Merge style rules related to EventTile on IRC layout (#10700)

* Manage rules related to EventTile on `_EventTile.pcss`

The style rules with the selector "mx_EventTile" should be managed on _EventTile.pcss.

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Merge - `--EventTile_irc_line_info-margin-inline-start`

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Merge - `mx_EventTile_msgOption`

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Merge - `mx_MessageTimestamp`

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Merge - `mx_EventTileBubble`

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Merge - `mx_ReplyChain`

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Merge - `mx_ReplyTile .mx_EventTileBubble`

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Merge - `&.mx_EventTile_isEditing > .mx_EventTile_line`

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Merge - `&.mx_EventTile_info`

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Convert the variable with a custom property

To fix the syntax error "Undefined variable $irc-line-height" because of cascading order.

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

* Merge - '.mx_EventTile_emote'

The class is both specified by the const 'classes' (for classNames of mx_EventTile) and const 'lineClasses' (for mx_EventTile_line), but it is irrelevant here because the style rule does not expect mx_EventTile_avatar to be a direct descendant. In other words, both ".mx_EventTile.mx_EventTile_emote" and ".mx_EventTile .mx_EventTile_emote" are accepted.

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

---------

Signed-off-by: Suguru Hirahara <luixxiul@users.noreply.github.com>

cypress/e2e/timeline/timeline.spec.ts

@@ -207,7 +207,7 @@ describe("Timeline", () => {
             cy.get(".mx_GenericEventListSummary[data-layout=irc] .mx_GenericEventListSummary_spacer").should(
                 "have.css",
                 "line-height",
-                "18px", // $irc-line-height: $font-18px (See: _IRCLayout.pcss)
+                "18px", // var(--irc-line-height): $font-18px (See: _IRCLayout.pcss)
             );
 
             cy.get(".mx_MainSplit").percySnapshotElement("Expanded GELS on IRC layout", { percyCSS });

res/css/views/rooms/_EventTile.pcss

@@ -281,22 +281,156 @@ $left-gutter: 64px;
     }
 
     &[data-layout="irc"] {
+        --EventTile_irc_line-padding-block: 1px;
+
         /* add --right-padding value of MessageTimestamp only */
         /* stylelint-disable-next-line declaration-colon-space-after */
         --EventTile_irc_line_info-margin-inline-start: calc(
             var(--name-width) + var(--icon-width) + 1 * var(--right-padding)
         );
 
+        display: flex;
+        align-items: flex-start;
+        padding-top: 0;
+
+        > a {
+            text-decoration: none; /* timestamps are links which shouldn't be underlined */
+            min-width: $MessageTimestamp_width; /* ensure space for EventTile without timestamp */
+        }
+
+        > * {
+            margin-right: var(--right-padding);
+        }
+
+        .mx_EventTile_avatar,
+        .mx_EventTile_e2eIcon {
+            height: var(--irc-line-height);
+        }
+
+        .mx_EventTile_avatar,
+        .mx_DisambiguatedProfile,
+        .mx_EventTile_e2eIcon,
         .mx_EventTile_msgOption {
-            .mx_ReadReceiptGroup {
+            flex-shrink: 0;
-                inset-block-start: -0.3rem; /* ($irc-line-height - avatar height) / 2 */
+        }
+
+        .mx_EventTile_avatar {
+            order: 1;
+            position: relative;
+            display: flex;
+            align-items: center;
+
+            /* Need to use important to override the js provided height and width values. */
+            > .mx_BaseAvatar,
+            > .mx_BaseAvatar > * {
+                height: $font-14px !important;
+                width: $font-14px !important;
+                font-size: $font-10px !important;
+                line-height: $font-15px !important;
             }
         }
 
+        .mx_DisambiguatedProfile {
+            order: 2;
+            width: var(--name-width);
+            margin-inline-end: 0; /* override mx_EventTile > * */
+
+            > .mx_DisambiguatedProfile_displayName {
+                width: 100%;
+                text-align: end;
+                overflow: hidden;
+                text-overflow: ellipsis;
+            }
+
+            > .mx_DisambiguatedProfile_mxid {
+                visibility: collapse;
+                margin-left: 0; /* Override the inherited margin. */
+                padding: 0 5px; /* TODO: Use a spacing variable */
+            }
+
+            &:hover {
+                overflow: visible;
+                z-index: 10;
+
+                > .mx_DisambiguatedProfile_displayName {
+                    overflow: visible;
+                    display: inline;
+                    background-color: $event-selected-color;
+                    border-radius: 8px 0 0 8px;
+                    padding-right: $spacing-8;
+                }
+
+                > .mx_DisambiguatedProfile_mxid {
+                    visibility: visible;
+                    opacity: 1;
+                    background-color: $event-selected-color;
+                }
+            }
+        }
+
+        .mx_EventTile_e2eIcon {
+            padding: 0;
+            flex-grow: 0;
+            background-position: center;
+        }
+
+        .mx_EventTile_line {
+            .mx_EventTile_e2eIcon,
+            .mx_TextualEvent,
+            .mx_ViewSourceEvent,
+            .mx_MTextBody {
+                /* add a 1px padding top and bottom because our larger
+                emoji font otherwise gets cropped by anti-zalgo */
+                padding: var(--EventTile_irc_line-padding-block) 0;
+            }
+
+            .mx_EventTile_e2eIcon,
+            .mx_TextualEvent,
+            .mx_MTextBody {
+                display: inline-block;
+            }
+
+            .mx_ReplyTile {
+                .mx_MTextBody {
+                    display: -webkit-box; /* Enable -webkit-line-clamp */
+                }
+            }
+        }
+
+        .mx_EventTile_line,
+        .mx_EventTile_reply {
+            order: 3;
+            display: flex;
+            flex-direction: column;
+            flex-grow: 1;
+            flex-shrink: 1;
+            min-width: 0;
+        }
+
+        .mx_EventTile_reply {
+            order: 4;
+        }
+
+        .mx_EventTile_msgOption {
+            order: 5;
+
+            .mx_ReadReceiptGroup {
+                inset-block-start: -0.3rem; /* (var(--irc-line-height) - avatar height) / 2 */
+            }
+        }
+
+        .mx_ReplyChain {
+            margin: 0;
+        }
+
         .mx_MessageTimestamp {
             text-align: right;
         }
 
+        .mx_EditMessageComposer_buttons {
+            position: relative;
+        }
+
         .mx_EventTileBubble {
             position: relative;
             left: var(--EventTile_irc_line_info-margin-inline-start);
@@ -306,10 +440,6 @@ $left-gutter: 64px;
             }
         }
 
-        .mx_ReplyChain {
-            margin: 0;
-        }
-
         .mx_ReplyTile .mx_EventTileBubble {
             left: unset; /* Cancel the value specified above for the tile inside ReplyTile */
         }
@@ -332,6 +462,18 @@ $left-gutter: 64px;
             .mx_EventTile_line {
                 margin-inline-start: var(--EventTile_irc_line_info-margin-inline-start);
             }
+
+            .mx_ViewSourceEvent, /* For hidden events */
+            .mx_TextualEvent {
+                line-height: var(--irc-line-height);
+            }
+        }
+
+        &.mx_EventTile_emote {
+            .mx_EventTile_avatar {
+                /* add --right-padding value of MessageTimestamp only */
+                margin-left: calc(var(--name-width) + var(--icon-width) + 1 * var(--right-padding));
+            }
         }
     }
 

res/css/views/rooms/_IRCLayout.pcss

@@ -14,12 +14,14 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-$irc-line-height: $font-18px;
+:root {
+    --irc-line-height: $font-18px;
+}
 
 .mx_IRCLayout {
     --name-width: 80px; /* cf. ircDisplayNameWidth on Settings.tsx */
     --icon-width: 14px;
-    --line-height: $irc-line-height;
+    --line-height: var(--irc-line-height);
     --right-padding: 5px; /* TODO: Use a spacing variable */
 
     line-height: var(--line-height) !important;
@@ -30,155 +32,7 @@ $irc-line-height: $font-18px;
 
     .mx_NewRoomIntro {
         > h2 {
-            line-height: initial; /* Cancel $irc-line-height */
+            line-height: initial; /* Cancel var(--irc-line-height) */
-        }
-    }
-
-    .mx_EventTile[data-layout="irc"] {
-        --EventTile_irc_line-padding-block: 1px;
-
-        display: flex;
-        align-items: flex-start;
-        padding-top: 0;
-
-        > a {
-            text-decoration: none; /* timestamps are links which shouldn't be underlined */
-            min-width: $MessageTimestamp_width; /* ensure space for EventTile without timestamp */
-        }
-
-        > * {
-            margin-right: var(--right-padding);
-        }
-
-        .mx_EventTile_avatar,
-        .mx_EventTile_e2eIcon {
-            height: $irc-line-height;
-        }
-
-        .mx_EventTile_avatar,
-        .mx_DisambiguatedProfile,
-        .mx_EventTile_e2eIcon,
-        .mx_EventTile_msgOption {
-            flex-shrink: 0;
-        }
-
-        .mx_EventTile_avatar {
-            order: 1;
-            position: relative;
-            display: flex;
-            align-items: center;
-
-            /* Need to use important to override the js provided height and width values. */
-            > .mx_BaseAvatar,
-            > .mx_BaseAvatar > * {
-                height: $font-14px !important;
-                width: $font-14px !important;
-                font-size: $font-10px !important;
-                line-height: $font-15px !important;
-            }
-        }
-
-        .mx_DisambiguatedProfile {
-            order: 2;
-            width: var(--name-width);
-            margin-inline-end: 0; /* override mx_EventTile > * */
-
-            > .mx_DisambiguatedProfile_displayName {
-                width: 100%;
-                text-align: end;
-                overflow: hidden;
-                text-overflow: ellipsis;
-            }
-
-            > .mx_DisambiguatedProfile_mxid {
-                visibility: collapse;
-                margin-left: 0; /* Override the inherited margin. */
-                padding: 0 5px; /* TODO: Use a spacing variable */
-            }
-
-            &:hover {
-                overflow: visible;
-                z-index: 10;
-
-                > .mx_DisambiguatedProfile_displayName {
-                    overflow: visible;
-                    display: inline;
-                    background-color: $event-selected-color;
-                    border-radius: 8px 0 0 8px;
-                    padding-right: $spacing-8;
-                }
-
-                > .mx_DisambiguatedProfile_mxid {
-                    visibility: visible;
-                    opacity: 1;
-                    background-color: $event-selected-color;
-                }
-            }
-        }
-
-        .mx_EventTile_e2eIcon {
-            padding: 0;
-            flex-grow: 0;
-            background-position: center;
-        }
-
-        .mx_EventTile_line {
-            .mx_EventTile_e2eIcon,
-            .mx_TextualEvent,
-            .mx_ViewSourceEvent,
-            .mx_MTextBody {
-                /* add a 1px padding top and bottom because our larger
-                emoji font otherwise gets cropped by anti-zalgo */
-                padding: var(--EventTile_irc_line-padding-block) 0;
-            }
-
-            .mx_EventTile_e2eIcon,
-            .mx_TextualEvent,
-            .mx_MTextBody {
-                display: inline-block;
-            }
-
-            .mx_ReplyTile {
-                .mx_MTextBody {
-                    display: -webkit-box; /* Enable -webkit-line-clamp */
-                }
-            }
-        }
-
-        .mx_EventTile_line,
-        .mx_EventTile_reply {
-            order: 3;
-            display: flex;
-            flex-direction: column;
-            flex-grow: 1;
-            flex-shrink: 1;
-            min-width: 0;
-        }
-
-        .mx_EventTile_reply {
-            order: 4;
-        }
-
-        .mx_EventTile_msgOption {
-            order: 5;
-        }
-
-        .mx_EditMessageComposer_buttons {
-            position: relative;
-        }
-
-        &.mx_EventTile_info {
-            .mx_ViewSourceEvent, /* For hidden events */
-            .mx_TextualEvent {
-                line-height: $irc-line-height;
-            }
-        }
-    }
-
-    .mx_EventTile_emote {
-        .mx_EventTile_avatar {
-            /* add --right-padding value of MessageTimestamp only */
-            margin-left: calc(var(--name-width) + var(--icon-width) + 1 * var(--right-padding));
         }
     }