| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "chrome/browser/ui/views/location_bar/location_bar_layout.h" |
| |
| #include "chrome/browser/themes/theme_properties.h" |
| #include "ui/gfx/geometry/rect.h" |
| #include "ui/views/view.h" |
| |
| // Description of a decoration to be added inside the location bar, either to |
| // the left or to the right. |
| struct DecorationInfo { |
| DecorationInfo(int y, |
| int height, |
| bool auto_collapse, |
| double max_fraction, |
| int edge_item_padding, |
| views::View* view); |
| |
| // The y position of the view inside its parent. |
| int y; |
| |
| // The height of the view. |
| int height; |
| |
| // True means that, if there is not enough available space in the location |
| // bar, the view will reduce its width either to its minimal width or to zero |
| // (making it invisible), whichever fits. If true, |max_fraction| must be 0. |
| bool auto_collapse; |
| |
| // Used for resizeable decorations, indicates the maximum fraction of the |
| // location bar that can be taken by this decoration, 0 for non-resizable |
| // decorations. If non-zero, |auto_collapse| must be false. |
| double max_fraction; |
| |
| // Padding to use if the decoration is the first element next to the edge. |
| int edge_item_padding; |
| |
| views::View* view; |
| |
| // The width computed by the layout process. |
| double computed_width; |
| }; |
| |
| DecorationInfo::DecorationInfo(int y, |
| int height, |
| bool auto_collapse, |
| double max_fraction, |
| int edge_item_padding, |
| views::View* view) |
| : y(y), |
| height(height), |
| auto_collapse(auto_collapse), |
| max_fraction(max_fraction), |
| edge_item_padding(edge_item_padding), |
| view(view), |
| computed_width(0) { |
| DCHECK((max_fraction == 0.0) || (!auto_collapse && (max_fraction > 0.0))); |
| } |
| |
| |
| // LocationBarLayout --------------------------------------------------------- |
| |
| LocationBarLayout::LocationBarLayout(Position position, int item_edit_padding) |
| : position_(position), item_edit_padding_(item_edit_padding) {} |
| |
| LocationBarLayout::~LocationBarLayout() { |
| } |
| |
| void LocationBarLayout::AddDecoration(int y, |
| int height, |
| bool auto_collapse, |
| double max_fraction, |
| int edge_item_padding, |
| views::View* view) { |
| decorations_.push_back(std::make_unique<DecorationInfo>( |
| y, height, auto_collapse, max_fraction, edge_item_padding, view)); |
| } |
| |
| void LocationBarLayout::LayoutPass1(int* entry_width) { |
| bool first_item = true; |
| for (const auto& decoration : decorations_) { |
| // Autocollapsing decorations are ignored in this pass. |
| if (first_item && !decoration->auto_collapse) |
| *entry_width -= decoration->edge_item_padding; |
| first_item = false; |
| // Resizing decorations are ignored in this pass. |
| if (!decoration->auto_collapse && (decoration->max_fraction == 0.0)) { |
| decoration->computed_width = decoration->view->GetPreferredSize().width(); |
| *entry_width -= decoration->computed_width; |
| } |
| } |
| *entry_width -= item_edit_padding_; |
| } |
| |
| void LocationBarLayout::LayoutPass2(int *entry_width) { |
| for (const auto& decoration : decorations_) { |
| if (decoration->max_fraction > 0.0) { |
| int max_width = static_cast<int>(*entry_width * decoration->max_fraction); |
| decoration->computed_width = std::min( |
| decoration->view->GetPreferredSize().width(), |
| std::max(decoration->view->GetMinimumSize().width(), max_width)); |
| *entry_width -= decoration->computed_width; |
| } |
| } |
| } |
| |
| void LocationBarLayout::LayoutPass3(gfx::Rect* bounds, int* available_width) { |
| bool first_visible = true; |
| for (const auto& decoration : decorations_) { |
| int padding = first_visible ? decoration->edge_item_padding : 0; |
| |
| // Collapse decorations if needed. |
| if (decoration->auto_collapse) { |
| // Try preferred size, if it fails try minimum size, if it fails collapse. |
| decoration->computed_width = decoration->view->GetPreferredSize().width(); |
| if (decoration->computed_width + padding > *available_width) |
| decoration->computed_width = decoration->view->GetMinimumSize().width(); |
| if (decoration->computed_width + padding > *available_width) { |
| decoration->computed_width = 0; |
| decoration->view->SetVisible(false); |
| continue; |
| } |
| (*available_width) -= decoration->computed_width + padding; |
| } |
| decoration->view->SetVisible(true); |
| first_visible = false; |
| |
| // Layout visible decorations. |
| int x = (position_ == LEFT_EDGE) |
| ? (bounds->x() + padding) |
| : (bounds->right() - padding - decoration->computed_width); |
| decoration->view->SetBounds(x, decoration->y, decoration->computed_width, |
| decoration->height); |
| bounds->set_width(bounds->width() - padding - decoration->computed_width); |
| if (position_ == LEFT_EDGE) |
| bounds->set_x(bounds->x() + padding + decoration->computed_width); |
| } |
| bounds->set_width(bounds->width() - item_edit_padding_); |
| if (position_ == LEFT_EDGE) |
| bounds->set_x(bounds->x() + item_edit_padding_); |
| } |