Make issue boards height calculation clearer and remove magic numbers

app/assets/stylesheets/framework/contextual_sidebar.scss

@@ -9,7 +9,8 @@
     padding-left: $contextual-sidebar-width;
   }
 
-  .issues-bulk-update.right-sidebar.right-sidebar-expanded .issuable-sidebar-header {
+  .issues-bulk-update.right-sidebar.right-sidebar-expanded
+    .issuable-sidebar-header {
     padding: 10px 0 15px;
   }
 }
@@ -61,7 +62,8 @@
 }
 
 .nav-sidebar {
-  transition: width $sidebar-transition-duration, left $sidebar-transition-duration;
+  transition: width $sidebar-transition-duration,
+    left $sidebar-transition-duration;
   position: fixed;
   z-index: 400;
   width: $contextual-sidebar-width;
@@ -75,7 +77,7 @@
   &:not(.sidebar-collapsed-desktop) {
     @media (min-width: $screen-sm-min) and (max-width: $screen-md-max) {
       box-shadow: inset -2px 0 0 $border-color,
-                  2px 1px 3px $dropdown-shadow-color;
+        2px 1px 3px $dropdown-shadow-color;
     }
   }
 
@@ -234,7 +236,7 @@
           border-radius: 0 3px 3px 0;
 
           &::before {
-            content: "";
+            content: '';
             position: absolute;
             top: -30px;
             bottom: -30px;
@@ -305,7 +307,6 @@
   }
 }
 
-
 // Collapsed nav
 
 .toggle-sidebar-button,
@@ -454,18 +455,3 @@
     z-index: 300;
   }
 }
-
-
-// Make issue boards full-height now that sub-nav is gone
-
-.boards-list {
-  height: calc(100vh - #{$header-height});
-
-  @media (min-width: $screen-sm-min) {
-    height: calc(100vh - 180px);
-  }
-}
-
-.with-performance-bar .boards-list {
-  height: calc(100vh - #{$header-height} - #{$performance-bar-height});
-}

app/assets/stylesheets/framework/header.scss

@@ -184,7 +184,6 @@
   }
 
   .container-fluid {
-
     .navbar-nav {
       @media (max-width: $screen-xs-max) {
         display: -webkit-flex;
@@ -337,7 +336,7 @@
 .breadcrumbs {
   display: -webkit-flex;
   display: flex;
-  min-height: 48px;
+  min-height: $breadcrumb-min-height;
   color: $gl-text-color;
 }
 
@@ -466,7 +465,7 @@
       padding: 0 5px;
       line-height: 12px;
       border-radius: 7px;
-      box-shadow: 0 1px 0 rgba($gl-header-color, .2);
+      box-shadow: 0 1px 0 rgba($gl-header-color, 0.2);
 
       &.issues-count {
         background-color: $green-500;

app/assets/stylesheets/framework/variables.scss

@@ -5,9 +5,9 @@ $grid-size: 8px;
 $gutter_collapsed_width: 62px;
 $gutter_width: 290px;
 $gutter_inner_width: 250px;
-$sidebar-transition-duration: .3s;
+$sidebar-transition-duration: 0.3s;
 $sidebar-breakpoint: 1024px;
-$default-transition-duration: .15s;
+$default-transition-duration: 0.15s;
 $contextual-sidebar-width: 220px;
 $contextual-sidebar-collapsed-width: 50px;
 
@@ -129,7 +129,6 @@ $theme-green-800: #145d33;
 $theme-green-900: #0d4524;
 $theme-green-950: #072d16;
 
-
 $black: #000;
 $black-transparent: rgba(0, 0, 0, 0.3);
 $almost-black: #242424;
@@ -163,7 +162,7 @@ $gl-text-color-secondary: #707070;
 $gl-text-color-tertiary: #949494;
 $gl-text-color-quaternary: #d6d6d6;
 $gl-text-color-inverted: rgba(255, 255, 255, 1);
-$gl-text-color-secondary-inverted: rgba(255, 255, 255, .85);
+$gl-text-color-secondary-inverted: rgba(255, 255, 255, 0.85);
 $gl-text-color-disabled: #919191;
 $gl-text-green: $green-600;
 $gl-text-green-hover: $green-700;
@@ -262,6 +261,7 @@ $highlight-changes-color: rgb(235, 255, 232);
 $performance-bar-height: 35px;
 $flash-height: 52px;
 $context-header-height: 60px;
+$breadcrumb-min-height: 48px;
 
 /*
 * Common component specific colors
@@ -296,7 +296,7 @@ $tanuki-yellow: #fca326;
  */
 $gl-primary: $blue-500;
 $gl-success: $green-500;
-$gl-success-focus: rgba($gl-success, .4);
+$gl-success-focus: rgba($gl-success, 0.4);
 $gl-info: $blue-500;
 $gl-warning: $orange-500;
 $gl-danger: $red-500;
@@ -331,8 +331,11 @@ $diff-jagged-border-gradient-color: darken($white-normal, 8%);
 /*
  * Fonts
  */
-$monospace_font: 'Menlo', 'DejaVu Sans Mono', 'Liberation Mono', 'Consolas', 'Ubuntu Mono', 'Courier New', 'andale mono', 'lucida console', monospace;
-$regular_font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
+$monospace_font: 'Menlo', 'DejaVu Sans Mono', 'Liberation Mono', 'Consolas',
+  'Ubuntu Mono', 'Courier New', 'andale mono', 'lucida console', monospace;
+$regular_font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
+  Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif,
+  'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';
 
 /*
 * Dropdowns
@@ -343,16 +346,16 @@ $dropdown-max-height: 312px;
 $dropdown-vertical-offset: 4px;
 $dropdown-link-color: #555;
 $dropdown-link-hover-bg: $row-hover;
-$dropdown-empty-row-bg: rgba(#000, .04);
+$dropdown-empty-row-bg: rgba(#000, 0.04);
 $dropdown-border-color: $border-color;
-$dropdown-shadow-color: rgba(#000, .1);
-$dropdown-divider-color: rgba(#000, .1);
+$dropdown-shadow-color: rgba(#000, 0.1);
+$dropdown-divider-color: rgba(#000, 0.1);
 $dropdown-title-btn-color: #bfbfbf;
 $dropdown-input-color: #555;
 $dropdown-input-fa-color: #c7c7c7;
 $dropdown-input-focus-border: $focus-border-color;
-$dropdown-input-focus-shadow: rgba($dropdown-input-focus-border, .4);
-$dropdown-loading-bg: rgba(#fff, .6);
+$dropdown-input-focus-shadow: rgba($dropdown-input-focus-border, 0.4);
+$dropdown-loading-bg: rgba(#fff, 0.6);
 $dropdown-chevron-size: 10px;
 $dropdown-toggle-active-border-color: darken($border-color, 14%);
 $dropdown-item-hover-bg: $gray-darker;
@@ -367,9 +370,9 @@ $dropdown-hover-color: $blue-400;
 /*
 * Contextual Sidebar
 */
-$link-active-background: rgba(0, 0, 0, .04);
-$link-hover-background: rgba(0, 0, 0, .06);
-$inactive-badge-background: rgba(0, 0, 0, .08);
+$link-active-background: rgba(0, 0, 0, 0.04);
+$link-hover-background: rgba(0, 0, 0, 0.06);
+$inactive-badge-background: rgba(0, 0, 0, 0.08);
 
 /*
 * Buttons
@@ -397,14 +400,14 @@ $status-icon-margin: $gl-btn-padding;
 /*
  *  Award emoji
  */
-$award-emoji-menu-shadow: rgba(0, 0, 0, .175);
+$award-emoji-menu-shadow: rgba(0, 0, 0, 0.175);
 $award-emoji-positive-add-bg: #fed159;
 $award-emoji-positive-add-lines: #bb9c13;
 
 /*
  * Search Box
  */
-$search-input-border-color: rgba($blue-400, .8);
+$search-input-border-color: rgba($blue-400, 0.8);
 $search-input-focus-shadow-color: $dropdown-input-focus-shadow;
 $search-input-width: 220px;
 $location-badge-active-bg: $blue-500;
@@ -429,7 +432,7 @@ $zen-control-color: #555;
 * Calendar
 */
 $calendar-hover-bg: #ecf3fe;
-$calendar-border-color: rgba(#000, .1);
+$calendar-border-color: rgba(#000, 0.1);
 $calendar-user-contrib-text: #959494;
 
 /*
@@ -452,6 +455,17 @@ $ci-skipped-color: #888;
 */
 $issue-boards-font-size: 14px;
 $issue-boards-card-shadow: rgba(186, 186, 186, 0.5);
+/*
+ The following heights are used in boards.scss and are used for calculation of the board height.
+ They probably should be derived in a smarter way.
+*/
+$issue-boards-filter-height: 68px;
+$issue-boards-breadcrumbs-height-xs: 63px;
+$issue-board-list-difference-xs: $header-height +
+  $issue-boards-breadcrumbs-height-xs;
+$issue-board-list-difference-sm: $header-height + $breadcrumb-min-height;
+$issue-board-list-difference-md: $issue-board-list-difference-sm +
+  $issue-boards-filter-height;
 
 /*
 * Avatar
@@ -567,14 +581,14 @@ $label-padding: 7px;
 $label-padding-modal: 10px;
 $label-gray-bg: #f8fafc;
 $label-inverse-bg: #333;
-$label-remove-border: rgba(0, 0, 0, .1);
+$label-remove-border: rgba(0, 0, 0, 0.1);
 $label-border-radius: 100px;
 
 /*
 * Animation
 */
 $fade-in-duration: 200ms;
-$fade-mask-transition-duration: .1s;
+$fade-mask-transition-duration: 0.1s;
 $fade-mask-transition-curve: ease-in-out;
 
 /*
@@ -642,7 +656,6 @@ $stat-graph-selection-stroke: #333;
 $select2-drop-shadow1: rgba(76, 86, 103, 0.247059);
 $select2-drop-shadow2: rgba(31, 37, 50, 0.317647);
 
-
 /*
 * Todo
 */
@@ -679,7 +692,6 @@ CI variable lists
 */
 $ci-variable-remove-button-width: calc(1em + #{2 * $gl-padding});
 
-
 /*
 Filtered Search
 */
@@ -706,7 +718,14 @@ Repo editor
 */
 $repo-editor-grey: #f6f7f9;
 $repo-editor-grey-darker: #e9ebee;
-$repo-editor-linear-gradient: linear-gradient(to right, $repo-editor-grey 0%, $repo-editor-grey-darker, 20%, $repo-editor-grey 40%, $repo-editor-grey 100%);
+$repo-editor-linear-gradient: linear-gradient(
+  to right,
+  $repo-editor-grey 0%,
+  $repo-editor-grey-darker,
+  20%,
+  $repo-editor-grey 40%,
+  $repo-editor-grey 100%
+);
 
 /*
 Performance Bar
@@ -717,8 +736,8 @@ $perf-bar-staging: #291430;
 $perf-bar-development: #4c1210;
 $perf-bar-bucket-bg: #111;
 $perf-bar-bucket-color: #ccc;
-$perf-bar-bucket-box-shadow-from: rgba($white-light, .2);
-$perf-bar-bucket-box-shadow-to: rgba($black, .25);
+$perf-bar-bucket-box-shadow-from: rgba($white-light, 0.2);
+$perf-bar-bucket-box-shadow-to: rgba($black, 0.25);
 
 /*
 Issuable warning

app/assets/stylesheets/pages/boards.scss

-@import "./issues/issue_count_badge";
+@import './issues/issue_count_badge';
 
 [v-cloak] {
   display: none;
@@ -72,22 +72,37 @@
 }
 
 .boards-list {
-  height: calc(100vh - 105px);
+  height: calc(100vh - #{$issue-board-list-difference-xs});
   width: 100%;
-  padding-top: 25px;
-  padding-bottom: 25px;
-  padding-right: ($gl-padding / 2);
-  padding-left: ($gl-padding / 2);
+  padding: $gl-padding ($gl-padding / 2);
   overflow-x: scroll;
   white-space: nowrap;
+  min-height: 200px;
 
   @media (min-width: $screen-sm-min) and (max-width: $screen-sm-max) {
-    height: calc(100vh - 90px);
+    height: calc(100vh - #{$issue-board-list-difference-sm});
   }
 
   @media (min-width: $screen-md-min) {
-    height: calc(100vh - 160px);
-    min-height: 475px;
+    height: calc(100vh - #{$issue-board-list-difference-md});
+  }
+
+  .with-performance-bar & {
+    height: calc(
+      100vh - #{$issue-board-list-difference-xs} - #{$performance-bar-height}
+    );
+
+    @media (min-width: $screen-sm-min) and (max-width: $screen-sm-max) {
+      height: calc(
+        100vh - #{$issue-board-list-difference-sm} - #{$performance-bar-height}
+      );
+    }
+
+    @media (min-width: $screen-md-min) {
+      height: calc(
+        100vh - #{$issue-board-list-difference-md} - #{$performance-bar-height}
+      );
+    }
   }
 }
 
@@ -454,7 +469,7 @@
   &.boards-sidebar-slide-enter-active,
   &.boards-sidebar-slide-leave-active {
     transition: width $sidebar-transition-duration,
-                padding $sidebar-transition-duration;
+      padding $sidebar-transition-duration;
   }
 
   &.boards-sidebar-slide-enter,
@@ -473,7 +488,7 @@
   right: 0;
   bottom: 0;
   left: 0;
-  background-color: rgba($black, .3);
+  background-color: rgba($black, 0.3);
   z-index: 9999;
 }
 
@@ -490,7 +505,7 @@
   padding: 25px 15px 0;
   background-color: $white-light;
   border-radius: $border-radius-default;
-  box-shadow: 0 2px 12px rgba($black, .5);
+  box-shadow: 0 2px 12px rgba($black, 0.5);
 
   .empty-state {
     display: -webkit-flex;
@@ -568,7 +583,7 @@
 
   .card {
     border: 1px solid $border-gray-dark;
-    box-shadow: 0 1px 2px rgba($issue-boards-card-shadow, .3);
+    box-shadow: 0 1px 2px rgba($issue-boards-card-shadow, 0.3);
     cursor: pointer;
   }
 }