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language_tools.js
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language_tools.js
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"use strict";
var snippetManager = require("../snippets").snippetManager;
var Autocomplete = require("../autocomplete").Autocomplete;
var config = require("../config");
var lang = require("../lib/lang");
var util = require("../autocomplete/util");
var textCompleter = require("../autocomplete/text_completer");
var keyWordCompleter = {
getCompletions: function(editor, session, pos, prefix, callback) {
if (session.$mode.completer) {
return session.$mode.completer.getCompletions(editor, session, pos, prefix, callback);
}
var state = editor.session.getState(pos.row);
var completions = session.$mode.getCompletions(state, session, pos, prefix);
callback(null, completions);
}
};
var transformSnippetTooltip = function(str) {
var record = {};
return str.replace(/\${(\d+)(:(.*?))?}/g, function(_, p1, p2, p3) {
return (record[p1] = p3 || '');
}).replace(/\$(\d+?)/g, function (_, p1) {
return record[p1];
});
};
var snippetCompleter = {
getCompletions: function(editor, session, pos, prefix, callback) {
var scopes = [];
// set scope to html-tag if we're inside an html tag
var token = session.getTokenAt(pos.row, pos.column);
if (token && token.type.match(/(tag-name|tag-open|tag-whitespace|attribute-name|attribute-value)\.xml$/))
scopes.push('html-tag');
else
scopes = snippetManager.getActiveScopes(editor);
var snippetMap = snippetManager.snippetMap;
var completions = [];
scopes.forEach(function(scope) {
var snippets = snippetMap[scope] || [];
for (var i = snippets.length; i--;) {
var s = snippets[i];
var caption = s.name || s.tabTrigger;
if (!caption)
continue;
completions.push({
caption: caption,
snippet: s.content,
meta: s.tabTrigger && !s.name ? s.tabTrigger + "\u21E5 " : "snippet",
type: "snippet"
});
}
}, this);
callback(null, completions);
},
getDocTooltip: function(item) {
if (item.type == "snippet" && !item.docHTML) {
item.docHTML = [
"<b>", lang.escapeHTML(item.caption), "</b>", "<hr></hr>",
lang.escapeHTML(transformSnippetTooltip(item.snippet))
].join("");
}
}
};
var completers = [snippetCompleter, textCompleter, keyWordCompleter];
// Modifies list of default completers
exports.setCompleters = function(val) {
completers.length = 0;
if (val) completers.push.apply(completers, val);
};
exports.addCompleter = function(completer) {
completers.push(completer);
};
// Exports existing completer so that user can construct his own set of completers.
exports.textCompleter = textCompleter;
exports.keyWordCompleter = keyWordCompleter;
exports.snippetCompleter = snippetCompleter;
var expandSnippet = {
name: "expandSnippet",
exec: function(editor) {
return snippetManager.expandWithTab(editor);
},
bindKey: "Tab"
};
var onChangeMode = function(e, editor) {
loadSnippetsForMode(editor.session.$mode);
};
var loadSnippetsForMode = function(mode) {
if (typeof mode == "string")
mode = config.$modes[mode];
if (!mode)
return;
if (!snippetManager.files)
snippetManager.files = {};
loadSnippetFile(mode.$id, mode.snippetFileId);
if (mode.modes)
mode.modes.forEach(loadSnippetsForMode);
};
var loadSnippetFile = function(id, snippetFilePath) {
if (!snippetFilePath || !id || snippetManager.files[id])
return;
snippetManager.files[id] = {};
config.loadModule(snippetFilePath, function(m) {
if (!m) return;
snippetManager.files[id] = m;
if (!m.snippets && m.snippetText)
m.snippets = snippetManager.parseSnippetFile(m.snippetText);
snippetManager.register(m.snippets || [], m.scope);
if (m.includeScopes) {
snippetManager.snippetMap[m.scope].includeScopes = m.includeScopes;
m.includeScopes.forEach(function(x) {
loadSnippetsForMode("ace/mode/" + x);
});
}
});
};
var doLiveAutocomplete = function(e) {
var editor = e.editor;
var hasCompleter = editor.completer && editor.completer.activated;
// We don't want to autocomplete with no prefix
if (e.command.name === "backspace") {
if (hasCompleter && !util.getCompletionPrefix(editor))
editor.completer.detach();
}
else if (e.command.name === "insertstring") {
var prefix = util.getCompletionPrefix(editor);
// Only autocomplete if there's a prefix that can be matched
if (prefix && !hasCompleter) {
var completer = Autocomplete.for(editor);
// Disable autoInsert
completer.autoInsert = false;
completer.showPopup(editor);
}
}
};
var Editor = require("../editor").Editor;
require("../config").defineOptions(Editor.prototype, "editor", {
enableBasicAutocompletion: {
set: function(val) {
if (val) {
if (!this.completers)
this.completers = Array.isArray(val)? val: completers;
this.commands.addCommand(Autocomplete.startCommand);
} else {
this.commands.removeCommand(Autocomplete.startCommand);
}
},
value: false
},
/**
* Enable live autocompletion
*/
enableLiveAutocompletion: {
/**
* @param {boolean} val
*/
set: function(val) {
if (val) {
if (!this.completers)
this.completers = Array.isArray(val)? val: completers;
// On each change automatically trigger the autocomplete
this.commands.on('afterExec', doLiveAutocomplete);
} else {
this.commands.removeListener('afterExec', doLiveAutocomplete);
}
},
value: false
},
enableSnippets: {
set: function(val) {
if (val) {
this.commands.addCommand(expandSnippet);
this.on("changeMode", onChangeMode);
onChangeMode(null, this);
} else {
this.commands.removeCommand(expandSnippet);
this.off("changeMode", onChangeMode);
}
},
value: false
}
});