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feat(web-app-chat-with-file): add expand/collapse toggle to diff view #536

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Merged
LukasHirt merged 1 commit into from
Jul 29, 2026
Merged

feat(web-app-chat-with-file): add expand/collapse toggle to diff view #536

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70 changes: 63 additions & 7 deletions packages/web-app-chat-with-file/src/components/ChatPanel.vue
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Original file line number Diff line number Diff line change
Expand Up @@ -48,14 +48,30 @@
}}
</button>
<div v-if="!message.applied || isDiffExpanded(index)">
<div v-if="getDiff(index).length > 0" class="diff-block">
<template v-if="getDiff(index).length > 0">
<div
v-for="(line, li) in getDiff(index)"
:key="li"
class="diff-line"
:class="`diff-line--${line.type}`"
>{{ diffPrefix(line.type) }}{{ line.text }}</div>
</div>
class="diff-block"
:class="{ 'diff-block--tall': isDiffHeightExpanded(index) }"
>
<div
v-for="(line, li) in getDiff(index)"
:key="li"
class="diff-line"
:class="`diff-line--${line.type}`"
>{{ diffPrefix(line.type) }}{{ line.text }}</div>
</div>
<button
v-if="isDiffLong(index)"
class="diff-height-toggle"
@click="toggleDiffHeight(index)"
>
{{
isDiffHeightExpanded(index)
? $gettext('Collapse')
: $gettext('Expand')
}}
</button>
</template>
<div v-else class="diff-empty">{{ $gettext('No changes detected.') }}</div>
</div>
</div>
Expand Down Expand Up @@ -239,6 +255,24 @@ function getDiff(index: number): FlatLine[] {
return messageDiffs.value[index] ?? []
}

const DIFF_LONG_THRESHOLD = 12

function isDiffLong(index: number): boolean {
return getDiff(index).length > DIFF_LONG_THRESHOLD
}

const expandedDiffHeights = ref<number[]>([])

function isDiffHeightExpanded(index: number): boolean {
return expandedDiffHeights.value.includes(index)
}

function toggleDiffHeight(index: number): void {
expandedDiffHeights.value = isDiffHeightExpanded(index)
? expandedDiffHeights.value.filter((i) => i !== index)
: [...expandedDiffHeights.value, index]
}

const expandedDiffs = ref<number[]>([])

function isDiffExpanded(index: number): boolean {
Expand Down Expand Up @@ -283,6 +317,7 @@ watch(
if (newId && oldId && newId !== oldId) {
mode.value = 'chat'
diffCache.clear()
expandedDiffHeights.value = []
}
}
)
Expand Down Expand Up @@ -388,6 +423,27 @@ onMounted(() => {
overflow-y: auto;
}

.diff-block--tall {
max-height: 600px;
}

.diff-height-toggle {
display: block;
width: 100%;
background: none;
border: none;
cursor: pointer;
font-size: 0.75rem;
font-family: inherit;
color: var(--oc-color-swatch-primary-default, #0d6efd);
padding: 4px 0;
text-align: center;
}

.diff-height-toggle:hover {
text-decoration: underline;
}

.diff-line {
display: block;
white-space: pre;
Expand Down