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Slow down pointer adjustments at the bottom of the messages.

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The main point of this fix is to move some more scroll-related code
into viewport.js, but it also fixes a bug where the size of #main_div
was not accurately representing the full height of the message list.
Making the calculation more accurate narrows the window where we
do pointer adjustements on mousewheel moves.

(imported from commit 5d821f459284c4dbd5ff8056001e54caf4355f1d)
This commit is contained in:
Steve Howell
2013-05-28 16:36:48 -04:00
parent acbff5682f
commit 975b984aee
3 changed files with 17 additions and 14 deletions
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15
zephyr/static/js/zephyr.js
View File

@@ -1120,15 +1120,6 @@ setInterval(function () {
watchdog_time = new_time;
}, 5000);
function at_top_of_viewport() {
return (viewport.scrollTop() === 0);
}
function at_bottom_of_viewport() {
// outerHeight(true): Include margin
return (viewport.scrollTop() + viewport.height() >= $("#main_div").outerHeight(true));
}
function keep_pointer_in_view() {
var candidate;
var next_row = current_msg_list.selected_row();
@@ -1152,8 +1143,8 @@ function keep_pointer_in_view() {
return true;
}
if (! adjust(above_view_threshold, at_top_of_viewport, rows.next_visible))
adjust(below_view_threshold, at_bottom_of_viewport, rows.prev_visible);
if (! adjust(above_view_threshold, viewport.at_top, rows.next_visible))
adjust(below_view_threshold, viewport.at_bottom, rows.prev_visible);
current_msg_list.select_id(rows.id(next_row), {from_scroll: true});
}
@@ -1164,7 +1155,7 @@ function keep_pointer_in_view() {
// the scrollwheel, the selection should advance until
// I'm at the very top or the very bottom of the page.
function move_pointer_at_page_top_and_bottom(delta) {
if (delta !== 0 && (at_top_of_viewport() || at_bottom_of_viewport())) {
if (delta !== 0 && (viewport.at_top() || viewport.at_bottom())) {
var next_row = current_msg_list.selected_row();
if (delta > 0) {
// Scrolling up (want older messages)