[#1929] Add dynamic positioning support for tooltips (#2056)

Currently, most tooltips are shown above buttons and text. 
When these tooltips appear at the top of the viewport, 
part of the tooltips will not be rendered.

Let's implement changes such that these tooltips appear below the
text or button, when appearing at the top of the viewport.

frontend/src/components/c-summary-charts.vue

@@ -21,89 +21,119 @@
           v-bind:class=" { warn: repo[0].name === '-' }"
         ) {{ getAuthorDisplayName(repo) }} ({{ repo[0].name }})
       .summary-charts__title--contribution
-        .tooltip
+        .tooltip(
+          v-on:mouseover="onTooltipHover(`summary-charts-${i}-total-contribution`)",
+          v-on:mouseout="resetTooltip(`summary-charts-${i}-total-contribution`)"
+        )
           | [{{ getGroupTotalContribution(repo) }} lines]
           span.tooltip-text(
             v-if="filterGroupSelection === 'groupByRepos' && !isChartGroupWidgetMode"
-          ) Total contribution of group
+          )(v-bind:ref="`summary-charts-${i}-total-contribution`") Total contribution of group
           span.tooltip-text(
             v-else-if="filterGroupSelection === 'groupByAuthors' && !isChartGroupWidgetMode"
-          ) Total contribution of author
+          )(v-bind:ref="`summary-charts-${i}-total-contribution`") Total contribution of author
       a(
         v-if="!isGroupMerged(getGroupName(repo)) && !isChartGroupWidgetMode",
         v-on:click="handleMergeGroup(getGroupName(repo))"
       )
-        .tooltip
+        .tooltip(
+          v-on:mouseover="onTooltipHover(`summary-charts-${i}-merge-group`)",
+          v-on:mouseout="resetTooltip(`summary-charts-${i}-merge-group`)"
+        )
           font-awesome-icon.icon-button(:icon="['fas', 'chevron-up']")
-          span.tooltip-text Click to merge group
+          span.tooltip-text(v-bind:ref="`summary-charts-${i}-merge-group`") Click to merge group
       a(
         v-if="isGroupMerged(getGroupName(repo)) && !isChartGroupWidgetMode",
         v-on:click="handleExpandGroup(getGroupName(repo))"
       )
-        .tooltip
+        .tooltip(
+          v-on:mouseover="onTooltipHover(`summary-charts-${i}-expand-group`)",
+          v-on:mouseout="resetTooltip(`summary-charts-${i}-expand-group`)"
+        )
           font-awesome-icon.icon-button(:icon="['fas', 'chevron-down']")
-          span.tooltip-text Click to expand group
+          span.tooltip-text(v-bind:ref="`summary-charts-${i}-expand-group`") Click to expand group
       a(
         v-if="filterGroupSelection === 'groupByRepos'",
         v-bind:class="!isBrokenLink(getRepoLink(repo[0])) ? '' : 'broken-link'",
         v-bind:href="getRepoLink(repo[0])", target="_blank"
       )
-        .tooltip
+        .tooltip(
+          v-on:mouseover="onTooltipHover(`summary-charts-${i}-repo-link`)",
+          v-on:mouseout="resetTooltip(`summary-charts-${i}-repo-link`)"
+        )
           font-awesome-icon.icon-button(:icon="getRepoIcon(repo[0])")
           span.tooltip-text(
             v-if="!isChartGroupWidgetMode",
+            v-bind:ref="`summary-charts-${i}-repo-link`"
           ) {{getGroupRepoLinkMessage(repo[0])}}
       a(
         v-else-if="filterGroupSelection === 'groupByAuthors'",
         v-bind:class="!isBrokenLink(getAuthorProfileLink(repo[0], repo[0].name)) ? '' : 'broken-link'",
         v-bind:href="getAuthorProfileLink(repo[0], repo[0].name)", target="_blank"
       )
-        .tooltip
+        .tooltip(
+          v-on:mouseover="onTooltipHover(`summary-charts-${i}-author-link`)",
+          v-on:mouseout="resetTooltip(`summary-charts-${i}-author-link`)"
+        )
           font-awesome-icon.icon-button(icon="user")
           span.tooltip-text(
             v-if="!isChartGroupWidgetMode",
+            v-bind:ref="`summary-charts-${i}-author-link`"
           ) {{getAuthorProfileLinkMessage(repo[0])}}
       template(v-if="isGroupMerged(getGroupName(repo))")
         a(
           v-if="filterGroupSelection !== 'groupByAuthors' && !isChartGroupWidgetMode",
           onclick="deactivateAllOverlays()",
           v-on:click="openTabAuthorship(repo[0], repo, 0, isGroupMerged(getGroupName(repo)))"
         )
-          .tooltip
+          .tooltip(
+            v-on:mouseover="onTooltipHover(`summary-charts-${i}-group-code`)",
+            v-on:mouseout="resetTooltip(`summary-charts-${i}-group-code`)"
+          )
             font-awesome-icon.icon-button(
               icon="code",
               v-bind:class="{ 'active-icon': isSelectedTab(repo[0].name, repo[0].repoName, 'authorship', true) }"
             )
-            span.tooltip-text Click to view group's code
+            span.tooltip-text(v-bind:ref="`summary-charts-${i}-group-code`") Click to view group's code
         a(
           v-if="!isChartGroupWidgetMode",
           onclick="deactivateAllOverlays()",
           v-on:click="openTabZoom(repo[0], filterSinceDate, filterUntilDate, isGroupMerged(getGroupName(repo)))"
         )
-          .tooltip
+          .tooltip(
+            v-on:mouseover="onTooltipHover(`summary-charts-${i}-commit-breakdown`)",
+            v-on:mouseout="resetTooltip(`summary-charts-${i}-commit-breakdown`)"
+          )
             font-awesome-icon.icon-button(
               icon="list-ul",
               v-bind:class="{ 'active-icon': isSelectedTab(repo[0].name, repo[0].repoName, 'zoom', true) }"
             )
-            span.tooltip-text Click to view breakdown of commits
+            span.tooltip-text(v-bind:ref="`summary-charts-${i}-commit-breakdown`") Click to view breakdown of commits
       a(
         v-if="isChartGroupWidgetMode && !isChartWidgetMode",
         v-bind:href="getReportLink()", target="_blank"
       )
-        .tooltip
+        .tooltip(
+          v-on:mouseover="onTooltipHover(`summary-charts-${i}-commit-breakdown-group-widget`)",
+          v-on:mouseout="resetTooltip(`summary-charts-${i}-commit-breakdown-group-widget`)"
+        )
           font-awesome-icon.icon-button(
             icon="arrow-up-right-from-square",
           )
           span.tooltip-text(
             v-if="!isChartGroupWidgetMode",
+            v-bind:ref="`summary-charts-${i}-commit-breakdown-group-widget`"
           ) Click to view breakdown of commits on RepoSense
       a(
         v-if="!isChartGroupWidgetMode",
         v-on:click="getEmbeddedIframe(i)"
       )
-        .tooltip(v-bind:id="'tooltip-' + i")
+        .tooltip(v-bind:id="'tooltip-' + i",
+          v-on:mouseover="onTooltipHover(`summary-charts-${i}-copy-iframe`)",
+          v-on:mouseout="resetTooltip(`summary-charts-${i}-copy-iframe`)"
+        )
           font-awesome-icon.icon-button(icon="clipboard")
-          span.tooltip-text Click to copy iframe link for group
+          span.tooltip-text(v-bind:ref="`summary-charts-${i}-copy-iframe`") Click to copy iframe link for group
 
       .tooltip.summary-chart__title--percentile(
           v-if="sortGroupSelection.includes('totalCommits')"
@@ -143,61 +173,87 @@
           v-bind:class="!isBrokenLink(getRepoLink(user)) ? '' : 'broken-link'",
           v-bind:href="getRepoLink(user)", target="_blank"
         )
-          .tooltip
+          .tooltip(
+            v-on:mouseover="onTooltipHover(`repo-${i}-author-${j}-repo-link`)",
+            v-on:mouseout="resetTooltip(`repo-${i}-author-${j}-repo-link`)"
+          )
             font-awesome-icon.icon-button(:icon="getRepoIcon(repo[0])")
             span.tooltip-text(
               v-if="!isChartGroupWidgetMode",
+              v-bind:ref="`repo-${i}-author-${j}-repo-link`"
             ) {{getRepoLinkMessage(user)}}
         a(
           v-if="filterGroupSelection !== 'groupByAuthors'",
           v-bind:class="!isBrokenLink(getAuthorProfileLink(user, user.name)) ? '' : 'broken-link'",
           v-bind:href="getAuthorProfileLink(user, user.name)", target="_blank"
         )
-          .tooltip
+          .tooltip(
+            v-on:mouseover="onTooltipHover(`repo-${i}-author-${j}-author-link`)",
+            v-on:mouseout="resetTooltip(`repo-${i}-author-${j}-author-link`)"
+          )
             font-awesome-icon.icon-button(icon="user")
             span.tooltip-text(
               v-if="!isChartGroupWidgetMode",
+              v-bind:ref="`repo-${i}-author-${j}-author-link`"
             ) {{getAuthorProfileLinkMessage(user)}}
         a(
           v-if="!isChartGroupWidgetMode",
           onclick="deactivateAllOverlays()",
           v-on:click="openTabAuthorship(user, repo, j, isGroupMerged(getGroupName(repo)))"
         )
-          .tooltip
+          .tooltip(
+            v-on:mouseover="onTooltipHover(`repo-${i}-author-${j}-author-contribution`)",
+            v-on:mouseout="resetTooltip(`repo-${i}-author-${j}-author-contribution`)"
+          )
             font-awesome-icon.icon-button(
               icon="code",
               v-bind:class="{ 'active-icon': isSelectedTab(user.name, user.repoName, 'authorship', false) }"
             )
-            span.tooltip-text Click to view author's contribution.
+            span.tooltip-text(
+              v-bind:ref="`repo-${i}-author-${j}-author-contribution`"
+              ) Click to view author's contribution.
         a(
           v-if="!isChartGroupWidgetMode",
           onclick="deactivateAllOverlays()",
           v-on:click="openTabZoom(user, filterSinceDate, filterUntilDate, isGroupMerged(getGroupName(repo)))"
         )
-          .tooltip
+          .tooltip(
+            v-on:mouseover="onTooltipHover(`repo-${i}-author-${j}-commit-breakdown`)",
+            v-on:mouseout="resetTooltip(`repo-${i}-author-${j}-commit-breakdown`)"
+          )
             font-awesome-icon.icon-button(
               icon="list-ul",
               v-bind:class="{ 'active-icon': isSelectedTab(user.name, user.repoName, 'zoom', false) }"
             )
-            span.tooltip-text Click to view breakdown of commits
+            span.tooltip-text(
+              v-bind:ref="`repo-${i}-author-${j}-commit-breakdown`"
+            ) Click to view breakdown of commits
         a(
           v-if="isChartGroupWidgetMode",
           v-bind:href="getReportLink()", target="_blank"
         )
-          .tooltip
+          .tooltip(
+            v-on:mouseover="onTooltipHover(`repo-${i}-author-${j}-commit-breakdown-group-widget`)",
+            v-on:mouseout="resetTooltip(`repo-${i}-author-${j}-commit-breakdown-group-widget`)"
+          )
             font-awesome-icon.icon-button(
               icon="arrow-up-right-from-square",
             )
             span.tooltip-text(
               v-if="!isChartGroupWidgetMode",
+              v-bind:ref="`repo-${i}-author-${j}-commit-breakdown-group-widget`"
             ) Click to view breakdown of commits on RepoSense
         a(
           v-if="!isChartGroupWidgetMode",
           v-on:click="getEmbeddedIframe(i , j)"
         )
-          .tooltip(v-bind:id="'tooltip-' + i + '-' + j")
+          .tooltip(
+            v-bind:id="'tooltip-' + i + '-' + j",
+            v-on:mouseover="onTooltipHover(`repo-${i}-author-${j}-iframe-link`)",
+            v-on:mouseout="resetTooltip(`repo-${i}-author-${j}-iframe-link`)"
+          )
             font-awesome-icon.icon-button(icon="clipboard")
-            span.tooltip-text Click to copy iframe link
+            span.tooltip-text(v-bind:ref="`repo-${i}-author-${j}-iframe-link`") Click to copy iframe link
         .tooltip.summary-chart__title--percentile(
           v-if="filterGroupSelection === 'groupByNone' && sortGroupSelection.includes('totalCommits')"
         ) {{ getPercentile(j) }} %&nbsp
@@ -239,6 +295,7 @@ import { defineComponent } from 'vue';
 import { mapState } from 'vuex';
 
 import brokenLinkDisabler from '../mixin/brokenLinkMixin';
+import tooltipPositioner from '../mixin/dynamicTooltipMixin';
 import cRamp from './c-ramp.vue';
 import cStackedBarChart from './c-stacked-bar-chart.vue';
 import { Bar, Repo, User } from '../types/types';
@@ -252,7 +309,7 @@ export default defineComponent({
     cRamp,
     cStackedBarChart,
   },
-  mixins: [brokenLinkDisabler],
+  mixins: [brokenLinkDisabler, tooltipPositioner],
   props: {
     checkedFileTypes: {
       type: Array<string>,

frontend/src/mixin/dynamicTooltipMixin.ts

@@ -0,0 +1,19 @@
+import { defineComponent } from 'vue';
+
+export default defineComponent({
+  methods: {
+    onTooltipHover(refName: string): void {
+      const tooltipTextElement = (this.$refs[refName] as HTMLElement[])[0];
+      if (this.isElementAboveViewport(tooltipTextElement)) {
+        tooltipTextElement.classList.add('bottom-aligned');
+      }
+    },
+    resetTooltip(refName: string): void {
+      const tooltipTextElement = (this.$refs[refName] as HTMLElement[])[0];
+      tooltipTextElement.classList.remove('bottom-aligned');
+    },
+    isElementAboveViewport(el: Element): boolean {
+      return el.getBoundingClientRect().top <= 0;
+    },
+  },
+});

frontend/src/views/c-authorship.vue

@@ -148,18 +148,28 @@
               v-bind:class="!isBrokenLink(getHistoryLink(file)) ? '' : 'broken-link'",
               v-bind:href="getHistoryLink(file)", target="_blank"
             )
-              .tooltip
+              .tooltip(
+                v-on:mouseover="onTooltipHover(`${file.path}-view-history-tooltip`)",
+                v-on:mouseout="resetTooltip(`${file.path}-view-history-tooltip`)"
+              )
                 font-awesome-icon.button(icon="history")
-                span.tooltip-text {{getLinkMessage(getHistoryLink(file), 'Click to view the history view of file')}}
+                span.tooltip-text(
+                  v-bind:ref="`${file.path}-view-history-tooltip`"
+                ) {{getLinkMessage(getHistoryLink(file), 'Click to view the history view of file')}}
             a(
               v-if='!file.isBinary',
               v-bind:class="!isBrokenLink(getBlameLink(file)) ? '' : 'broken-link'",
               v-bind:href="getBlameLink(file)", target="_blank",
               title="click to view the blame view of file"
             )
-              .tooltip
+              .tooltip(
+                v-on:mouseover="onTooltipHover(`${file.path}-view-blame-tooltip`)",
+                v-on:mouseout="resetTooltip(`${file.path}-view-blame-tooltip`)"
+              )
                 font-awesome-icon.button(icon="user-edit")
-                span.tooltip-text {{getLinkMessage(getBlameLink(file), 'Click to view the blame view of file')}}
+                span.tooltip-text(
+                  v-bind:ref="`${file.path}-view-blame-tooltip`"
+                ) {{getLinkMessage(getBlameLink(file), 'Click to view the blame view of file')}}
           .author-breakdown(v-if="info.isMergeGroup")
             .author-breakdown__legend(
               v-for="author in getAuthors(file)",
@@ -186,6 +196,7 @@ import { defineComponent } from 'vue';
 import { mapState } from 'vuex';
 import minimatch from 'minimatch';
 import brokenLinkDisabler from '../mixin/brokenLinkMixin';
+import tooltipPositioner from '../mixin/dynamicTooltipMixin';
 import cSegmentCollection from '../components/c-segment-collection.vue';
 import Segment from '../utils/segment';
 import getNonRepeatingColor from '../utils/random-color-generator';
@@ -229,7 +240,7 @@ export default defineComponent({
   components: {
     cSegmentCollection,
   },
-  mixins: [brokenLinkDisabler],
+  mixins: [brokenLinkDisabler, tooltipPositioner],
   emits: [
     'deactivate-tab',
   ],
@@ -488,22 +499,6 @@ export default defineComponent({
       }
     },
 
-    onTooltipHover(refName: string): void {
-      const tooltipTextElement = (this.$refs[refName] as HTMLElement[])[0];
-      if (this.isElementAboveViewport(tooltipTextElement)) {
-        tooltipTextElement.classList.add('bottom-aligned');
-      }
-    },
-
-    resetTooltip(refName: string): void {
-      const tooltipTextElement = (this.$refs[refName] as HTMLElement[])[0];
-      tooltipTextElement.classList.remove('bottom-aligned');
-    },
-
-    isElementAboveViewport(el: Element): boolean {
-      return el.getBoundingClientRect().top <= 0;
-    },
-
     isUnknownAuthor(name: string): boolean {
       return name === '-';
     },

frontend/src/views/c-zoom.vue

@@ -126,9 +126,14 @@
         v-if="slice.messageBody !== ''",
         v-on:click="toggleSelectedCommitMessageBody(slice)"
       )
-        .tooltip
+        .tooltip(
+          v-on:mouseover="onTooltipHover(`${slice.hash}-show-hide-message-body`)",
+          v-on:mouseout="resetTooltip(`${slice.hash}-show-hide-message-body`)"
+        )
           font-awesome-icon.commit-message--button(icon="ellipsis-h")
-          span.tooltip-text Click to show/hide the commit message body
+          span.tooltip-text(
+            v-bind:ref="`${slice.hash}-show-hide-message-body`"
+            ) Click to show/hide the commit message body
       .body(v-if="slice.messageBody !== ''", v-show="slice.isOpen")
         pre {{ slice.messageBody }}
           .dashed-border
@@ -145,6 +150,7 @@ import { defineComponent } from 'vue';
 import { mapState } from 'vuex';
 import { FontAwesomeIcon } from '@fortawesome/vue-fontawesome';
 import brokenLinkDisabler from '../mixin/brokenLinkMixin';
+import tooltipPositioner from '../mixin/dynamicTooltipMixin';
 import cRamp from '../components/c-ramp.vue';
 import cStackedBarChart from '../components/c-stacked-bar-chart.vue';
 import User from '../utils/user';
@@ -177,7 +183,7 @@ export default defineComponent({
     cRamp,
     cStackedBarChart,
   },
-  mixins: [brokenLinkDisabler],
+  mixins: [brokenLinkDisabler, tooltipPositioner],
   data() {
     return {
       ...zoomInitialState(),