I want add 'Alt-Space' key map to codemirror and then perform a particular function when the keys are pressed. I am not able to add this keymap using .
cm.addKeyMap
Where should I be writing this function so that the key map can be bound to a particular function?
What is the exact code you are using?
For your information, you can always add any keyMap to the editor instance by the following lines of code :
var map = {"Alt-Space": function(cm){...}}
editor.addKeyMap(map);
where, editor is the CodeMirror instance.
Related
Often when I'm writing code I forget to surround a section of code with a method. For example, when printing an array, I realize that I forgot to pass the array into Arrays.toString().
String[] foo(){
return new String[3];
}
main() {
System.out.println(foo());
}
Is there a way in Eclipse that I can select foo() and then use auto complete or something to surround it with Arrays.toString()? So I want to end up with this:
main() {
System.out.println(Arrays.toString(foo()));
}
I know I could use templates, but I would have to make a template for each method I want to use. I'm looking for something like Eclipse's auto complete feature, which knows about every class and method in the build path.
Yes, you could use templates for that:
First, experiment with existing templates:
Go to the source editor and select "foo()".
Open the view General > Templates.
Select some template, for example, Java > toArray and see how it works.
Then, add your own template:
Windows > Preferences > Java > Editor > Templates > New.
I think the right context should be "Java".
Another way of accesing templates is through the content assist: In the source code, in a new line, start typing the first letters of your template, then press [CTRL][SPACE]. A selector will appear with the matching templates. You may find it useful to check the checkbox "Automatically inserted" in the template definition window.
And yet another way to access them is to select a line of code and then Context Menu > Surround With.
A quick way:
Double click or use select enclosing element and its cousins to select the expression you wish to wrap. ctrl-x to temporarily cut it. Type a few characters and ctrl-space to insert your method name and parentheses. Finally, ctrl-v to paste what you just cut.
with templates - under Java Statements: ${method}(${word_selection})${cursor}
You can make a template like the one described by #LittleSanti. If you use a fake template variable for the method name (like ${method} or ${name}) instead of a constant like foo, Eclipse will highlight it and let you paste or type or complete over it. Then when you hit return or tab, it will jump the cursor to the end (the position indicated by ${cursor}
Unfortunately I don't think Eclipse provides a "real" template variable for selecting methods in scope. It would be nice if it would let did completion for you on methods.
I'm currently trying to develop an Eclipse Plugin to support code replacement, like what the default content assist in Eclipse do. What I want to implement is something like "insert argument names automatically on method completion with visualized box around the argument" and I can "use the Tab key to navigate between the inserted names" and "while navigating, list of optional variables for current argument can be displayed and be chosen".
In short, it comes to two questions:
How to add the visualized box around the already existed variable or even Java keywords that need replacement? And at the meanwhile I can use Tab key to switch between these boxes.
How to display a list of candidates to select from when I trigger on the box?
By now I only figure out the extension point : org.eclipse.jdt.ui.javaCompletionProposalComputer may be useful, but I have no idea where to start at? Thanks in advance.
Oh, finally I've solved it myself...
For the 'box', it should be the LinkedModeModel, this class should work with LinkedPositionGroup and LinkedPosition to add mutiple boxes. And we should use LinkedModeUI to set it up.
For the content assistant, there's no need to use the extension point. There is a ProposalPosition class which extends LinkedPosition for you to add your proposals for the 'box' in its constructor. And we can simply use the CompletionProposal to construct a ICompletionProposal array as the argument of ProposalPosition's constructor.
I want to use copy and paste within my own view. Therefore I defined commands with a special context and activated it during the creation of the view.
The problem I'm now facing is that copy and paste is workin within my view but no longer within the normal eclipse world.
The context has a parent id into org.eclipse.ui.window.
Any hints how to seperate these contexs right so corresponding action is called at the right time.
I also turned on the key bind tracing within the debug options of org.eclipse.ui.
basic idea: How to override an existing key binding?
http://rcpexperiments.blogspot.de/2009/07/commands-key-bindings-and-contexts-in.html
key tracing: http://eclipsesource.com/blogs/2009/07/08/tip-tracing-keybindings-in-rcp/
You shouldn't need to use a context. You just provide an action handler for the global copy / paste actions:
IActionBars actionBars = getViewSite().getActionBars();
actionBars.setGlobalActionHandler(ActionFactory.COPY.getId(), copyAction);
actionBars.setGlobalActionHandler(ActionFactory.PASTE.getId(), pasteAction);
I'd like to bind a new keyboard shortcut to an existing context in my plugin.xml. How can I get a list of all known contextIds?
Specifically, I'm looking for a context ID that will bind the shortcut to the Project Explorer.
If you create a key binding in the plugin.xml editor there is a Browse button on the contextId line that will show you a list of know context ids.
In Eclipse, after a line like this:
List list = new ArrayList();
Typing "for" just beneath, and followed by "ctrl-space" (by default), will bring several options that can help completing this "for loop":
But if the variable "list" is declared far from here (e.g. as a class field) which may not be directly inferred from this context, or there are many Lists declared,then the assistance doesn't work well:
## split line ---
In some cases, Eclipse can assist, but just don't work for member variable. E.g. manually type "another" and ENTER after the ":" didn't persuade Eclipse to guess about it....
(P.S. workable case:
Auto guessed
Entered wanted name, and ENTER, works great
)
Does anyone have any tip to make this assistance work under such scenarios?
I followed Ashutosh Jindal's tip and I managed to configure the template that works (tested with Kepler release). Here it is:
for (${iterable_type:elemType(iterable)} ${iterable_element:newName(iterable_type)} : ${iterable:var(java.lang.Iterable)}) {
${cursor}
}
The main point was to change localVar to var in the template definition (the Eclipse docs clearly explain this).
How to use it:
Print the template name (foreach for default template) and hit Enter. The template will be used with default collection selected by Eclipse (the latest collection declared)
Hit TAB twice to jump to collection element. You will get drop down list with all iterable collections that apply.
Use UP/DOWN arrows to select desired collection, hit Enter. Eclipse will adjust element type and name (very cool).
Click for the screenshot
This works almost as good as Intellij templates. The drawbacks are:
template does not include arrays (as opposed to default foreach template). For arrays you have to define another template.
I have not tried this myself, but take a look at the code template definition. For example, the foreach code template is defined in Preferences -> Java -> Editor -> Templates as follows :
The definition is as follows :
for (${iterable_type} ${iterable_element} : ${iterable}) {
${cursor}
}
Notice the variables being used such as iterable_type.
Now take a look at this Eclipse help page.
There is a variable there called ${id:localVar(type[,type]*)} which is described as follows :
Evaluates to a local variable or parameter visible in the current scope that is a subtype of any of the given type. If no type is specified, any non-primitive local variable matches.
${array} is a shortcut for ${array:localVar(java.lang.Object[])}, but also matches arrays of primitive types.
${collection} is a shortcut for ${collection:localVar(java.util.Collection)}.
${iterable} is a shortcut for ${iterable:localVar(java.lang.Iterable)}, but also matches arrays.
A screenshot of the same :
I believe that if you wanted to increase the scope from which the foreach template infers it's variables, you may have to edit the template definition with the appropriate variable.
Let me know if this helps. Unfortunately, I have not delved into editing the code templates before so shall not be able to give a concrete example.
What I usually do to solve the content assist with for loop is the following:
create a local variable by typing collection variable that is declared far above and a semicolon:
list;
press Ctrl+2 L
Eclipse generates a new local variable declaration which looks like this:
List list2 = list;
type my foreach and autocomplete with Ctrl+space getting the following:
List list2 = list;
for (Object object : list2) {
}
place cursor on list2 in the for loop declaration and press Alt+Shift+I which stands for inline variable.
this results in what you want to achieve. The effort is minimal after some practicing:
for (Object object : list) {
}
Years later, if you enter the name of the field/variable you can press Quick Fix (⌘+1) and in the quick fix menu you can choose different types of for-loops for the collection or array.