This file contains a summary of changes to the Oppia code base. For a full changelog, please see

https://github.com/oppia/oppia/commits/master

v2.4.2 (22 Apr 2017)

--------------------

Collection player:

* Fix #3327: Changed text in collection player card from 'highlight' to 'hover over' (#3335)

* Fix open in new tab bug for Firefox (#3348)

* Only show 'return to collection' when there are no other recommendations to show, so that the learner is not confused about what to do next. (#3312)

* Fix #2985: Introduce collection learner view mobile version (#3197)

* Convert GLOBALS to AJAX for collection editor permissions (#3126)

* Fix #3131: collection footer and sharing directive added to collection player (#3216)

Editor:

* Fix #3028: Add confirmation modal dialog for clearing image and regions (#3339)

* Fix #1774: Changed color combination required for visibility of reminder bubble in editor. (#3277)

* Fix #3093: Popover of Userhelp button remains constant when the user creates the exploration for the first time. (#3267)

* Add dependencies to collection editor (#3261)

* Fix #3094: Fix license terms link in image interaction (#3236)

* Fix #2813: Customization arg model is bypassed for interactions that have no arg to customize. (#3176)

* Fix #3101: Discard-draft Tooltip (#3205)

* Fix #3099: Clarify error message for Item Selection and Multiple Choice interaction (#3184)

* Fixes #3051: Image regions can be resized by clicking and dragging (#3144)

* Fix #3122: Number Fields Bring Up Numeric Mobile Keyboards (#3167)

* Fix #2039: Allow editors to preview summary tiles (#3069)

I18N:

* Fix part of #3132: Add i18n keys to About and Profile pages; minor Hindi translations for the search bar (#3299)

* Fix part of #3132: Add missing i18n keys and Hindi translations for creator dashboard (#3235)

* Fix part of #3132: Add missing translation keys to preferences page (#3231)

* Fix #2734: Add i18n keys to preferences (#3219)

Creator Dashboard:

* Fix #2160: Introduce first version of tests involving deleting explorations for creator dashboard (#3196)

* Fix #3318: Style fixes for collection card in creator dashboard (#3330)

* Fix overflowing of names in the subscription card. (#3270)

Machine Learning system:

* Fix #3283: Fix the interactionRulesService error in trainUnresolvedAnswerModal. (#3325)

* Fix #3282: Fixes the validate() function for LDAStringClassifier (#3322)

* Fix #3297: Renaming Classifier Registry method (#3298)

* Fix #3045: Introduce end to end test for classifyHandler (#3255)

* Fix #2986: Add helper functions to classifier_services.py (#3070)

* Updated tests with assertRaisesRegexp and test to test type of elements in LDAStringClassifier

* Added tests to LDAStringClassifier and added comments in classifier_domain_tests

* Fix #3180: Fix the "interactionRulesService" not found error in teachOppiaModal. (#3181)

* Fix #3169: Fix the alignment of the submit button in teachOppiaModal (#3171)

Splash, About, Donation pages:

* Fix #3319: Oppia video at the donation page no longer shows "Related videos" after the video finishes (#3321)

* Update donation page statistics. (#3313)

* Introduce a promo bar (#3262)

* Fix #3097: Make splash page buttons non-constant width to accommodate different languages. (#3191)

* Fix #2400: Oppia-donation card margin corrections (#3214)

* Add a check that user contributions for logged in users exist on the home page redirect check (#3213)

Code health:

* Fix #3064: Refactor CSS into corresponding directives (#3352)

* Refactoring: removed 'role' variable from GET request used in editor.py in delete method (#3275)

* Fix part of #2863: Create ParamChange object factory (#3302)

* Fix part of #2394: Added docstrings in summary_services.py (#3263)

* Fix part of #2863: Create trigger object (#3273)

* Fix part of #2863: Create outcome object factory (#3260)

* Fix part of #2863: Create front-end domain object for Rules (#3229)

* Fix part of #2394: add docstrings for core/platform/models.py (#3226)

* Fix part of #2863: Create front-end content object factory (#3224)

* Fix #2394: Add useful docstrings to core/storage/job/gae_models.py (#3195)

* Fix #3192: shifted back css of oppia-sidebar-menu-open back to oppia.css (#3211)

* Fix part of #2863: Create front-end fallback domain object (#3207)

* Fix part of #2863: Create front-end domain object for Interactions (#3049)

* Fix part of #2394: Added docstrings in cron.py (#3182)

* Fixes part of #3064: pull the directive specific css in corresponding files from oppia.css (#3077)

Infrastructure:

* Fix #3199: Refactor constants loading to avoid synchronous XMLHttpRequest (#3323)

* Fix #1852: Transition to ESLint (#3264)

* Add installation of peer dependency: jasmine-core. (#3266)

* Upgrade protractor, karma and karma-jasmine (#3251)

* Fix #3047: Collection contents migration (#3209)

* Fix #3232: Generate source maps into separate files (#3233)

* Add e2e test to visit the links in the about dropdown (#3223)

* Add e2e tests for suggestion acceptance on explorations (#3202)

* Fix #3162: set expiration explicitly for files in the build directory. (#3203)

* Remove remaining extraneous js files from base.html #3137

* Fix #2828: Add IE9 support for sidebar. (#3178)

Other UI fixes:

* Fix #2018: make toast z-index lower than navbar z-index (#3320)

* Fix #2870: Limit exploration cards to screen width to maintain centering. (#3250)

Misc:

* Fix #2936: Limit the length of goal description in explorations. (#3274)

* Fix #3293: Introduction of a static maintenance page (#3308)

* Fix #3135: Switch from Static Image Resources By Using Existing Font Awesome Icons (#3193)

* Fixes: footer padding on mobile, #3121 (#3186)

* Localisation updates from https://translatewiki.net.

v2.4.1 (12 Mar 2017)

--------------------

Interactions:

* Fix #3027: Update Add Vertex functionality in GraphInput, when vertex is added mode is changed to "MOVE". (#3115)

* Fix #3102: Update Guppy to 260da66 to enable better compatibility with non-US keyboards (#3103)

* Fix #2964: remove reset icon and add undo reset functionality in pencil code editor (#3055)

Accessibility:

* Add span text with special class for several icon buttons and links; fix focus styles issue for seach bar; no focus style fix required for language select element

* Update icon button text width to address spacing issue in Chrome; Add ARIA role to About, Profile, and exploration Author profile to offer screenreaders some indication that these are menus; Update delete icon on select input to have icon button text; Remove aria-label from item selection to allow for clearer labels

* Add aria-label to user menu so that it is properly read as user menu instead of as user avatar; add role to author profile dropup menu so that it is recognized as a menu; update icon accessibility span class name to be more descriptive and add more to the comment above the style in oppia.css

* Fix #2955: add alt tag equal to value of getCategory() (#3023)

UI tweaks:

* Fix #2814: Add new items button visibility in the SetInput interaction on mobile (#2951)

* Fix #3120: Buttons on About page have text overflow on mobile. (#3123)

* Fix #3037: changed the height of the dropdown save button and width of the discard draft button. (#3100)

* Fix #3063: change the default confirmation box in "discard draft" to modal (#3068)

* Remove word-break so that lesson titles don't break unnecessarily across lines. Reverts part of #2971. (#3130)

* Fix #3129: Make navbar text items visible again by changing to rem. (#3150)

* Fix #3066: fixed summary tiles to show the full objective. (#3128)

* Fixes #3136 alignment of oppia meaning text in about page after doing required changes (#3153)

Code health:

* Convert state dictionary data in FeedbackTab to State objects (#3125)

* Add docstrings for core.domain.param_domain.py (#3078)

* remove image uploader directive from base.html (#3090)

* Remove more js files from base.html (#3087)

* Fixes #1695: Way to automatically provide backend constants to the frontend. (#3033)

* Fix #1858 Added source-maps for better debugging (#3086)

Other:

* Fix #3094: Change the license terms URL link to go to foundation tab of about page. (#3105)

* Fix part of #3073: Add exploration link to feedback email. (#3108)

* Change http to https in some places in setup.sh, particularly for downloading node. (#3133)

* Add analytics tracking for card-transition and completion in the player. (#3088)

* Fix #2987: add a "correct" field to each answer group (#3084)

* Fix #2966: modified the the redirection rules when the user goes to root url (#3034)

v2.4.0 (18 Feb 2017)

--------------------

Collection Player

* Fix #3031: track user progress and minor UI changes to match original mocks (#3054)

* Fix bugs and improve UI

Subscribers

* Fix part of #2287: Display subscribers and subscriptions and send emails on publishing. (#3036)

Creator Dashboard

* Standardize truncation of objectives and display of titles on summary tiles. (#3067)

Accessibility

* Standardize focus styles across site

Other

* Fix #2990: Implement workaround to make MathExpressionInput usable on mobile devices. (#3039)

* Fix #2989: Check if all files end with exactly one newline character. (#3005)

* Added docstring to "core.domain.exp_services" (#2924)

* Add Classifier model id (#2961)

v2.3.9 (14 Feb 2017)

--------------------

Collection Learner View

* Fix #2526: Path version of the collection learner view (PR #2979)

UI Tweaks

* Fix #2874: Show the exploration name in the mobile view (PR #2888)

* Fix #2894: Align the footer properly for exploration player in mobile view (PR #2897)

* Fix #2893: Modify buttons on Teach page to make width uniform (PR #2898)

* Fix #2817: Move Call to action buttion in Teach Page and fixes on about page bar on small screens

* Fix #2816: Add call to action buttons to the Foundation page (PR #2903)

* Fix #2817, Move Call to action buttion in Teach Page and fixes on about page bar on small screens (PR #2911)

* Fix alphabetical ordering of authors (PR #2912)

* Fix #2821: Fixed vertical alignment of headers (PR #2909)

* Fix #2914: Improve spacing of buttons on Teach and About pages

* Fix #2868: Fix social icons positioning in hamburger menu (PR #2932 and PR #2949)

* Fix #2551: Add full objective in the library tiles as tooltip (PR #2934)

* Remove links from collection page objectives in table and capitalize first letter of first word in objective

* Fix #2944: Changed z-index on splash button container so browse button is clickable. (PR #2970)

* Fix button text size on splash page (PR #2928)

* Merge branch 'develop' into translatewiki

* Fix #2620 : Fix exploration card height and deadzone (PR #2971)

* Fix #2918: Fix collection tile in creator dashboard. (PR #2973)

* Fix #2975 Adds full objective in the library tiles as popovers

Site Reliability/Assessibility

* Add -L for curl redirect (PR #3021)

* Fix #3010: Replace nodelist.forEach use with for loop for better compatability. (PR #3019)

* Fix #3003: Use Angular's debouncer for Library search. (PR #3006)

* Fix #2830: update styles in footer sharing links to allow them to show in IE (PR #2917)

* Add h1 on collection page and add ARIA role to footer tag (PR #2959)

* Refactor capitalizing the exploration objectives on the collection page to remove javascript from the html.

* Fix #2922: Hide hamburger menu >768px, add function to handle navbar overflow (PR #2927)

* Fixes #2956: Images in explorations have descriptive alt attributes (PR #2972)

* Fix part of #2862: Add alt attributes to images (PR #2957)

* Fix #2954: add appropriate lang attribute to site pages (PR #3004)

* Fix #2919: Fix the loading of the editor page. (PR #2958)

Emails

* Fix part of #2557: Refactoring of email preferences and add functionality to incorporate user's preferences of feedback / suggestions (PR #2892)

* FIx #2768: Implement email receiving functionality for feedback messages. (PR #3029)

* Rename userExplorationEmailsHandler service to UserEmailPreferencesService (PR #3040)

Frontend Refactor

* Fix #2722: Split exploration save and publish button to directive (PR #2896)

* Fix part of #2863: Create AnswerGroup domain object (PR #2883)

* Add dependencies to collection editor html (PR #2996)

Subscriptions

* Fix part of #2287: Email preferences for subscriptions

* Fix part of #2287: Add handlers for subscription and unsubscription (PR #2886)

* Fix part of #2287: Add subscribe and unsubscribe button to profile of authors

Machine Learning

* Fix #2726: Create domain & storage classes for classifier model & tests (PR #2846)

* Fix #2728: Add AlgorithmRegistry and test class. (PR #2926)

* Fix #2950: Moved classifier methods and test from reader to classifier_services (PR #2974)

Dev tools/code health

* Add travis retry all tests except for backend and linting (PR #2890)

* Add Docstrings in exploration/gae_models.py (PR #2889)

* Fix #2455: Add lockfile functionality to fix inconsistent directory permissions in Vagrant (PR #2749)

* Update release info output to fit format of changelog (PR #2908)

* Fix #2857: Added excluded_dirs in Lint pattern matching (PR #2905)

* Fix #2064: Add a test for keys present in source code and not in en.json (PR #2933)

* Fix #2394: Add docstring to core/storage/user/gae_models.py (PR #2962)

* Docstrings added in the file core/storage/email/gae_models.py (PR #2900)

* Fix part of #2394: Update docstrings in core.storage.collection.gae_models (PR #2982)

Other

* Update translations from translatewiki

* Fix translatewiki attirbution in credits (PR #2916)

* Fix #2662: Upgrade math-expressions to 370a77. (PR #2984)

* Update guppy to the version f6e0bbf in order to prevent a startsWith() error in IE. (PR #3041)

v2.3.8 (10 Jan 2017)

--------------------

Learner view:

* Fix tutor card icon not clickable in learner view (PR #2824)

* Fix #2832: Add space between footer and summary explorations container (PR #2833)

* Fix #2842: do not submit an answer or clear the help card if there is already a destination card defined. (PR #2843)

* Fix #2800: Style the author profile pop-up like about dropdown (PR #2864)

* Fix #2680: Ensure that the the help card can be seen (PR #2835)

* Fix #2588: Make LATEX smaller in learner view (PR #2854)

Splash and donations pages:

* Add call to action links on English default splash page (PR #2818)

* Fix #2855: Fix showing help text when javascript is not enabled (PR #2856)

* Fix #2128: Add alt tags to about page (PR #2858)

* Fix #2877: splash page banner should not be able to scroll horizontally. (PR #2879)

* Add 'Get Started' link to the sidebar. (PR #2836)

* Fix #2815:add third button for credit card payment (PR #2881)

* Fix #2128: Add alt tags to donate, library, and splash pages (PR #2882)

Dashboard:

* Fix #2764: Enable right clickability for all explorations in the dashboard (PR #2823)

* Remove the 'total number of feedback threads' statistic from the dashboard. (PR #2837)

* Fix #2548: Make sorting in the dashboard more intuitive. (PR #2838)

Other pages:

* Fix #2716: Show only simple editor tools on medium screens (PR #2850)

* Fix #2789: Remove white panel behind exploration cards in profile page. Remove 'Portfolio' text. (PR #2810)

* Fix #2026: Add panel to show collection owner and permissions (PR #2865)

* Fix #2801: Change collection style in library and remove shadows from carousel scrolling. (PR #2876)

I18N:

* Update various translations

Emails:

* Initial work on email muting (PR #2851)

* Initial work on email subscription preferences (PR #2849, #2878, #2886)

Code health:

* Fix #2248: Add e2e tests for feedback on explorations (PR #2753)

* Fix #2251: Add e2e tests for parameters (PR #2834)

* Add tests to make sure that test email is not sent to query recipients. (#2848)

* Update docstrings in user_services.py (PR #2622)

* Remove unused images in assets/common (PR #2847)

* Fix #2727: Refactor classifier so a BaseClassificationAlgorithm class can be used as a base for classification algorithms (PR #2743)

* Fix #2722: Split exploration editor into several files (PR #2844)

v2.3.7 (4 Dec 2016)

-------------------

Learner view:

* Fix #2686: make autofocus behave correctly in the player view (PR #2805)

* Do not wrap mathematical formulae that are less than 500px wide (PR #2772)

* Fix some janky animations in the learner view (PR #2809)

* Fix #1924: rename the button at the end of an exploration from 'return to library' to 'go to library' (PR #2771)

Editor:

* Fix #2626: in the exploration editor, gray out the screen immediately after a draft is discarded (PR #2663)

* Move exploration save/publish functionality to a new explorationSaveService (PR #2718)

* Reword the 'share' invitation after a creator publishes an exploration.

Library page:

* Remove thumbnail images that show up in exploration summary tiles on the search page (PR #2756)

* Increase the debounce time for executing a search query.

Other pages:

* Update the copy across the site (PR #2793)

* Fix #2735: standardize the backgrounds for the collection player, exploration player and various static pages (PRs #2758, #2763, #2782)

* Fix #2788: Make all the background colors consistent throughout the site (PR #2794)

* Remove functionality for opening the sidebar on swipe (PR #2769)

* Fix a bug where the navbar overflowed off the right side of the screen (PR #2795)

* Fix an incorrect navbar breakpoint (PR #2795)

* Fix #2787: eliminate blue outlines on focused buttons (PR #2797)

* Fix the color of collection descriptions in the creator dashboard (PR #2765)

* Fix part of #2665: split up directives in FormBuilder.js into separate files (PR #2666)

Interactions:

* Add a benchmark test for the string classifier (PR #2697)

* Fix #2754: make the math expression input field clearer (PR #2785)

* Fix #2755: allow the math expression input field to accept fractions.

* Add a 'submit' button to the NumericInput interaction.

I18N:

* Add Turkish translations.

Emails:

* Fix #2269: complete the functionality for sending emails to all users returned via a query (PR #2717)

* Fix #2790: add functionality for testing a bulk email prior to sending it out (PR #2799)

Dev tools:

* Update node.js to v6.9.1.

* Update guppy to v1.1.0 (PR #2786)

* Fix #2611: update protractor to v4.0.11 (PR #2777)

* Add e2e tests for collections

* Remove the flaky performance test from the regular Travis build (PR #2757)

* Fix an issue where Travis was broken because it could not detect the location of the Java executable (PR #2796)

* Fix #2773: remove some flakiness in the interactions e2e test.

* Fix a YouTube console error in the e2e tests (PR #2742)

Code health:

* Add docstrings to email_manager.py (PR #2720)

* Add docstrings to html_cleaner.py (PR #2779)

v2.3.6 (14 Nov 2016)

--------------------

Learner view:

* Update learner view design by adjusting spacing at top of cards, augmenting card shadows, updating background images, and removing the share icons at the end.

* Hide continue button when pagging back through the cards

* Add Math component while suggesting changes

* Fixed footer in learner view

* Update the backgrounds of both players to use a solid blue background

* Change font color from white to green at end of exploration

* Fix color of progress dots in learner view

* Fix tutor card position when viewport is narrow

* Fix jittering help card at a certain size

* Fix formatting error in item selection interaction display of learner answers

* Add automatic line breaking for LaTeX expressions

Editor:

* Update the warning labels for changing the objective to be more clear

* Upgrade math-expressions library and interpret the creator-defined string as LaTeX instead of text

* Fix a bug where customization arg attributes are saved in the wrong order, leading to the item selection input interaction not recognizing HTML snippets with images

* Add focusing functionality to the rich-text editor

Collections:

* Add option to go to collection view after finishing an exploration

* Use collection-summary-tile for collections on small screens

* Ensure explorations of a single state are properly recorded when completed

* Remove 'Collection >' breadcrumb from collection player navbar

Library page:

* Make library carousel title links more obvious and remove "View All" button

* Add protractor tests for visiting library pages

* Change the mouse cursor to a pointer when the scroll button appears in the library

Other pages:

* Add a "Get Started" page.

* Fix splash content alignment

* Hide site feedback message text on smaller devices

* Allow right clicking on dashboard tiles

* Display a success toast when a new featured exploration is added

I18N:

* Fix Indonesian translation

Emails:

* Add functionality for sending emails to existing users in bulk.

Dev tools:

* Determine Vagrant env by checking existence of a file and env var

* Fix flakiness when accepting alerts in Protractor tests

Code health:

* Refactor learner view

* Minimize calls to is_admin, static site_name and feedback_url

* Remove 'ALTERNATE' tag on translations

* Refactor ID generation procedure into a separate service.

* Separate the top navigation bar into its own directive

* Split up the admin page controller

* Update stripFormatting filter to preserve bold and italics

* Improve docstrings for gae_models.py

* Add docstrings for core.domain.stats_domain

* Add docstrings for core.domain.stats_jobs_continuous

* Add docstrings to gae_models.py

v2.3.5 (17 Oct 2016)

--------------------

Infrastructure and tests:

* Upgrade protractor to v4.0.9

* Add protractor tests to visit static pages and for logged-in flow

* Fix .load() method breakage due to jQuery upgrade

* Use one-time bindings for admin page

* Remove mail validation checks from mailgun email API

* Add docstrings to collection_services.py

I18N:

* Add Portuguese (Brazil) translation

UI fixes:

* Make notifications right-clickable

* Fix fallbacks triggering at the wrong time

* Don't allow 'featured' label to break into 2 lines

* Fix About page display on mobile

v2.3.4 (10 Oct 2016)

-------------------

Embedded explorations:

* Have a dedicated URL for iframed explorations.

* Make the embedding script minimal.

Creator Dashboard:

* Display top unresolved answers and new feedback for dashboard explorations in a dropdown.

* Make collection tiles in dashboard similar as in library.

Emails and notifications:

* Add a MR job for executing queries.

* Fix bugs relating to emails.

Player and editor:

* Add functionality to report explorations.

* Add collection recommendation for logged out users.

* Strip formatting when text is pasted into the RTE.

* Add check for objective length before publishing an exploration.

* Show multiple rules for an answer group.

* Fix placeholder for math input.

Code health:

* Major refactor of frontend code.

* Update docstrings.

* Delete duplicate angular filters.

* Add e2e test for visiting moderator page.

* Make 'ddescribe' and 'iit' forbidden strings.

* Add an argument to show verbose log for backend tests.

Infrastructure:

* Upgrade jQuery to v3.0.0. Update AngularJS to v1.5.8.

* Install requests package in third_party so that it is available to the deployed application.

Library, collections and other pages:

* Sort explorations in Top Rated and Recently Published pages.

* Remove View all button and link for featured explorations.

* Modified UI for adding a new exploration in collection.

* Improve collection node list UI.

* Remove splash page A/B tests.

* Embed the Oppia blog on the main site.

v2.3.3 (9 Sep 2016)

-------------------

Splash, About and Donation pages:

* Update the Donation page.

* Change splash pages used in experiments.

* Fix #2400: Change margins and box-shadow on About and Donation page.

* Fix broken url link to image on donation thanks page.

* Use static URLs for the images on the Donate and Thanks pages.

* Fix #2371: Prevent 404 errors when loading images in activity creation modal.

Speed:

* Cache images served via ImageHandler

* Add pre-rendering to splash pages.

* Externalize first party js modules.

* Handle extension resources

* Fix #2413: ignore copying python files when generating build directory

* Fix #2380: remove js inlining from objects/templates

Emails:

* Fix #2259: Implement mailgun api for sending emails.

* Fix #2349: Add service for sending feedback email to thread participants.

Dashboard:

* Add sorting to the creator dashboard.

* Fix #2244: Fix activity tiles alignment.

Mobile:

* Fix #2044: User can now open and close the sidebar by swiping right and left.

* Fix #1799: The explorations are now centered for a non-mobile device.

Library:

* Fix #2163: handle error due to invalid search cursor being used when searching in the library.

* Align the tops of the exploration and collection cards on the library page.

Editor, player and interactions:

* Fix save diff modal not loading sometimes.

* Modify code REPL rules to do less normalization for snippets.

* Fix #2311: Add word-wrap for exploration card content.

* Remove title, goal, and category alertService alerts.

* Refactor interaction $scope.$parent.submitAnswer.

* Extract non-inline interaction code from div['.conversation-skin-inline-interaction'].

Misc:

* Add tests to collection linearizer service

* Fix #1800: remove unnecessary margins and update responsive breakpoint in Notifications page.

* Fix #2354: put languages in alphabetical order in language dropdown.

v2.3.2 (7 Aug 2016)

-------------------

Splash, About and Donation pages:

* Add donation page.

* Add video to donation page.

* Update About, Teach and Contact pages.

* Add different splash pages for splash page experiments.

* Change Forum link to Donate.

* Fix #2277: Make credit columns equal length in credits.

Creator Dashboard:

* Show number of unresolved answers and open feedback in creator dashboard.

* Display relative (weekly) change in average ratings statistics.

* Add realtime layer for UserStats continuous job.

* Make current UI of creator dashboard responsive.

* Fix #2222: Make width of tiles add up to the width of the top bar.

Performance:

* Fix #2048: Add performance tests for various Oppia pages.

* Add cache slugs to cache static assets.

* Combine multiple font requests into one.

* Add pre-rendering.

* Fix #2293: tests for cache slugs.

* Fix #2063: convert continuous jobs into one-off jobs.

* Add a new main_taskqueue.py file for taskqueue handlers.

i18n:

* Fix #2179: Add Vietnamese translation.

* Fix #2301: Added hindi translation.

* Fix #2229: Add test to match en.json and qqq.json.

* Fix #2274: Remove blank line in language selector on home page.

Editor:

* Fix #1863: Suppress warnings if all answers handled in item selection input.

* Don't show the creation modal in the 'create activity' flow if it's not needed.

* Fix #2017: Update publish button to show number of changes that are made.

* Fix #1862: Creator no longer has to remove pre-existing text in content editor.

* Fix #2094: Change 'Done' button to 'Save' and color it green in state title editor.

* Fix #2176: Add minimum length to the objective of exploration.

* Fix #1966: Remove the option for links to open in same window in RTE.

* Fix #2337: Show feedback in the fallback editor.

* Style the placeholder for multiple-choice input.

Emails:

* Fix #2211: send suggestion email to owner of exploration.

* Fix #2258: Do not send feedback messages if user has already seen to them.

* Add noreply email for notification emails.

Admin page:

* Fix #2197: Refresh admin page keeps it at same location.

* Fix #2195: Add auto-scroll to show output in jobs tab.

* Fix #2196: Add alternating colors to jobs list on admin page

* Hide the 'Activities' tab in the production environment.

Collections:

* Fix #1990: Add ability to edit language code and tags in collection editor.

* Fix #2116: Remove return to collection button.

Development workflow:

* Fix #2232: Do not show unnecessary feconf version change info in the release info generated by the release info script.

* Update chromedriver to fix an e2e test bug.

* Add more logging to the Python linter.

* Fix #2271: Add documentation about minification flag and check for bad pattern before committed.

* Fixes for the deploy script.

Misc:

* Remove PAGE_NAME_FOR_CSRF when generating CSRF token.

* Alphabetize and limit GLOBALS to 80 chars in html.

* Add diagnostic one-off job to highlight ItemSelectionInput interactions whose answer groups need to be fixed.

* Normalize whitespace, and capitalization in strings in code interaction.

* Add analytics events.

* Fix #2247: Update README image.

v2.3.1 (3 Jul 2016)

-------------------

Creator dashboard and notifications:

* Fix #1366: redesign the creator dashboard to highlight stats and display card/list view.

* Fix #461: implement functionality for sending emails to creators when they receive feedback messages on their explorations.

* Remove the "neither, thanks" option from the activity creation modal.

* Implemented a version of stats_services.get_top_state_rule_answers to

fetch answers for multiple explorations simultaneously.

Library page:

* Read featured activities from a list, in order to reduce loading time in the library.

* Change "featured explorations" to "featured activities" in the library.

* Add scripts to randomize the library banner image.

* Fix #2013: correctly align the banner image.

* Fix #2164: expand the width of an exploration summary tile to match the width for the collection summary tile.

* Fix #1979: fix alignment of the carousel scroll buttons.

* Fix #2144: position the language dropdown selector correctly in the navbar for screen widths less than 1230px.

* Fully remove the 'contributors' field from the exploration summary data passed to the frontend.

Learner page:

* Fix #1795: add social sharing icons to the end of an exploration.

* Fix #2113: prevent recommended explorations from disappearing behind the tutor card on small screens.

* Fix missing text next to player feedback checkbox.

* Remove the standard navbar tabs from the collection player.

Editor page:

* Use the graph visualization in the history tab to display the changes when an exploration is saved, and remove the corresponding logic from the backend.

* Fix #1801: modify the “publish exploration” modal to be more visually appealing.

* Add a button to the exploration preview tab that allows the user to restart from the initial card.

* Show a list of all current parameter values in preview mode.

* Hide the exploration graph if there is only one card in the exploration.

* Fix #2078: prevent unsaved changes from being lost when editing a state name.

* Change the wording for the "featuring" functionality in the exploration settings tab to indicate that this no longer places the exploration in the “Featured Activities” group in the library.

Profile page:

* Fix #1867: prevent the tooltips on the summary tiles from flickering.

* Fix #2075: make the subject interests wrap properly.

Preferences page:

* Fix #2092: prevent the dropdown placeholders from showing i18n keys instead of the correct placeholders.

* Fix #2089: update the display of the text field for Preferred Languages on mobile phones.

I18n:

* Add Indonesian and Portuguese translations.

* Add a qqq.json file with explanations of translation keys.

* Add tests to verify keys in i18n json files.

* Fix #2117: add i18n for title of creator dashboard.

* Fix #2120: add i18n for the buttons on the Teach page.

* Fix #2121: remove unused keys from translation JSON files.

Other pages:

* Fix #2023: display the About page tabs correctly on small-width screens.

* Add a Donate page.

* Remove redundant /participate page, add redirect URLs, and add a new URL for the 'Contact us' page.

UI (general):

* Fix #2108: remove rounded corners from the select2 dropdown.

* Fix #2035: replace glyphicons with material icons.

* Fix #2091: adjust footer on smaller screens.

* Fix #1901: move terms/privacy links to the footer.

Rich-text components:

* Fix #1931: add caption functionality for images

Interactions:

* Fix #2074: for ItemSelectionInput, display the rule selections correctly.

* Fix #1740: for CodeRepl, start at the top of the code when initially displaying the Python coding window.

* InteractiveMap: fix width of map on narrow viewports.

Infrastructure and tests:

* Move the rules to a rules.json file that is accessible by both the frontend and backend.

* Fix #2047: add a performance testing framework.

* Remove obsolete configuration properties.

* Add a new task queue for backups.

* Fix #1857: add a flag allowing developers to enable minification on the dev server.

* Fix #1974: add pattern checks for ‘==’ and ‘!=’ in JavaScript files.

* Divide the editor e2e test suite into mainEditor and editorFeatures.

v2.3.0 (7 Jun 2016)

-------------------

Site-wide features:

* Add suppport for internationalization.

* Add title and meta descriptions.

* Fix #1845: add a warning if the user has disabled JavaScript.

* Fix #1900: correctly close the sidebar menu on mobile.

* Fix #1842: prevent the profile avatar dropping off the top of the page on small screens.

Splash/About pages:

* Add new About, Teach and Get Involved pages.

* Reverse the text and update the images in the lower half of the splash page.

* Redirect to the creator dashboard if the user logs in from the splash page.

* Use absolute paths for images on the splash page.

Library page:

* Add a recently-published group to the library index page.

* Add a top-rated group to the library index page.

* Add a banner and text to the top of the library index page.

* Add a footer to the library index page.

* Filter null explorations from showing up in the library index page.

* Fix #1456: create summary tiles for collections.

* Fix #1860: elongate exploration summary tiles to allow two lines of the exploration title to show.

* Fix #1840: fix the oval around the contributor icons in the exploration summary tiles.

* Remove avatars from the exploration summary tiles due to latency issues.

* Remove the on-hover indicator from the library carousel scroll button.

* Fix #1864: fix carousel behaviour when the user clicks on the scroll button multiple times in rapid succession.

* Fix #1911: fix incorrect carousel shadow height.

* Fix #1918: Prevent the site feedback button from being hidden in the library index page.

* Add new subject icons for Spanish and Gaulish.

Exploration editor:

* Add functionality for autosaving drafts.

* Allow jumping to a particular state in preview mode.

* Prompt for missing metadata fields just before publication.

* Streamline the saving flow for the various state properties.

* Refactor the parameter metadata computation into a separate service.

* Fix #1877: prevent the 'add new response' modal from exiting when a creator clicks outside it.

* Fix #1829: in the history tab, reduce the space between the committer's username and the exploration version.

* Fix #1894: prevent the category dropdown list from unnecessarily scrolling to the bottom.

* Remove the underline button from the rich-text editor toolbar.

* Remove the "nominate exploration" button from the editor settings page.

* Remove the 'missing objective' warning.

Collection editor:

* Introduce a new collection editor (currently in beta).

Creator dashboard:

* Rename 'My Explorations' to 'Creator Dashboard'.

* Fix #1954: add collection tiles to the creator dashboard.

* Fix #1696: introduce a modal for choosing which type of activity to create.

* Fix #1705: remove the old exploration creation modal.

Learner page:

* Fix #1489: make the learner view responsive.

* Fix #1881: remove unnecessary scroll bar.

* Fix #1814: remove unnecessary button styling and arrows in the tutor card.

* Fix #1815: place the tutor avatar above the supplemental card.

* Fix #1818: show the help card at the bottom of the viewport if the interaction is too tall.

* Fix jerky animation for showing previous answers.

* Fix #1816: fix single-card to double-card animation.

* Fix #1817: center the animation at the Oppia avatar position.

Interactions:

* ItemSelectionInput:

- Fix #1766: correctly initialize the notEnoughSelections flag.

Profile page:

* Fix #1793: allow the user to click on their profile image in order to edit it in their Preferences page.

* Fix #1826: show subject interests properly in Firefox.

Infrastructure and tests:

* Improve application performance by disabling debug data.

* Fix #1540: add tests for detecting bad patterns.

* Add a one-off test case to check the computation of exploration contributor summaries.

* Support setting CHROME_BIN to the Chromium browser path in Unix-based systems.

* Fix #1394: fix Python version check in setup.sh.

* Fix #1848: set the appropriate http_proxy environment variable if the user is on Vagrant.

* Increase the default memory in the Vagrantfile to 2048MB.

* Fix #1836: add a .gitattributes file to set proper EOL terminators.

* Tighten CSRF payload checks to correctly handle empty request data.

* Fix #1757: divide e2e tests into separate suites.

* Fix #1779: split e2e tests into separate suites on Travis-CI.

* Protractor bugfix: scroll to the top of the page before clicking on the state graph.

v2.2.0 (7 May 2016)

-------------------

Overall site design and navigation:

* Fix #1510: separate the library page from the splash page.

* Clicking on the logo at the top left redirects to the appropriate home page.

* Fix #1075: use material icons instead of glyphicons.

* Fix #1615: add a footer to all informational pages on the site

Splash page:

* Redesign the splash page.

Library page:

* Rename 'gallery' to 'library' throughout the codebase.

* Add an index page with explorations in different categories.

* Fix #1360: add a separate category for featured explorations.

* Fix #1681: redesign the number-of-contributors indicator on the exploration summary tiles.

* Create new category icons.

* Reduce the number of categories in the category dropdown menu.

* Add stable URLs for search result pages.

* Redesign the 'loading more results' indicator.

Editor page:

* Redesign the editor onboarding flow.

* Fix #1537: send an email when a user is granted new rights to an exploration.

* Fix (part of) #798: clarify the message shown when an interaction is missing.

* Fix #1679: in the editor view, prevent the feedback tab overlapping the sign-in menu.

* Reduce the widths of the editor tabs.

* Tidy up the save/publish button styling in the navbar.

* Fix #1676: remove the small gap between the "Save Draft" and "Discard Draft" buttons.

* Remove the visibility toggle for private explorations from the Settings tab.

* Fix a bug in getEditorTabContext() that resulted in incorrect detection of the editor preview mode.

* Fix #1788: correctly align parameter input fields in Firefox.

Learner page:

* Fix #1497: ensure that the inter-paragraph spacing behaves correctly.

* Fix #1678: prevent share links from being squashed in the information card.

Interactions:

* CodeRepl:

- Fix #1682: add an OutputContains rule.

- Fix #1671: make text highlighting visible.

- Fix #1767: add a 'test run' button.

- Fix a bug where the error message displayed in the user-facing console was not updated promptly.

Rich-text editor:

* Add indent/outdent functionality.

* Add block-style previews for some RTE components.

* Fix #914: remove the RTE icon resize handlebars in Firefox.

Profile page:

* Fix #1350: redesign the profile page to include a portfolio section and display responsively.

* Fix #1544: Fetch Gravatar images or identicons when a new user signs up.

Other pages:

* Fix #1703 (preferences page): fix the preferred languages dropdown width.

* Fix #1712 (admin page): add a navigation bar, and separate the page into different categories.

* "My explorations" page:

- Autofocus correctly when the 'create exploration' modal is opened.

- Redesign the page to be more useful to new creators.

- Show a more informative status ("Published" instead of "Good") for published explorations that have no unresolved feedback messages.

Developer workflow:

* Fix #995: add Protractor e2e tests to Travis-CI.

* Improve Travis-CI build times by caching specific directories.

* Fix #1717: enforce correct permissions on the node_modules/ dir in Vagrant.

Infrastructure and tests:

* Update protractor to 3.3.0.

* Fix #1434: replace deprecated $http.success & $http.error with $http.then.

* Fix #1369: add a domain layer for objects related to feedback threads.

* Fix #1729: add tests for summary_services.py.

* Add analytics events for buttons on the splash page, and for opening the 'publish exploration' modal.

v2.1.5 (3 Apr 2016)

-------------------

Overall site design and navigation:

* Fix #1347: redesign the navbar, and include a "create" button on more pages.

* Fix #1533: make "My Explorations" the homepage for logged-in users.

* Fix #1531: introduce an alertsService to display warnings and transitory info messages.

* Fix #1622: replace PNG images with icon fonts (where possible) to improve performance.

Gallery page:

* Fix #1617: add a "deselect all" option in the category and language selectors in the search bar.

* Fix #1550: return profile pictures together with the other data in the exploration summary tiles, in order to avoid multiple unnecessary fetches to the server.

* Fix #1543: for community-editable explorations, the first avatar in the exploration summary tile should be a globe.

* Fix #1668: reinstate the search loading indicator.

* Fix #1529: truncate long usernames in the gallery card tooltips so that they don't overflow.

* Create new directives for the search bar and the grid of exploration summary tiles.

Editor page:

* Fix #473: changing the rule type should preserve existing rule input fields, whenever possible.

* Fix #1613: after publishing, creators should be encouraged to share their explorations.

* Fix #1575: correctly restore the "Save Draft" button after the user tries to save changes that have no net effect.

* Fix #1656: fix alignment of status and state in feedback/suggestion threads.

* Fix #1370: show the number of open feedback/suggestion threads in the exploration editor navbar.

* Fix #1566: clicking the edit icons in the Oppia response editor should open up the response editor.

* Generate default rule input values in the backend and send these to the frontend, thus reducing the need for the core code to special-case on particular interaction ids.

* Fix #1536: within the multiple-choice option dropdown in the rule selector, images should not overlap.

* Partially address #1287: implement a storage layer to support auto-saving of drafts.

* Remove unnecessary two-way binding in the rule type dropdown selector.

Learner page:

* Fix #1637: prevent the feedback popup from overflowing off the screen.

* Increase the size of the first avatar on each exploration card.

* Adjust the progress-dot tooltips to point towards the left.

Interactions:

* CodeRepl: display underscores correctly in the code editor.

* ItemSelectionInput: make the UI more similar to that of MultipleChoiceInput.

* LogicProof: update the Angular reference in the JavaScript generating helper file.

* PencilCodeEditor: hide the Pencil Code error console.

* SetInput: remove the error that arises in the editor when trying to add an element to a rule input.

* SetInput: explicitly instruct the learner to add one item per line.

* TextInput: always show the "submit" button.

Rich-text editor:

* Fix #945: improve the rich-text editor performance by removing unnecessary internal $watch statements.

* Fix #448: redesign the icons for all the RTE components.

* Fix #1534: prevent long math LaTeX formulas from spilling out of the rule selector dropdown.

* Fix #1496: ensure that videos stay within their container when they are inserted into a Collapsible RTE component.

Collections:

* Fix #1564: make it possible to unpublish collections.

* Fix #1649: pass num_views to collection learner view

* Fix #1216: fix the display of the collection viewer tiles on small screens.

* Add collection editor frontend and backend controllers, so that the collection editor is fully functional.

Other pages:

* Fix #1288 (profile page): redesign the calculation of the impact score.

* Fix #1368 (notifications page): make the page display correctly on small screens.

* Fix #1628 ("my explorations" page): ensure that the "Unresolved Feedback" status message does not overflow the exploration card.

* Fix #1633 (about page): reinstate the missing "Oppia Foundation" anchor.

* Fix #1631 (privacy page): de-italicize the text in the sidebar.

Developer workflow:

* Install XVFB and adjust setup.sh to prepend xvfb-run to frontend test commands for developers who are using Vagrant.

* Fix #1568: add an error message if the GAE download via curl fails.

* Fix #1488: make the pre_push hook switch to the correct branch before linting.

* Update run_frontend_tests.sh to not run the minified tests by default, and add an optional flag to skip the installation process. These two flags together significantly speed up running the frontend tests.

* Fix #1643: report build status on gitter and IRC.

* Update the README to point to the new IRC channel.

Infrastructure and tests:

* Fix #1504: update textAngular to v1.4.5, and add Rangy (v1.3.0) as a third-party dependency.

* Fix #1416: guard against the backend sending duplicate emails.

* Fix #1579: introduce a standard naming scheme for example users in the Protractor tests.

* Add an analytics event for new signups.

* Remove all author tags from the codebase.

v2.1.4 (28 Feb 2016)

--------------------

Learner page:

* Fix #1471: show the exploration ID correctly in the embedding instructions.

Gallery page:

* Fix #1438: show contributors' icons on the gallery cards.

* Fix #1437: fix a race condition when searching in the gallery.

Rich-text components:

* Fix #1380: autoplay videos only if the learner is seeing them for the first time, and the video is in view.

* Fix #318: in the RTE, auto-prepend "https://" to links which don't specify a protocol.

* Fix #1466: prevent an error from occurring when spaces are typed into the link editor.

* Fix #1421: update MathJax to v2.6.0 to prevent the Math component from showing a black vertical bar on the right border.

* Fix #1432: MP4 video components used to load inconsistently; to avoid this, we now clear the 'src' tag after a video leaves the user's view to release memory and browser resources.

Editor page:

* Add an html-select-directive, so that LaTeX and images are displayed correctly in multiple choice options.

* Fix #1088: hide the feedback editor for the Continue Button interaction.

* Fix #1089: do not show a default warning for multiple-choice interactions if all choices have been catered for.

* Fix #1516: prevent a console error from arising when the first state's default answer group feedback is edited.

Infrastructure:

* Add full instructions for installing Oppia on Windows.

* Remove ComputedProperty construct in order to speed up requests.

* Add infrastructure for frontend event reporting.

* Replace the deprecated gulp-minify-css library with gulp-clean-css.

* Modify the pre-push hook to only trigger when a branch is pushed (and not when a tag is pushed or a branch is deleted).

* Add a max-line-length check to .pylintrc.

* Fix #1440: remove the activeInputData service from the frontend.

Demo explorations:

* Fix #1509: address warnings/errors in demo explorations.

Other:

* Add an ISSUE_TEMPLATE.md file to the root of the repository.

* Add a link to the Google Drive folder in CONTRIBUTING.md.

v2.1.3 (31 Jan 2016)

--------------------

Learner page:

* Allow learners to make suggestions for changes to exploration content.

* Fix #1279: Fix a bug where long usernames in the info card overflow the tooltip.

* Fix #1332: Show only 1 decimal place for ratings.

* Show 'Unrated' in the exploration information card when an exploration has no ratings.

Gallery page:

* Fix #918: Redesign the 'no search results found' message.

Interactions:

* ImageClickInput: fix misalignment of clickable regions.

* MusicNotesInput: move the logic from the controller to the link function.

* CodeRepl:

- Fix #1383: Allow imports in the learner’s code.

- Fix #1327: Show prepended and appended code.

- Gray out prepended and appended code sections.

* Add rules for the Graph interaction to check if a graph is regular, acyclic, strongly connected or weakly connected.

Editor page:

* Fix #1090: Change the rule feedback editor to only require either feedback or a new destination, and add a warning sign to the answer group if neither is specified.

* Fix #1255: Add a “Saving…” indicator after the 'Save Changes' button is clicked.

* Remove the need to specify icon data URLs manually for RTE components.

* Put a gray overlay over the state and interaction editors when they are hovered over.

* Change popover placement for the intro tutorial.

* Make history graph legend non-clickable.

* Fix overlapping buttons in exploration settings.

Infrastructure:

* Add a push hook that runs the linter and frontend tests.

* Add a script to simplify releases by summarizing authors, commit messages, and schema, setup script, and storage model changes.

* Add a job to compute the number of commits done by each contributor in each exploration.

* Skip the SDK update in the e2e tests script.

* Add parallelization to the linter.

* Split up the frontend player view into separate files.

* Add ‘OpenJDK’ (for Skulpt) and ‘unzip’ to the prerequisite-installation script.

* Remove frontend tests for displaying dates in users’ locales.

* Add a frontend service for computing expression output types.

Demo explorations:

* Add a new demo exploration which contains every interaction Oppia currently supports (for testing purposes).

* Remove the cities exploration.

* Update the demo explorations list to be explicitly mapped by id.

Other:

* Update contribution instructions in CONTRIBUTING.md.

v2.1.2 (6 Jan 2016)

-------------------

Gallery page:

* Reduce latency for fetching the data for the number of views of an exploration.

* Add a 'loading more...' message at the bottom of the gallery.

* Abbreviate the date shown in the gallery tiles.

* Reduce the size of the 'updated' tag on the gallery tiles.