gnome-shell/js/ui/search.js
Florian Müllner 2c5d825c87 search-display: Change the default display to use iconGrid
Current mockups display all search results as icons as used by
application results, so change the default result display to use
iconGrid/BaseIcon. Remove the custom application results display,
as it is no longer needed.

https://bugzilla.gnome.org/show_bug.cgi?id=634948
2010-11-29 16:35:53 +01:00

289 lines
8.2 KiB
JavaScript

/* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
const Signals = imports.signals;
const RESULT_ICON_SIZE = 48;
// Not currently referenced by the search API, but
// this enumeration can be useful for provider
// implementations.
const MatchType = {
NONE: 0,
SUBSTRING: 1,
MULTIPLE_SUBSTRING: 2,
PREFIX: 3,
MULTIPLE_PREFIX: 4
};
function SearchResultDisplay(provider) {
this._init(provider);
}
SearchResultDisplay.prototype = {
_init: function(provider) {
this.provider = provider;
this.actor = null;
this.selectionIndex = -1;
},
/**
* renderResults:
* @results: List of identifier strings
* @terms: List of search term strings
*
* Display the given search matches which resulted
* from the given terms. It's expected that not
* all results will fit in the space for the container
* actor; in this case, show as many as makes sense
* for your result type.
*
* The terms are useful for search match highlighting.
*/
renderResults: function(results, terms) {
throw new Error('Not implemented');
},
/**
* clear:
* Remove all results from this display and reset the selection index.
*/
clear: function() {
this.actor.get_children().forEach(function (actor) { actor.destroy(); });
this.selectionIndex = -1;
},
/**
* getSelectionIndex:
*
* Returns the index of the selected actor, or -1 if none.
*/
getSelectionIndex: function() {
return this.selectionIndex;
},
/**
* getVisibleResultCount:
*
* Returns: The number of actors visible.
*/
getVisibleResultCount: function() {
throw new Error('Not implemented');
},
/**
* selectIndex:
* @index: Integer index
*
* Move selection to the given index.
* Return true if successful, false if no more results
* available.
*/
selectIndex: function() {
throw new Error('Not implemented');
},
/**
* Activate the currently selected search result.
*/
activateSelected: function() {
throw new Error('Not implemented');
}
};
/**
* SearchProvider:
*
* Subclass this object to add a new result type
* to the search system, then call registerProvider()
* in SearchSystem with an instance.
*/
function SearchProvider(title) {
this._init(title);
}
SearchProvider.prototype = {
_init: function(title) {
this.title = title;
},
/**
* getInitialResultSet:
* @terms: Array of search terms, treated as logical AND
*
* Called when the user first begins a search (most likely
* therefore a single term of length one or two), or when
* a new term is added.
*
* Should return an array of result identifier strings representing
* items which match the given search terms. This
* is expected to be a substring match on the metadata for a given
* item. Ordering of returned results is up to the discretion of the provider,
* but you should follow these heruistics:
*
* * Put items where the term matches multiple criteria (e.g. name and
* description) before single matches
* * Put items which match on a prefix before non-prefix substring matches
*
* This function should be fast; do not perform unindexed full-text searches
* or network queries.
*/
getInitialResultSet: function(terms) {
throw new Error('Not implemented');
},
/**
* getSubsearchResultSet:
* @previousResults: Array of item identifiers
* @newTerms: Updated search terms
*
* Called when a search is performed which is a "subsearch" of
* the previous search; i.e. when every search term has exactly
* one corresponding term in the previous search which is a prefix
* of the new term.
*
* This allows search providers to only search through the previous
* result set, rather than possibly performing a full re-query.
*/
getSubsearchResultSet: function(previousResults, newTerms) {
throw new Error('Not implemented');
},
/**
* getResultInfo:
* @id: Result identifier string
*
* Return an object with 'id', 'name', (both strings) and 'icon' (Clutter.Texture)
* properties which describe the given search result.
*/
getResultMeta: function(id) {
throw new Error('Not implemented');
},
/**
* createResultContainer:
*
* Search providers may optionally override this to render their
* results in a custom fashion. The default implementation
* will create a vertical list.
*
* Returns: An instance of SearchResultDisplay.
*/
createResultContainerActor: function() {
return null;
},
/**
* createResultActor:
* @resultMeta: Object with result metadata
* @terms: Array of search terms, should be used for highlighting
*
* Search providers may optionally override this to render a
* particular serch result in a custom fashion. The default
* implementation will show the icon next to the name.
*
* The actor should be an instance of St.Widget, with the style class
* 'search-result-content'.
*/
createResultActor: function(resultMeta, terms) {
return null;
},
/**
* activateResult:
* @id: Result identifier string
*
* Called when the user chooses a given result.
*/
activateResult: function(id) {
throw new Error('Not implemented');
},
/**
* expandSearch:
*
* Called when the user clicks on the header for this
* search section. Should typically launch an external program
* displaying search results for that item type.
*/
expandSearch: function(terms) {
throw new Error('Not implemented');
}
};
Signals.addSignalMethods(SearchProvider.prototype);
function SearchSystem() {
this._init();
}
SearchSystem.prototype = {
_init: function() {
this._providers = [];
this.reset();
},
registerProvider: function (provider) {
this._providers.push(provider);
},
getProviders: function() {
return this._providers;
},
getTerms: function() {
return this._previousTerms;
},
reset: function() {
this._previousTerms = [];
this._previousResults = [];
},
updateSearch: function(searchString) {
searchString = searchString.replace(/^\s+/g, '').replace(/\s+$/g, '');
if (searchString == '')
return null;
let terms = searchString.split(/\s+/);
let isSubSearch = terms.length == this._previousTerms.length;
if (isSubSearch) {
for (let i = 0; i < terms.length; i++) {
if (terms[i].indexOf(this._previousTerms[i]) != 0) {
isSubSearch = false;
break;
}
}
}
let results = [];
if (isSubSearch) {
for (let i = 0; i < this._previousResults.length; i++) {
let [provider, previousResults] = this._previousResults[i];
try {
let providerResults = provider.getSubsearchResultSet(previousResults, terms);
if (providerResults.length > 0)
results.push([provider, providerResults]);
} catch (error) {
global.log ('A ' + error.name + ' has occured in ' + provider.title + ': ' + error.message);
}
}
} else {
for (let i = 0; i < this._providers.length; i++) {
let provider = this._providers[i];
try {
let providerResults = provider.getInitialResultSet(terms);
if (providerResults.length > 0)
results.push([provider, providerResults]);
} catch (error) {
global.log ('A ' + error.name + ' has occured in ' + provider.title + ': ' + error.message);
}
}
}
this._previousTerms = terms;
this._previousResults = results;
return results;
}
};
Signals.addSignalMethods(SearchSystem.prototype);