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2011-05-27gitweb.js: use setTimeout rather than setInterval in blame_incremental.jsLibravatar Jakub Narebski1-15/+40
If there is a possibility that your logic could take longer to execute than the interval time, it is recommended that you recursively call a named function using window.setTimeout rather than window.setInterval. Therefore instead of using setInterval as an alternate way of invoking handleResponse (because some web browsers call onreadystatechange only once per each distinct state, and not for each server flush), use setTimeout and reset it from handleResponse. As a bonus this allows us to get rid of timer if it turns out that web browser calls onreadystatechange on each server flush. While at it get rid of `xhr' global variable, creating it instead as local variable in startBlame and passing it as parameter, and of `pollTimer' global variable, passing it as member of xhr object (xhr.pollTimer). Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-27gitweb.js: No need for loop in blame_incremental's handleResponse()Libravatar Jakub Narebski1-9/+4
JavaScript is single-threaded, so there is no need for protecting against changes to XMLHttpRequest object behind event handler back. Therefore there is no need for loop that was here in case `xhr' got new changes while processing current changes. This should make code a bit more clear. Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-27gitweb.js: No need for inProgress in blame_incremental.jsLibravatar Jakub Narebski1-18/+3
JavaScript is single-threaded, so there is no need for protection against re-entrancy via inProgress variable. In particular calls to setInterval handler are stacked if handler doesn't finish before new interrupt (before new interval). The same happens with events - they are (hopefully) stacked if even handler didn't finish work. Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-24gitweb.js: Add UI for selecting common timezone to display datesLibravatar John 'Warthog9' Hawley2-15/+310
This will modify HTML, add CSS rules and add DOM event handlers so that clicking on any date (the common part, not the localtime part) will display a drop down menu to choose the timezone to change to. Currently menu displays only the following timezones: utc local -1200 -1100 ... +1100 +1200 +1300 +1400 In timezone selection menu each timezone is +1hr to the previous. The code is capable of handling fractional timezones, but those have not been added to the menu. All changes are saved to a cookie, so page changes and closing / reopening browser retains the last known timezone setting used. [jn: Changed from innerHTML to DOM, moved to event delegation for onclick to trigger menu, added close button and cookie refreshing] Helped-by: Kevin Cernekee <cernekee@gmail.com> Signed-off-by: John 'Warthog9' Hawley <warthog9@eaglescrag.net> Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-24gitweb: JavaScript ability to adjust time based on timezoneLibravatar John 'Warthog9' Hawley2-0/+75
This patch is based on Kevin Cernekee's <cernekee@gmail.com> patch series entitled "gitweb: introduce localtime feature". While Kevin's patch changed the server side output so that the timezone was output from gitweb itself, this has a number of drawbacks, in particular with respect to gitweb-caching. This patch takes the same basic goal, display the appropriate times in a given common timezone, and implements it in JavaScript. This requires adding / using a new class, "datetime", to be able to find elements to be adjusted from JavaScript. Appropriate dates are wrapped in a span with this class. Timezone to be used can be retrieved from "gitweb_tz" cookie, though currently there is no way to set / manipulate this cookie from gitweb; this is left for later commit. Valid timezones, currently, are: "utc", "local" (which means that timezone is taken from browser), and "+/-ZZZZ" numeric timezone as in RFC-2822. Default timezone is "local" (currently not configurable, left for later commit). Fallback (should JavaScript not be enabled) is to treat dates as they have been and display them, only, in UTC. Pages affected: * 'summary' view, "last change" field (commit time from latest change) * 'log' view, author time * 'commit' and 'commitdiff' views, author/committer time * 'tag' view, tagger time Based-on-code-from: Kevin Cernekee <cernekee@gmail.com> Signed-off-by: John 'Warthog9' Hawley <warthog9@eaglescrag.net> Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-24gitweb.js: Provide getElementsByClassName method (if it not exists)Libravatar Jakub Narebski1-0/+51
The code is simplified and does not support full specification of native getElementsByClassName method, but implements just subset that would be enough for gitweb, supporting only single class name. Signed-off-by: John 'Warthog9' Hawley <warthog9@eaglescrag.net> Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-24gitweb.js: Introduce code to handle cookies from JavaScriptLibravatar Jakub Narebski1-0/+114
Introduced gitweb/static/js/cookies.js file provides functions for setting, getting and deleting cookies. Code taken from subsection "Cookies in JavaScript" of "Professional JavaScript for Web Developers" by Nicholas C. Zakas and from cookie plugin for jQuery (dual licensed under the MIT and GPL licenses). Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-24gitweb.js: Extract and improve datetime handlingLibravatar Jakub Narebski2-51/+161
Move formatDateISOLocal(epoch, timezone) function (and also helper timezoneOffset(timezoneInfo) function it requires) from common-lib.js to datetime.js Add new functions: * localTimezoneOffset - to get browser timezone offset in seconds * localTimezoneInfo - to get browser timezone in '(+|-)HHMM' format * formatTimezoneInfo - turn offset in hours and minutes into '(+|-)HHMM' * parseRFC2822Date - to parse RFC-2822 dates that gitweb uses into epoch * formatDateRFC2882 - like formatDateISOLocal, only RFC-2822 format All those functions are meant to be used in future commit 'gitweb: javascript ability to adjust time based on timezone' An alternative would be to use e.g. Datejs (http://www.datejs.com) library, or JavaScript framework that has date formatting (perhaps as a plugin). While at it escape '-' in character class inside tzRe regexp, as recommended by JSLint (http://www.jslint.com). Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-24gitweb.js: Provide default values for padding in padLeftStr and padLeftLibravatar Jakub Narebski1-3/+11
This means that one can use padLeft(4, 2) and it would be equivalent to runing padLeft(4, 2, '0'), and it would return '04' i.e. '4' padded with '0' to width 2, to be used e.g. in formatting date and time. This should make those functions easier to use. Current code doesn't yet make use of this feature. Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-24gitweb.js: Update and improve comments in JavaScript filesLibravatar Jakub Narebski2-15/+19
This consists of adding a few extra explanation, fixing descriptions of functions to match names of parameters in code, adding a few separators, and fixing spelling -- while at it spell 'neighbor' using American spelling (and not as 'neighbour'). This is post-split cleanup. Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-05-24gitweb: Split JavaScript for maintability, combining on buildLibravatar Jakub Narebski4-0/+937
Split originally single gitweb.js file into smaller files, each dealing with single issue / area of responsibility. This move should make gitweb's JavaScript code easier to maintain. For better webapp performance it is recommended[1][2][3] to combine JavaScript files. Do it during build time (in gitweb/Makefile), by straight concatenation of files into gitweb.js file (which is now ignored as being generated). This means that there are no changes to gitweb script itself - it still uses gitweb.js or gitweb.min.js, but now generated. [1]: http://developer.yahoo.com/performance/rules.html "Minimize HTTP Requests" section [2]: http://code.google.com/speed/articles/include-scripts-properly.html "1. Combine external JavaScript files" [3]: http://javascript-reference.info/speed-up-your-javascript-load-time.htm "Combine Your Files" section. See also new gitweb/static/js/README file. Inspired-by-patch-by: John 'Warthog9' Hawley <warthog9@eaglescrag.net> Signed-off-by: Jakub Narebski <jnareb@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>