mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-24 15:29:45 +03:00
Pass clip rectangle around tree redraw. Update clipping area with respect to what's being plotted. Simplify tree redraw and add more comments.
svn path=/trunk/netsurf/; revision=11056
This commit is contained in:
Michael Drake
parent
f6b0a33fd2
commit
771b0e3b8b
267
desktop/tree.c
267
desktop/tree.c
@ -152,6 +152,11 @@ struct tree {
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callbacks */
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};
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struct rect {
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int x0; int y0; /* Top left coordinate */
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int x1; int y1; /* Bottom right coordinate */
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};
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/**
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* Creates and initialises a new tree.
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@ -479,6 +484,7 @@ struct node *tree_create_folder_node(struct tree *tree, struct node *parent,
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node->data.editable = editable;
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node->sort = NULL;
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node->user_callback = NULL;
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node->previous = NULL;
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tree_recalculate_node_sizes(tree, node, true);
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if (parent != NULL)
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@ -525,6 +531,7 @@ struct node *tree_create_leaf_node(struct tree *tree, struct node *parent,
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node->data.editable = editable;
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node->sort = NULL;
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node->user_callback = NULL;
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node->previous = NULL;
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tree_recalculate_node_sizes(tree, node, true);
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if (parent != NULL)
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@ -1510,13 +1517,15 @@ static void tree_draw_node_expansion_toggle(struct tree *tree,
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/**
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* Draws an element, including any expansion icons
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*
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* \param tree the tree to draw an element for
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* \param element the element to draw
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* \param tree_x X coordinate of the tree
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* \param tree_y Y coordinate of the tree
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* \param tree the tree to draw an element for
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* \param element the element to draw
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* \param tree_x X coordinate to draw the tree at (wrt plot origin)
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* \param tree_y Y coordinate to draw the tree at (wrt plot origin)
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* \param clip clipping rectangle (wrt plot origin)
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*/
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static void tree_draw_node_element(struct tree *tree,
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struct node_element *element, int tree_x, int tree_y)
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struct node_element *element, int tree_x, int tree_y,
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struct rect clip)
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{
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struct bitmap *bitmap = NULL;
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@ -1544,10 +1553,23 @@ static void tree_draw_node_element(struct tree *tree,
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CONTENT_STATUS_READY ||
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content_get_status(icon) ==
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CONTENT_STATUS_DONE)) {
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struct rect c;
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/* Clip to image area */
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c.x0 = x;
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c.y0 = y + icon_inset;
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c.x1 = x + TREE_ICON_SIZE;
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c.y1 = y + icon_inset + TREE_ICON_SIZE;
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if (c.x0 < clip.x0) c.x0 = clip.x0;
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if (c.y0 < clip.y0) c.y0 = clip.y0;
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if (c.x1 > clip.x1) c.x1 = clip.x1;
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if (c.y1 > clip.y1) c.y1 = clip.y1;
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plot.clip(c.x0, c.y0, c.x1, c.y1);
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content_redraw(icon , x, y + icon_inset,
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TREE_ICON_SIZE, TREE_ICON_SIZE,
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x, y + icon_inset, x + TREE_ICON_SIZE,
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y + icon_inset + TREE_ICON_SIZE, 1, 0);
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c.x0, c.y0, c.x1, c.y1, 1, 0);
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/* Restore previous clipping area */
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plot.clip(clip.x0, clip.y0, clip.x1, clip.y1);
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}
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x += NODE_INSTEP;
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@ -1599,99 +1621,136 @@ static void tree_draw_node_element(struct tree *tree,
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*
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* \param tree the tree to draw
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* \param node the node to draw children and siblings of
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* \param tree_x X coordinate of the tree
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* \param tree_y Y coordinate of the tree
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* \param clip_x the minimum x of the clipping rectangle
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* \param clip_y the minimum y of the clipping rectangle
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* \param clip_width the width of the clipping rectangle
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* \param clip_height the height of the clipping rectangle
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* \param tree_x X coordinate to draw the tree at (wrt plot origin)
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* \param tree_y Y coordinate to draw the tree at (wrt plot origin)
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* \param clip clipping rectangle (wrt plot origin)
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*/
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static void tree_draw_node(struct tree *tree, struct node *node,
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int tree_x, int tree_y,
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int clip_x, int clip_y,
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int clip_width, int clip_height)
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int tree_x, int tree_y, struct rect clip)
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{
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struct node_element *element;
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struct node *parent;
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int x_max, y_max;
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int x0, y0, x1, y1;
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struct rect node_extents;
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assert(tree != NULL);
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assert(node != NULL);
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/* Find node's extents, including children's area */
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node_extents.x0 = tree_x + node->box.x - NODE_INSTEP;
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node_extents.y0 = tree_y + node->box.y;
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node_extents.x1 = tree_x + node->box.x + node->box.width + NODE_INSTEP;
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if (node->next != NULL)
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node_extents.y1 = tree_y + node->next->box.y;
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else
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node_extents.y1 = tree_y + node->box.y + node->box.height;
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x_max = clip_x + clip_width + NODE_INSTEP;
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y_max = clip_y + clip_height;
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if ((node->parent->next != NULL) &&
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(node->parent->next->box.y < clip_y))
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/* Node, and its siblings are above clip region */
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/* Nothing to draw, if node is outside clip region */
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if ((node_extents.x1 < clip.x0) && (node_extents.y1 < clip.y0) &&
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(node_extents.x0 > clip.x1) &&
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(node_extents.y0 > clip.y1)) {
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return;
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}
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for (; node != NULL; node = node->next) {
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/* Draw node and all its siblings */
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if (node->box.y > y_max)
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/* Node is below clip region */
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return;
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if ((node->next != NULL) &&
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(!(tree->flags & TREE_NO_FURNITURE))) {
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/* There are more nodes after this
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* Display furniture */
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x0 = x1 = tree_x + node->box.x - (NODE_INSTEP / 2);
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y0 = tree_y + node->box.y + (TREE_LINE_HEIGHT / 2);
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y1 = y0 + node->next->box.y - node->box.y;
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/* Intersect clip region with node's extents */
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if (clip.x0 < node_extents.x0) clip.x0 = node_extents.x0;
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if (clip.y0 < node_extents.y0) clip.y0 = node_extents.y0;
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if (clip.x1 > node_extents.x1) clip.x1 = node_extents.x1;
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if (clip.y1 > node_extents.y1) clip.y1 = node_extents.y1;
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/* Set up the clipping area */
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plot.clip(clip.x0, clip.y0, clip.x1, clip.y1);
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if ((node->previous != NULL) &&
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(!(tree->flags & TREE_NO_FURNITURE))) {
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/* There is a node above this
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* Display furniture; line connecting up to previous */
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x0 = x1 = tree_x + node->box.x - (NODE_INSTEP / 2);
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y0 = tree_y + node->previous->box.y;
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y1 = tree_y + node->box.y + (TREE_LINE_HEIGHT / 2);
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plot.line(x0, y0, x1, y1, &plot_style_stroke_tree_furniture);
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}
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if ((node->next != NULL) &&
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(!(tree->flags & TREE_NO_FURNITURE))) {
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/* There is a node below this
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* Display furniture; line connecting down to next */
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x0 = x1 = tree_x + node->box.x - (NODE_INSTEP / 2);
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y0 = tree_y + node->box.y + (TREE_LINE_HEIGHT / 2);
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y1 = tree_y + node->next->box.y;
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plot.line(x0, y0, x1, y1, &plot_style_stroke_tree_furniture);
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}
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/* Node is inside clip region */
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if (!(tree->flags & TREE_NO_FURNITURE)) {
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/* Display furniture */
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parent = node->parent;
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if ((parent != NULL) && (parent != tree->root) &&
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(parent->child == node)) {
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/* Node is first child */
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x0 = x1 = tree_x + parent->box.x + (NODE_INSTEP / 2);
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y0 = tree_y + parent->data.box.y +
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parent->data.box.height;
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y1 = y0 + (TREE_LINE_HEIGHT / 2);
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plot.line(x0, y0, x1, y1,
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&plot_style_stroke_tree_furniture);
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}
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if ((node->box.x < x_max) && (node->box.y < y_max) &&
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(node->box.x + node->box.width + NODE_INSTEP >=
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clip_x) &&
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(node->box.y + node->box.height >= clip_y)) {
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/* Node is inside clip region */
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if (!(tree->flags & TREE_NO_FURNITURE)) {
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/* Display furniture */
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parent = node->parent;
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if ((parent != NULL) &&
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(parent != tree->root) &&
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(parent->child == node)) {
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/* Node is first child */
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x0 = x1 = tree_x + parent->box.x +
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(NODE_INSTEP / 2);
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y0 = tree_y + parent->data.box.y +
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parent->data.box.height;
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y1 = y0 + (TREE_LINE_HEIGHT / 2);
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plot.line(x0, y0, x1, y1,
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&plot_style_stroke_tree_furniture);
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}
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/* Line from expansion toggle to icon */
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x0 = tree_x + node->box.x - (NODE_INSTEP / 2);
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x1 = x0 + (NODE_INSTEP / 2) - 2;
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y0 = y1 = tree_y + node->data.box.y +
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node->data.box.height -
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(TREE_LINE_HEIGHT / 2);
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plot.line(x0, y0, x1, y1,
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&plot_style_stroke_tree_furniture);
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tree_draw_node_expansion_toggle(tree, node,
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tree_x, tree_y);
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}
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if (node->expanded) {
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for (element = &node->data; element != NULL;
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element = element->next) {
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/* Draw each element of expanded node */
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tree_draw_node_element(tree, element,
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tree_x, tree_y);
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}
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} else {
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/* Draw main title element of node */
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tree_draw_node_element(tree, &node->data,
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tree_x, tree_y);
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}
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/* Line from expansion toggle to icon */
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x0 = tree_x + node->box.x - (NODE_INSTEP / 2);
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x1 = x0 + (NODE_INSTEP / 2) - 2;
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y0 = y1 = tree_y + node->data.box.y + node->data.box.height -
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(TREE_LINE_HEIGHT / 2);
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plot.line(x0, y0, x1, y1, &plot_style_stroke_tree_furniture);
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tree_draw_node_expansion_toggle(tree, node, tree_x, tree_y);
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}
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if (node->expanded) {
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for (element = &node->data; element != NULL;
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element = element->next) {
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/* Draw each element of expanded node */
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tree_draw_node_element(tree, element, tree_x, tree_y,
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clip);
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}
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if ((node->child != NULL) && (node->expanded)) {
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/* Draw an expanded node's children */
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tree_draw_node(tree, node->child, tree_x, tree_y,
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clip_x, clip_y,
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clip_width, clip_height);
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} else {
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/* Draw main title element of node */
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tree_draw_node_element(tree, &node->data, tree_x, tree_y, clip);
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}
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}
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/**
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* Redraws a node's descendants.
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*
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* \param tree the tree to draw
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* \param node the node to draw children and siblings of
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* \param tree_x X coordinate to draw the tree at (wrt plot origin)
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* \param tree_y Y coordinate to draw the tree at (wrt plot origin)
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* \param clip clipping rectangle (wrt plot origin)
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*/
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static void tree_draw_tree(struct tree *tree, struct node *node,
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int tree_x, int tree_y, struct rect clip)
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{
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struct node *child;
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assert(tree != NULL);
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assert(node != NULL);
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for (child = node->child; child != NULL; child = child->next) {
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/* Draw children that are inside the clip region */
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if (child->next != NULL &&
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(child->next->box.y + tree_y < clip.y0))
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/* Child is above clip region */
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continue;
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if (child->box.y + tree_y > clip.y1)
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/* Child is below clip region
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* further siblings will be too */
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return;
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/* Draw current child */
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tree_draw_node(tree, child, tree_x, tree_y, clip);
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/* And its children */
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if ((child->child != NULL) && (child->expanded)) {
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/* Child has children and they are visible */
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tree_draw_tree(tree, child, tree_x, tree_y, clip);
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}
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}
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}
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@ -1701,46 +1760,46 @@ static void tree_draw_node(struct tree *tree, struct node *node,
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* Redraws a tree.
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*
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* \param tree the tree to draw
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* \param x X coordinate to draw the tree at
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* \param y Y coordinate to draw the tree at
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* \param clip_x the minimum x of the clipping rectangle relative to
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* the tree origin
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* \param clip_y the minimum y of the clipping rectangle relative to
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* the tree origin
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* \param clip_width the width of the clipping rectangle
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* \param clip_height the height of the clipping rectangle
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* \param x X coordinate to draw the tree at (wrt plot origin)
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* \param y Y coordinate to draw the tree at (wrt plot origin)
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* \param clip_x minimum x of the clipping rectangle (wrt tree origin)
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* \param clip_y minimum y of the clipping rectangle (wrt tree origin)
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* \param clip_width width of the clipping rectangle
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* \param clip_height height of the clipping rectangle
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*/
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void tree_draw(struct tree *tree, int x, int y,
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int clip_x, int clip_y, int clip_width, int clip_height)
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{
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int absolute_x, absolute_y;
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struct rect clip;
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assert(tree != NULL);
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assert(tree->root != NULL);
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/* don't draw empty trees or trees with redraw flag set to false */
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if (tree->root->child == NULL || !tree->redraw) return;
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if (tree->root->child == NULL || !tree->redraw)
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return;
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tree_text_size_px =
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(TREE_TEXT_SIZE_PT * FIXTOINT(nscss_screen_dpi) + 36) /
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72;
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absolute_x = x + clip_x;
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absolute_y = y + clip_y;
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plot.rectangle(absolute_x, absolute_y,
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absolute_x + clip_width, absolute_y + clip_height,
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clip.x0 = x + clip_x;
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clip.y0 = y + clip_y;
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clip.x1 = clip.x0 + clip_width;
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clip.y1 = clip.y0 + clip_height;
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plot.rectangle(clip.x0, clip.y0, clip.x1, clip.y1,
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&plot_style_fill_tree_background);
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plot.clip(absolute_x, absolute_y,
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absolute_x + clip_width, absolute_y + clip_height);
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tree_draw_node(tree, tree->root->child, x, y, clip_x,
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clip_y, clip_width, clip_height);
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plot.clip(clip.x0, clip.y0, clip.x1, clip.y1);
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tree_draw_tree(tree, tree->root, x, y, clip);
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if (tree->editing != NULL) {
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x = x + tree->editing->box.x;
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y = y + tree->editing->box.y;
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if (tree->editing->type == NODE_ELEMENT_TEXT_PLUS_ICON)
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x += NODE_INSTEP;
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textarea_redraw(tree->textarea, x, y, absolute_x, absolute_y,
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absolute_x + clip_width,
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absolute_y + clip_height);
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textarea_redraw(tree->textarea, x, y,
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clip.x0, clip.y0, clip.x1, clip.y1);
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}
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}
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