Chest). | ||
Now, the project is maintained by the [_pharo-spec_ organization](https://github.com/pharo-spec/Chest). | ||
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#### Install Chest | ||
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```smalltalk | ||
Metacello new | ||
baseline: 'Chest'; | ||
repository: 'github://pharo-spec/Chest'; | ||
load. | ||
``` | ||
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#### Open Chest | ||
Chest is available in the **world menu** of Pharo. It is available as an **entry of the Debug menu** | ||
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![Chest in debug menu](./figures/chest-debug-menu.png) | ||
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You can also enable it as a debugger extension in the debugging settings of Pharo: | ||
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![Chest debugger extension in the Pharo settings](./figures/chest-extension-in-settings.png) | ||
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In the debugger, Chest will provide a view as a tree of all chests with the objects inside. | ||
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> Maybe we need an image of the tree view here? | ||
#### More Details | ||
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##### Name (= ID) | ||
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Each Chest instance has an ID (String). These IDs are unique. Two chests cannot have the same ID. | ||
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##### Default Chest | ||
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This is an instance of Chest that can be interacted with in the same way as any other Chest by sending the messages to the `Chest` class. | ||
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##### Weak Chests | ||
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```Smalltalk | ||
Chest weak | ||
``` | ||
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is a way to access the class `WeakChest`. This class can be interacted with the same way as you would with the `Chest` class. | ||
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`WeakChest` has its own default chest, and can be used to manipulate this default chest or to create new weak chests. | ||
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##### Commands in context | ||
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###### Store object into chest | ||
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If you right-click on a code presenter with an `SpCodeInteractionModel` or `StDebuggerContextInteractionModel` (e.g: playground, debugger etc.), you can evaluate an expression and store the result in the chest of your choice, with the name of your choice: | ||
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![Store object context menu, inside the debugger](./figures/chest-store-object-context-menu.png) | ||
#### Chest's Basics | ||
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![Store object popup](./figures/chest-store-object-popup.png) | ||
Each `Chest` instance has a unique ID (String), which means that two chests cannot have the same ID. | ||
Each `Chest` class has a default instance and it is possible to send messages to these `Chest` classes as if they were their default instance themselves. | ||
Instances of `Chest` hold strong references to stored objects, which means that they prevent these objects from being garbage-collected, whereas instances of `WeakChest` hold weak references to stored objects, which means that they do not prevent these objects from being garbage-collected. | ||
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![Chest tree view inside the debugger, after having stored an object](./figures/chest-tree-view-after-store.png) | ||
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###### Load object from a chest into a playground or a debugger | ||
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It's also possible to load objects from a chest into these code presenters: | ||
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![Load object context menu, inside the debugger](./figures/chest-load-context-menu.png) | ||
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![Load object popup](./figures/chest-load-object-popup.png) | ||
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![Usage of the Chest variable inside the debugger, after having loaded the object](./figures/chest-variable-usage-after-load.png) | ||
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And then variables can be seen from any other context if it has been loaded in a debugger and these variables can be seen in the debugger inspector: | ||
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![Chest variable, in the debugger inspector](./figures/chest-variable-in-debugger-inspector.png) | ||
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Chest, as a debugger extension, provides a playground. All bindings between this playground and the debugger selected context are shared. So: all variables defined in this playground are recognized by the debugger and all variables from the debugger's selected context or loaded from Chest into the debugger are recognized by the playground. However, only the variables loaded from Chest (via the load menu entry described above) are displayed in the debugger inspector: | ||
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![Variable from Chest playground, not visible in the debugger inspector](./figures/variable-from-chest-playground-are-not-visible-in-debugger-inspector.png) | ||
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###### Inject code to access an object inside a chest, in a playground or in the debugger | ||
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To make it easier to access the content of a chest in a playground or in the debugger, it is possible to use the **Paste object from chest >** sub-menu. | ||
This sub-menu allows to choose a chest and the key of an object inside the chest. | ||
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![Paste object from Chest context menu](./figures/chest-paste-object-from-chest-context-menu.png) | ||
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When clicking on a variable name, the necessary code to access the corresponding object is pasted where you had put your cursor in the playground/debugger: | ||
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![Injected code for Chest, after having pasted the object](./figures/chest-injected-code-after-paste.png) | ||
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This command allows you to access objects from a chest, without relying on your memory of the `Chest` API. | ||
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###### Simpler code injection in any spec code presenter | ||
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The method described above to access objects in chests implies that your objects need to be stored in a chest with a name that you must remember... | ||
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Sometimes, you would like to access objects quickly, without needing to give a name to an object that is stored... | ||
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That's why it is possible to copy / paste (=inject code to access) to / from a "Clipboard Chest", just as you would do to copy/paste text to/from the clipboard. | ||
#### Open Chest | ||
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To do that, you just need to select the expression that you want to evaluate and whose results should be stored in the "Clipboard Chest", and then select **Copy object in a clipboard chest** in the context menu: | ||
_Chest_'s main graphical user interface can be opened **via an entry in the "Debug" world menu** of Pharo (Figure *@fig:chest-debug-menu@*). | ||
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![Copy object to Chest Clipboard context menu](./figures/chest-copy-object-to-clipboard-context-menu.png) | ||
![_Chest_ in _Debug_ World Menu](./figures/chest-debug-menu.png width=70&label=fig:chest-debug-menu) | ||
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This will store the result of the expression into the default clipboard chest. Please note, that if you "copy" another object to the clipboard chest, it will replace the previous copied object. Note also that the clipboard chest is a weak chest, so your object inside the clipboard chest can become `nil` if it gets garbage-collected. | ||
_Chest_ can also be enabled as a _debugger extension_ in the debugging settings of Pharo (Figure *@fig:chest-extension-settings@*). | ||
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In order to inject the code to access the object, you should then select in the context menu: **Paste last object copied to clipboard**: | ||
![_Chest_ Debugger Extension in the Pharo Settings](./figures/chest-extension-in-settings.png width=90&label=fig:chest-extension-settings) | ||
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![Paste last object from Chest Clipboard context menu](./figures/chest-paste-last-object-from-clipboard-context-menu.png) | ||
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And the code to access your object is now pasted: | ||
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![Injected code for Chest, after having pasted the object from Chest Clipboard](./figures/chest-injected-code-after-paste-from-clipboard.png) |
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### Chest Graphical User Interface | ||
### Chest Graphical User Interface (GUI) | ||
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![Chest overview](./figures/chest-overview.png) |
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### Chest Integration to Pharo | ||
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`What do we do about the integration of Chest to the debugger? The debugger extension still works but this is not possible to evaluate chest variables from the debugger. The fix is easy, but no one answers me. I will try to do the fix myself` | ||
#### Commands in context | ||
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##### Store object into chest | ||
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If you right-click on a code presenter with an `SpCodeInteractionModel` or `StDebuggerContextInteractionModel` (e.g: playground, debugger etc.), you can evaluate an expression and store the result in the chest of your choice, with the name of your choice: | ||
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![Store object context menu, inside the debugger](./figures/chest-store-object-context-menu.png) | ||
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![Store object popup](./figures/chest-store-object-popup.png) | ||
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![Chest tree view inside the debugger, after having stored an object](./figures/chest-tree-view-after-store.png) | ||
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##### Load object from a chest into a playground or a debugger | ||
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It's also possible to load objects from a chest into these code presenters: | ||
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![Load object context menu, inside the debugger](./figures/chest-load-context-menu.png) | ||
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![Load object popup](./figures/chest-load-object-popup.png) | ||
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![Usage of the Chest variable inside the debugger, after having loaded the object](./figures/chest-variable-usage-after-load.png) | ||
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And then variables can be seen from any other context if it has been loaded in a debugger and these variables can be seen in the debugger inspector: | ||
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![Chest variable, in the debugger inspector](./figures/chest-variable-in-debugger-inspector.png) | ||
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Chest, as a debugger extension, provides a playground. All bindings between this playground and the debugger selected context are shared. So: all variables defined in this playground are recognized by the debugger and all variables from the debugger's selected context or loaded from Chest into the debugger are recognized by the playground. However, only the variables loaded from Chest (via the load menu entry described above) are displayed in the debugger inspector: | ||
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![Variable from Chest playground, not visible in the debugger inspector](./figures/variable-from-chest-playground-are-not-visible-in-debugger-inspector.png) | ||
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##### Inject code to access an object inside a chest, in a playground or in the debugger | ||
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To make it easier to access the content of a chest in a playground or in the debugger, it is possible to use the **Paste object from chest >** sub-menu. | ||
This sub-menu allows to choose a chest and the key of an object inside the chest. | ||
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![Paste object from Chest context menu](./figures/chest-paste-object-from-chest-context-menu.png) | ||
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When clicking on a variable name, the necessary code to access the corresponding object is pasted where you had put your cursor in the playground/debugger: | ||
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![Injected code for Chest, after having pasted the object](./figures/chest-injected-code-after-paste.png) | ||
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This command allows you to access objects from a chest, without relying on your memory of the `Chest` API. | ||
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##### Simpler code injection in any spec code presenter | ||
|
||
The method described above to access objects in chests implies that your objects need to be stored in a chest with a name that you must remember... | ||
|
||
Sometimes, you would like to access objects quickly, without needing to give a name to an object that is stored... | ||
|
||
That's why it is possible to copy / paste (=inject code to access) to / from a "Clipboard Chest", just as you would do to copy/paste text to/from the clipboard. | ||
|
||
To do that, you just need to select the expression that you want to evaluate and whose results should be stored in the "Clipboard Chest", and then select **Copy object in a clipboard chest** in the context menu: | ||
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![Copy object to Chest Clipboard context menu](./figures/chest-copy-object-to-clipboard-context-menu.png) | ||
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This will store the result of the expression into the default clipboard chest. Please note, that if you "copy" another object to the clipboard chest, it will replace the previous copied object. Note also that the clipboard chest is a weak chest, so your object inside the clipboard chest can become `nil` if it gets garbage-collected. | ||
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In order to inject the code to access the object, you should then select in the context menu: **Paste last object copied to clipboard**: | ||
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![Paste last object from Chest Clipboard context menu](./figures/chest-paste-last-object-from-clipboard-context-menu.png) | ||
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And the code to access your object is now pasted: | ||
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![Injected code for Chest, after having pasted the object from Chest Clipboard](./figures/chest-injected-code-after-paste-from-clipboard.png) | ||
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