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element scroll setters
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Zhen Zhang
parent
fefdaf76de
commit
11b12f677b
8 changed files with 364 additions and 41 deletions
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@ -20,6 +20,7 @@ use dom::bindings::codegen::Bindings::HTMLInputElementBinding::HTMLInputElementM
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use dom::bindings::codegen::Bindings::HTMLTemplateElementBinding::HTMLTemplateElementMethods;
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use dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
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use dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
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use dom::bindings::codegen::Bindings::WindowBinding::{ScrollBehavior, ScrollToOptions};
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use dom::bindings::codegen::UnionTypes::NodeOrString;
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use dom::bindings::error::{Error, ErrorResult, Fallible};
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use dom::bindings::global::GlobalRef;
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@ -1227,6 +1228,49 @@ impl Element {
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_ => Err(Error::Syntax)
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}
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scroll
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pub fn scroll(&self, x_: f64, y_: f64, behavior: ScrollBehavior) {
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// Step 1.2 or 2.3
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let x = if x_.is_finite() { x_ } else { 0.0f64 };
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let y = if y_.is_finite() { y_ } else { 0.0f64 };
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let node = self.upcast::<Node>();
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// Step 3
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let doc = node.owner_doc();
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// Step 4
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if !doc.is_fully_active() {
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return;
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}
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// Step 5
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let win = doc.DefaultView();
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// Step 7
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if *self.root_element() == *self {
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if doc.quirks_mode() != Quirks {
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win.scroll(x, y, behavior);
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}
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return;
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}
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// Step 9
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if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
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doc.quirks_mode() == Quirks &&
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!self.potentially_scrollable() {
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win.scroll(x, y, behavior);
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return;
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}
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// Step 10 (TODO)
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// Step 11
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win.scroll_node(node.to_trusted_node_address(), x, y, behavior);
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}
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}
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impl ElementMethods for Element {
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@ -1483,66 +1527,218 @@ impl ElementMethods for Element {
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rect.size.height.to_f64_px())
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scroll
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fn Scroll(&self, options: &ScrollToOptions) {
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// Step 1
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let left = options.left.unwrap_or(self.ScrollLeft());
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let top = options.top.unwrap_or(self.ScrollTop());
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self.scroll(left, top, options.parent.behavior);
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scroll
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fn Scroll_(&self, x: f64, y: f64) {
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self.scroll(x, y, ScrollBehavior::Auto);
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scrollto
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fn ScrollTo(&self, options: &ScrollToOptions) {
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self.Scroll(options);
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scrollto
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fn ScrollTo_(&self, x: f64, y: f64) {
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self.Scroll_(x, y);
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scrollby
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fn ScrollBy(&self, options: &ScrollToOptions) {
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// Step 2
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let delta_left = options.left.unwrap_or(0.0f64);
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let delta_top = options.top.unwrap_or(0.0f64);
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let left = self.ScrollLeft();
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let top = self.ScrollTop();
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self.scroll(left + delta_left, top + delta_top,
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options.parent.behavior);
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scrollby
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fn ScrollBy_(&self, x: f64, y: f64) {
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let left = self.ScrollLeft();
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let top = self.ScrollTop();
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self.scroll(left + x, top + y, ScrollBehavior::Auto);
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scrolltop
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fn ScrollTop(&self) -> f64 {
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let node = self.upcast::<Node>();
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// 1. Let document be the element’s node document.
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// Step 1
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let doc = node.owner_doc();
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// 2. If the document is not the active document, return zero and terminate these steps.
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// Step 2
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if !doc.is_fully_active() {
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return 0.0;
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} else {
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// 3. Let window be the value of document’s defaultView attribute.
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let win = doc.DefaultView();
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}
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// 5. If the element is the root element and document is in quirks mode,
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// return zero and terminate these steps.
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if *self.root_element() == *self {
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if doc.quirks_mode() == Quirks {
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return 0.0;
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}
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// Step 3
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let win = doc.DefaultView();
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// 6. If the element is the root element return the value of scrollY on window.
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return (*win).ScrollY() as f64;
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}
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// 7. If the element is the HTML body element, document is in quirks mode,
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// and the element is not potentially scrollable, return the value of scrollY on window.
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if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
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doc.quirks_mode() == Quirks &&
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!self.potentially_scrollable() {
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return (*win).ScrollY() as f64;
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}
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// 8. If the element does not have any associated CSS layout box, return zero and terminate these steps.
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if !self.has_css_layout_box() {
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// Step 5
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if *self.root_element() == *self {
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if doc.quirks_mode() == Quirks {
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return 0.0;
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}
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// 9. Return the y-coordinate of the scrolling area at the alignment point
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// with the top of the padding edge of the element.
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let point = node.scroll_offset();
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return -point.y as f64;
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// Step 6
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return win.ScrollY() as f64;
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}
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// Step 7
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if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
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doc.quirks_mode() == Quirks &&
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!self.potentially_scrollable() {
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return win.ScrollY() as f64;
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}
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// Step 8
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if !self.has_css_layout_box() {
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return 0.0;
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}
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// Step 9
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let point = node.scroll_offset();
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return point.y.abs() as f64;
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scrolltop
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fn SetScrollTop(&self, _scroll_top: f64) {
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unimplemented!()
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fn SetScrollTop(&self, y_: f64) {
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let behavior = ScrollBehavior::Auto;
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// Step 1, 2
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let y = if y_.is_finite() { y_ } else { 0.0f64 };
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let node = self.upcast::<Node>();
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// Step 3
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let doc = node.owner_doc();
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// Step 4
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if !doc.is_fully_active() {
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return;
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}
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// Step 5
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let win = doc.DefaultView();
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// Step 7
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if *self.root_element() == *self {
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if doc.quirks_mode() != Quirks {
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win.scroll(win.ScrollX() as f64, y, behavior);
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}
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return;
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}
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// Step 9
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if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
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doc.quirks_mode() == Quirks &&
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!self.potentially_scrollable() {
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win.scroll(win.ScrollX() as f64, y, behavior);
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return;
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}
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// Step 10 (TODO)
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// Step 11
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win.scroll_node(node.to_trusted_node_address(), self.ScrollLeft(), y, behavior);
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scrollleft
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// https://drafts.csswg.org/cssom-view/#dom-element-scrolltop
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fn ScrollLeft(&self) -> f64 {
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let point = self.upcast::<Node>().scroll_offset();
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return -point.x as f64;
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let node = self.upcast::<Node>();
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// Step 1
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let doc = node.owner_doc();
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// Step 2
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if !doc.is_fully_active() {
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return 0.0;
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}
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// Step 3
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let win = doc.DefaultView();
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// Step 5
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if *self.root_element() == *self {
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if doc.quirks_mode() != Quirks {
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// Step 6
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return win.ScrollX() as f64;
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}
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return 0.0;
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}
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// Step 7
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if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
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doc.quirks_mode() == Quirks &&
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!self.potentially_scrollable() {
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return win.ScrollX() as f64;
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}
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// Step 8
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if !self.has_css_layout_box() {
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return 0.0;
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}
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// Step 9
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let point = node.scroll_offset();
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return point.x.abs() as f64;
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scrollleft
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fn SetScrollLeft(&self, _scroll_left: f64) {
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unimplemented!()
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fn SetScrollLeft(&self, x_: f64) {
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let behavior = ScrollBehavior::Auto;
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// Step 1, 2
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let x = if x_.is_finite() { x_ } else { 0.0f64 };
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let node = self.upcast::<Node>();
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// Step 3
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let doc = node.owner_doc();
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// Step 4
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if !doc.is_fully_active() {
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return;
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}
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// Step 5
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let win = doc.DefaultView();
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// Step 7
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if *self.root_element() == *self {
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if doc.quirks_mode() == Quirks {
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return;
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}
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win.scroll(x, win.ScrollY() as f64, behavior);
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return;
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}
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// Step 9
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if doc.GetBody().r() == self.downcast::<HTMLElement>() &&
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doc.quirks_mode() == Quirks &&
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!self.potentially_scrollable() {
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win.scroll(x, win.ScrollY() as f64, behavior);
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return;
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}
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// Step 10 (TODO)
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// Step 11
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win.scroll_node(node.to_trusted_node_address(), x, self.ScrollTop(), behavior);
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}
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// https://drafts.csswg.org/cssom-view/#dom-element-scrollwidth
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