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simply handling temporary zoom levels of webview

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This commit is contained in:
deepak1556 2017-01-31 14:45:45 +05:30
parent e3fe3cc490
commit cbeaa6be87
4 changed files with 45 additions and 35 deletions
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60
atom/browser/web_contents_zoom_controller.cc
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@ -7,6 +7,7 @@
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
@ -20,15 +21,19 @@ namespace atom {
WebContentsZoomController::WebContentsZoomController(
content::WebContents* web_contents)
: content::WebContentsObserver(web_contents) {
: old_process_id_(-1),
old_view_id_(-1),
embedder_zoom_controller_(nullptr),
content::WebContentsObserver(web_contents) {
default_zoom_factor_ = content::kEpsilon;
temporary_zoom_level_ = content::kEpsilon;
host_zoom_map_ = content::HostZoomMap::GetForWebContents(web_contents);
zoom_subscription_ = host_zoom_map_->AddZoomLevelChangedCallback(base::Bind(
&WebContentsZoomController::OnZoomLevelChanged, base::Unretained(this)));
}
WebContentsZoomController::~WebContentsZoomController() {}
WebContentsZoomController::~WebContentsZoomController() {
embedder_zoom_controller_ = nullptr;
}
void WebContentsZoomController::AddObserver(
WebContentsZoomController::Observer* observer) {
@ -40,13 +45,21 @@ void WebContentsZoomController::RemoveObserver(
observers_.RemoveObserver(observer);
}
void WebContentsZoomController::SetEmbedderZoomController(
WebContentsZoomController* controller) {
embedder_zoom_controller_ = controller;
}
void WebContentsZoomController::SetZoomLevel(double level) {
if (!web_contents()->GetRenderViewHost()->IsRenderViewLive() ||
content::ZoomValuesEqual(GetZoomLevel(), level))
return;
if (!content::ZoomValuesEqual(GetTemporaryZoomLevel(), content::kEpsilon)) {
temporary_zoom_level_ = content::kEpsilon;
int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
int render_view_id = web_contents()->GetRenderViewHost()->GetRoutingID();
if (host_zoom_map_->UsesTemporaryZoomLevel(render_process_id,
render_view_id)) {
host_zoom_map_->ClearTemporaryZoomLevel(render_process_id, render_view_id);
}
auto new_zoom_factor = content::ZoomLevelToZoomFactor(level);
@ -76,32 +89,20 @@ double WebContentsZoomController::GetDefaultZoomFactor() {
return default_zoom_factor_;
}
bool WebContentsZoomController::UsesTemporaryZoomLevel() {
return !content::ZoomValuesEqual(temporary_zoom_level_, content::kEpsilon);
}
double WebContentsZoomController::GetTemporaryZoomLevel() {
return temporary_zoom_level_;
}
void WebContentsZoomController::SetTemporaryZoomLevel(double level) {
int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
int render_view_id = web_contents()->GetRenderViewHost()->GetRoutingID();
host_zoom_map_->SetTemporaryZoomLevel(render_process_id, render_view_id,
level);
temporary_zoom_level_ = level;
old_process_id_ = web_contents()->GetRenderProcessHost()->GetID();
old_view_id_ = web_contents()->GetRenderViewHost()->GetRoutingID();
host_zoom_map_->SetTemporaryZoomLevel(old_process_id_, old_view_id_, level);
// Notify observers of zoom level changes.
FOR_EACH_OBSERVER(WebContentsZoomController::Observer, observers_,
OnZoomLevelChanged(web_contents(), level, true));
}
void WebContentsZoomController::DidStartNavigation(
content::NavigationHandle* navigation_handle) {
if (!navigation_handle->IsInMainFrame() || navigation_handle->IsSamePage())
return;
bool WebContentsZoomController::UsesTemporaryZoomLevel() {
int render_process_id = web_contents()->GetRenderProcessHost()->GetID();
int render_view_id = web_contents()->GetRenderViewHost()->GetRoutingID();
host_zoom_map_->ClearTemporaryZoomLevel(render_process_id, render_view_id);
return host_zoom_map_->UsesTemporaryZoomLevel(render_process_id,
render_view_id);
}
void WebContentsZoomController::DidFinishNavigation(
@ -142,11 +143,14 @@ void WebContentsZoomController::SetZoomFactorOnNavigationIfNeeded(
if (content::ZoomValuesEqual(GetDefaultZoomFactor(), content::kEpsilon))
return;
if (!content::ZoomValuesEqual(GetTemporaryZoomLevel(), content::kEpsilon)) {
FOR_EACH_OBSERVER(
WebContentsZoomController::Observer, observers_,
OnZoomLevelChanged(web_contents(), GetTemporaryZoomLevel(), true));
temporary_zoom_level_ = content::kEpsilon;
if (host_zoom_map_->UsesTemporaryZoomLevel(old_process_id_, old_view_id_)) {
host_zoom_map_->ClearTemporaryZoomLevel(old_process_id_, old_view_id_);
}
if (embedder_zoom_controller_ &&
embedder_zoom_controller_->UsesTemporaryZoomLevel()) {
double level = embedder_zoom_controller_->GetZoomLevel();
SetTemporaryZoomLevel(level);
return;
}