LibWeb: Fix off-by-one when computing available space between floats

Whoops, this explains why things were not lining up correctly. :^)

3 files changed, 6 insertions, 6 deletions

diff --git a/Libraries/LibWeb/Layout/BlockBox.cpp b/Libraries/LibWeb/Layout/BlockBox.cpp
index ed10978314..dc4855975d 100644
--- a/Libraries/LibWeb/Layout/BlockBox.cpp
+++ b/Libraries/LibWeb/Layout/BlockBox.cpp
@@ -113,7 +113,7 @@ void BlockBox::split_into_lines(InlineFormattingContext& context, LayoutMode lay
     auto& container = context.context_box();
     auto* line_box = &container.ensure_last_line_box();
 
-    float available_width = context.available_width_at_line(container.line_boxes().size());
+    float available_width = context.available_width_at_line(container.line_boxes().size() - 1);
 
     if (layout_mode != LayoutMode::OnlyRequiredLineBreaks && line_box->width() > 0 && line_box->width() + width() > available_width) {
         line_box = &container.add_line_box();
diff --git a/Libraries/LibWeb/Layout/ReplacedBox.cpp b/Libraries/LibWeb/Layout/ReplacedBox.cpp
index be2b4d77ec..9b801ba8f1 100644
--- a/Libraries/LibWeb/Layout/ReplacedBox.cpp
+++ b/Libraries/LibWeb/Layout/ReplacedBox.cpp
@@ -129,7 +129,7 @@ void ReplacedBox::split_into_lines(InlineFormattingContext& context, LayoutMode)
     auto height = calculate_height();
 
     auto* line_box = &containing_block.ensure_last_line_box();
-    if (line_box->width() > 0 && line_box->width() + width > context.available_width_at_line(containing_block.line_boxes().size()))
+    if (line_box->width() > 0 && line_box->width() + width > context.available_width_at_line(containing_block.line_boxes().size() - 1))
         line_box = &containing_block.add_line_box();
     line_box->add_fragment(*this, 0, 0, width, height);
 }
diff --git a/Libraries/LibWeb/Layout/TextNode.cpp b/Libraries/LibWeb/Layout/TextNode.cpp
index 0433167093..5438054e9d 100644
--- a/Libraries/LibWeb/Layout/TextNode.cpp
+++ b/Libraries/LibWeb/Layout/TextNode.cpp
@@ -198,7 +198,7 @@ void TextNode::split_into_lines_by_rules(InlineFormattingContext& context, Layou
 
     auto& line_boxes = containing_block.line_boxes();
     containing_block.ensure_last_line_box();
-    float available_width = context.available_width_at_line(line_boxes.size()) - line_boxes.last().width();
+    float available_width = context.available_width_at_line(line_boxes.size() - 1) - line_boxes.last().width();
 
     // Collapse whitespace into single spaces
     if (do_collapse) {
@@ -264,7 +264,7 @@ void TextNode::split_into_lines_by_rules(InlineFormattingContext& context, Layou
 
             if (line_boxes.last().width() > 0 && chunk_width > available_width) {
                 containing_block.add_line_box();
-                available_width = context.available_width_at_line(line_boxes.size());
+                available_width = context.available_width_at_line(line_boxes.size() - 1);
             }
             if (need_collapse & line_boxes.last().fragments().is_empty())
                 continue;
@@ -278,14 +278,14 @@ void TextNode::split_into_lines_by_rules(InlineFormattingContext& context, Layou
         if (do_wrap_lines) {
             if (available_width < 0) {
                 containing_block.add_line_box();
-                available_width = context.available_width_at_line(line_boxes.size());
+                available_width = context.available_width_at_line(line_boxes.size() - 1);
             }
         }
 
         if (do_wrap_breaks) {
             if (chunk.is_break) {
                 containing_block.add_line_box();
-                available_width = context.available_width_at_line(line_boxes.size());
+                available_width = context.available_width_at_line(line_boxes.size() - 1);
             }
         }
     }